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Please use this identifier to cite or link to this item: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/25530

Title: Correlations in cetacean life history traits
Authors: Shiang-Lin Huang;I-Hsun Ni;Lien-Siang Chou
Contributors: NTOU:Department of Environmental Biology and Fisheries Science
國立臺灣海洋大學:環境生物與漁業科學學系
Keywords: Allometry;cetacean;conservation;life history;lifespan
Date: 2008
Issue Date: 2011-10-20T08:24:27Z
Publisher: The Raffles Bulletin of Zoology
Abstract: ABSTRACT:Life history traits (LHT), profi ling the schedule of growth and reproduction of organisms, directly determine the reproductive fitness and long-term persistence of species. Understanding the characteristic LHT of species is a crucial step in making sound conservation policies. Nonetheless, the complete LHT of many cetaceans is not readily elucidated, primarily due to their strictly aquatic lifestyle, often gigantic body size and long lifespan. In this study, we collected and analyzed six LHT from published literature, including female asymptotic length (Lx), length at birth (Lb), length at sexual maturity (Lm), calving interval (CI), age at sexual maturity (Am) and lifespan (Ax) in order to explore their potential correlations with LHT which determine their maternal fi tness. In a general linear model, strong allometric relationships were observed between Lx and the other fi ve LHT and, with high R 2 , it was possible to extrapolate the Lb, Lm and Ax of undocumented species directly from their Lx. Furthermore, general linear model analysis indicated that the Ax of cetaceans is not only related to their Lx, but also their Am (where Ax = 0.962 Lx 0.435 Am 0.463). When the confounding effect of Lx is factored out, the differences between baleen and toothed cetaceans are valid for Lb and CI but not for Lm, Am and Ax. Based on the signifi cantly different reproductive energetics (capital or income breeder) and the potential ecological differences between baleen and toothed cetaceans, we interpreted the effect of intrinsic and extrinsic factors on LHT allometric regressions.
Relation: 19, pp.285-292
URI: http://ntour.ntou.edu.tw/handle/987654321/25530
Appears in Collections:[環境生物與漁業科學學系] 期刊論文

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