Linking extreme interannual changes in prey availability to foraging behaviour and breeding investment in a marine predator, the macaroni penguin
Understanding the mechanisms that link prey availability to predator behaviour and population change is central to projecting how a species may respond to future environmental pressures. We documented the behavioural responses and breeding investment of macaroni penguins Eudyptes chrysolophus across...
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ftuglasgow:oai:eprints.gla.ac.uk:148123 2024-05-19T07:39:53+00:00 Linking extreme interannual changes in prey availability to foraging behaviour and breeding investment in a marine predator, the macaroni penguin Horswill, Cat Trathan, Phil Ratcliffe, Norman 2017-09-14 text https://eprints.gla.ac.uk/148123/ https://eprints.gla.ac.uk/148123/7/148123.pdf en eng Public Library of Science https://eprints.gla.ac.uk/148123/7/148123.pdf Horswill, C. <http://eprints.gla.ac.uk/view/author/38228.html> , Trathan, P. and Ratcliffe, N. (2017) Linking extreme interannual changes in prey availability to foraging behaviour and breeding investment in a marine predator, the macaroni penguin. PLoS ONE <https://eprints.gla.ac.uk/view/journal_volume/PLoS_ONE.html>, 12(9), e0184114. (doi:10.1371/journal.pone.0184114 <https://doi.org/10.1371/journal.pone.0184114>) (PMID:28910405) (PMCID:PMC5598940) cc_by_4 QL Zoology Articles PeerReviewed 2017 ftuglasgow https://doi.org/10.1371/journal.pone.0184114 2024-05-01T14:03:38Z Understanding the mechanisms that link prey availability to predator behaviour and population change is central to projecting how a species may respond to future environmental pressures. We documented the behavioural responses and breeding investment of macaroni penguins Eudyptes chrysolophus across five breeding seasons where local prey density changed by five-fold; from very low to highly abundant. When prey availability was low, foraging trips were significantly longer and extended overnight. Birds also foraged farther from the colony, potentially in order to reach more distant foraging grounds and allow for increased search times. These extended foraging trips were also linked to a marked decrease in fledgling weights, most likely associated with reduced rates of provisioning. Furthermore, by comparing our results with previous work on this population, it appears that lowered first-year survival rates associated, at least partially, with fledging masses were also evident for this cohort. This study integrates a unique set of prey density, predator behaviour and predator breeding investment data to highlight a possible behavioural mechanism linking perturbations in prey availability to population demography. Article in Journal/Newspaper Eudyptes chrysolophus Macaroni penguin University of Glasgow: Enlighten - Publications PLOS ONE 12 9 e0184114 |
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Open Polar |
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University of Glasgow: Enlighten - Publications |
op_collection_id |
ftuglasgow |
language |
English |
topic |
QL Zoology |
spellingShingle |
QL Zoology Horswill, Cat Trathan, Phil Ratcliffe, Norman Linking extreme interannual changes in prey availability to foraging behaviour and breeding investment in a marine predator, the macaroni penguin |
topic_facet |
QL Zoology |
description |
Understanding the mechanisms that link prey availability to predator behaviour and population change is central to projecting how a species may respond to future environmental pressures. We documented the behavioural responses and breeding investment of macaroni penguins Eudyptes chrysolophus across five breeding seasons where local prey density changed by five-fold; from very low to highly abundant. When prey availability was low, foraging trips were significantly longer and extended overnight. Birds also foraged farther from the colony, potentially in order to reach more distant foraging grounds and allow for increased search times. These extended foraging trips were also linked to a marked decrease in fledgling weights, most likely associated with reduced rates of provisioning. Furthermore, by comparing our results with previous work on this population, it appears that lowered first-year survival rates associated, at least partially, with fledging masses were also evident for this cohort. This study integrates a unique set of prey density, predator behaviour and predator breeding investment data to highlight a possible behavioural mechanism linking perturbations in prey availability to population demography. |
format |
Article in Journal/Newspaper |
author |
Horswill, Cat Trathan, Phil Ratcliffe, Norman |
author_facet |
Horswill, Cat Trathan, Phil Ratcliffe, Norman |
author_sort |
Horswill, Cat |
title |
Linking extreme interannual changes in prey availability to foraging behaviour and breeding investment in a marine predator, the macaroni penguin |
title_short |
Linking extreme interannual changes in prey availability to foraging behaviour and breeding investment in a marine predator, the macaroni penguin |
title_full |
Linking extreme interannual changes in prey availability to foraging behaviour and breeding investment in a marine predator, the macaroni penguin |
title_fullStr |
Linking extreme interannual changes in prey availability to foraging behaviour and breeding investment in a marine predator, the macaroni penguin |
title_full_unstemmed |
Linking extreme interannual changes in prey availability to foraging behaviour and breeding investment in a marine predator, the macaroni penguin |
title_sort |
linking extreme interannual changes in prey availability to foraging behaviour and breeding investment in a marine predator, the macaroni penguin |
publisher |
Public Library of Science |
publishDate |
2017 |
url |
https://eprints.gla.ac.uk/148123/ https://eprints.gla.ac.uk/148123/7/148123.pdf |
genre |
Eudyptes chrysolophus Macaroni penguin |
genre_facet |
Eudyptes chrysolophus Macaroni penguin |
op_relation |
https://eprints.gla.ac.uk/148123/7/148123.pdf Horswill, C. <http://eprints.gla.ac.uk/view/author/38228.html> , Trathan, P. and Ratcliffe, N. (2017) Linking extreme interannual changes in prey availability to foraging behaviour and breeding investment in a marine predator, the macaroni penguin. PLoS ONE <https://eprints.gla.ac.uk/view/journal_volume/PLoS_ONE.html>, 12(9), e0184114. (doi:10.1371/journal.pone.0184114 <https://doi.org/10.1371/journal.pone.0184114>) (PMID:28910405) (PMCID:PMC5598940) |
op_rights |
cc_by_4 |
op_doi |
https://doi.org/10.1371/journal.pone.0184114 |
container_title |
PLOS ONE |
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12 |
container_issue |
9 |
container_start_page |
e0184114 |
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