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Lecture 24 - cwo - Sea T ur tl e Conser va ti on Appl yi ng...

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Sea Turtle Conservation: Applying what we’ve learned
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Stage Class Size (cm) Age (yr) Surviva l Fecundity 1 Eggs, hatchling <10 <1 0.68 0 2 Small juv. 10-58 1-7 0.79 0 3 Large juv. 58-80 8-15 0.68 0 4 Subadult 80-87 16-21 0.74 0 5 Novice breeders >87 22 0.81 127 6 1 st -yr remigrants >87 23 0.81 4 7 Mature breeders >87 24-54 0.81 80 Stage based life table for loggerhead sea turtle Crouse et al.(1987) Ecology 68: 1412
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2 3 1 F 5 =P 15 P 21 4 5 6 7 F 7 =P 17 F 6 =P 16 P 32 P 43 P 54 P 65 P 76 P 22 P 33 P 44 P 77 Life cycle diagram : Are we done? Stage Class Age (yr) Surviva l 1 Eggs, hatchling <1 0.68 2 Small juv. 1-7 0.79 3 Large juv. 8-15 0.68 4 Subadult 16-21 0.74 5 Novice breeders 22 0.81 6 1 st -yr remigrants 23 0.81 7 Mature breeders 24-54 0.81 What does “survival represent?
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= 77 76 65 54 44 43 33 32 22 21 7 6 5 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 P P P P P P P P P P F F F A 2 3 1 F 5 =P 15 P 21 4 5 6 7 F 7 =P 17 F 6 =P 16 P 32 P 43 P 54 P 65 P 76 P 22 P 33 P 44 P 77 Transition Matrix :
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= 81 . 81 . 0 0 0 0 0 0 0
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