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I I
I I I
CONTENTS
ABSTRACT
I NTRODUCT I ON
DESCRIPTION OF SURVTY AREAS(a) WELLSTEAD ESTUARY
(b) BEAUFORT INLET
i4ET|-|ODS( a ) F I E L D I N F O R M A T I O N
(b) LABORATORY METHODS AND ANALYSES
RESULTS1. NET }- l SHI I$G INTENSITY
PAGE
9
9
t_1
I 1
1 t -
L 2
L 2
L 3
L 4
L/,
L 1
1 5
I 5
1 5
1 6
IV
2 .
7
(a) WELLSTEAD ESTUARY
(b) BEAUFORT INLET
SPECIES COIVIPOSITION AND QUANTITIES CAUGHT
(a) WELLSTEAD ESTUARY
(b) BEAUFORT INLET
THE RELATIONSHIP BETWEEN THE MESH SIZEUSED, CATCH RATES AND
SPECIES SIZE
1 .
5 .
6 .
C O M P O S I T I O N .
( a ) S E A M U L L E T
(b) SIX_SPINED LEATHERJACKET
(c) YELLoW-EYE MULLET
(d) BLACK BREAM
(e) AUSTRALIAN HERRING
( f ) C O B B L E R
LENGTH-WEIGHT RE LATlONSHI PS
SUCCESS RATE
OPINIONS ABOUT FISHING IN THE TWO
L7
r 7
L 7
L 7
1 8
1 8
1 8
1 A
ESTUARIES L9
-
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SINltlS90lll'{0N)lV
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AUVNTSS CIVSIS'ITSM (E)
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sgrcsds &NsusJJrct Jo ssHcJVc 'a
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2 .
3
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1 .
1 0 .
1 1 .
o
TABLESPage
Frequency of gi I l net sets by f ishing part iesin Wel lstead
estuary and Beaufort I r r t f et f rom5-3o January, 1981- . 25
The numbe r of sets by mesh size (mm) at s i tes in(a) Weltstead
estuary (BR) and at (b) BeaufortInfet (PA) in January 1981' The
cumuf at j -ve 7"f igures for use of net meshes befow the legal-mi
i imum 76 mm and above this s ize are also shown' 26
Relat ive abundance and mean weight of f ishand crustacea caught
by set nets at Wel lsteadestuary and Beaufort In let i r respect
ive of meshs i ze used . Ed ib le spec ies a re marked by as te r i
sk . 27
Dai ly net f ishing in Wel]stead estuary 'January 1981 . 28
Dai ly net f ishing in Beaufort In let , January L981 . 29
A comparison of the catcfres and catch ratesof sea muf let by 30
m monof i lament nets f romday sets at two l ight ly f ished si tes
in BeaufortIn1et, January 1981 ' 30
Mean ca tch ra tes (No . pe r ove rn igh t se t ) o f f i shand
crabs caught by di f ferent s ized mesh inWel lstead estuary,
January 1981. Brackets denoteca tch f rom a s ing le se t . 31
Mean catch rates (No. per overnight set) bydi f ferent s ized
mesfr used in the Beaufort In let 'January 1981-. Brackets denote
catch from a singles e t . 3 2
Slze composit ion, mean lengthr and standarddeviat ion (S) of
sea mul let caught by set nets ofd i f f e ren t mesh s i ze i n we
l l s tead es tua ry (BR)and Beaufort Infet (pn), January 1981 .
33
Size composit ion ' meandev ia t i on (S ) o f s i x - sset nets
of di f ferentestuary (BR), January
length and standardined leather jacket caught bY
1 9 8 1 .
Size composit ion, mean length and standarddeviat ion (S) of yel
low-eye mulfet caught by setnets of di f ferent mesh size in Wel
lstead estuary(BR) and Beau fo r t I n l -e t (PA) , January 1981
.
Size composit ion, mean length and standarddeviat ion (S) of
black bream caught by setnets of di f ferent mesfr s ize in wel
lstead estuary(BR) and Beau fo r t rn le t (PA) , January 198 l '
.
t 2 .
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pue drenlsa pealsTTaM (e) uT u€uraqsTJJnaleue Jo uorlelcadxe o1
dn p€JnsEau sleu
las uoJJ sqeJJ pup qsTJ Jo seqcles 1En13e MOH
'T86T d.renuef ur ?aTuJ ?JoJneag (q) pue .,{renlsapealsTTaM (E)
uT lau +es .{q lqbnec seTcads
qsrJ lup?Jodurr JoJ sdrqsuorfeTa"r lqbtam-q16ua'1
' T86T /{renuec ' ( vd ) 1aluJ lroJneag pue(ua) 6.renfsa
pealsTTel\4 uf_jSfaqs€u luaraJJrp Jo
a^ ^rt^6h^ r^ /^\ re+eq +er lr\{ +\{,JncJ Jd tqquJ JU ( S )
rIOTleTAep
prepuels pue q16ua1 rteeu 'uoTlTsoduoc azTS
'T861 6renuef '(US)
^JEn+se ppalsTTeM uT ezls qseu luaJaJJrp Jo sleu1as dq 1q6nec
6ur. JJat{ tre r. TeJls Jo ( S ) uoTlerlep
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1 .
FIGURESpage
Wellstead estuary and Bremer River ' showing netf ishing si tes
and the relat ionship of th is systemto othEr south coast estuar
ies. 41
Beaufort In let and Pal l inup River ' showingnet f ishing si
tes and the relat ionship of th issvstem to other south coast
estuar ies. 42
2 .
The number and statusamongst those Part iesWel l stead estuary
andJanuary 19 81 survey.
of net f i .shing part iesin te rv iewed f rom (a )(b) Beaufort
In let dur ing the
1. D is t r ibu t ion o f f i sh ing e f fo r t in respec t o f
mesh 4 4s l - z e .
7 .
Coastal features of Beaufort In let and part of thePal l inup
Ri-ver, for which a closure to net f ishingi s p roposed .
Catch rates of edible f lsh in Wel lstead estuary,January 1981,
plot ted as mean I and range f forthree day intervals. The number
of samples isshown at the maximum Point.
Ca tch ra tes o f ed ib le f i sh i n Beau fo r t I n le t
'January 1981, ptot ted as mean I and range I forthree day
intervals ' The number of samples isshown at the maxj,mum
Point.
Length composlt ion of the total measured catcho f se lec ted
spec ies o f f i sh taken i n a l l s i zesof mesh combined from
Wel lstead estuary (BRI )and Beaufort rnlet (PA E::= ) . MLS is
minimumlegal s ize; the MLS for cobbler was est imated froman equat
ion relat ing f i -n length to total length.
9. goastal features of the Bremer Bay area' showingaccess roads
and part of the Bremer River c losed tone t f i sh inq .
4 3
4 5
4 6
4 7
4 8
-
,9
'urEaJq r{ceIq aL{1 ' ruaqcTn q c'ntr6nd oqTuoc y
a^a-MoTled ar4a' rua7"u " t "rr"r:"r:;i;
. la]{cE freqleeTpeulds-xTS at4q 'rTautcfiaztj o
ruay)rlnaltt
laTTnu Ees eql 'vnToqdac 7t6nq1
'Tg6T .r{Jpnuef t..tJEnlse peelsTIoM ur1as 1au JnaleuE rre uoJJ
qclec abe'rale oloqe uV
'Jen rJuMop 6ut:1oo1 eJor{s alTsoddo aq1rrr^r- r-^r.,
z{6rr-r
LTed a^ec MoTIeMs Jo MaT./\ v
'JEqpues JaTJJeq aq1 Jeau'gT efTs
Jo pue uJeqlnos eql uroJJ +au 1as eur 6urlneq leTuJ lJoJneeg 1e
dlred SurqsTJ V
t9
z9
.rs 'z9 alTsspJemol z{Jenlsa eq1 dn Futqool 'Tg6T .{Jenuef,
ur
uoouJaJJ€ euo eleT '^Jenlse peelsTTe$ Jo MerA
09 (osTe T '6tg aasl +JaT le sru:,r g 5og pue 1q6r"r le sr
Jeqpues JaTJJeq ei{I 'MoT
^ren seM TaAaT rofeM '186I TTrdV ur ua{81 'TIrH
lno{oo-I uroJJ '^Jenlsa pEa+sTIaM Jo eueJoued
a6ed
S]IVId
-
APPENDICES
Shire of Gnowangerup by-faws relat ing to f ishingwhich were in
ef fect between l -958 and october 3 '1 9 8 0 .
Detai ls of the opening and closure to the sea ofwei l tstead
estuary from al l avai lable records.
