Bioenergetic modelling of a marine top predator's responses to changes in prey structure
Abstract Determining how animals allocate energy, and how external factors influence this allocation, is crucial to understand species' life history requirements and response to disturbance. This response is driven in part by individuals' energy balance, prey characteristics, foraging beha...
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ftdoajarticles:oai:doaj.org/article:f8bd1816382240bd98bd7aa565bd0a45 2024-09-15T18:30:31+00:00 Bioenergetic modelling of a marine top predator's responses to changes in prey structure Mariana P. Silva Cláudia Oliveira Rui Prieto Mónica A. Silva Leslie New Sergi Pérez‐Jorge 2024-03-01T00:00:00Z https://doi.org/10.1002/ece3.11135 https://doaj.org/article/f8bd1816382240bd98bd7aa565bd0a45 EN eng Wiley https://doi.org/10.1002/ece3.11135 https://doaj.org/toc/2045-7758 2045-7758 doi:10.1002/ece3.11135 https://doaj.org/article/f8bd1816382240bd98bd7aa565bd0a45 Ecology and Evolution, Vol 14, Iss 3, Pp n/a-n/a (2024) bioenergetics energy foraging success rate marine mammal modelling physiological ecology Ecology QH540-549.5 article 2024 ftdoajarticles https://doi.org/10.1002/ece3.11135 2024-08-05T17:49:46Z Abstract Determining how animals allocate energy, and how external factors influence this allocation, is crucial to understand species' life history requirements and response to disturbance. This response is driven in part by individuals' energy balance, prey characteristics, foraging behaviour and energy required for essential functions. We developed a bioenergetic model to estimate minimum foraging success rate (FSR), that is, the lowest possible prey capture rate for individuals to obtain the minimum energy intake needed to meet daily metabolic requirements, for female sperm whale (Physeter macrocephalus). The model was based on whales' theoretical energetic requirements using foraging and prey characteristics from animal‐borne tags and stomach contents, respectively. We used this model to simulate two prey structure change scenarios: (1) decrease in mean prey size, thus lower prey energy content and (2) decrease in prey size variability, reducing the variability in prey energy content. We estimate the whales need minimum of ~14% FSR to meet their energetic requirements, and energy intake is more sensitive to energy content changes than a decrease in energy variability. To estimate vulnerability to prey structure changes, we evaluated the compensation level required to meet bioenergetic demands. Considering a minimum 14% FSR, whales would need to increase energy intake by 21% (5–35%) and 49% (27–67%) to compensate for a 15% and 30% decrease in energy content, respectively. For a 30% and 50% decrease in energy variability, whales would need to increase energy intake by 13% (0–23%) and 24% (10–35%) to meet energetic demands, respectively. Our model demonstrates how foraging and prey characteristics can be used to estimate impact of changing prey structure in top predator energetics, which can help inform bottom‐up effects on marine ecosystems. We showed the importance of considering different FSR in bioenergetics models, as it can have decisive implications on estimates of energy acquired and affect the ... Article in Journal/Newspaper Physeter macrocephalus Sperm whale Directory of Open Access Journals: DOAJ Articles Ecology and Evolution 14 3 |
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Open Polar |
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Directory of Open Access Journals: DOAJ Articles |
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ftdoajarticles |
language |
English |
topic |
bioenergetics energy foraging success rate marine mammal modelling physiological ecology Ecology QH540-549.5 |
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bioenergetics energy foraging success rate marine mammal modelling physiological ecology Ecology QH540-549.5 Mariana P. Silva Cláudia Oliveira Rui Prieto Mónica A. Silva Leslie New Sergi Pérez‐Jorge Bioenergetic modelling of a marine top predator's responses to changes in prey structure |
topic_facet |
bioenergetics energy foraging success rate marine mammal modelling physiological ecology Ecology QH540-549.5 |
description |
Abstract Determining how animals allocate energy, and how external factors influence this allocation, is crucial to understand species' life history requirements and response to disturbance. This response is driven in part by individuals' energy balance, prey characteristics, foraging behaviour and energy required for essential functions. We developed a bioenergetic model to estimate minimum foraging success rate (FSR), that is, the lowest possible prey capture rate for individuals to obtain the minimum energy intake needed to meet daily metabolic requirements, for female sperm whale (Physeter macrocephalus). The model was based on whales' theoretical energetic requirements using foraging and prey characteristics from animal‐borne tags and stomach contents, respectively. We used this model to simulate two prey structure change scenarios: (1) decrease in mean prey size, thus lower prey energy content and (2) decrease in prey size variability, reducing the variability in prey energy content. We estimate the whales need minimum of ~14% FSR to meet their energetic requirements, and energy intake is more sensitive to energy content changes than a decrease in energy variability. To estimate vulnerability to prey structure changes, we evaluated the compensation level required to meet bioenergetic demands. Considering a minimum 14% FSR, whales would need to increase energy intake by 21% (5–35%) and 49% (27–67%) to compensate for a 15% and 30% decrease in energy content, respectively. For a 30% and 50% decrease in energy variability, whales would need to increase energy intake by 13% (0–23%) and 24% (10–35%) to meet energetic demands, respectively. Our model demonstrates how foraging and prey characteristics can be used to estimate impact of changing prey structure in top predator energetics, which can help inform bottom‐up effects on marine ecosystems. We showed the importance of considering different FSR in bioenergetics models, as it can have decisive implications on estimates of energy acquired and affect the ... |
format |
Article in Journal/Newspaper |
author |
Mariana P. Silva Cláudia Oliveira Rui Prieto Mónica A. Silva Leslie New Sergi Pérez‐Jorge |
author_facet |
Mariana P. Silva Cláudia Oliveira Rui Prieto Mónica A. Silva Leslie New Sergi Pérez‐Jorge |
author_sort |
Mariana P. Silva |
title |
Bioenergetic modelling of a marine top predator's responses to changes in prey structure |
title_short |
Bioenergetic modelling of a marine top predator's responses to changes in prey structure |
title_full |
Bioenergetic modelling of a marine top predator's responses to changes in prey structure |
title_fullStr |
Bioenergetic modelling of a marine top predator's responses to changes in prey structure |
title_full_unstemmed |
Bioenergetic modelling of a marine top predator's responses to changes in prey structure |
title_sort |
bioenergetic modelling of a marine top predator's responses to changes in prey structure |
publisher |
Wiley |
publishDate |
2024 |
url |
https://doi.org/10.1002/ece3.11135 https://doaj.org/article/f8bd1816382240bd98bd7aa565bd0a45 |
genre |
Physeter macrocephalus Sperm whale |
genre_facet |
Physeter macrocephalus Sperm whale |
op_source |
Ecology and Evolution, Vol 14, Iss 3, Pp n/a-n/a (2024) |
op_relation |
https://doi.org/10.1002/ece3.11135 https://doaj.org/toc/2045-7758 2045-7758 doi:10.1002/ece3.11135 https://doaj.org/article/f8bd1816382240bd98bd7aa565bd0a45 |
op_doi |
https://doi.org/10.1002/ece3.11135 |
container_title |
Ecology and Evolution |
container_volume |
14 |
container_issue |
3 |
_version_ |
1810471987750895616 |