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A bioenergetics approach to understanding sex differences in the foraging behaviour of a sexually monomorphic species

Many animals show sexually divergent foraging behaviours reflecting different physiological constraints or energetic needs. We used a bioenergetics approach to examine sex differences in foraging behaviour of the sexually monomorphic northern gannet. We derived a relationship between dynamic body ac...

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Detalles Bibliográficos
Autores principales: Bennison, Ashley, Giménez, Joan, Quinn, John L., Green, Jonathan A., Jessopp, Mark
Formato: Online Artículo Texto
Lenguaje:English
Publicado: The Royal Society 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8790366/
https://www.ncbi.nlm.nih.gov/pubmed/35116139
http://dx.doi.org/10.1098/rsos.210520
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author Bennison, Ashley
Giménez, Joan
Quinn, John L.
Green, Jonathan A.
Jessopp, Mark
author_facet Bennison, Ashley
Giménez, Joan
Quinn, John L.
Green, Jonathan A.
Jessopp, Mark
author_sort Bennison, Ashley
collection PubMed
description Many animals show sexually divergent foraging behaviours reflecting different physiological constraints or energetic needs. We used a bioenergetics approach to examine sex differences in foraging behaviour of the sexually monomorphic northern gannet. We derived a relationship between dynamic body acceleration and energy expenditure to quantify the energetic cost of prey capture attempts (plunge dives). Fourteen gannets were tracked using GPS, time depth recorders (TDR) and accelerometers. All plunge dives in a foraging trip represented less than 4% of total energy expenditure, with no significant sex differences in expenditure. Despite females undertaking significantly more dives than males, this low energetic cost resulted in no sex differences in overall energy expenditure across a foraging trip. Bayesian stable isotope mixing models based on blood samples highlighted sex differences in diet; however, calorific intake from successful prey capture was estimated to be similar between sexes. Females experienced 10.28% higher energy demands, primarily due to unequal chick provisioning. Estimates show a minimum of 19% of dives have to be successful for females to meet their daily energy requirements, and 26% for males. Our analyses suggest northern gannets show sex differences in foraging behaviour primarily related to dive rate and success rather than the energetic cost of foraging or energetic content of prey.
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spelling pubmed-87903662022-02-02 A bioenergetics approach to understanding sex differences in the foraging behaviour of a sexually monomorphic species Bennison, Ashley Giménez, Joan Quinn, John L. Green, Jonathan A. Jessopp, Mark R Soc Open Sci Organismal and Evolutionary Biology Many animals show sexually divergent foraging behaviours reflecting different physiological constraints or energetic needs. We used a bioenergetics approach to examine sex differences in foraging behaviour of the sexually monomorphic northern gannet. We derived a relationship between dynamic body acceleration and energy expenditure to quantify the energetic cost of prey capture attempts (plunge dives). Fourteen gannets were tracked using GPS, time depth recorders (TDR) and accelerometers. All plunge dives in a foraging trip represented less than 4% of total energy expenditure, with no significant sex differences in expenditure. Despite females undertaking significantly more dives than males, this low energetic cost resulted in no sex differences in overall energy expenditure across a foraging trip. Bayesian stable isotope mixing models based on blood samples highlighted sex differences in diet; however, calorific intake from successful prey capture was estimated to be similar between sexes. Females experienced 10.28% higher energy demands, primarily due to unequal chick provisioning. Estimates show a minimum of 19% of dives have to be successful for females to meet their daily energy requirements, and 26% for males. Our analyses suggest northern gannets show sex differences in foraging behaviour primarily related to dive rate and success rather than the energetic cost of foraging or energetic content of prey. The Royal Society 2022-01-26 /pmc/articles/PMC8790366/ /pubmed/35116139 http://dx.doi.org/10.1098/rsos.210520 Text en © 2022 The Authors. https://creativecommons.org/licenses/by/4.0/Published by the Royal Society under the terms of the Creative Commons Attribution License http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) , which permits unrestricted use, provided the original author and source are credited.
spellingShingle Organismal and Evolutionary Biology
Bennison, Ashley
Giménez, Joan
Quinn, John L.
Green, Jonathan A.
Jessopp, Mark
A bioenergetics approach to understanding sex differences in the foraging behaviour of a sexually monomorphic species
title A bioenergetics approach to understanding sex differences in the foraging behaviour of a sexually monomorphic species
title_full A bioenergetics approach to understanding sex differences in the foraging behaviour of a sexually monomorphic species
title_fullStr A bioenergetics approach to understanding sex differences in the foraging behaviour of a sexually monomorphic species
title_full_unstemmed A bioenergetics approach to understanding sex differences in the foraging behaviour of a sexually monomorphic species
title_short A bioenergetics approach to understanding sex differences in the foraging behaviour of a sexually monomorphic species
title_sort bioenergetics approach to understanding sex differences in the foraging behaviour of a sexually monomorphic species
topic Organismal and Evolutionary Biology
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8790366/
https://www.ncbi.nlm.nih.gov/pubmed/35116139
http://dx.doi.org/10.1098/rsos.210520
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