Surface sal in i ty samples taken from Wel lsteadestuary and
Bremer River in January, 1981 .
Surface sal in i ty samples taken from Beaufort In letand Pal l
inup River in January, 1981 .
The fet ter of introduct ion given to the f lshingpubl ic in the
areas dealt wi th by t f le survey.
Fish catches reported by di f ferent f ishing part les
mainfy using 76 mm mesh set nets s ince L August '1981 i n Wef l
s tead es tua rY .
Page
1 .
2
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qcrqrur
Jo uorsran +uoceJ lsou aql 'Furqsr; aau las o1 6ur1e tal
sMpI-^q
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letuT^-^^h 4,.
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+ 1.1\ L+J!? uuTqSTJ
aql Jo loJ'luo3 pEq I ! JunoC aJ rqs dn"rabuevroug arjl ' gt 6T
JOur S
NO I I]NIOUIN I
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uotTre.odwoc r'a taadz aq7
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vDa2/?V(n
fiuon7r.a aUT u! wD"vq y)DTq %tt puD y"TTnw D?v %gg r/Dn
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oTnp
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auayrn fiunnTrza
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1./ opaTTnnba r/aVaTD) au?!(n laTu[ +To]nD?€/ uf (%rg ) T"TTnw nar'
fiTurout
yy rn pauodwoc fiztnnTr'a pD"lvTT"lft ul (%tt ) Taelsnfua4TnaT
paurclv-x tvpuD lolg{ ) 7z77nu Daf/ ?2/?n "?u)7D) 7au }a" ut za
rtadc. TuDurao7
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yr.au 7o6a7
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rq)Duau?/aV"r/ TaN 'fitton7r,a 1/)D" ut auDv ?!T lnoqD vDm
fianunr,
aq7 6urtnp "la" /o vaqwnt TDTIT "H / 'par,n 6uraq vaVv?u! jo
z6unzaw rll-/.5 "v7 urvTrm DavD qzDa ut z/DTnoao Tvou vDn (v"
lTDnTva
avaU7 1/o/ paTTtwttad yvaw a9rr. 7n6a7 wnwrurw aU] ) ?7au Uv?a,w
g/ .r/7au 7ar' par,n fut/ '7"Tu[ 7uo]ntta.7 7D 7aw tatTuod 55
]olno T"Trlln /7"u 7a/ p??n %9 'fi"^unv 6uttnp fiton7c'a
PD"lr/TT?tf TDy"a v?rT?./Dd {t, lo TD7o7 D lo TnO "%9, - .%91
puD "%t9 - ""/"r 9
auam fivonTva q2Da ur larTturTDl ")Dfvnv attTcade'au ?1/7 puD
vUTuou
/Z uaj TaTu[ TTofnDa[l puD vVTuour {I1/o} Dav "V7 oT P?vo72
uaaqpny fitron7o.a pDdyvTT"li 'fiatunr. ?y7
lo ?ur7 ?V7 ly 'uotTnTsadxa
, r"V7 oT paundwoc vD u"u?/?1f v 7 j 7au unaTtwD / o "7D1/
r/va)tnv aa/7puD par/n zftz yzau /o Ttadvau ut 7y6nnt Ar,!/ /a
uotTrr.oduot a9 rr.puD f/"L/aTD) yattadc, 'a6rLzn 7u"un)op oT vD{n
fiatunr. "U7
}o "voc/l/ncl"uJ '1957 fittnnunf ut ua>1n7u"pun vDm
v"r?/Dn7v? on7 "r/?117 ur
6utyr,t/ T?u 1/naTDuJD "H7 la fiatunr. D 'OEb I uaqoT)O ut
7uauu2/a^o5uD77D?./?c.nb/ u7./a7/alyt aq7 07 7a7u[ 7TalnD"fl puD
fiz,onlva PD?]vrT"t14 u7
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6urno77o 1
I3 VAI S gV
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r{c.rPasau auT.rew ueTTerlsnv u:alsaM
pTPaH .I pT^eq
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J0 Al^uns 9NIHSIJ 13N UnSIVWV
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-
net def ined as one no longer than 64 m (7o yards) with
a.mlnimum mesh size of 76 rnrn (3") . A recommendat ion that
thecontrol of f ishing in these two r iver systems revert to
theState covernment, under the administration of the Departmentof
Fisher ies and Wildl i fe was made after a tour ln L978 bythe South
coast Parf iamentary Study commlttee ( HasseLl etal . f978). The
recomrnendat ion which fol lowed resul ted ina decisj-on by
Government to amend both the local GoverrrmentAct and the Fisher
ies Act to enable responsibi l i ty for managementof Beaufort Intet
and Weflstead estuary to be transferredto the Department of Fi-sher
les and Wildl l fe.
In pract ical terms, changes to the f lshing regulat i -ons
nowdefined a lawful net as having a length of not more than60 m and
meshes of not less than 76 mm for Wel lstead estuary andBeaufort
lnlet downstream from the southern boundary of Reserve8I7. Upstream
from the Iat ter, a previous regulat ion whichstated that a fawful
net could be no longer thantgz m (150 yds ) w i th a mes l r s i ze
o f no t f ess than 70 mm(2 3/1" ) was cancel led by Not i -ce 25,
Government GazetteNo. 7, 23 January 1981 which therefore made a
lawfu1 net60 m. with a mesh of no fess than 76 mm in al l waters
ofBeaufort In l-et , PalLinup River and their t r ibutar ies.
Asecond not ice imposed a permanent cfosure to net f ishing in
theBremer River upstream of the Narrows (see Figure 1). Except fora
sl ight reduct ion in net length, both of these amendmentsto the
Fisher ies Act perpetuated previously exist ing Shirer. .aarr l : l
- i nnq R\/ \ / i r tue of the restr lct lon of net
lengthprofessional f ishermen can only operate 1ega1]y in ei ther
estuaryo r i t s r i ve r sys tem us ing a s ing le 60 m ne t pe r
l i cence '
In 1980, i t was decided that a survey of set net f ishingln
Weflstead estuary and Beaufort In let was required to evaluatet l
re current status of net f ishing in those areas. The surveyob j ec
t i ves were to de te rm ine :
1 . The number o f f i she rmen opera t i ng ( f i sh ing i n
tens i t y ) .
2 . The spec ies and quan t i t y o f f i sh caugh t .
3. The size composit ion of f ish caught in the di f ferentmesh
s i zes be ing used .
4. The success rate as compared to the expectat ion of amateurne
t f i she rmen .
