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okinawa islands

Journal of Zoology (1)

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Factors affecting nesting beach selection by loggerhead turtles (Caretta caretta): a multiple regression approach
Akira Kikukawa, Naoki Kamezaki, Hidetoshi Ota
Journal:

Journal of Zoology / Volume 249 / Issue 4 / December 1999

Published online by Cambridge University Press:

27 February 2001, pp. 447-454

Print publication:

December 1999
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Based on data obtained from 3 years' fieldwork in Okinawajima and adjacent islands of the central Ryukyus, Japan, various physical and human-related beach characters were assessed for their relative influence on beach selection by nesting sea turtles using multiple regression analysis. Of the 23 characters considered, sand softness (measured by a specially designed tool) (positive), distance from the nearest human settlement (positive), presence of lagoon (positive), beach length (negative), and beach height (positive) were selected as influential variables in descending order. Explanations were attempted for such results in the light of correlates of these beach characters with natural and artificial factors that are believed to impact the nesting success of female sea turtles.