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Please use this identifier to cite or link to this item: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/25540

Title: Comparable length at weaning in cetaceans
Authors: Shiang-lin Huang;Lien-Siang Chou;I-Hsun Ni
Contributors: NTOU:Department of Environmental Biology and Fisheries Science
Keywords: life history;lactation;maternal investment;weaning
Date: 2009-10
Issue Date: 2011-10-20T08:24:29Z
Publisher: Marine Mammal Science
Abstract: abstract:Weaning represents the transition of mammalian life from maternal dependence to independence in both energetics and behavior. The length at weaning (Lw) is determined by the maternal investment during gestation and lactation. It affects calf survival and impacts on the long-term persistence of species, but the measurement is not readily obtainable for many cetaceans. A general linear model and residual correlation were used to explore the correlations between the published Lw and five other life history traits of cetaceans, including female asymptotic length (Lx), length at birth (Lb), lactation period (LP), gestation period (GP), and calving interval (CI). Lx was a significant confounding parameter on the other five traits. By eliminating the confounding Lx, ANCOVA revealed that baleen whales (Mysticeti) and toothed cetaceans (Odontoceti) had comparable Lw. By residual correlation, which factors the confounding Lx, Lw was significantly correlated with Lb but not with GP, LP, and CI. After Lb was further eliminated, convergent Lw in cetaceans could still be observed. Therefore, we proposed a generic expression Lw= 1.239Lx0.877, which allows us to further estimate Lw of undocumented cetacean species.
Relation: 25(4), pp.875–887
URI: http://ntour.ntou.edu.tw/handle/987654321/25540
Appears in Collections:[環境生物與漁業科學學系] 期刊論文

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