SENSITIVITY ASSESSMENT A TOOL FOR SPATIO-TEMPORAL MANAGEMENT OF FISHING TECHNIQUES 29 September 2011 World Conference on Marine Biodiversity Jochen Depestele Wouter Courtens, Steven Degraer, Jan Haelters, Kris Hostens, Hans Polet, Marijn Rabaut, Eric Stienen, Sofie Vandendriessche, Magda Vincx Institute for Agricultural and Fisheries Research www.ilvo.vlaanderen.be/wako
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SENSITIVITY ASSESSMENT
A TOOL FOR SPATIO-TEMPORAL MANAGEMENT
OF FISHING TECHNIQUES
29 September 2011
World Conference on Marine Biodiversity
Jochen Depestele
Wouter Courtens, Steven Degraer, Jan Haelters, Kris Hostens, Hans Polet,
Marijn Rabaut, Eric Stienen, Sofie Vandendriessche, Magda Vincx
Institute for Agricultural and Fisheries Research www.ilvo.vlaanderen.be/wako
Question?
Question?
Which fishing gear is the least damaging?
Objective: Develop a tool !
1. No black or white pill can cure
nuances anticipated
Include spatial and temporal aspects
2. No longer see the wood for the trees
few data, but many effects
How to deal with this?
Tool = SENSITIVITY ASSESSMENT !
What?
Existing applications? Range of … ecosystem components
activities
terminologies
But also: APROACHES !
RECOVERABILITY
INT
OL
ER
AN
CE
SENSITIVITY
Roadmap
SCOPING
SPEC. SENSITIVITY ASSESSMENT
SENSITIVITY MAPS
SELECTION OF UNIT OF ANALYSIS un
ce
rtain
ty
Roadmap
un
ce
rtain
ty
SCOPING
SPEC. SENSITIVITY ASSESSMENT
SENSITIVITY MAPS
Assumptions & limitations
1 fishing „event‟
no reference condition
Which marine feature? How?
(1) species within
(2) adult specimen
(3) which species?
SELECTION OF UNIT OF ANALYSIS
Roadmap
un
certa
inty
SCOPING
SPEC. SENSITIVITY ASSESSMENT
SENSITIVITY MAPS
SELECTION OF UNIT OF ANALYSIS
SPECIES FISHING
TRAITS
PRESSURES SPECIES
SENSITIVITY
INDEX
recoverability assessment
intolerance assessment
Intolerance: pressure selection
Be comprehensive: Rio de Janeiro Declaration (1992):
“lack of full scientific certainty shall not be used as a reason for postponing cost-effective measures to