Sexual differences in the foraging behaviour of Magellanic Penguins related to stage of breeding
Understanding the foraging behaviour of seabirds and its plasticity is vital to establish their role in marine food webs and their use as indicators of change in the availability of prey. The foraging behaviour of penguins is known to differ with locality, sex, stage of breeding and between years. W...
Published in: | Emu - Austral Ornithology |
---|---|
Main Authors: | , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Csiro Publishing
|
Subjects: | |
Online Access: | http://hdl.handle.net/11336/94845 |
id |
ftconicet:oai:ri.conicet.gov.ar:11336/94845 |
---|---|
record_format |
openpolar |
spelling |
ftconicet:oai:ri.conicet.gov.ar:11336/94845 2023-10-09T21:45:57+02:00 Sexual differences in the foraging behaviour of Magellanic Penguins related to stage of breeding Raya Rey, Andrea Nélida Pütz, Klemens Scioscia, Gabriela Lthi, Benno Schiavini, Adrian Carlos Miguel application/pdf http://hdl.handle.net/11336/94845 eng eng Csiro Publishing info:eu-repo/semantics/altIdentifier/doi/10.1071/MU11065 info:eu-repo/semantics/altIdentifier/url/https://www.tandfonline.com/doi/abs/10.1071/MU11065 http://hdl.handle.net/11336/94845 Raya Rey, Andrea Nélida; Pütz, Klemens; Scioscia, Gabriela; Lthi, Benno; Schiavini, Adrian Carlos Miguel; Sexual differences in the foraging behaviour of Magellanic Penguins related to stage of breeding; Csiro Publishing; Emu; 112; 2; 5-2012; 90-96 0158-4197 CONICET Digital CONICET info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by-nc-sa/2.5/ar/ BEAGLE CHANNEL DIVING BEHAVIOUR FORAGING ECOLOGY FORAGING STRATEGIES SEABIRDS SEXUAL DIMORPHISM TIERRA DEL FUEGO https://purl.org/becyt/ford/1.6 https://purl.org/becyt/ford/1 info:eu-repo/semantics/article info:ar-repo/semantics/artículo info:eu-repo/semantics/publishedVersion ftconicet https://doi.org/10.1071/MU11065 2023-09-24T19:40:24Z Understanding the foraging behaviour of seabirds and its plasticity is vital to establish their role in marine food webs and their use as indicators of change in the availability of prey. The foraging behaviour of penguins is known to differ with locality, sex, stage of breeding and between years. We studied the diving behaviour of breeding Magellanic Penguins (Spheniscus magellanicus), using time-depth recorders, during incubation and brooding in the 200304 and 200405 breeding seasons at Isla Martillo, Tierra del Fuego, Argentina. Foraging trips during the incubation period were longer than those during the brooding period for both sexes in both years of the study. Sex-related differences in foraging behaviour were observed during the incubation stage. During the incubation stage females performed longer foraging trips than males, foraging effort was lower, and did not dive as deep as males in both years. Foraging success was lower for females than males during incubation only in 2003. Our results suggest that sexual differences, expressed as differences in the foraging parameters of males and females, only develop when Fuegian Sprat (Sprattus fuegensis), the main prey in this locality, is not abundant close to the colony. Females may be extending the volume of water they can exploit by extending the duration of trips (horizontal distance), whereas males do so by diving deeper (vertical distance). Our results show the fundamental differences in foraging strategies between the sexes in Magellanic Penguin are a consequence of environmental conditions not morphological differences between sexes. Fil: Raya Rey, Andrea Nélida. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Austral de Investigaciones Científicas; Argentina Fil: Pütz, Klemens. Antarctic Research Trust; Alemania Fil: Scioscia, Gabriela. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Austral de Investigaciones Científicas; Argentina Fil: Lthi, Benno. Antarctic Research Trust; Alemania Fil: Schiavini, ... Article in Journal/Newspaper Antarc* Antarctic Tierra del Fuego CONICET Digital (Consejo Nacional de Investigaciones Científicas y Técnicas) Antarctic Austral Argentina Nélida ENVELOPE(-57.167,-57.167,-63.367,-63.367) Martillo ENVELOPE(-60.817,-60.817,-63.500,-63.500) Emu - Austral Ornithology 112 2 90 96 |
institution |
Open Polar |
collection |
CONICET Digital (Consejo Nacional de Investigaciones Científicas y Técnicas) |
op_collection_id |
ftconicet |
language |
English |
topic |
BEAGLE CHANNEL DIVING BEHAVIOUR FORAGING ECOLOGY FORAGING STRATEGIES SEABIRDS SEXUAL DIMORPHISM TIERRA DEL FUEGO https://purl.org/becyt/ford/1.6 https://purl.org/becyt/ford/1 |
spellingShingle |