Tfr is survey was planned to coincide with the per iod of
peakrecreat ional usage of these areas by f ishermen and hoLiday
makersancl accordingly was conducted in January l-981 (Caputi
andLenanton, L977), For the purposes of th is report the phrase'Wef
l s tead es tua ry ' pe r ta ins on l y to the es tua ry p rope r (
i . e .no further up the tsremer River than the Narrows' Figure
1)
to
-
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JaluJ lroJneeg (q)
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saruoToC
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secnpo"rd
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spaaJxa.{1"re1nbe.r uoT+€JodEne snqJ 'MoT Jar{+eJ puE JeTnbaJJT
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uorfen+rs^6Jaue MoT e aq o? parapTsuos sr qlnou paJa+1ar{s aL{+
Jo +ueuuoJTlua lecTS^I-{d aq1 pue Terrel Eas oloqe u T 'ec
spM
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spJoceJ Tefuaul?Jeda6 'd"renue1 uT seM +T I-{JTI-{M ua+s^s
pasoTc
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'(1 a.rn6rg) qlnou eq1 JEau
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ujo,rg: 1,rede (u 9'o 'eJ ) T861 .r{.renue 1 uT MoITer{s
^I€^rJeIar
s€M pue ETIeJlsnV uJelsaM ur sJaq?o qlrm pa;eduio3 (pq ort)
Tleus alrnb sT (Z pue T saxP1d) ^Jenlsa peo+slleM
d"renlsa pea+sTTeM (e)
SV]UV ,\]AUNS ]HI IO NOiIdIUIS]O II
'e+ep ^'lrurlES roJ ldacxa (Z
a,rnbrgl a..\eC MoTteMS uorJ JaATr uMop "rel1g dnurlTed eqf
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sJaleM TTe 01 sure+Jad ,13TuI lJoJneag, aseJqd eql s€ereqM
-
o p e n i n g p r i o r t o t h e s u r v e y , i t s b a r r i
e r s a n d b a r w a s c u L b y
t h e r i s i n g r i v e r i n J u f y 1 9 7 8 a n d r e m a i
n e d o p e n t o t h e s e a
f o r 1 0 * e e k = , S i n c e t h a t c f o s u r e , f l o o
d w a t e r s b r o k e t L r e b a r
o n 2 3 J a n u a r y I g a 2 , a n d i t c l o s e d a g a i n
o n 1 0 S e p t e m b e r '
1 9 8 2 . o t h e r c o m p l e t e a n d p r e c i s e r e c o
r d s o f i t s o p e n i n g a n d
c l o s i n g a r e u n a v a i f a b l e , b u t l o c a l k n
o w l e d g e s u g g e s t s
that i i breaks through about once every 3-1* years, and
remains open to th ie sea for a few weeks to a few months '
Despi te the larger catchment area ' a much larger runof f
and
r i v l r f l o w i s n e e d e d t o c u t t h r o u g h t h e
O . 4 k m l o n g s a n d b a r
w h i c h h a s a n a p p r o x i m a t e h e i g h t o f 3 m a
b o v e s e a l e v e 1 . T h e
p h y s i c a f e n v i r o n m e n t o f t h e o c e a n i c s
i d e o f t h e b a r i s a
i t i g n e . r " " g y s i t u a t i o n ( L e n a n t o n , p
e r s . c o m m . ) . A h y p e r s a l l n e
envi ronment usual ly ex is ts in the estuary in the surnrner( n
p p e n d i x 4 ) . T h e s u r f a c e s a l l n i t y r e a d i n
g s f o u n d a tgeaufor t In le t dur ing th ls survey, downr iver
f rom Yate Rocks( F i g u r e 2 ) v i z , 4 5 - 4 6 % a w e r e w i
t h i n t h e r a n g e o f v a l u e s f o u n d
o n p r e v i o u s s a m p l i n g o c c a s i o n s ( L e n a
n t o n p e r s . c o m m . ) .W h e n t h e s y s t e m w a s c l
o s e d i n t h e p a s t ' h i g h s u m m e r
evaporat ion has somet imes contr ibuted to tLre deaths
o f i a r g e n u m b e r s o f f l s h ( e . g ' 1 9 5 3 , D e
p a r t m e n t o f F i s h e r i e s
a n d W i l d l i f e r e c o r d s * ) . G e n e r a l f y , t
L r e s e m o r t a f i t i e s h a v e
b e e n p r e c e d e d b y a d e t e r i o r a t i o n i n f i
s h c o n d i t i o n ( u l c e r s ,
f i s h s w i m m i n g a t s u r f a c e v , i i t - h m o u t
h s g a p i n g ) d u e n o d o u b L t o
t h e c o m b i n e d e f f e c t s o f h i g h s a l i n i t y
a n d t h e l o w d i s s o f v e d
o x y g e n l e v e f o f t h e e s t u a r y w a t e r . I n t
h i s r e g a r d i t i s
i n t - r e s t i n g t o n o t e t h a t i a l t i n r . l p w
a s f o r m e r l y c a l t e d S a l t
R i v e r ,
D u r i n g t h e s u r v e y , t h e w a t e r l e v e l f , e
l 1 o . 3 m a n d i t scol -our was a uni form t ranslucent
brown.
F i l a m e n t o u s a l g a e a n d s e a g r a s s b e d s p
r e d o m i n a t e d i n
a r e a s s u c h a s M u l l e t t s a y ( F i g u r e 2 ) , b
u t d i d n o L h a m p e r b o a Lpassage t l . rough the estuary
or up r iver . Abundant cofonies
of the tube worm, t r lezc l enel la enlgm(t t ) ca were
encounteredt h r o u g h o u t t h i s r i v e r s y s t e m a t ,
a n d b e l o w , w a t e r l e v e l
a long the shore l - ine and on sunken branches-
I I I lvlETHODS
( a ) F i e l d i n f o r m a t i o n
A b o u t 2 w e e k s w e r e s p e n t i n e a c h a r e a , j
n t e r v i e w i n gs e t n e t f i s h e r m e n a n d s a m p l
i n g t h e i r c a t c h e s . T h e f i r s tand th i rd weeks
were at WeI ls tead estuary and the secondand four th weeks were at
Beaufor t In le t . Dur ing the weeksi n r e s i d e n c e a t e a
c h e s t u a r y , i t w a s b e l i e v e d t h a t a 1 lc a c c
h e s w e r e s a m p L e d d a i l y . H o w e v e r , d u r i n g
t h e p e r i o d s o fa b s e n c e f r o m a n e s t u a r y , t
h e o n l y c a t c h d a t a c o l l e c t e d f r o mr l - \ a n
6 , r a n a r \ \ / r h . r e a n ^ r t i c q . r ^ r h o r r n l r
r n t e e r e d t o k e e n r e c o r d sy u r v r ! r
f o r m e . T o m e e E a s m a n y p a r t i e s a s p o s s L
b I e , e x t e n s - i v e u s ew a s m a d e o f l h e B r e m e
r B a y c a r a v a n P a r k H o l i d a y R e g i s t e r a sw e
l f a s r e g u l a r v i s i t s t o c a m p e r s , c a r a v a n
e r s a n d l o d g e r sboth in Bremer Bay and around Beaufor t In
le t . At the
" r , l " ao t / la
7 2
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01 uo sleeqs pTaTJ q6no-r u:o.r 3: peqrJssueJl eJeM elep eqJ
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Iq(l[rltuoTJeuJoJur eq1 1eq1 JepJo ur uorleool burqstg aq; (a)
: lqbnos seuuorleuJoJur Teuorlrppe 6urmo11o;i eq1 s?au "rreq1
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(ur) qf6uaT
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!rdus d r-,{J (,r,
. r^ ,h"-I -1\+\rsu qJcd /\q asn JoJ papueluT slau Jo Jequnu aqJ
(q)
' ,{lred aql uT uaureLlsTJ leu Jo Jaqunu aL{I ( e )
:d+Jed qoea uoJJ pa+sanbal seMuorleuJoJur EurMolIoJ eq1 uaqJ
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seM (9 xrpuaddg; {e^Jns aql Jo sa^r1ce[qo aq1
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-
1 .
U s e o f t h e w o r d ' f i s h ' f o r W e I l s t e a d e s
t u a r y m a y i n c l u d e
b l u e m a n n a c r a b s . S e t n e t s a r e d e f i n e d
a s g i l l n e t s w h i c ha r e f e f t i n a s e t p o s i t i
o n t o f i s h f o r a g i v e n p e r i o d ' I tshould be noted
that data f rom 60 m nets set overn ightwas used to ca lcufate the
catch rates of amateur netse x c e p t f o r T a b l e 6 w h i c h
c o m p a r e s c a t c h e s o f 3 0 m n e t s f r o md a y l i g
h t s e t s . I n T a b l e 3 , % e d i b l e f i s h i s c a l c u
l a t e d a st h e p r o p o r t i o n o f t h e t o t a l e d i b
l e f i s h ( t h o s e m a r k e d b ya s t e r i s k ) f r o m t
h e t o t a f n u m b e r c o u n t e d f o r a l l s p e c i e s.
. . \ m h i n c d A h j . r h n r n n , r y . F i n n n f f i s h c
o r r n t e d f o r e a c h- r r r v r 'e n e r - i o q r ^ r a q a
l q o m e a S u r e d .
S t a f f a t t h e W . A . M u s e u m a s s i s t e d w i t h
i d e n t i f i c a t i o no f t h e f i s h s p e c i e s a n d t
h e i r d i e t a r y i t e m s .
