Cannibalism and protective behavior of eggs in Arctic charr (Salvelinus alpinus)
| Autor: | Torvald Blikra Egeland, Marilena Frye, Ivar Folstad, Jarle Tryti Nordeide |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Milt
filial cannibalism reproductive behavior Zoology parental care VDP::Landbruks- og Fiskerifag: 900::Fiskerifag: 920::Akvakultur: 922 Biology Nature Notes VDP::Mathematics and natural science: 400::Zoology and botany: 480::Marine biology: 497 Parental investment Sperm competition QH540-549.5 Ecology Evolution Behavior and Systematics reproductive and urinary physiology Nature and Landscape Conservation Salvelinus VDP::Agriculture and fishery disciplines: 900::Fisheries science: 920::Aquaculture: 922 Ecology Landbruks- og Fiskerifag: 900::Fiskerifag: 920 [VDP] urogenital system fungi Cannibalism Filial cannibalism egg predation VDP::Matematikk og Naturvitenskap: 400::Zoologiske og botaniske fag: 480::Marinbiologi: 497 biology.organism_classification cannibalism Arctic charr Arctic protective behavior Paternal care |
| Zdroj: | 14383– 14391 Ecology and Evolution Ecology and Evolution, Vol 11, Iss 21, Pp 14383-14391 (2021) |
| Popis: | 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. From video recordings of spawning events, we quantified the protective and cannibalistic behavior of Arctic charr occurring immediately after spawning. Cannibalistic behavior was seen in almost 50% of the spawnings. Although partial filial cannibalism was observed, protective behavior of eggs was seen both among dominant males and females, suggesting that charr actually conduct paternal care. |
| Databáze: | OpenAIRE |
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