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Variation in adult annual survival probability and remigration intervals of sea turtles

Troëng, Sebastian LU and Chaloupka, Milani (2007) In Marine Biology 151(5). p.1721-1730
Abstract
We analyzed a large dataset to quantify adult annual survival probability and remigration intervals for the Tortuguero, Costa Rica green turtle population. Annual survival probability was estimated at 0.85 (95% CI 0.75-0.92) using a recovery model and at 0.85 (95% CI 0.83-0.87) using an open robust design model. The two most common modes of remigration are 2 and 3 years. Annual survival probability is lower and remigration intervals are shorter than for other green turtle populations. Explanations for short remigration intervals include reproductive compensation due to historic population declines, availability of better quality food items, favorable environmental conditions, and short distance to the main foraging grounds. Variation in... (More)
We analyzed a large dataset to quantify adult annual survival probability and remigration intervals for the Tortuguero, Costa Rica green turtle population. Annual survival probability was estimated at 0.85 (95% CI 0.75-0.92) using a recovery model and at 0.85 (95% CI 0.83-0.87) using an open robust design model. The two most common modes of remigration are 2 and 3 years. Annual survival probability is lower and remigration intervals are shorter than for other green turtle populations. Explanations for short remigration intervals include reproductive compensation due to historic population declines, availability of better quality food items, favorable environmental conditions, and short distance to the main foraging grounds. Variation in survival and remigration intervals have profound consequences for management and life history evolution. The short remigration intervals of Tortuguero green turtles partly offset mortality caused by turtle fishing in Nicaragua and mean that low juvenile survival represents a more urgent threat to the population than low adult survival. Low adult survival probability could result in selective pressure for earlier age at maturity. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Marine Biology
volume
151
issue
5
pages
1721 - 1730
publisher
Springer
external identifiers
  • wos:000246614300011
  • scopus:34249000431
ISSN
0025-3162
DOI
10.1007/s00227-007-0611-6
language
English
LU publication?
yes
id
347be45b-b777-476e-b727-485ac3699db5 (old id 659374)
date added to LUP
2008-01-02 15:04:59
date last changed
2017-07-02 04:18:30
@article{347be45b-b777-476e-b727-485ac3699db5,
  abstract     = {We analyzed a large dataset to quantify adult annual survival probability and remigration intervals for the Tortuguero, Costa Rica green turtle population. Annual survival probability was estimated at 0.85 (95% CI 0.75-0.92) using a recovery model and at 0.85 (95% CI 0.83-0.87) using an open robust design model. The two most common modes of remigration are 2 and 3 years. Annual survival probability is lower and remigration intervals are shorter than for other green turtle populations. Explanations for short remigration intervals include reproductive compensation due to historic population declines, availability of better quality food items, favorable environmental conditions, and short distance to the main foraging grounds. Variation in survival and remigration intervals have profound consequences for management and life history evolution. The short remigration intervals of Tortuguero green turtles partly offset mortality caused by turtle fishing in Nicaragua and mean that low juvenile survival represents a more urgent threat to the population than low adult survival. Low adult survival probability could result in selective pressure for earlier age at maturity.},
  author       = {Troëng, Sebastian and Chaloupka, Milani},
  issn         = {0025-3162},
  language     = {eng},
  number       = {5},
  pages        = {1721--1730},
  publisher    = {Springer},
  series       = {Marine Biology},
  title        = {Variation in adult annual survival probability and remigration intervals of sea turtles},
  url          = {http://dx.doi.org/10.1007/s00227-007-0611-6},
  volume       = {151},
  year         = {2007},
}