IV RESULTS
N e t f i s h i n g i n t e n s i t y
l a , w e j t s l e a o e s L u d r y
Tf ie number and status of hol iday ing par t ies encountered
ine a c h e s t u a r y i s p r e s e n t e d i n F i g u r e 3 . o
f t h e 4 4 3 p a r L i e s
met at Wel ls tead estuary, tour is ts outnumbered res identsb y
4 8 : 1 , T h e r e w e r e 2 9 p a r t i e s ( 6 % o f t h o s e m
e t ) w h o u s e ds e t n e t s i n t h e e s t u a r y f r o m 3
- 2 9 J a n u a r y , 2 7 o f w h i c h w e r et o u r i s t a n d
2 w e r e l o c a l r e s i d e n t s . N e t f i s h i n g p a r t
i e sh a d 1 - 3 n e t s w i t h t h e m w h i c h t h e y u s u a
l l y s e t o n c e o r+ L i ^ 6 1 r ) ^ d 6 1 - 2 t r ' : r . ' o
r . : a i n . r j 1 f i m e s ) d r r r i n r r ' i h ^ i rr o r r
l l e r
s t a y ( T a b l e 1 ) . T h e d i s t r i b u t i o n i n T a
b l e I i sp o s i t i v e l y s k e w e d b y b h e f i s h i n g
a c t i v i t y o f a s i n g l ep a r t y w h i c h s e t a n e t
2 6 t i . m e s . I f t h i s i s e x c l u d e d f r o mF l r 6 ^
r ' l a r r ] = * . i a n c . ' \ + 2 7 q F t q n o 7 . n F r ' l -
\ / - q f a vu v v v !
ob ta ined i s p robab ly a be t te r es t ima te o f ne t f i
sh ingi ^ l - a h c i l - \ ' T h a . l i q + n i l i r r + i n n n
f f i c . h i n n - C F . \ r f h r r m c q hf I I U c ' r o r u y
. v r J - r r l r r v
s i ze fo r WeI l s tead es tua ry i s compared w i th tha t o
fBeau fo r t I n le t i n F igu re 4 . Tab le 2 shows usage o fd i
f f e ren t mesh s i zes a t t he va r lous s i t es i n eache q t
r r a r i n e s v s t e m a n d l h a n r c l n ^ r t i o n o f n e
t S W i t hu n d e r s i z e d m e s h . I n W e l l s t e a d e s
t u a r y , n e t f i s h i n g w a sc o n c e n t r a t e d a t s
i t e s 1 7 ( 2 9 % ) , 1 5 ( 2 2 % ) a n d 1 2 ( 1 8 % )( F i g u
r e 1 ) . 8 5 % o f f i s h e r m e n u s e d n e t s o f 7 6 n n n
m e s l r .o r l a r g e r a n d 1 5 % u s e d u n d e r s i z e d
m e s h ( T a b f e 2 ) .
A s f o r e s h o r e a c c e s s w a s n o t a p r o b l e m a
t W e l l s t e a d- c + r r r h \ / = r r o h i r - l e u r : q r
r q c d c x t e n q i r r e l w o a r - h a f t e r n o o n
l / , u v s r r f u
f ^ , r r f ^ h F i < h i n a a r - l - i r r i l - \ / f r .
r m \ / e n l - a . 1 F n - \ ' i n f q ^ n . lr r J , r r r r l j
v j ! a v t t r' i n l - a n a o n F h r r + i a q r a F r r n n i
n r r f n o m s e f l - i n r r I - h e i r: ' r v u r U L } J uh 6
l - c F n l l n u r i n a n r o a F i n r r e a n d I - h F h : n d
i n n r r r t o fr v r r v v v r r r v 9 r L U U r r l Y r
t h e l e t t e r o f i n t r o d u c L j o n , ( A p p e n d i
x 5 ) a n a r r a n g e m e n tt o s a m p l e t h e c d t c h o n
b h e f o l l o w i n g m o r n i n g w a s m a d ew h i c h w a s
f e a s t d i s r u p t i v e t o t h e n e t o w n e r . o n d a y
sw h a n n n l r r . a f a w n o f q r ^ r a n c q c i i l : r n r
a q o f 1 - a n n n e s i l - r I cv ! r r u r r v , r ! . ) ,
t o c o l l e c t a l l t h e i n f o r m a t i o n r e q u i r
e d b u t o nb u s y d a y s w h e n d i n g h i e s w e r e I a n
d i n g s i m u l t a n e o u s l y2 + . l i f f ^ r ' ^ n t n l ,
a c A q n n l r r : . . r r r r ' + h \ / q n e c j e S W a S! r g
r r v y r s v ! r t v L L L J
p o s s i b l e .
t4
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errsq .rsu vYrr
sJar.{Jo 1eq1 os rlcleJ Jroq+ }Ipos o+ 'd"r.rnq € ur louaJaM oqM
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'z
-
t r e n d w h - t c h m a y h a v e b e e n p r e s e n l , t h
e m e a n a n d r a n g eof ind iv idual catch rates over consecut
ive 3 day' i n ' t - a r ^ r ra l < r ^ re ra n l a1 -J -a , . 1
i n t r i n r r r - A Max imum CaLChv r ! r ! P r v !Y ' i l - a q
r . r a F c h i r r h F r a a r . l i 6 Y . i n ] - h - - t n t h b
u t b h e r e w a su | | r 9 r r ! r
n o s l g n i f i c a n t t r e n d i n m e a n c a t c h r a t
e . T h e d e p r e s s e dmean catch rate about 20 January may
have resuf ted f romi n c r e a s e d a v o i d a n c e o f t h e n
e t s d u r i n g t h e n i g h t b y t h ef l s h i n c l e a r e
s t u a r i n e w a t e r d u r i n g t h i s p e r i o d o ff u f
l m o o n .
W i n t e r f r e s h w a t e r i n f f o w l n t o t h e e s t
u a r y c o n s i d e r a b l yr a i s e d t h e w a t e r l e v e
l . T h e a v e r a g e c a t c h r r a t e i n f a t ewinter had
improved to 26 f ish per set f rom datas u p p l i e d b y a l o c
a l f i s h e r m a n ( A p p e n d i x 6 ) a l t h o u g ht h i s
w a s n o t n e c e s s a r i f y r e l a t e d t o t h e i n f f o
w .
( b ) B e a u f o r t I n l e t
S e a m u l l e t d o m i n a t e d c a t c h e s i n t h i s e
s t u a r y a n dc o m p r i s e d 8 4 % o f f i s h c o u n t e d
. T h e y w e r e m o r e n u m e r o u sin catchres f rom Beaufor
t In le t than they were an, ^ r a l l c t a : ^ ^ c + r r ^ n . \
/ . - ^ r r - h o q \ i r - q . i n c d I e r r h e r i ^ . : k e f
s ,
a n d b l u e m a n n a c r a b s w e r e a b s e n t f r o m c
a t c h e s ( T a b l e
3 ) , A t o t a f o f L 6 1 6 e d i b l e f i s h w e r e c a u
g h t ( T a b l e 5 )w h i c h w a s e q u i v a f e n t t o a r e
m o v e d b i o m a s s o f 5 7 2 k g o ff i s h b a s e d o n m e
a n w e i g h L s ( T a b l e 3 ) . T h e a v e r a g eo v e r n i
q h t c a l c h r a t e w a s 2 0 e d i b l e f l s h p e r s e L (
7 . 2
k g ) . c i t c n e s r a n g e d f r o m I t o 1 o 4 f i s h p
e r s e t ( T a b f e( t ( ' : f r - h n a t c r j , r f a ^ i ^ ,
r ^ ^ . 1 i h { - ̂ ? d = r , C O n S e C U t i V eJ J '
i n t e r v a l s s h o w e d t h a t n o t o n l y t h e r n e
a n s b u t a l s o t h em a x i m u m s ( F i g u r e 7 ) w e r e
h i g h e r t h a n a t W e f l s t e a d 'S w a l l o w C a v e (
s i t e 3 1 , F i g u r e 2 ) y i e l d e d t h e h i g h e s Lc a
t c h o f a n y s i t e v t z . 7 a 4 f i s h / s e t . A s t h e P
a l l i n u pR i v e r i s o n l y a b o u t 5 o - 7 o m w i d e h
e r e , l t c a n b ec r r h i 6 - f + n r r n f : i r f i q h i r
r . r n r a r - t i c F s . l t c h : c . 2 n - t c l l p i n ns v
u J U U U P r u r v ! ! e
a n a n r { - a r { ^ 1 ^ c a + ^ ^ F l - h a r : n . l k r i f
h n . r l ^ r o f . h - , : 1 l - q . l r h e a F i n a tv l J s r
q u s u u r v J L v v v v v
r - a ^ ] - i ^ j f i c h c a n b e d r i v e n i n t o n e t s
. A l L h o u g hl - h a n o l c n r 1 / h o n F l a a : 1 m a c h
c i z e a r r c f a l i q t ^ n . c ^ n F n lL " u j u L
( s O m ; s u c h a p r a c t i c e c a n e f f e c L l v e l y
t r a p m o s t o ft h e f i s h o f v u l n e r a b l e c a p t u
r e s i z e f r o m t h a t t r a c t o fr i v e r u s i n g t h e
s e m e t h o d s . r t i s n o t k n o w n f l o w1 ^ r i . i F q
n r c ^ d f h i s n a n t i ^ r r l : r n r a { - l i r - c i e n O
r h O w o f t e n i Lw r s r J P ri < r - n c a l - d h r r t r
r n a f h i n f l i q c F r l . a i n - t h e l e l L e r o f
L h e L a w i s u p h e l d w h i l s t i t s s p i r i t i s d
e f e a b e d ' T h u sf i s h s t o c k s h e r e a r e m o r e v
u l n e r a b l e t o c a p t u r e a n d
1 - i h l e t n l n n a l i z a d r - l a n l 6 f i . 1 n I - '
1 r a m 2 f a r r r . c l qr " v t L r u r u u P e s v 4 u v r v r
r
+ h a n i n r ^ ' i . l o ^ n A l ^ t c o f l h e r i V e r o r
L h e e s t u a r y . I t i sr t i F f i n r r ' l + t ^ . ' - 1 m
n i r . ^ f h a - f f i . - i F n . v o f c l i f f e n e n t s i z
e d
m e s h i n c a t c h i n g b l a c k b r e a m b e c a u s e t
h e r e w e r e t o o f e w
s e t s i n m o s t m e s h s i z e c a t e g o r i e s .
