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The extra burden of motherhood: reduced dive duration associated with pregnancy status in a deep-diving mammal, the northern elephant seal.
Hückstädt, Luis A; Holser, Rachel R; Tift, Michael S; Costa, Daniel P.
Afiliação
  • Hückstädt LA; Department of Ecology and Evolutionary Biology, University of California Santa Cruz, Santa Cruz, CA, USA lahuckst@ucsc.edu.
  • Holser RR; Department of Ecology and Evolutionary Biology, University of California Santa Cruz, Santa Cruz, CA, USA.
  • Tift MS; Division of Physiology, School of Medicine, University of California San Diego, La Jolla, CA, USA.
  • Costa DP; Department of Ecology and Evolutionary Biology, University of California Santa Cruz, Santa Cruz, CA, USA.
Biol Lett ; 14(2)2018 02.
Article em En | MEDLINE | ID: mdl-29445044
The cost of pregnancy is hard to study in marine mammals, particularly in species that undergo pregnancy while diving continuously at sea such as elephant seals (genus Mirounga). We analysed the diving behaviour of confirmed pregnant and non-pregnant northern elephant seals (M. angustirostris, n = 172) and showed that after an initial continuous increase in dive duration, dives of pregnant females become shorter after week 17. The reasons for this reduction in dive duration remain unknown, but we hypothesize that increased fetal demand for oxygen could be the cause. Our findings reveal an opportunity to explore the use of biologging data to investigate pregnancy status of free-ranging marine mammals and factors that could affect pregnancy success.
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Comportamento Animal / Focas Verdadeiras / Mergulho Tipo de estudo: Risk_factors_studies Limite: Animals / Pregnancy Idioma: En Revista: Biol Lett Assunto da revista: BIOLOGIA Ano de publicação: 2018 Tipo de documento: Article País de afiliação: Estados Unidos

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Comportamento Animal / Focas Verdadeiras / Mergulho Tipo de estudo: Risk_factors_studies Limite: Animals / Pregnancy Idioma: En Revista: Biol Lett Assunto da revista: BIOLOGIA Ano de publicação: 2018 Tipo de documento: Article País de afiliação: Estados Unidos