Differential migration in Pacific salmon and trout: Patterns and hypotheses

Migrations affect the population dynamics, life history, evolution, and connections of animals to natural ecosystems and humans. Many species and populations display partial migration (some individuals migrate and some do not), and differential migration (migration distance varies). Partial migratio...

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Autor principal:	Quinn Thomas P.
Formato:	article
Lenguaje:	EN
Publicado:	De Gruyter 2021
Materias:	partial migration anadromy life history phylogeny conservation oncorhynchus Biology (General) QH301-705.5
Acceso en línea:	https://doaj.org/article/fc80ccbb424d474783242903c247365a
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spelling	oai:doaj.org-article:fc80ccbb424d474783242903c247365a2021-12-02T17:22:43ZDifferential migration in Pacific salmon and trout: Patterns and hypotheses2084-883810.1515/ami-2021-0001https://doaj.org/article/fc80ccbb424d474783242903c247365a2021-01-01T00:00:00Zhttps://doi.org/10.1515/ami-2021-0001https://doaj.org/toc/2084-8838Migrations affect the population dynamics, life history, evolution, and connections of animals to natural ecosystems and humans. Many species and populations display partial migration (some individuals migrate and some do not), and differential migration (migration distance varies). Partial migration is widely distributed in fishes but the term differential migration is much less commonly applied, despite the occurrence of this phenomenon. This paper briefly reviews the extent of differential migration in Pacific salmon and trout (genus Oncorhynchus), a very extensively studied group. Three hypotheses are presented to explain the patterns among species: 1) phylogenetic relationships, 2) the prevalence of partial migration (i.e., variation in anadromy), and 3) life history patterns (iteroparous or semelparous, and duration spent feeding at sea prior to maturation). Each hypothesis has some support but none is consistent with all patterns. The prevalence of differential migration, ranging from essentially non-existent to common within a species, reflects phylogeny and life history, interacting with the geographic features of the region where juvenile salmon enter the ocean. Notwithstanding the uncertain evolution of this behavior, it has very clear implications for salmon conservation, as it strongly affects exposure to predators, patterns of fishery exploitation and also uptake of toxic contaminants.Quinn Thomas P.De Gruyterarticlepartial migrationanadromylife historyphylogenyconservationoncorhynchusBiology (General)QH301-705.5ENAnimal Migration, Vol 8, Iss 1, Pp 1-18 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	partial migration anadromy life history phylogeny conservation oncorhynchus Biology (General) QH301-705.5
spellingShingle	partial migration anadromy life history phylogeny conservation oncorhynchus Biology (General) QH301-705.5 Quinn Thomas P. Differential migration in Pacific salmon and trout: Patterns and hypotheses
description	Migrations affect the population dynamics, life history, evolution, and connections of animals to natural ecosystems and humans. Many species and populations display partial migration (some individuals migrate and some do not), and differential migration (migration distance varies). Partial migration is widely distributed in fishes but the term differential migration is much less commonly applied, despite the occurrence of this phenomenon. This paper briefly reviews the extent of differential migration in Pacific salmon and trout (genus Oncorhynchus), a very extensively studied group. Three hypotheses are presented to explain the patterns among species: 1) phylogenetic relationships, 2) the prevalence of partial migration (i.e., variation in anadromy), and 3) life history patterns (iteroparous or semelparous, and duration spent feeding at sea prior to maturation). Each hypothesis has some support but none is consistent with all patterns. The prevalence of differential migration, ranging from essentially non-existent to common within a species, reflects phylogeny and life history, interacting with the geographic features of the region where juvenile salmon enter the ocean. Notwithstanding the uncertain evolution of this behavior, it has very clear implications for salmon conservation, as it strongly affects exposure to predators, patterns of fishery exploitation and also uptake of toxic contaminants.
format	article
author	Quinn Thomas P.
author_facet	Quinn Thomas P.
author_sort	Quinn Thomas P.
title	Differential migration in Pacific salmon and trout: Patterns and hypotheses
title_short	Differential migration in Pacific salmon and trout: Patterns and hypotheses
title_full	Differential migration in Pacific salmon and trout: Patterns and hypotheses
title_fullStr	Differential migration in Pacific salmon and trout: Patterns and hypotheses
title_full_unstemmed	Differential migration in Pacific salmon and trout: Patterns and hypotheses
title_sort	differential migration in pacific salmon and trout: patterns and hypotheses
publisher	De Gruyter
publishDate	2021
url	https://doaj.org/article/fc80ccbb424d474783242903c247365a
work_keys_str_mv	AT quinnthomasp differentialmigrationinpacificsalmonandtroutpatternsandhypotheses
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Differential migration in Pacific salmon and trout: Patterns and hypotheses

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