D: r r l i nh l - aa t r - h ra i - oq h \ / 76 mrn r . ono f i
I anen t ne t sh : \ / a l - \ a -n r . nmn ; r r cd , a+ +L r . !
I i nhF l r z f i
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sor.rc6elec qseu, rrE'3.:j"3lio"l.::H::;'$"rX::;
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ur uJurJaqsrJ Jnalpue rlq fqbnpc se rcads elqTpa 1ue1'rodur
eJou ar-{J 3o uorltsoduloo azrs aqI ' .,{ 1 e rr r 1 c a d s a J
?eTuTlJoJnee8 pue ^Jenlse pPalsTIeM uL pasn sazrs qseu ]uaJaJJ
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-
( d )
c m T . L . ) t h a n t h o s e a t B e a u f o r t I n l e t (
m o d e 2 8 c m
T . L . ) . o n l y I f i s h c a u g h t w a s b e l o w t h e
m i n i m u m l e g a l
s l z e ( T a b l e 1 1 ) . r n b o t h a r e a s , t h e n u n
b e r s o f f i s h
c a u g h l d e c r e a s e d w i t h i n c r e a s i n g m e s
h s i z e ( T a b L e s
z , e ) e . g . i n W e l l s t e a d 6 3 m m m e s f r u s e d
o n 1 5 % o f
occaslons cal rght 56% of f ish sampled wher- 'as 76 mm
r n e s h ( 5 5 % u s a g e ) c a u g h t 4 0 % o f f i s h s a
m p l e d . N e t s o f
83 mJn or larger mesh d id not capture tLre s ize
range of ye l low-eye mul le t present at the t ime as
e f f e c t i v e l y a s t h e s m a l f e r m e s h e s . Y e
l f o w - e y e m u l f e t
w e r e m a i n f y f e e d i n g o n s e a g r a s s e s c o n
t a i n i n gH g d n o c o c c u z b t a S ) e a i a n d k e n c i
e t t e . L l a e n ) g m a t t c a .
Many of the yel Iow-eye mul1et measured appeared to be
i n p o o r c o n d i t i o n , p o s s i b f y d u e t o t h r
e i r e x p o s u r e t o
s a l i n i t i e s u p t o 6 5 % o . T h e f i s h a f f e c t
e d w e r e c o a t e d
in a heavy secreted s l ime and f in rays were ragged
edged, which may f rave been in response to h igh
s- l i . t i ty . F ish measured exceeded 90% of those
counted
i n e a c h e s t u a r y .
Bf ack bream A cctntho p cLg.zuz butcLtez i Munro, 1949( F T a E
e 5 ; T E 5 f e s 7 , 8 , 1 2 , F i g u r e 8 ) . o v e r a f f ' f
i s h
caught in Wef ls tead estuary tended to be unders ized
whi fs t a greater propor t ion of those caught in
B e a u f o r t I n l e t t e n d e d t o b e l e g a 1 s i z e
d ( F i g u r e B '
T a b f e 1 2 ) . I n t h e f a t t e r a r e a t h e r e w e r
e d i s t i n c tmodes at 22 cm and 29 cm. This b lmodal d is t r
ibut ion
w a s e f f e c t i v e t y p a r t i t i o n e d b y t h e m i
n i m u m l e g a l s i z e
o f 2 5 c m ( T a b l e 1 2 ) . B l a c k b r e a m s t o m a c
h s c o n t a i n e d1 4 e z c i e t e l ) - a e n i g n a t i c a
, m u d s k i p p e r s r t h e s o u t h r e r nanchovy and t f ie
t iny gastropod #. bzctSiez i . In eacharea, the most ef fect ive
mesh s ize used was 1o2 mrn 'o f the f ish counted the propor t
ions which were afsomeasured were loo% at Wel- l -s teacl ar , .d
91% at Beaufor tI n 1 e t .
A u s t r a f i a n h e 4 ! r 4 g t t z z i p i z g e o z g i o
n u z ( C u v . e t V a l ) '
1 8 3 1 l T a b l e s ? J 3 , F l g u r e 8 ) . A 1 l f i s h c
a u g h t w e r e o r
I e g a l s i z e ( F i g u r e 8 ) . T h e m o d a l s i z e w
a s 2 1 - 2 5 c m
T . i . T h e r e w a i n o t r e n d s h o w n b e t w e e n m
e a n f i s h s i z e
and mesLr s ized used, Lrowever i t was obvious that
s m a l l - e r m e s h c a p t u r e d f i s h j u s t a s e f
f e c t i v e l y a s
I a r g e r m e s h ( T a b l e 7 ) . a 1 % o f f i s h c o u n
t e d w e r e
m e a s u r e d .
( f ) C o b b f e r C n i d o g t - a n i z m a c . t o c e p h
a l u z ( C u v . e t V a I ) 'TEZb- - ( t ab les 7 ,8 ,11 ' , F
igu re 8 . i Two d i s t i nc t s i zec lasses o f cobb le r were p
resen t i n WeI I s tead es tua ryc a t c h e s , 1 2 c m T . L . a
n d I a r g e r a d u f t s > 5 o c m T ' L .( T a b l e 1 4 ) .
T h e p r e s e n c e o f j u v e n i l e s a n d l a r g eadul ts
in Wef ls tead estuary suggests that breedingwi th in the system
has probably occurred s ince November1979 when the bar c losed. The
totaf measured catchw a s t o o f e w f o r a c l e a r m o d e t o
b e s e e n . I n c o n t r a s tto Wel fs tead estuary, f ish f
rom the Beaufor t In le t
system were medium s ized wi th a d is t inct mode at 46 cmT . L
. I n l e g a l s i z e d m e s L r s o m e f i s h w e r e c a u g
h t i n 7 6
rnm net but the most ef f ic ient mesh s ize was theunders ized
mesh 63 nrrn in Wel ls tead estuary and 70 mm
( e )
1 8
-
OL
uo11.rodo"rd L{6Tq e 'JseJluoc uJ 'slau ?es ^Jenlsa peelsTlaMuT
paralunocue saTlred Jo Jequnu Tefo? aql Jo %9 dTuo
'v
SNOISNI]NO] ONV NOISSN]SIO /\'eJTTpTTM pue sstJeqsrc Jo
:lueulredao
€L{f qrlrrq
-
B .
7 3 % o f p a r t i e s s e t n e t s a t B e a u f o r t I n l
e t w h i c h c o n f i r m e dl L : + n a l F i c h i n ^ u , :
< I - h o m n < 1 - n n n r r ' l : n n a n r a r r i ^ n a -
i i U i f \ /
u n d e r t a k e n t h e r e . F i s h i n g i n t e n s i t y
( n u m b e r o f s e t s i n t h es r r r \ / F 1 / n e r i o d )
w a s a b o u t t h e s a m e i n b o t h a r e a s . T h em a j o
r i L y o f p a r t i e s r e L w e n e f o u r i s L s ( F i g u r
e 3 ) .
F r q h r r r . r - F r ^ T i F q ' r q | , a | l v c , e ] - l
- n p r r . F j - q . r n C e t O t W i C e a t
Wel l s teac i es tua ry bu t tw i ce to th ree t imes a t Beau
fo r t I n le td e n o n . l i n - r e . n - . r c r . r h a | . \
n 1 n r . r I o n n I h e r s t a r r 9 6 l i n t h e a r e a .
