Growth Rates of Green Turtles (Chelonia mydas) At Several Sites on Hawaii Island From 1995 to 2018 Marc Rice, Laura Jim Sea Turtle Research Program Hawaii Preparatory Academy
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Growth Rates of Green Turtles (Chelonia mydas)
At Several Sites on Hawaii IslandFrom 1995 to 2018
Marc Rice, Laura JimSea Turtle Research ProgramHawaii Preparatory Academy
METHODS:
• SCL USED• MEASURED TO NEAREST MM• GROWTH INTERVALS > .99 YEARS COUNTED• SIZE CLASSES AT 10 CM INTERVALS (30, 40, 50, ETC.) AND A TURTLE
WAS RECORDED AS BELONGING TO ITS RECAPTURE SIZE CLASS• GROWTH RATES CALCULATED AS CM/YEAR• GROWTH INTERVAL DURATION IS NOT CONSIDERED IN THE AVERAGE
GROWTH RATES PRESENTED
LOCATIONS OF TURTLES CAPTURED
Kaloko-Honokohau National Historical ParkHawaii Island, Hawaii
0.6
0.7
0.8
0.9
1
1.1
1.2
1.3
1.4
1.5
1.6
1.7
1.8
40-49.9 50-59.9 60-69.9
Gro
wth
Rat
e (c
m/y
ear)
Size Class (SCL in Cm)Axis Title
Average growth rate (cm/year) plus standard deviation for green turtles captured at Kaloko-Honokohau National Historical Park, Hawaii Island from 1999 to 2018 arranged by
size class.
Overall Mean Growth Rate (cm/yr) 0.77
Kapoho, Hawaii Island
-2
-1
0
1
2
3
4
40-49.9 50-59.9 60-69.9 70-79.9 80-89.9
Gro
wth
Rat
e (c
m/y
ear)
Size Class (SCL in cm)
Average growth rate (cm/year) plus standard deviation for green turtles captured at Kapoho, Hawaii Island from 2000 to 2018 arranged by size class.
Overall Mean Growth Rate (cm/yr) 2.12
Kahalu’u Beach State Park, Hawaii Island
0
0.5
1
1.5
2
2.5
3
3.5
4
4.5
5
30-39.9 40-49.9 50-59.9 60-69.9
Grow
th R
ate
(cm
/yea
r)
Size Class (SCL in cm)
Average growth rate (cm/year) plus standard deviation for green turtles captured at Kahalu'u Beach State Park, Hawaii Island from 1995 to 2015 arranged by size class.
Overall Mean Growth Rate (cm/yr) 1.33
Kiholo Bay, Hawaii Island
-1.00
-0.50
0.00
0.50
1.00
1.50
2.00
2.50
3.00
3.50
4.00
4.50
30-39.9 40-49.9 50-59.9 60-69.9 70-79.9
Gro
wth
Rat
e (c
m/y
ear)
Size Class (SCL in cm)
Average growth rate (cm/year) plus standard deviation for green turtles captured at Kiholo, Hawaii Island from 1980 to 2018 arranged by size class
Overall Mean Growth Rate (cm/yr) 1.38
Hualalai, Hawaii Island
-1
-0.5
0
0.5
1
1.5
2
30-39.9 40-49.9 50-59.9
Gro
wth
Rat
e (c
m/y
ear)
Size Class (SCL in cm)
Average growth rate (cm/year) plus standard deviation for green turtles captured at Hualalai, Hawaii Island from 2005 to 2011 arranged by size class.
Overall Mean Growth Rate (cm/yr) 0.732758621Overall Mean Growth Rate (cm/yr) 0.732758621Overall Mean Growth Rate (cm/yr) 0.732758621
Overall Mean Growth Rate (cm/yr) 0.73
Overall Mean Growth Rate (cm/yr) 0.77
Puako, Hawaii Island
-1.00
-0.50
0.00
0.50
1.00
1.50
2.00
2.50
3.00
3.50
40-49.9 50-59.9 60-69.9 70-79.9
Gro
wth
Rat
e (c
m/y
ear)
Size Class (SCL in cm)
Average growth rate (cm/year) plus standard deviation for green turtles captured at Puako, Hawaii Island from 1991 to 2015 arranged by size class.
Overall Mean Growth Rate (cm/yr) 1.06
Overall growth rates highest at Kapoho for small sizes
Larger turtles not evident at Hualalai, Kahaluu, and Kaloko
FPStarvationOther
FP more a problem E whereas starvation more W HI
Starvation more likely with lower growth rates
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