Sampling error for hatchling turtle measurements: Probing a rule-of-thumb

Whiting, Andrea U., Chaloupka, Milani and Limpus, Colin J. (2008) Sampling error for hatchling turtle measurements: Probing a rule-of-thumb. Copeia, 4: 889-896. doi:10.1643/CH-07-194


Author Whiting, Andrea U.
Chaloupka, Milani
Limpus, Colin J.
Title Sampling error for hatchling turtle measurements: Probing a rule-of-thumb
Journal name Copeia   Check publisher's open access policy
ISSN 0045-8511
1938-5110
Publication date 2008-12-01
Sub-type Article (original research)
DOI 10.1643/CH-07-194
Issue 4
Start page 889
End page 896
Total pages 8
Place of publication Miami, FL, United States
Publisher American Society of Ichthyologists and Herpetologists
Language eng
Formatted abstract
Despite the importance of understanding error associated with sampling, there has been a paucity of discussion in many analyses within sea turtle biology. We investigated sampling and non-sampling errors for size measurements (straight carapace length, straight carapace width, and mass) of hatchling Flatback Turtles, Natator depressus, from two study sites in tropical Australia using a priori and post hoc methods. A priori and post hoc methods produced similar error estimates (max difference  =  0.19 g and 0.24 mm), highlighting methodologies that may be transferred for other species without requiring a census of every hatchling in a clutch. The standard practice of sampling ten hatchlings per nest resulted in reasonably low sampling error (upper 95% CI  =  0.9 g for mass, 0.7 mm for straight carapace length, and 1.0 mm for straight carapace width), but sample size may be reduced if less precise size measurements are required. Effort analysis showed that sampling error from a nesting population was minimized when sampling effort was spread over the maximum number of clutches rather than concentrating effort within fewer clutches.
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collection: School of Biological Sciences Publications
 
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Created: Thu, 03 Sep 2009, 19:07:00 EST by Mr Andrew Martlew on behalf of School of Biological Sciences