T h e d i s t r i b u t i o n o f m e s h s r z e s u s e d r e
v e a f e d t h a t 7 6 m m w a sm o s t o f t e n u s e d i n b o
t h a r e a s a n d t h e r e f o r e t h e m o s t p o p u l a rm
e s h s i z e ( T a b l e 2 ) . l \ e x t m o s t p o p u l a r m e
s L r s i z e w a s 8 3mm. Combined data on net t i .ng f rom both
areas has shown thata 7 % o f n e t s s e t w e r e o f l e g a l s
i z e ( 7 6 m m - 1 f 4 m m ) a n d 1 3 %w e r e o e l o w 1 e g a
1 s r z e m e s h ( 5 / m m - 7 0 n r n ) . U s e o f i l l e g a
lm e s h w a s a b o u t t h e s a m e f r e q u e n c y i n e a c
h a r e a ( T a b l e 2 ) .
C a t c h e s o f d i f f e r e n t s p e c i e s
F r o m f a b l e 2 a n d F i g u r e a , i t i s a p p a r e n
L L h a L L n e r . t s a g ef n e n r r a n n ' z o f r l i f f a
n a n l n e s h S i z e s W a S e S S e n t t a l l v s i m i l a
n
f o r t h e t w o e s t l r a r i e s o v e r t h e p e r i o d
o f t h e s u r v e y .T - l F r c w a s r r e n e r a l I v l i L
b l e d i I f e r e n c e i n l a ^ r - i i ' i r - \ /a n d f i e
. n i n n c f f n r F . \ . L h a q . c . i e q r - ^ r r f l h l O
L h e r f a c t o f ss u c h a s d i f f e r e n c e s i n w a t e
r c l a r i t y a n d s a l i n i t y w e r et h e r e f o r e c o
n s i d e r e d . D i f f e r e n c e s w e r e f o u n d i n :
( i ) q n F . ' ; e q . l i \ / F r q i 1 - v - 1 - h a r ^ a u
r : q : h i n h a n r ' l i i , a h c i + ! 'l n W e l l s t e a d
e s t u a r y ( 1 6 s p e c i e s ) c o m p a r e d w i t hR e a r
r f n r r T n l c . r ( 7 q . a . i a q ] '
s - L z e c o n p o s r L i o n ( s e e F i g u r e 8 ) ;
c a t c h r a t e s .
( i i )
( i i i )
T h e t o t a l n u m b e r s o f f i s h c o u n t e d f r o m
e a c h s y s t e m f o rs p e c i e s m a r k e d ( t ) i n T a b
l e 3 s h o u l d o e c o m p a r e d . T h ed r f f e r e n t c o
u n t s m a y r e f l e c t r e a l d i f f e r e n c e s f n a o u
n o a n c eo f f i s h n o n u l a l - . i o n q i n l h e r u , r
l q \ / q i F m q n r . \ n ^ h l r r = q a r a q r r ' l +
of recrur tment f rom the sea and are most l ike ly re lated
tothe recent envi ronmenta l h ls tory of each system. Theh r s t o
r y i s m a n i f e s t i n t h e s e a s o n a l t i m l n g , d u
r a t l o n a n dr n t e r ^ v a f o e L w e e n c o n s e c u t i
v e o p e n i n g s o f t h e b a r s ( A p p e n d i x2 ) 1 n r e
l a t i o n t o t h e a v a i l a b i l l t v o f r e c r u i t s f
r o m t h eo c e a n .
In the above comparrson of numbers of f ish caught in eachs y s
t e m . D I a c k b r e d - n w a s d e l i b e n a L e l y e x c l
u d e d . ' I h i s w a sbecause the mean length of bLack bream
taken by 76 mm mesh( i h e n . | \ / ' n c q h q i - a q F t f r e
c r r r c n l - l \ / F n . \ r r d h + a : l l q P P r v -
n r ' r . a l a r - n r r n : r i q n n ) , . , . r c . s i . r
n i f i r - : n F l r r I : n n a n i h R a ^ r r F ^ F tr u r Y L
r ! "
I n f e t ( 2 7 , 2 c m ) t h a n t h e m e a n l e n g t h o f
b l a c k b r e a m c a p t u r e di n W e l f s t e a d e s t u a
r y . D i f f e r e n c e s 1 n t h e d i s t r i b u t i o n o
fthose mesLr s izes which ef fect ive ly caught b lack bream didn o
t a l f o w a n u n b i a s e d c o m p a r i s o n b e t w e e n L
h e s y s t e m s o f t h en u m b e r s o f b l a c k b r e a m c
a u g h t .
20
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qSTJlpl{1 alooe pe1sa66ns uaaq_ sEr.{ 1I '.{.f rsuolur 6urqsr;:
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ar-{J
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e paMoqs
s+au uu 1.9 fsTTqM 'laTTnur ees JoJ s?au uu 9z Jo leqf
a^oqeIIirlVt srr+er qr+er p€pTaT uJUr O/ pup lnu t9 JO l-lselu
pAzTSJOpUn
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r-lc+PJ eq1 xE ' a' r qseu ( + urur 9z
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ueurJaqsrJ eq1 eleb
--- -*a^-- - AJen+siJ prjir+S L [aM uT qsau uu t9 pezlsJduurr
J(.) dsrr Lcuu L L]
'Suruado aq1 6ur.inp urols^s eq1 Jalue-aJJo ur uleual lou op
qsr; ,ra6"re1 JT pe3npeJ ITeJarles aq upc
. -^? r^/:t -Trr^ 6r'r r^- . rrro6o>cLtJ+cr +ou +e5 puLreu
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TTeurspue saTJen+sa aL{1 aleeT 01 aTqe aJE laIInuI abJeT ar-{1 Jo
+soru
'suaoaeq srq+ ueqM 'Jeqpl-res JarJJeq eqf Jo qcEaJq e uo
+L]dFrL]dLrsP ^ L\ase LJ - L r\\,s, '+5e dL.{+ u !11+ Lf' 1r L+J
L4+> 5err ! L F,usspaarq qcTqM 'ureaJq r1cETq ueq+ Jaq+o sarcads
:{q 6ut>1co1s-ag
'q+nour ^renlse aL{1 Jo uorJecoT paJefTeqs aJour aq+ ^q
^IabJeTpau.ranob sr uJnJ uT feqf puE ees eqf o+ uedo paureulaJ
,^^,,, , ̂4,,^ -^JcrtJ:jd pee+s L LdM qCTI-lM JOJ Sqluotu 9 L JU
LtJ1\.1d+u L -{drJu(J L
eL{1 sloaTJaJ ^TqeqoJd 6urltqm e6,roag bury 1ua1xa rasseT e01
pue 6u1;,raq LrprTeJJsnV '1a{cef Jar.{+eaT paurds-xrs se qons
saTcads aurJeu Jo eoueuTuopard aq1 'dJenlsa peelsTTaM uI
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-
D .
of f ish at that t ime, the level of usage found at Wel
lsteadestuary exerted a moderate pressure on some speclesand a
signi f icant pressure on otfrers over the sunmerperiod. l4hi lst
winter catch rates indicated that adeplet ion of f ish stocks did
not occur (ApPendix 6) 'tn l importance of the closed area up r
iver of the Narrowsshould not be underest imated. I t serves as a
refugefrom net f ishing for some of the f ish dur ing the
summerperiod of extensi-ve nett ing in the estuary, and not
onlyhelps to ensure f ish catches in the fol lowing tour ist
season
tprbvided the bar has not been broken ln the meant ime) butalso
al lows l - ine f ishermen to at tempt to catch black breamwithout
compet i t ion from nets.
Poss ib le sou rces o f b ias
Those sources of bj-as which may have affected the est imat
ionof the l -evel of net f j "shing ln each area incfude:
(a ) The poss ib i l i t y t ha t ca tches m issed i n one a
reawhen the of f icer was in tLre other area were nottypical of
catches examined.
(b ) The poss ib i l i t y t ha t f i sh ing ope ra t i ons were
a l sovery much greater dur ing such absences.
(c) The l ikefy reduct ion in f ishing ef fort by residentf
ishermen dur ing this per iod due to the presenceo f t he o f f i
ce r and tha t o f t ou r i s t s .
(d) Thre exclusion from samples of iL legal professionalnight
net f ishing operat ions of short durat ionwhich woulci not have
been detected and which areal leged to have occurred once or twice
dur i 'ng thesurvey.
Vi REC0r' l t ' IENDATI0NS
Although they are beyond the scope of the str ict object ivesof
th is survey I wouLd nevertheless l ike to make somerecommendat
ions :
A. Wel lstqad estuary
1 . Tha t s rgns be p faced a t va r i ous s t ra teg i c s i t
es 'to fami l iar ize the net f ishing publ ic wi- th regulat
ionswhich apply to net f ishing. Those regulat j -ons of tenabused
were }egal length of net and mesh size andthe required distance
apart for sett ing nets.