BEAGLE CHANNEL DIVING BEHAVIOUR FORAGING ECOLOGY FORAGING STRATEGIES SEABIRDS SEXUAL DIMORPHISM TIERRA DEL FUEGO https://purl.org/becyt/ford/1.6 https://purl.org/becyt/ford/1 Raya Rey, Andrea Nélida Pütz, Klemens Scioscia, Gabriela Lthi, Benno Schiavini, Adrian Carlos Miguel Sexual differences in the foraging behaviour of Magellanic Penguins related to stage of breeding |
topic_facet |
BEAGLE CHANNEL DIVING BEHAVIOUR FORAGING ECOLOGY FORAGING STRATEGIES SEABIRDS SEXUAL DIMORPHISM TIERRA DEL FUEGO https://purl.org/becyt/ford/1.6 https://purl.org/becyt/ford/1 |
description |
Understanding the foraging behaviour of seabirds and its plasticity is vital to establish their role in marine food webs and their use as indicators of change in the availability of prey. The foraging behaviour of penguins is known to differ with locality, sex, stage of breeding and between years. We studied the diving behaviour of breeding Magellanic Penguins (Spheniscus magellanicus), using time-depth recorders, during incubation and brooding in the 200304 and 200405 breeding seasons at Isla Martillo, Tierra del Fuego, Argentina. Foraging trips during the incubation period were longer than those during the brooding period for both sexes in both years of the study. Sex-related differences in foraging behaviour were observed during the incubation stage. During the incubation stage females performed longer foraging trips than males, foraging effort was lower, and did not dive as deep as males in both years. Foraging success was lower for females than males during incubation only in 2003. Our results suggest that sexual differences, expressed as differences in the foraging parameters of males and females, only develop when Fuegian Sprat (Sprattus fuegensis), the main prey in this locality, is not abundant close to the colony. Females may be extending the volume of water they can exploit by extending the duration of trips (horizontal distance), whereas males do so by diving deeper (vertical distance). Our results show the fundamental differences in foraging strategies between the sexes in Magellanic Penguin are a consequence of environmental conditions not morphological differences between sexes. Fil: Raya Rey, Andrea Nélida. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Austral de Investigaciones Científicas; Argentina Fil: Pütz, Klemens. Antarctic Research Trust; Alemania Fil: Scioscia, Gabriela. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Austral de Investigaciones Científicas; Argentina Fil: Lthi, Benno. Antarctic Research Trust; Alemania Fil: Schiavini, ... |
format |
Article in Journal/Newspaper |
author |
Raya Rey, Andrea Nélida Pütz, Klemens Scioscia, Gabriela Lthi, Benno Schiavini, Adrian Carlos Miguel |
author_facet |
Raya Rey, Andrea Nélida Pütz, Klemens Scioscia, Gabriela Lthi, Benno Schiavini, Adrian Carlos Miguel |
author_sort |
Raya Rey, Andrea Nélida |
title |
Sexual differences in the foraging behaviour of Magellanic Penguins related to stage of breeding |
title_short |
Sexual differences in the foraging behaviour of Magellanic Penguins related to stage of breeding |
title_full |
Sexual differences in the foraging behaviour of Magellanic Penguins related to stage of breeding |
title_fullStr |
Sexual differences in the foraging behaviour of Magellanic Penguins related to stage of breeding |
title_full_unstemmed |
Sexual differences in the foraging behaviour of Magellanic Penguins related to stage of breeding |
title_sort |
sexual differences in the foraging behaviour of magellanic penguins related to stage of breeding |
publisher |
Csiro Publishing |
url |
http://hdl.handle.net/11336/94845 |
long_lat |
ENVELOPE(-57.167,-57.167,-63.367,-63.367) ENVELOPE(-60.817,-60.817,-63.500,-63.500) |
geographic |
Antarctic Austral Argentina Nélida Martillo |
geographic_facet |
Antarctic Austral Argentina Nélida Martillo |
genre |
Antarc* Antarctic Tierra del Fuego |
genre_facet |
Antarc* Antarctic Tierra del Fuego |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1071/MU11065 info:eu-repo/semantics/altIdentifier/url/https://www.tandfonline.com/doi/abs/10.1071/MU11065 http://hdl.handle.net/11336/94845 Raya Rey, Andrea Nélida; Pütz, Klemens; Scioscia, Gabriela; Lthi, Benno; Schiavini, Adrian Carlos Miguel; Sexual differences in the foraging behaviour of Magellanic Penguins related to stage of breeding; Csiro Publishing; Emu; 112; 2; 5-2012; 90-96 0158-4197 CONICET Digital CONICET |
op_rights |
info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by-nc-sa/2.5/ar/ |
op_doi |
https://doi.org/10.1071/MU11065 |
container_title |
Emu - Austral Ornithology |
container_volume |
112 |
container_issue |
2 |
container_start_page |
90 |
op_container_end_page |
96 |
_version_ |
1779321616265641984 |