Women from Venus, men from Mars: inter‐sex foraging differences in the imperial cormorant Phalacrocorax atriceps a colonial seabird
Colonial seabirds are central place foragers and likely to be subject to substantial competition for resources. Mechanisms proposed for reducing intra‐specific competition include differential inter‐sex area use mediated by adult choice. We used GPS loggers and dive recorders to study area use and d...
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crwiley:10.1111/j.1600-0706.2010.18387.x 2023-12-03T10:29:03+01:00 Women from Venus, men from Mars: inter‐sex foraging differences in the imperial cormorant Phalacrocorax atriceps a colonial seabird Quintana, Flavio Wilson, Rory Dell'Arciprete, Patricia Shepard, Emily Laich, Agustina Gómez 2010 http://dx.doi.org/10.1111/j.1600-0706.2010.18387.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1600-0706.2010.18387.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1600-0706.2010.18387.x en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Oikos volume 120, issue 3, page 350-358 ISSN 0030-1299 1600-0706 Ecology, Evolution, Behavior and Systematics journal-article 2010 crwiley https://doi.org/10.1111/j.1600-0706.2010.18387.x 2023-11-09T13:15:52Z Colonial seabirds are central place foragers and likely to be subject to substantial competition for resources. Mechanisms proposed for reducing intra‐specific competition include differential inter‐sex area use mediated by adult choice. We used GPS loggers and dive recorders to study area use and dive depth in a total of 27 male and 26 female imperial cormorants Phalacrocorax atriceps breeding at a colony of some 6500 birds at Punta Leon, Chubut, Argentina during 2004 and 2005. Although time spent travelling and distances between the colony and foraging sites were similar for both sexes, males and females travelled away from their colony using routes virtually perpendicular to each other so that their foraging areas were distinctly different; females hunted close to the coast while males foraged offshore in deeper water. Consideration of foraging efficiency underwater, defined as the duration spent on the bottom divided by the dive cycle duration, showed that females were more efficient at depths < 40 m while males more efficient at depths > 40 m. We suggest that the substantial sexual dimorphism in this species may be responsible for the different depth‐linked foraging efficiencies and that selection for appropriate depths could lead to differential habitat use and putative differences in prey selection. Article in Journal/Newspaper Phalacrocorax atriceps Wiley Online Library (via Crossref) Argentina Chubut ENVELOPE(-62.533,-62.533,-76.100,-76.100) Venus ENVELOPE(-57.842,-57.842,-61.925,-61.925) Oikos 120 3 350 358 |
institution |
Open Polar |
collection |
Wiley Online Library (via Crossref) |
op_collection_id |
crwiley |
language |
English |
topic |
Ecology, Evolution, Behavior and Systematics |
spellingShingle |
Ecology, Evolution, Behavior and Systematics Quintana, Flavio Wilson, Rory Dell'Arciprete, Patricia Shepard, Emily Laich, Agustina Gómez Women from Venus, men from Mars: inter‐sex foraging differences in the imperial cormorant Phalacrocorax atriceps a colonial seabird |
topic_facet |
Ecology, Evolution, Behavior and Systematics |
description |
Colonial seabirds are central place foragers and likely to be subject to substantial competition for resources. Mechanisms proposed for reducing intra‐specific competition include differential inter‐sex area use mediated by adult choice. We used GPS loggers and dive recorders to study area use and dive depth in a total of 27 male and 26 female imperial cormorants Phalacrocorax atriceps breeding at a colony of some 6500 birds at Punta Leon, Chubut, Argentina during 2004 and 2005. Although time spent travelling and distances between the colony and foraging sites were similar for both sexes, males and females travelled away from their colony using routes virtually perpendicular to each other so that their foraging areas were distinctly different; females hunted close to the coast while males foraged offshore in deeper water. Consideration of foraging efficiency underwater, defined as the duration spent on the bottom divided by the dive cycle duration, showed that females were more efficient at depths < 40 m while males more efficient at depths > 40 m. We suggest that the substantial sexual dimorphism in this species may be responsible for the different depth‐linked foraging efficiencies and that selection for appropriate depths could lead to differential habitat use and putative differences in prey selection. |
format |
Article in Journal/Newspaper |
author |
Quintana, Flavio Wilson, Rory Dell'Arciprete, Patricia Shepard, Emily Laich, Agustina Gómez |
author_facet |
Quintana, Flavio Wilson, Rory Dell'Arciprete, Patricia Shepard, Emily Laich, Agustina Gómez |
author_sort |
Quintana, Flavio |
title |
Women from Venus, men from Mars: inter‐sex foraging differences in the imperial cormorant Phalacrocorax atriceps a colonial seabird |
title_short |
Women from Venus, men from Mars: inter‐sex foraging differences in the imperial cormorant Phalacrocorax atriceps a colonial seabird |
title_full |
Women from Venus, men from Mars: inter‐sex foraging differences in the imperial cormorant Phalacrocorax atriceps a colonial seabird |
title_fullStr |
Women from Venus, men from Mars: inter‐sex foraging differences in the imperial cormorant Phalacrocorax atriceps a colonial seabird |
title_full_unstemmed |
Women from Venus, men from Mars: inter‐sex foraging differences in the imperial cormorant Phalacrocorax atriceps a colonial seabird |
title_sort |
women from venus, men from mars: inter‐sex foraging differences in the imperial cormorant phalacrocorax atriceps a colonial seabird |
publisher |
Wiley |
publishDate |
2010 |
url |
http://dx.doi.org/10.1111/j.1600-0706.2010.18387.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1600-0706.2010.18387.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1600-0706.2010.18387.x |
long_lat |
ENVELOPE(-62.533,-62.533,-76.100,-76.100) ENVELOPE(-57.842,-57.842,-61.925,-61.925) |
geographic |
Argentina Chubut Venus |
geographic_facet |
Argentina Chubut Venus |
genre |
Phalacrocorax atriceps |
genre_facet |
Phalacrocorax atriceps |
op_source |
Oikos volume 120, issue 3, page 350-358 ISSN 0030-1299 1600-0706 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1111/j.1600-0706.2010.18387.x |
container_title |
Oikos |
container_volume |
120 |
container_issue |
3 |
container_start_page |
350 |
op_container_end_page |
358 |
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1784254169121554432 |