Comparing sampling effort and errors in abundance estimates between short and protracted nesting seasons for sea turtles

Whiting, Andrea U., Chaloupka, Milani and Limpus, Colin J. (2013) Comparing sampling effort and errors in abundance estimates between short and protracted nesting seasons for sea turtles. Journal of Experimental Marine Biology and Ecology, 449 165-170. doi:10.1016/j.jembe.2013.09.016


Author Whiting, Andrea U.
Chaloupka, Milani
Limpus, Colin J.
Title Comparing sampling effort and errors in abundance estimates between short and protracted nesting seasons for sea turtles
Journal name Journal of Experimental Marine Biology and Ecology   Check publisher's open access policy
ISSN 0022-0981
Publication date 2013-11-01
Year available 2013
Sub-type Article (original research)
DOI 10.1016/j.jembe.2013.09.016
Volume 449
Start page 165
End page 170
Total pages 6
Place of publication Amsterdam Netherlands
Publisher Elsevier BV
Language eng
Abstract Sea turtles have iteroparous reproduction, migrating periodically from foraging habitat to nesting grounds where they generally lay several clutches at regular intervals throughout a nesting season. The total length of the nesting season depends ultimately on environmental conditions that are conducive to the production of viable hatchlings, and varies from 3 to 4. months to year-round nesting. As with many migratory marine species, the ease of monitoring marine turtles on their nesting beaches opposed to on their foraging grounds, has resulted in a focus of research on breeding females for population studies and provides a useful albeit limited population index. To explore the precision of monitoring regimes to sample nesting turtle populations, we developed theoretical models for 3 1/2-month and 9-month nesting populations. We used individual-based models for tagged animals and parametric and non-parametric models to estimate annual nest abundance for track count data. These simulation models show that seasonality substantially influenced both the length and temporal position of optimal sampling regimes, showing a five to sevenfold greater effort in monitoring required for longer nesting seasons in order to encounter between 83 and 90% of the annual population. The implications for trend detection and inter-annual and inter-species variations are discussed.
Keyword Abundance
Capture probability
Effort
Flatback turtle
Sampling
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: Faculty of Science Publications
Official 2014 Collection
 
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