That the ban on net f lshing up r iver of the Narrows(i ' i
rnrre q ) nemain in f orce and that the exist ingsign be replaced
with a Department of Fisher j-esanO wi l -dt i fe s ign to
communicate the condit ion ofthe c losu re .
2 .
22
-
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' rlndec 'N JN ueTor+sr+e1s Jno ^q paJedeJd sure.r6o;d .relnduoc
uro.r 3:srsdTeuE e+ep pue saTqe+ 'sa;n6r3:
Jo uoTlEJedaJd qlTM pefsrssesJaTIes 'J, ss Tl^tr pue urdneS 'yi1
;y1 'suials..{s auTJpnlsa qloq
uo uoTleuJoJur Tecrs.Kqd pue lelopcaue patlddns peslsTTaM '8
JL\lpue qsJeyrtr 'c JN '^Jnf 'v sJW pue JN 'uu16pog 'd'E Jc
pue 1.roda; eL{1 pezTcrlrJc ^Talr?cnJ+suoc {cocueH 'v'o Jcpue
uebJoN 'c Jc 'uolueueT 'u JN 'saTceds 1a{setJal-{leaT er{l
parJTfuapT suTqclnH ^JJ€g pue sqceuo+s qsTJ uT euneJ
ueosnTTotuparJr+uepr dTpul>,1 unasn6 'V'M aI-{1 Jo sTTaM 'J Jo
'uorssruuad
Jreql qlrm pacnpoJdal pue sqde.rOoqoqd lerJae uo peseq 'pTaT.E'u
Jc Jo uolssluuad ^q peTTddns lueuuoJTlug pue uorlelJesuoc
Jo luaurlJedec aq+ .{q ^qdeJ6of.rec 1eu16r.ro uo paseq aJ-aM z
pue
I seJnbrd 'umop ua{oJq seM auTu uer1u s^ep TeJaAas JoJ
aTcrqo^Jreq+ Jo ueoT aql JoJ TTeqcJng TeqosI pue ua)l JeTncTlJpd ur
puesarlrlrlce 6utqs13: JTaql uo uoTleuJoJur ITnJ paprloJd
dI6urTTrM
pue saqclec uMo Jrel{l Jo +uauaJnseau ar{+ L{1rM pelsrsse
oI-lMuauJeqsrJ pue eldoad ltueur aq1 {ueq1 ^TeJacuTS o+ etrT pTnoM
I
Sl-Nlt^ll90lll40N)lV I I l\'dolenap uorleTdap ua6.,txo puE
{lrTesJad-{q Jo suor+rpuoo
ucqltI /\+ !- L e+lr()ru qDTq e qlTM psua+eaJql aJe slco?sueqm
aJeq qsTJ o+ uauJaqsTJ TeuorssaJoJd lrur-rad o.1, ',
'sesod,-rnd uorlcedsur JoJ ssacJe pue s+au^q paqsrJ eq 01 JaAaJ
el-{l Jo +Jed sMoITe sseTar{+Jalau
aJnsoTc e JoJ uo!+rsod srql Jo ecToq3 aI{I '{sTJ
JcLrrJL+Jcq +c sq ()+ relrJ+cr +gIIJI lJoJneeg LIT
pazTsJepun aJeM qcrr-lM Jo %L 'ureeJq IseI€ 'ueuJeqsrJ
leu uoJJ ebn3:a"r e r1+TM s>1cols qsrJ apTAoJd 01pue JanrJ
aql Jo 1;ed -remo;.reu srql ur 6urqsrg:
fou Jo acuaJJnoco aq1 luanaJd 01 (g aJn6iJ ) peousIJeE Jeded 3:o
;e/\rJdn pauueq eq 6utqst3: +au feqJ, 'z
' aJoqseJoJ uels^s dnur T Ted ar{fpunoJe salts cr6aleJqs 1e
paceld aq burqsTJ 1au6ulu,razrob suorlelnba,r eql bur^pTdsrp su6rs
1eq1 'T
laluJ lJoJnesg's
-
VI I i REFERENCTS
E d z w a l d , J . K .i -n recent
Capu t i , N .G . and Lenan ton , R .C ' J . (L977) ' A su rvey
o f t he
recreat ional usage of the ^south , ,coastal estuar ies of
Wes te rn Aus t ra l i i ' F i zh . f ?ep i ' ' l ez t ' Auz t '
27 , L -4L '
a n d O ' M e 1 i a , C ' R . ( l - 9 7 5 ) . C l a y d i s t r
i b u t i o n s
estuarr -ne sedrments . C)-ay and C lay lY i inenal -z
Z ) , J Y - 4 4 .
H a s s e l L , W . R . B . e t a 1 . ( 1 9 7 8 ) . S o u t h C
o a s t F i s h e r i e sParl-iamentary Study cornmittee Report
'
Lenan ton , R .c . J ' ( rg71a) . F i sh and c rus tacea o f t
he wes te rnAustral i -an south coast r ivers and estuar les'
Fizh'13u l ) - , r , l ea l ' Auz t , 1 ) , L - t7 .
21
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N\N.\Fh gSgoRS
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x,"a^saa.\E6Fo\6^a,cF c) O it ^ < ct, n .- c) < ^
F!clFF.^^.5t!'^Fc sr (rtO n Fc O A Fo o O FO F O o Hc F oE O O fn
c! o !r < a a c Ft a e F! o x olr < d d 4 lro o a 6t d F o d
Ii'llD ilrr$ts'.PoirFo^.noEotstsntoatDaFoot!!En tshFt nrt h t !t t
l! n I ctFF,Ft< tsF o oFrno too rG o n F.:t F
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o. Fartooc.roE*o o 0q o 'E o ar F I t4 t /tDo.rlnFaCOOoFro|n!r
-
T A B L E 4 . D a i l y n e t f i s h i n g i n W e l l s t e a
d e s t u a r y ' J a n u a r y 1 9 8 1 .
DATEEDIBLESPEClES
NETFlSHlNGPARTIES
NETSSET
NUMBER OF FISHCAUGHT PER SET
S I Z E S O FMESH USED
0 5 0 1 8 1
0 6 0 1 8 1
0 7 0 1 8 1
0 8 0 1 8 1
0 9 0 1 8 1
1 0 0 1 8 1
1 1 0 1 8 1
1 2 0 1 8 1
1 3 0 1 8 1
1 4 0 1 8 1
1 7 0 1 8 1
1 8 0 1 8 1
- 1 9 0 1 8 1
2 0 0 1 8 1
2 1 0 1 8 1
220187
23 0.181
24018r
260181
270r8t
2 8 0 1 8 1
2 9 0 1 8 1
? ' l
4
1 , 5 8 , 9a a
1 8 , 2 6 , 4 , 9 ' 6 , 3 , 1 7 , 3 2 "
5 , 7 2 , 5 , 1 3 , 2 , 2 1 , 3
6 , 7 7 , 2 1 , 8 , 1 - 2 , 1 , r , 5n
2 4 , t 3 , 2 6 -
2 6
1 0
1 1
2 , t 9
3 , r 5
2 , 1 , 1
1 , 0 , 0 , 4 , 1
7 , 1 . , 6 , 4 , 5 , 2 , 7 , 3 , 2 , 3 , 9
t6c , toc ,rzc7 3 , 2 4 , 2 4 , 5 , 3 , 2 , 2
4 c , o , o
1 1 , 1 8 , 3 , 6
2 , r o4 , 6
4 , 5
7 6 , 8 3
1 6
63 ,83
6 3 , 7 6 , 8 3 , r o 2
6 3 , 7 6 , 8 3 , 1 O 2
6 3 , 1 6 , 8 3
7 6 , 8 3 , r O 2
83
83
83
1 6 , 8 3
7 6 , 8 3
76 ,83
5 7 , 7 6
7 6 , 8 3
1 6 , I O 2
6 3 , 1 6 , 8 3 , r O 2
7 6 , 8 3
7 6 , 8 3
7 6 , 8 3
7 6 , 8 3
7 6 , 8 3
4
3
9
11,
6
7
1
1
3
3
4
4
2
5
1
6
8
2
5
5
4
4
2
T
3
1
6
6
2
1
I
1
1
1
T
4
6
3
4
2
3
1
1
1
2
1
3
1 0
7
8
4F
7 -F.
1-F.
