Optimizing lifetime reproductive output: intermittent breeding as a tactic for females in a long-lived, multiparous mammal
In iteroparous species, intermittent breeding is an important life‐history tactic that can greatly affect animal population growth and viability. Despite its importance, few studies have quantified the consequences of breeding pauses on lifetime reproductive output, principally because calculating l...
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Online Access: | https://doi.org/10.1111/1365-2656.12775 http://www.ncbi.nlm.nih.gov/pubmed/29063588 http://ecite.utas.edu.au/130083 |
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ftunivtasecite:oai:ecite.utas.edu.au:130083 2023-05-15T16:05:40+02:00 Optimizing lifetime reproductive output: intermittent breeding as a tactic for females in a long-lived, multiparous mammal Deprez, M Giminez, O McMahon, CR Hindell, MA Harcourt, RG 2018 https://doi.org/10.1111/1365-2656.12775 http://www.ncbi.nlm.nih.gov/pubmed/29063588 http://ecite.utas.edu.au/130083 en eng Wiley-Blackwell Publishing Ltd. http://dx.doi.org/10.1111/1365-2656.12775 Deprez, M and Giminez, O and McMahon, CR and Hindell, MA and Harcourt, RG, Optimizing lifetime reproductive output: intermittent breeding as a tactic for females in a long-lived, multiparous mammal, Journal of Animal Ecology, 87, (1) pp. 199-211. ISSN 1365-2656 (2018) [Refereed Article] http://www.ncbi.nlm.nih.gov/pubmed/29063588 http://ecite.utas.edu.au/130083 Biological Sciences Ecology Marine and Estuarine Ecology (incl. Marine Ichthyology) Refereed Article PeerReviewed 2018 ftunivtasecite https://doi.org/10.1111/1365-2656.12775 2019-12-13T22:28:10Z In iteroparous species, intermittent breeding is an important life‐history tactic that can greatly affect animal population growth and viability. Despite its importance, few studies have quantified the consequences of breeding pauses on lifetime reproductive output, principally because calculating lifetime reproductive output requires knowledge of each individual's entire reproductive history. This information is extremely difficult to obtain in wild populations. We applied novel statistical approaches that account for uncertainty in state assessment and individual heterogeneity to an 18‐year capturerecapture dataset of 6,631 female southern elephant seals from Macquarie Island. We estimated survival and breeding probabilities, and investigated the consequences of intermittent breeding on lifetime reproductive output. We found consistent differences in females demographic performance between two heterogeneity classes. In particular, breeding imbued a high cost on survival in the females from the heterogeneity class 2, assumed to be females of lower quality. Individual quality also appeared to play a major role in a female's decision to skip reproduction with females of poorer quality more likely to skip breeding events than females of higher quality. Skipping some breeding events allowed females from both heterogeneity classes to increase lifetime reproductive output over females that bred annually. However, females of lower quality produced less offspring over their lifetime. Intermittent breeding seems to be used by female southern elephant seals as a tactic to offset reproductive costs on survival and enhance lifetime reproductive output but remains unavoidable and driven by individual‐specific constraints in some other females. Article in Journal/Newspaper Elephant Seals Macquarie Island Southern Elephant Seals eCite UTAS (University of Tasmania) Journal of Animal Ecology 87 1 199 211 |
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Open Polar |
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eCite UTAS (University of Tasmania) |
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ftunivtasecite |
language |
English |
topic |
Biological Sciences Ecology Marine and Estuarine Ecology (incl. Marine Ichthyology) |
spellingShingle |
Biological Sciences Ecology Marine and Estuarine Ecology (incl. Marine Ichthyology) Deprez, M Giminez, O McMahon, CR Hindell, MA Harcourt, RG Optimizing lifetime reproductive output: intermittent breeding as a tactic for females in a long-lived, multiparous mammal |
topic_facet |
Biological Sciences Ecology Marine and Estuarine Ecology (incl. Marine Ichthyology) |
description |
In iteroparous species, intermittent breeding is an important life‐history tactic that can greatly affect animal population growth and viability. Despite its importance, few studies have quantified the consequences of breeding pauses on lifetime reproductive output, principally because calculating lifetime reproductive output requires knowledge of each individual's entire reproductive history. This information is extremely difficult to obtain in wild populations. We applied novel statistical approaches that account for uncertainty in state assessment and individual heterogeneity to an 18‐year capturerecapture dataset of 6,631 female southern elephant seals from Macquarie Island. We estimated survival and breeding probabilities, and investigated the consequences of intermittent breeding on lifetime reproductive output. We found consistent differences in females demographic performance between two heterogeneity classes. In particular, breeding imbued a high cost on survival in the females from the heterogeneity class 2, assumed to be females of lower quality. Individual quality also appeared to play a major role in a female's decision to skip reproduction with females of poorer quality more likely to skip breeding events than females of higher quality. Skipping some breeding events allowed females from both heterogeneity classes to increase lifetime reproductive output over females that bred annually. However, females of lower quality produced less offspring over their lifetime. Intermittent breeding seems to be used by female southern elephant seals as a tactic to offset reproductive costs on survival and enhance lifetime reproductive output but remains unavoidable and driven by individual‐specific constraints in some other females. |
format |
Article in Journal/Newspaper |
author |
Deprez, M Giminez, O McMahon, CR Hindell, MA Harcourt, RG |
author_facet |
Deprez, M Giminez, O McMahon, CR Hindell, MA Harcourt, RG |
author_sort |
Deprez, M |
title |
Optimizing lifetime reproductive output: intermittent breeding as a tactic for females in a long-lived, multiparous mammal |
title_short |
Optimizing lifetime reproductive output: intermittent breeding as a tactic for females in a long-lived, multiparous mammal |
title_full |
Optimizing lifetime reproductive output: intermittent breeding as a tactic for females in a long-lived, multiparous mammal |
title_fullStr |
Optimizing lifetime reproductive output: intermittent breeding as a tactic for females in a long-lived, multiparous mammal |
title_full_unstemmed |
Optimizing lifetime reproductive output: intermittent breeding as a tactic for females in a long-lived, multiparous mammal |
title_sort |
optimizing lifetime reproductive output: intermittent breeding as a tactic for females in a long-lived, multiparous mammal |
publisher |
Wiley-Blackwell Publishing Ltd. |
publishDate |
2018 |
url |
https://doi.org/10.1111/1365-2656.12775 http://www.ncbi.nlm.nih.gov/pubmed/29063588 http://ecite.utas.edu.au/130083 |
genre |
Elephant Seals Macquarie Island Southern Elephant Seals |
genre_facet |
Elephant Seals Macquarie Island Southern Elephant Seals |
op_relation |
http://dx.doi.org/10.1111/1365-2656.12775 Deprez, M and Giminez, O and McMahon, CR and Hindell, MA and Harcourt, RG, Optimizing lifetime reproductive output: intermittent breeding as a tactic for females in a long-lived, multiparous mammal, Journal of Animal Ecology, 87, (1) pp. 199-211. ISSN 1365-2656 (2018) [Refereed Article] http://www.ncbi.nlm.nih.gov/pubmed/29063588 http://ecite.utas.edu.au/130083 |
op_doi |
https://doi.org/10.1111/1365-2656.12775 |
container_title |
Journal of Animal Ecology |
container_volume |
87 |
container_issue |
1 |
container_start_page |
199 |
op_container_end_page |
211 |
_version_ |
1766401563332444160 |