ArticleRoyal Society open science2022
A bioenergetics approach to understanding sex differences in the foraging behaviour of a sexually monomorphic species.
Article in Royal Society open science, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 4 papers.
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4 citing papers in PubMed.
- Sex mechanisms as nonbinary influences on cognitive diversity.Hormones and behavior · 2024Review
- Handedness and individual roll-angle specialism when plunge diving in the northern gannet.Biology letters · 2023Article
- Large-scale movement patterns in a social vulture are influenced by seasonality, sex, and breeding region.Ecology and evolution · 2023Article
- A bioenergetics approach to understanding sex differences in the foraging behaviour of a sexually monomorphic species.Royal Society open science · 2022Article
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5 authors.
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Abstract
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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