Contrasting offspring dependence periods and diving development rates in two closely related marine mammal species
Understanding the ontogeny of diving behaviour in marine megafauna is crucial owing to its influence on foraging success, energy budgets, and mortality. We compared the ontogeny of diving behaviour in two closely related species—northern elephant seals ( Mirounga angustirostris, n = 4) and southern...
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Online Access: | http://dx.doi.org/10.1098/rsos.230666 https://royalsocietypublishing.org/doi/pdf/10.1098/rsos.230666 https://royalsocietypublishing.org/doi/full-xml/10.1098/rsos.230666 |
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crroyalsociety:10.1098/rsos.230666 2024-06-02T08:06:01+00:00 Contrasting offspring dependence periods and diving development rates in two closely related marine mammal species Jouma'a, Joffrey Orgeret, Florian Picard, Baptiste Robinson, Patrick W. Weimerskirch, Henri Guinet, Christophe Costa, Daniel P. Beltran, Roxanne S. European Research Council Institut Polaire Français Paul Emile Victor National Science Foundation Packard Fellowship for Science and Engineering National Geographic Society 2024 http://dx.doi.org/10.1098/rsos.230666 https://royalsocietypublishing.org/doi/pdf/10.1098/rsos.230666 https://royalsocietypublishing.org/doi/full-xml/10.1098/rsos.230666 en eng The Royal Society http://creativecommons.org/licenses/by/4.0/ http://creativecommons.org/licenses/by/4.0/ Royal Society Open Science volume 11, issue 1 ISSN 2054-5703 journal-article 2024 crroyalsociety https://doi.org/10.1098/rsos.230666 2024-05-07T14:16:54Z Understanding the ontogeny of diving behaviour in marine megafauna is crucial owing to its influence on foraging success, energy budgets, and mortality. We compared the ontogeny of diving behaviour in two closely related species—northern elephant seals ( Mirounga angustirostris, n = 4) and southern elephant seals ( Mirounga leonina, n = 9)—to shed light on the ecological processes underlying migration. Although both species have similar sizes and behaviours as adults, we discovered that juvenile northern elephant seals have superior diving development, reaching 260 m diving depth in just 30 days, while southern elephant seals require 160 days. Similarly, northern elephant seals achieve dive durations of approximately 11 min on their first day of migration, while southern elephant seals take 125 days. The faster physiological maturation of northern elephant seals could be related to longer offspring dependency and post-weaning fast durations, allowing them to develop their endogenous oxygen stores. Comparison across both species suggests that weaned seal pups face a trade-off between leaving early with higher energy stores but poorer physiological abilities or leaving later with improved physiology but reduced fat stores. This trade-off might be influenced by their evolutionary history, which shapes their migration behaviours in changing environments over time. Article in Journal/Newspaper Elephant Seals Mirounga leonina Southern Elephant Seals The Royal Society Royal Society Open Science 11 1 |
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The Royal Society |
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crroyalsociety |
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English |
description |
Understanding the ontogeny of diving behaviour in marine megafauna is crucial owing to its influence on foraging success, energy budgets, and mortality. We compared the ontogeny of diving behaviour in two closely related species—northern elephant seals ( Mirounga angustirostris, n = 4) and southern elephant seals ( Mirounga leonina, n = 9)—to shed light on the ecological processes underlying migration. Although both species have similar sizes and behaviours as adults, we discovered that juvenile northern elephant seals have superior diving development, reaching 260 m diving depth in just 30 days, while southern elephant seals require 160 days. Similarly, northern elephant seals achieve dive durations of approximately 11 min on their first day of migration, while southern elephant seals take 125 days. The faster physiological maturation of northern elephant seals could be related to longer offspring dependency and post-weaning fast durations, allowing them to develop their endogenous oxygen stores. Comparison across both species suggests that weaned seal pups face a trade-off between leaving early with higher energy stores but poorer physiological abilities or leaving later with improved physiology but reduced fat stores. This trade-off might be influenced by their evolutionary history, which shapes their migration behaviours in changing environments over time. |
author2 |
European Research Council Institut Polaire Français Paul Emile Victor National Science Foundation Packard Fellowship for Science and Engineering National Geographic Society |
format |
Article in Journal/Newspaper |
author |
Jouma'a, Joffrey Orgeret, Florian Picard, Baptiste Robinson, Patrick W. Weimerskirch, Henri Guinet, Christophe Costa, Daniel P. Beltran, Roxanne S. |
spellingShingle |
Jouma'a, Joffrey Orgeret, Florian Picard, Baptiste Robinson, Patrick W. Weimerskirch, Henri Guinet, Christophe Costa, Daniel P. Beltran, Roxanne S. Contrasting offspring dependence periods and diving development rates in two closely related marine mammal species |
author_facet |
Jouma'a, Joffrey Orgeret, Florian Picard, Baptiste Robinson, Patrick W. Weimerskirch, Henri Guinet, Christophe Costa, Daniel P. Beltran, Roxanne S. |
author_sort |
Jouma'a, Joffrey |
title |
Contrasting offspring dependence periods and diving development rates in two closely related marine mammal species |
title_short |
Contrasting offspring dependence periods and diving development rates in two closely related marine mammal species |
title_full |
Contrasting offspring dependence periods and diving development rates in two closely related marine mammal species |
title_fullStr |
Contrasting offspring dependence periods and diving development rates in two closely related marine mammal species |
title_full_unstemmed |
Contrasting offspring dependence periods and diving development rates in two closely related marine mammal species |
title_sort |
contrasting offspring dependence periods and diving development rates in two closely related marine mammal species |
publisher |
The Royal Society |
publishDate |
2024 |
url |
http://dx.doi.org/10.1098/rsos.230666 https://royalsocietypublishing.org/doi/pdf/10.1098/rsos.230666 https://royalsocietypublishing.org/doi/full-xml/10.1098/rsos.230666 |
genre |
Elephant Seals Mirounga leonina Southern Elephant Seals |
genre_facet |
Elephant Seals Mirounga leonina Southern Elephant Seals |
op_source |
Royal Society Open Science volume 11, issue 1 ISSN 2054-5703 |
op_rights |
http://creativecommons.org/licenses/by/4.0/ http://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.1098/rsos.230666 |
container_title |
Royal Society Open Science |
container_volume |
11 |
container_issue |
1 |
_version_ |
1800750903346593792 |