1 -
2 -
F.2 -
5
1 1
8
7
4
4
2 -
2 -
2 -
TOTAL 1 3 r " 1l* " ^ D 89
E x c l u d e s c r a b s ,
Tota l number o f
Catch o f two or
Tota l nurnber o f d i f fe ren t f i sh ing par t ies
encounEered dur ing
u n d e r e s t i r n a t e d d u e t o o f f l c e r ' s
p r a w n s o r i n e d i b 1 e s p e c i e s .
d i f fe ren t spec ies encountered in month .
m o r e n e t s c o n b i n e d .
N u m b e r o f n e t s s e t p o s s i b l y
survey.
absence.
2 8
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pazfs fua.raJJlp dq rqtneoJo (tas tqtlu:arr,o rad 'oN) safer qffec
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-
TABLE 8. Mean f ish catch rates (No. Permesh s izes used in the
Beaufor tdenote catch f rom a s ingle set .
overn ight set )In Iet January
by d l f fe ren t1981 . Bracket s
MESH SIZE (mm) 83/ o706357 89 toz !14
SPEClES
C o b b l e r
King George whl t ing
Black bream
Sl lver bream
Sea mul le t
Yel low eye mu 1 le t o . ) r . J
0 . 5 0 . 1
- u . )
2 7 . 4 5 . O
0 . 1 0 , 5
4 . 0 o . 7
. o . 1
1 . 1
0 . 1
1 4 . 5
0 . 9
Sufthed mean catchrates for edib les p e c i e s
1 0 , 7 2 5 . 6 3 3 , 5 c a . 1 7 . 2 2 8 ( 1 0 )
N o . o f s e t s I J50
32
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I10
12DAYS OF
17 20JANUARY
estuary January 1981t P lo t tedintervals . The number of
C a t c h r a l e s o f e d i b l e f i s h i n W e l l s t e a
d
as mean ! and range I for three daY
samples i.s shown a! the maximum Point.
F i g u r e 6 .
4 6
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.1urod urnurxeurJaqurnu aqJ .sI"AJafuT t(pp aarqf ro1
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S E A M U L L E T
N : 2 3 6 { B R ) -
N : 5 9 5 ( P A ) :
BLACK BREAI,'N = 4 2 ( B F ) N = s 4 ( P A )
COBBLER
N = 1 8 ( B R )t 0
ul t0
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21 34o
16 5 81 Z 5 0 6 2
Y E L L O W - E Y E M U L L E T
N - 47(gR) | { . 68 ( PA)
S I X - S P I N E D L E A T H E R J A C K E T
N : l 1 9 ( B R )
I
38 40
AUSTRALIAN
1 2
HERR IN G
z
l o
G E O R G E W H I T I N G( B R ) N . 2 ( P A )
30 32 34 36
L E N G T H t c m . )
36 40 42
L e n g t h c o m p o s i t i o n o f t h e c o t a l m e a s u
r e d c a t c h o f s e l e c t e d s p e c i e so f f i s h t a k
e n i n a l I s i z e s o f m e s h c o m b i n e d f r o m W e l l
s t e a d e s t u a r y( B R f ) a n d B e a u f o r t I n l e r (
p A r - r ) . M . L . S . i s m i n i m u r nl e g a l s i z e . T
h e M . L . S . f o r c o b b l e r w a s e s t i m a t e d f r o m
a n e q u a t i o nr e l a t i n g f i n l e n g t h t o t o t a l
l e n g t h .
KIN GN = t l
S I L V E R A R E A MN = 1 3 ( B R ) N : 2 ( P A )
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Plate 4. A view of Swal- low Cave,shore lookinq downriver
Pal l inup River( re fe r a l so to
from the oppositeF i g u r e 2 ) .
Plate 5. An above averageWellstead EstuaryBurche 11 .
an amateur net set in1981 by Ken and I sobe l
catch fromin January
5 2
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-
9. No peleon unde! the aqe or' aeventaen ( 1? ) years thall be
entit led
to hold E tlcence. The Councit or 6ny offlqe! may lequire an
sFpllcant
f o ! E l l c c n c e t g f u r n l s h U i ' t h h l g a p P l
i o s t l o n s u c h e v i d e n c 8 o f h i E d a t e
o f E l l th 6a l t o r he sh6 l l th lnk f i t '
10 . A l l cence sha l l en t i t le the ho lder thereo f to
take Eatch o ! t lap f19h
ln u8 terg on a leae lve by means o f a f i sh ing ne t no t
more than seventy yardg
in ]enqth and having mesh not 1e35 than three inches and not
othuerl 'se'
11 . The ho tde ! o f a l i cence eha l1 kePp a t tached to any
f ieh inq ne t uh lch
ls used o ! in tended to be osEd bV h im I f loa t o f no t I
'ess than fou ! inch€s
i n d l a m e t e ! U h i c h s h a l l b e l e q i b l y n g l
k e d a n d k e p t m a l k e d e l t h e r b v p a l n t l n g
blanding or otherlriae etanping qn the float the number of the
l!6enqe held
by such
pe!9on.
12. Fo! the pulpose of testlng the length oP any ftshing net
such nEt Ehall
be me66ured al'ong the colk l ine upon uhich the net is hunq'
The size of the
mesh ehal' l be determlned by lt|eaaurlnq from knot to knot on
the lnslde Df the
mesh trrhen reEdY for use and gtretched so that the oppo8ite
knots on the
al,ternatlve colnets ale ln contact' In the event of the net
belnq dlv the
Fa l t to be meesu led sha l ] be 988ked e l ther ln l resh u 'a
te r o ! in sa l i Uater
fo ! no t less than ten minu tes and the d lnens lons o f the
mesh or meshes o f the
po!ti.on Eo sooked shall theleupon be determlned'
13. No pelgon shsll obgtrust anv uaters o! the paasage of anv
boEt or veasgl
th rough ln o r ac loaa anv ua tere bV the use o f a f l sh lnq
ne t l inEs f loa tg o r 6
boat vegael dEbllE or anv other neans'
14. l lo pei8on ehEll capiure kil l o! destrov or attempt to
captule ki11 or
degtloy anv f19h in the uatels on any legelve by the digchBtqe
o! use of anv
spealgun ll l le o! other firealm uhatEoever o! bv uEe of any
explosive hooJaoever
lgnited or exploded.
15 . Any person ua ing hav ing used o ! be inq about tc use s f
i sh lnq ne t o ! take
f ish in the ua te tg on anv lese lve o t be lng in pogaesg ion
o f a f iBh inq ne t on 6nv
r e s e t v e s h a l l f o r t h u i t h o n d e m a n d b y a
n y o f f l E e r P r o d u 6 e h i 6 l i g e n c e a n d l f
req|l lred by an offlce! pernit such net to be neasured not onlv
as to length but
alEo as to size of mesh and give his name €nd Bddress'
15 . An o f f i ce ! mav Ee lze anv f i sh lnq ne t u lh ich is
be inq r ' iged o ! t ' i i eh he
suspects on reason6ble glounds i9 about to be or has Eeen used
bV a person
uho iE not the hoLde! of a l icence o! uhich does not cornPlv
ulith ot confo tm
to the reqli lementa of thege by-1ar're'
'1?. No pelaon sh6ll at anv tlme uEe a
to attempt to take e6tch o! trap fieh
f ixed engine to take Eatch q! trap o!
ln lratelg on a leaelve.
5 6
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DEPARTMENT OFFISHEFIIES AND \NILDLI FE
r08 Adera'de Te(ace. PedhWesrern Ausr rar ' . 6000
L J
TO VIITO}I IT }lAY CONCERN
T h e p u ! p o s e o f t h i g l e t t e r i s t o i n t ! o d
u c e R e s e a r c h o f f i c e r 'D a v i d l l e a l d , $ r h
o ! r I h a v e a s k e d t o u n d e r t a k e a s t u d y o f t h
es u c c e s s b y a n a t e u r f i s h e l o e l | o f n e t f i
s h i n g i n t h e P a l l i n u pa n d B r e n e r e s t u a ! i
. e s .
B y a d e c i s i o n o f G o v e r n o e n t t h e D e p a r t
m e n t o f F i s h e r i e s a u dw i l d l i f e i s n o v r e s
p o n s i b l e f o r t h e a d n i n i s t t a t i o n o ff i s h
e r i e s i n t h e s e t n o b o d i e s o f w a t e r . I n t a k
i n g o v e ! t h i sr e s p o n s i b i l i t y I d e c i d e d t
h a t I n e e d e d t o h a v e a n u n d e r s t a n d i n go f t
h e f i s h e ! i e 6 i n t e r u s o f : -
I . T h e n u n b e r o f f i s h e t a e n o p e r a t i n g
.