Cannibalism and protective behavior of eggs in Arctic charr (Salvelinus alpinus)

Abstract From video recordings of spawning events, we quantified protective and cannibalistic behavior of Arctic charr occurring immediately after spawning. The number of fish cannibalizing on stray eggs was examined regarding (a) whether more than one male shed milt during the spawning event, that...

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Autores principales:	Marilena Frye, Torvald B. Egeland, Jarle Tryti Nordeide, Ivar Folstad
Formato:	article
Lenguaje:	EN
Publicado:	Wiley 2021
Materias:	Arctic charr cannibalism egg predation filial cannibalism parental care protective behavior Ecology QH540-549.5
Acceso en línea:	https://doaj.org/article/7a9c3ac3580645bfb1736c761aeea597
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spelling	oai:doaj.org-article:7a9c3ac3580645bfb1736c761aeea5972021-11-08T17:10:40ZCannibalism and protective behavior of eggs in Arctic charr (Salvelinus alpinus)2045-775810.1002/ece3.8173https://doaj.org/article/7a9c3ac3580645bfb1736c761aeea5972021-11-01T00:00:00Zhttps://doi.org/10.1002/ece3.8173https://doaj.org/toc/2045-7758Abstract From video recordings of spawning events, we quantified protective and cannibalistic behavior of Arctic charr occurring immediately after spawning. The number of fish cannibalizing on stray eggs was examined regarding (a) whether more than one male shed milt during the spawning event, that is, whether sperm competition occurred, (b) whether the sperm competition included few or many males, that is, the intensity of sperm competition, and (c) the density of fish at the spawning site. Response behavior toward egg cannibalism was also examined among females and dominant males in order to determine any parental investment toward protecting the eggs after spawning. Cannibalistic behavior was seen in almost 50% of the spawnings, and the multiple spawning events showed the highest numbers of fish cannibalizing on eggs. Both the number of males releasing milt and the number of fish approaching the spawning site were positively correlated with egg cannibalism. Sperm competition was, however, not a prerequisite for egg cannibalism. Although we also observed partial filial cannibalism, protective behavior of eggs was seen both among dominant males and females, suggesting that charr actually conduct parental care.Marilena FryeTorvald B. EgelandJarle Tryti NordeideIvar FolstadWileyarticleArctic charrcannibalismegg predationfilial cannibalismparental careprotective behaviorEcologyQH540-549.5ENEcology and Evolution, Vol 11, Iss 21, Pp 14383-14391 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Arctic charr cannibalism egg predation filial cannibalism parental care protective behavior Ecology QH540-549.5
spellingShingle	Arctic charr cannibalism egg predation filial cannibalism parental care protective behavior Ecology QH540-549.5 Marilena Frye Torvald B. Egeland Jarle Tryti Nordeide Ivar Folstad Cannibalism and protective behavior of eggs in Arctic charr (Salvelinus alpinus)
description	Abstract From video recordings of spawning events, we quantified protective and cannibalistic behavior of Arctic charr occurring immediately after spawning. The number of fish cannibalizing on stray eggs was examined regarding (a) whether more than one male shed milt during the spawning event, that is, whether sperm competition occurred, (b) whether the sperm competition included few or many males, that is, the intensity of sperm competition, and (c) the density of fish at the spawning site. Response behavior toward egg cannibalism was also examined among females and dominant males in order to determine any parental investment toward protecting the eggs after spawning. Cannibalistic behavior was seen in almost 50% of the spawnings, and the multiple spawning events showed the highest numbers of fish cannibalizing on eggs. Both the number of males releasing milt and the number of fish approaching the spawning site were positively correlated with egg cannibalism. Sperm competition was, however, not a prerequisite for egg cannibalism. Although we also observed partial filial cannibalism, protective behavior of eggs was seen both among dominant males and females, suggesting that charr actually conduct parental care.
format	article
author	Marilena Frye Torvald B. Egeland Jarle Tryti Nordeide Ivar Folstad
author_facet	Marilena Frye Torvald B. Egeland Jarle Tryti Nordeide Ivar Folstad
author_sort	Marilena Frye
title	Cannibalism and protective behavior of eggs in Arctic charr (Salvelinus alpinus)
title_short	Cannibalism and protective behavior of eggs in Arctic charr (Salvelinus alpinus)
title_full	Cannibalism and protective behavior of eggs in Arctic charr (Salvelinus alpinus)
title_fullStr	Cannibalism and protective behavior of eggs in Arctic charr (Salvelinus alpinus)
title_full_unstemmed	Cannibalism and protective behavior of eggs in Arctic charr (Salvelinus alpinus)
title_sort	cannibalism and protective behavior of eggs in arctic charr (salvelinus alpinus)
publisher	Wiley
publishDate	2021
url	https://doaj.org/article/7a9c3ac3580645bfb1736c761aeea597
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Cannibalism and protective behavior of eggs in Arctic charr (Salvelinus alpinus)

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