Migratory behaviour shapes spatial genetic structure of cyprinid fishes within the Lake Malawi catchment

Sungani, Harold; Ngatunga, Benjamin P.; Genner, Martin J.

doi:10.1111/fwb.12767

Cited by 11 publications

(11 citation statements)

References 47 publications

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“…It has been established that differences in migratory behaviour exist between genetically distinct populations (Cavedon et al, 2019; Sungani, Ngatunga, & Genner, 2016). Typically, genome-wide association studies of migratory behaviour using natural populations have two very distinct groups that are often geographically separated (Lundberg et al, 2017).…”

Section: Discussionmentioning

confidence: 99%

Genomic correlates for migratory direction in a free-ranging cervid

Bonar

Anderson

et al. 2022

Preprint

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Animal migrations are some of the most ubiquitous and one of the most threatened ecological processes. A wide range of migratory behaviours occur in nature, and this behaviour is not uniform between and within species, where even individuals in the same population can exhibit differentiation. While the environment largely drives migratory behaviour, it is necessary to understand the genetic mechanisms influencing migration to elucidate the adaptive potential of migratory species to cope with novel conditions and adapt to environmental change. In this study, we identified genes associated with migratory traits by undertaking pooled genome-wide scans on a natural population of a facultatively migrating ungulate. We identified genomic regions associated with variation in migratory direction in the study population, including FTM1, a gene linked to the formation of lipids, and DPPA3, a gene linked to epigenetic modifications of the maternal line. Such a genetic basis for migratory traits can have implications on heritability of behaviour and the flexibility of individuals to change their behaviour in the face of stochastic changes in their environment.

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Section: Discussionmentioning

confidence: 99%

Genomic correlates for migratory direction in a free-ranging cervid

Bonar

Anderson

et al. 2022

Preprint

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“…B 289: 20221969 variation or population structure [69,87]. It has been established that differences in migratory behaviour exist between genetically distinct populations [14,88]. Typically, genomewide association studies of migratory behaviour using natural populations have two very distinct groups that are often geographically separated [13].…”

Section: Discussionmentioning

confidence: 99%

Genomic correlates for migratory direction in a free-ranging cervid

Bonar

Anderson

et al. 2022

Proc. R. Soc. B.

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Animal migrations are some of the most ubiquitous and one of the most threatened ecological processes globally. A wide range of migratory behaviours occur in nature, and this behaviour is not uniform among and within species, where even individuals in the same population can exhibit differences. While the environment largely drives migratory behaviour, it is necessary to understand the genetic mechanisms influencing migration to elucidate the potential of migratory species to cope with novel conditions and adapt to environmental change. In this study, we identified genes associated with a migratory trait by undertaking pooled genome-wide scans on a natural population of migrating mule deer. We identified genomic regions associated with variation in migratory direction, including FITM1, a gene linked to the formation of lipids, and DPPA3, a gene linked to epigenetic modifications of the maternal line. Such a genetic basis for a migratory trait contributes to the adaptive potential of the species and might affect the flexibility of individuals to change their behaviour in the face of changes in their environment.

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“…Dispersal is, therefore, thought to play a pivotal role in population dynamics, colonization of novel habitats and geographic distribution of freshwater and marine fishes [ 9 ]. In this regard, the presence or absence of a post-hatching planktonic larval period at an early life history stage has been suggested to be a key component in characterizing the degree and pattern of population connectivity or geographic population structure in both marine [ 10 , 11 ] and freshwater species [ 3 , 5 , 6 , 12 ].…”

Section: Introductionmentioning

confidence: 99%

“…A number of previous studies suggest that life history characteristics are significantly associated with the degree of population connectivity of freshwater fishes [ 6 , 13 ]. In salmonid fishes that have evolved and diverged into migratory and resident populations within species, the greater dispersal capacity of migratory populations has generally resulted in lower degrees of spatial population structure relative to resident populations [ 14 ].…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, studying evolutionarily closely related species with contrasting life history types over small geographic scales will provide a good opportunity for directly testing the influences of the larval phase on population connectivity. Moreover, it will allow us to determine the role of life history in shaping the patterns of intraspecific genetic variation in light of the evolution of geographic population structure [ 6 ].…”

Section: Introductionmentioning

confidence: 99%

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Contrasting life histories contribute to divergent patterns of genetic diversity and population connectivity in freshwater sculpin fishes

Baek

Kang

et al. 2018

BMC Evol Biol

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BackgroundLife history characteristics are considered important factors influencing the evolutionary processes of natural populations, including the patterns of population genetic structure of a species. The sister species Cottus hangiongensis and C. koreanus are small bottom-dwelling freshwater sculpin fishes from South Korea that display marked life history divergence but are morphologically nearly indistinguishable. Cottus hangiongensis evolved an ‘amphidromous’ life history with a post-hatching pelagic larval phase. They spawn many small eggs in the low reaches of rivers, and hatched larvae migrate to the sea before returning to grow to maturity in the river mouth. In contrast, C. koreanus evolved a ‘fluvial’ landlocked type with benthic larvae. They release a smaller number of larger eggs, and the larvae undergo direct development, remaining benthic in the upstream rivers throughout their entire lives. We tested whether there were differences in patterns and levels of within-population genetic diversities and spatial population structure between the two closely related Korean sculpins using mitochondrial DNA control region sequences and seven nuclear microsatellite loci.ResultsThe combined analyses of both marker sets revealed that C. hangiongensis harboured considerably higher levels of within-population genetic diversities (e.g. haplotype/allelic richness, heterozygosities) than C. koreanus. In contrast, the fluvial sculpin exhibited noticeably more spatial population structure than did the amphidromous sculpin, as suggested by pairwise FST statistics. The finding that C. hangiongensis individuals comprised a single random mating population across the east-flowing river basins in the Korean Peninsula, whereas C. koreanus individuals comprised genetically discrete individual populations, was further supported by an individual-based Bayesian population assignment and also factorial correspondence analyses.ConclusionsThe higher genetic diversity, but lower population structure, of the amphidromous sculpin relative to the fluvial sculpin may have resulted from its greater larval dispersal and also possibly, higher fecundity accompanied by an amphidromous life history. Hence, we conclude that contrasting early life histories – including the presence or absence of the pelagic larval phase – may have led to divergent patterns of within-population genetic diversities and spatial population structure between the sister Cottus species following speciation from a common ancestor of marine sculpin.Electronic supplementary materialThe online version of this article (10.1186/s12862-018-1171-8) contains supplementary material, which is available to authorized users.

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Migratory behaviour shapes spatial genetic structure of cyprinid fishes within the Lake Malawi catchment

Cited by 11 publications

References 47 publications

Genomic correlates for migratory direction in a free-ranging cervid

Genomic correlates for migratory direction in a free-ranging cervid

Genomic correlates for migratory direction in a free-ranging cervid

Contrasting life histories contribute to divergent patterns of genetic diversity and population connectivity in freshwater sculpin fishes

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