Lifetime trajectories of male mating effort under reproductive conflict in a cooperatively breeding mammal

Birch, Graham; Nichols, Hazel; Mwanguhya, Francis; Thompson, Faye J.; Cant, Michael A.; Blount, Jonathan D.

doi:10.1098/rspb.2024.1499

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Lifetime trajectories of male mating effort under reproductive conflict in a cooperatively breeding mammal

Graham Birch

, Hazel Nichols

, Francis Mwanguhya, Faye J. Thompson, Michael A. Cant

, Jonathan D. Blount

Proceedings of the Royal Society B: Biological Sciences, Volume: 291, Issue: 2031

Swansea University Author: Hazel Nichols

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DOI (Published version): 10.1098/rspb.2024.1499

Abstract

The costs of reproductive conflict can shape the evolution of life-histories in animal societies. These costs may change as individuals age and grow, and with within-group competition. Social costs of reproductive conflict have been invoked to explain why females might gain from delaying maturity or...

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Published in:	Proceedings of the Royal Society B: Biological Sciences
ISSN:	0962-8452 1471-2954
Published:	The Royal Society 2024
Online Access:	Check full text
URI:	https://cronfa.swan.ac.uk/Record/cronfa67712
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spelling	v2 67712 2024-09-18 Lifetime trajectories of male mating effort under reproductive conflict in a cooperatively breeding mammal 43ba12986bd7754484874c73eed0ebfe 0000-0002-4455-6065 Hazel Nichols Hazel Nichols true false 2024-09-18 BGPS The costs of reproductive conflict can shape the evolution of life-histories in animal societies. These costs may change as individuals age and grow, and with within-group competition. Social costs of reproductive conflict have been invoked to explain why females might gain from delaying maturity or ceasing reproduction midway through life, but not in males. Here, we analyse more than 20 years of data to understand how individual male banded mongooses adjust their reproductive activity in response to the costs of reproductive conflict. In banded mongoose groups, multiple female breeders enter oestrus synchronously that are each guarded by a single male that aggressively wards-off rivals. The heaviest males in the group gained the greatest share of paternity. Those lighter males that are reproductively active paid disproportionate survival costs, and by engaging in reproductive activity early had lower lifetime reproductive success. Our results suggest that reproductive inactivity early in life is adaptive, as males recoup any lost fitness by first growing before engaging in less costly and more profitable reproductive activity later in life. These results suggest that resource holding potential of males and the intensity of reproductive conflict interact to shape lifetime schedules of reproductive behaviour. Journal Article Proceedings of the Royal Society B: Biological Sciences 291 2031 The Royal Society 0962-8452 1471-2954 life-history, reproductive conflict, cooperative breeder, restraint, reproductive costs, male 18 9 2024 2024-09-18 10.1098/rspb.2024.1499 COLLEGE NANME Biosciences Geography and Physics School COLLEGE CODE BGPS Swansea University Another institution paid the OA fee G.B. received funding from NERC GW4+ (grant no. NE/S007504/1). Data collection was funded by an ERC Starting Grant (SOCODEV, grant no. 309249) and NERC (UK) Standard Grants (NE/E015441/1; NE/J010278/1) awarded to M.A.C. and NE/N011171 awarded to J.B. and M.A.C. The funders had no role in study design, data collection and analysis, decision to publish or preparation of the manuscript. For the purpose of open access, the author has applied a Creative Commons Attribution (CC BY) licence to any author accepted manuscript version arising from this submission. 2024-10-23T17:03:30.7684827 2024-09-18T10:57:49.0228416 Faculty of Science and Engineering School of Biosciences, Geography and Physics - Biosciences Graham Birch 0000-0002-7412-4095 1 Hazel Nichols 0000-0002-4455-6065 2 Francis Mwanguhya 3 Faye J. Thompson 4 Michael A. Cant 0000-0002-1530-3077 5 Jonathan D. Blount 0000-0002-0016-0130 6 67712__31538__e8cc8bf0ed7e457cb87abc2dc7edc5e2.pdf birch-et-al-2024-lifetime-trajectories-of-male-mating-effort-under-reproductive-conflict-in-a-cooperatively-breeding (1).pdf 2024-10-04T11:13:13.2957447 Output 780193 application/pdf Version of Record true © 2024 The Author(s). Distributed under the terms of the Creative Commons Attribution License. true eng http://creativecommons.org/licenses/by/4.0/,
title	Lifetime trajectories of male mating effort under reproductive conflict in a cooperatively breeding mammal
spellingShingle	Lifetime trajectories of male mating effort under reproductive conflict in a cooperatively breeding mammal Hazel Nichols
title_short	Lifetime trajectories of male mating effort under reproductive conflict in a cooperatively breeding mammal
title_full	Lifetime trajectories of male mating effort under reproductive conflict in a cooperatively breeding mammal
title_fullStr	Lifetime trajectories of male mating effort under reproductive conflict in a cooperatively breeding mammal
title_full_unstemmed	Lifetime trajectories of male mating effort under reproductive conflict in a cooperatively breeding mammal
title_sort	Lifetime trajectories of male mating effort under reproductive conflict in a cooperatively breeding mammal
author_id_str_mv	43ba12986bd7754484874c73eed0ebfe
author_id_fullname_str_mv	43ba12986bd7754484874c73eed0ebfe_***_Hazel Nichols
author	Hazel Nichols
author2	Graham Birch Hazel Nichols Francis Mwanguhya Faye J. Thompson Michael A. Cant Jonathan D. Blount
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container_title	Proceedings of the Royal Society B: Biological Sciences
container_volume	291
container_issue	2031
publishDate	2024
institution	Swansea University
issn	0962-8452 1471-2954
doi_str_mv	10.1098/rspb.2024.1499
publisher	The Royal Society
college_str	Faculty of Science and Engineering
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description	The costs of reproductive conflict can shape the evolution of life-histories in animal societies. These costs may change as individuals age and grow, and with within-group competition. Social costs of reproductive conflict have been invoked to explain why females might gain from delaying maturity or ceasing reproduction midway through life, but not in males. Here, we analyse more than 20 years of data to understand how individual male banded mongooses adjust their reproductive activity in response to the costs of reproductive conflict. In banded mongoose groups, multiple female breeders enter oestrus synchronously that are each guarded by a single male that aggressively wards-off rivals. The heaviest males in the group gained the greatest share of paternity. Those lighter males that are reproductively active paid disproportionate survival costs, and by engaging in reproductive activity early had lower lifetime reproductive success. Our results suggest that reproductive inactivity early in life is adaptive, as males recoup any lost fitness by first growing before engaging in less costly and more profitable reproductive activity later in life. These results suggest that resource holding potential of males and the intensity of reproductive conflict interact to shape lifetime schedules of reproductive behaviour.
published_date	2024-09-18T17:03:28Z
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Lifetime trajectories of male mating effort under reproductive conflict in a cooperatively breeding mammal

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