The Role of Male Choice in the Assortative Mating of Anadromous and Non-Anadromous Sockeye Salmon (Oncorhynchus Nerka)

Foote, Christopher L.; Larkin, Peter

doi:10.1163/156853988x00089

Cited by 150 publications

(114 citation statements)

References 38 publications

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“…Assortative mating by life-history type is probably necessary for reproductive isolation to develop in sympatry (Foote & Larkin, 1988). We suggest that the sex ratio within both types must probably be close to 1:1 for assortative mating to be a viable strategy.…”

Section: Discussionmentioning

confidence: 82%

Genetic relationships among landlocked, resident, and anadromous Brown Trout, Salmo trutta L.

et al. 1991

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Coexisting freshwater resident and anadromous (sea-run migratory) Brown Trout, Salmo trutta L., were compared genetically with landlocked populations (i.e. living above impassable waterfalls) in the same drainage system in western Norway. No genetic differentiation was found between resident and anadromous life-history types using the same locality and time for spawning. In contrast, significant genetic differences were found between Brown Trout (irrespective of lifehistory type) spawning in geographically separate localities, and particularly large differences were found between landlocked Brown Trout and those from localities accessible from the sea. These resuhs are consistent with other multiple-locus studies of salmonid fishes, showing larger genetic differentiation between localities than between coexisting life-history types that differ in morphology and ecology.

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Section: Discussionmentioning

confidence: 82%

Genetic relationships among landlocked, resident, and anadromous Brown Trout, Salmo trutta L.

et al. 1991

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“…Ó lafsdó ttir and others 251 large and small morphs coexisting (Snorrason & Skú lason 2004). Mate choice is often based on body size and assortative mating may evolve between fishes of different size groups (Foote & Larkin 1988;Sigurjó nsdó ttir & Gunnarsson 1989;McKinnon et al 2004). The common observation of size-assortative mating in systems of sympatric morphs of freshwater fishes has important implications for models of speciation because it may indicate that divergence in nature is best described by single character models.…”

Section: Discussionmentioning

confidence: 99%

“…Sympatric morphs of many fishes species differ in body size and size often influences premating isolation, e.g. in sticklebacks (Gasterosteus aculeatus L.; Nagel & Schluter 1998;McKinnon et al 2004), sockeye and kokanee salmon (Oncorhyncus nerka; Foote & Larkin 1988) and Arctic charr (Salvelinus alpinus; Sigurjó nsdó ttir & Gunnarsson 1989).…”

Section: Introductionmentioning

confidence: 99%

Positive assortative mating between recently described sympatric morphs of Icelandic sticklebacks

2006

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Recently, models of sympatric speciation have suggested that assortative mating can develop between sympatric morphs due to divergence in an ecologically important character. For example, in sympatric pairs of threespine stickleback ( Gasterosteus aculeatus L.) size-assortative mating seems to be instrumental in reproductive isolation. Here, we examine courtship behaviour and assortative mating of newly described sympatric stickleback morphs in Lake Thingvallavatn, Iceland. We find that the two morphs show strong positive assortative mating. However, the mechanism involved in mate choice does not seem to be as straightforward as in other similar systems of sympatric stickleback morphs and may involve variation in nest type.

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“…size, seasonal-or host-dependent) polyphenisms to segregate a population into spatially andlor assortatively mating cohorts of like phenotype, where any genetic differences affecting phenotype determination would be exaggerated, enhancing the likelihood of speciation. Such a process may be occurring in salmon, where partial assortative mating of combined-switch anadromous and nonanadromous phenotypes differing in size and habitat (but spawning together) is associated with genetic divergence of forms (66,67). This may prove an important phenomenon, since homogamy by size is widespread in animals (166), as are size-associated alternative phenotypes in mating (21,54,57,58,176,210), and ecological behavior (62,91,121,138,175).…”

Section: Evidence That Polyphenism Contributes To Speciationmentioning

confidence: 99%

Phenotypic Plasticity and the Origins of Diversity

West‐Eberhard¹

1989

Annu. Rev. Ecol. Syst.

1,767

985

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The Role of Male Choice in the Assortative Mating of Anadromous and Non-Anadromous Sockeye Salmon (Oncorhynchus Nerka)

Cited by 150 publications

References 38 publications

Genetic relationships among landlocked, resident, and anadromous Brown Trout, Salmo trutta L.

Genetic relationships among landlocked, resident, and anadromous Brown Trout, Salmo trutta L.

Positive assortative mating between recently described sympatric morphs of Icelandic sticklebacks

Phenotypic Plasticity and the Origins of Diversity

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