Predator arrival elicits differential dispersal, change in age structure and reproductive performance in a prey population

Abstract Predators are an important ecological and evolutionary force shaping prey population dynamics. Ecologists have extensively assessed the lethal effects of invasive predators on prey populations. However, the role of non-lethal effects, such as physiological stress or behavioural responses li...

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Autores principales:	A. Payo-Payo, A. Sanz-Aguilar, M. Genovart, A. Bertolero, J. Piccardo, D. Camps, J. Ruiz-Olmo, D. Oro
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2018
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/a5b2fdbc9c8f464aa937d05f912b1f5d
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spelling	oai:doaj.org-article:a5b2fdbc9c8f464aa937d05f912b1f5d2021-12-02T15:05:02ZPredator arrival elicits differential dispersal, change in age structure and reproductive performance in a prey population10.1038/s41598-018-20333-02045-2322https://doaj.org/article/a5b2fdbc9c8f464aa937d05f912b1f5d2018-01-01T00:00:00Zhttps://doi.org/10.1038/s41598-018-20333-0https://doaj.org/toc/2045-2322Abstract Predators are an important ecological and evolutionary force shaping prey population dynamics. Ecologists have extensively assessed the lethal effects of invasive predators on prey populations. However, the role of non-lethal effects, such as physiological stress or behavioural responses like dispersal, has been comparatively overlooked and their potential population effects remain obscure. Over the last 23 years, we developed a mark-recapture program for the Audouin’s gull and an intensive carnivore monitoring program to assess how the appearance and invasion of the study site by carnivores affects population dynamics. We evaluate changes in turnover of discrete breeding patches within the colony, age structure and breeding performance. Once carnivores entered the colony, the number of occupied patches increased, indicating a higher patch turnover. Breeders responded by moving to areas less accessible to carnivores. More importantly, the presence of carnivores caused differential (and density-independent) breeding dispersal: experienced, better-performing breeders were more likely to leave the colony than younger breeders. This differential dispersal modified the age structure and reduced the reproductive performance of the population. Our results confirm the importance experience in the study of populations. The role of differential dispersal for animal population dynamics might be more important than previously thought, especially under scenarios of global change.A. Payo-PayoA. Sanz-AguilarM. GenovartA. BertoleroJ. PiccardoD. CampsJ. Ruiz-OlmoD. OroNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 8, Iss 1, Pp 1-7 (2018)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q A. Payo-Payo A. Sanz-Aguilar M. Genovart A. Bertolero J. Piccardo D. Camps J. Ruiz-Olmo D. Oro Predator arrival elicits differential dispersal, change in age structure and reproductive performance in a prey population
description	Abstract Predators are an important ecological and evolutionary force shaping prey population dynamics. Ecologists have extensively assessed the lethal effects of invasive predators on prey populations. However, the role of non-lethal effects, such as physiological stress or behavioural responses like dispersal, has been comparatively overlooked and their potential population effects remain obscure. Over the last 23 years, we developed a mark-recapture program for the Audouin’s gull and an intensive carnivore monitoring program to assess how the appearance and invasion of the study site by carnivores affects population dynamics. We evaluate changes in turnover of discrete breeding patches within the colony, age structure and breeding performance. Once carnivores entered the colony, the number of occupied patches increased, indicating a higher patch turnover. Breeders responded by moving to areas less accessible to carnivores. More importantly, the presence of carnivores caused differential (and density-independent) breeding dispersal: experienced, better-performing breeders were more likely to leave the colony than younger breeders. This differential dispersal modified the age structure and reduced the reproductive performance of the population. Our results confirm the importance experience in the study of populations. The role of differential dispersal for animal population dynamics might be more important than previously thought, especially under scenarios of global change.
format	article
author	A. Payo-Payo A. Sanz-Aguilar M. Genovart A. Bertolero J. Piccardo D. Camps J. Ruiz-Olmo D. Oro
author_facet	A. Payo-Payo A. Sanz-Aguilar M. Genovart A. Bertolero J. Piccardo D. Camps J. Ruiz-Olmo D. Oro
author_sort	A. Payo-Payo
title	Predator arrival elicits differential dispersal, change in age structure and reproductive performance in a prey population
title_short	Predator arrival elicits differential dispersal, change in age structure and reproductive performance in a prey population
title_full	Predator arrival elicits differential dispersal, change in age structure and reproductive performance in a prey population
title_fullStr	Predator arrival elicits differential dispersal, change in age structure and reproductive performance in a prey population
title_full_unstemmed	Predator arrival elicits differential dispersal, change in age structure and reproductive performance in a prey population
title_sort	predator arrival elicits differential dispersal, change in age structure and reproductive performance in a prey population
publisher	Nature Portfolio
publishDate	2018
url	https://doaj.org/article/a5b2fdbc9c8f464aa937d05f912b1f5d
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_version_	1718388975704473600

Predator arrival elicits differential dispersal, change in age structure and reproductive performance in a prey population

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