O’ mother where wert thou? Maternal strategies in the southern elephant seal: a stable isotope investigation.
Maternal effects are widespread in ecology and can alter the dynamics of a population. We investigated the impact of maternal foraging strategies on offspring weaning mass-a proxy of maternal foraging success and of offspring survival-in southern elephant seals on îles Kerguelen. Using 4 years of da...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.1062.2077 2023-05-15T14:04:40+02:00 O’ mother where wert thou? Maternal strategies in the southern elephant seal: a stable isotope investigation. Matthieu Authier Anne-Cécile Dragon Pierre Richard Yves Cherel Christophe Guinet The Pennsylvania State University CiteSeerX Archives 2012 application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.1062.2077 http://www.cebc.cnrs.fr/publipdf/2012/APRS279_2012.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.1062.2077 http://www.cebc.cnrs.fr/publipdf/2012/APRS279_2012.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://www.cebc.cnrs.fr/publipdf/2012/APRS279_2012.pdf text 2012 ftciteseerx 2020-04-19T00:21:35Z Maternal effects are widespread in ecology and can alter the dynamics of a population. We investigated the impact of maternal foraging strategies on offspring weaning mass-a proxy of maternal foraging success and of offspring survival-in southern elephant seals on îles Kerguelen. Using 4 years of data, we modelled pup weaning mass as a two-component mixture and used blood stable isotope values to discriminate between maternal foraging strategies previously identified from bio-logging studies. Carbon isotope ratio was a strong predictor of weaning mass, but the relationship was non-monotonic in contrast to a priori expectations. Females foraging in the interfrontal zone weaned pups with a smaller mass compared with females foraging in Antarctic waters. Pup mass was positively correlated with a proxy of global primary production in the interfrontal zone for small weanlings. Maternal effects, via a poor foraging efficiency in the 1970s, may help explain the large population decrease observed at that time on îles Kerguelen because of an overall decrease in pup weaning mass, survival and subsequent recruitment. Text Antarc* Antarctic Elephant Seal Elephant Seals Southern Elephant Seal Southern Elephant Seals Unknown Antarctic Îles Kerguelen ENVELOPE(69.167,69.167,-49.250,-49.250) Kerguelen |
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Open Polar |
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ftciteseerx |
language |
English |
description |
Maternal effects are widespread in ecology and can alter the dynamics of a population. We investigated the impact of maternal foraging strategies on offspring weaning mass-a proxy of maternal foraging success and of offspring survival-in southern elephant seals on îles Kerguelen. Using 4 years of data, we modelled pup weaning mass as a two-component mixture and used blood stable isotope values to discriminate between maternal foraging strategies previously identified from bio-logging studies. Carbon isotope ratio was a strong predictor of weaning mass, but the relationship was non-monotonic in contrast to a priori expectations. Females foraging in the interfrontal zone weaned pups with a smaller mass compared with females foraging in Antarctic waters. Pup mass was positively correlated with a proxy of global primary production in the interfrontal zone for small weanlings. Maternal effects, via a poor foraging efficiency in the 1970s, may help explain the large population decrease observed at that time on îles Kerguelen because of an overall decrease in pup weaning mass, survival and subsequent recruitment. |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
Matthieu Authier Anne-Cécile Dragon Pierre Richard Yves Cherel Christophe Guinet |
spellingShingle |
Matthieu Authier Anne-Cécile Dragon Pierre Richard Yves Cherel Christophe Guinet O’ mother where wert thou? Maternal strategies in the southern elephant seal: a stable isotope investigation. |
author_facet |
Matthieu Authier Anne-Cécile Dragon Pierre Richard Yves Cherel Christophe Guinet |
author_sort |
Matthieu Authier |
title |
O’ mother where wert thou? Maternal strategies in the southern elephant seal: a stable isotope investigation. |
title_short |
O’ mother where wert thou? Maternal strategies in the southern elephant seal: a stable isotope investigation. |
title_full |
O’ mother where wert thou? Maternal strategies in the southern elephant seal: a stable isotope investigation. |
title_fullStr |
O’ mother where wert thou? Maternal strategies in the southern elephant seal: a stable isotope investigation. |
title_full_unstemmed |
O’ mother where wert thou? Maternal strategies in the southern elephant seal: a stable isotope investigation. |
title_sort |
o’ mother where wert thou? maternal strategies in the southern elephant seal: a stable isotope investigation. |
publishDate |
2012 |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.1062.2077 http://www.cebc.cnrs.fr/publipdf/2012/APRS279_2012.pdf |
long_lat |
ENVELOPE(69.167,69.167,-49.250,-49.250) |
geographic |
Antarctic Îles Kerguelen Kerguelen |
geographic_facet |
Antarctic Îles Kerguelen Kerguelen |
genre |
Antarc* Antarctic Elephant Seal Elephant Seals Southern Elephant Seal Southern Elephant Seals |
genre_facet |
Antarc* Antarctic Elephant Seal Elephant Seals Southern Elephant Seal Southern Elephant Seals |
op_source |
http://www.cebc.cnrs.fr/publipdf/2012/APRS279_2012.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.1062.2077 http://www.cebc.cnrs.fr/publipdf/2012/APRS279_2012.pdf |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
_version_ |
1766275883598872576 |