African Chaffinch (Fringilla spodiogenys)

Birds of the World, Год журнала: 2024, Номер unknown

Опубликована: Фев. 9, 2024

Язык: Английский

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Sperm as a speciation phenotype in promiscuous songbirds

Evolution, Год журнала: 2024, Номер unknown

Опубликована: Ноя. 1, 2024

Abstract Sperm morphology varies considerably among species. traits may contribute to speciation if they diverge fast in allopatry and cause conspecific sperm precedence upon secondary contact. However, their role driving prezygotic isolation has been poorly investigated. Here we test the hypothesis that, early process, female promiscuity promotes a reduction overlap length distributions songbird populations. We assembled data set of 20 pairs populations with known distributions, published estimate divergence time, an index derived from extrapair paternity rates or relative testis size. found that diverged more rapidly promiscuous Faster between was caused by lower variance trait species, not faster mean lengths. The reduced is presumably due stronger stabilizing selection on mediated competition. If divergent optima causes sympatry, which remains be shown empirically, promote isolation, rapid songbirds.

Язык: Английский

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Evolution of female song and duetting in the chaffinch ( Fringilla ) species complex

Journal of Avian Biology, Год журнала: 2023, Номер 2023(3-4)

Опубликована: Янв. 24, 2023

Female song is ancestral to songbirds and shows considerable phylogenetic signal, but its presence also appears be labile correlated with life‐history ecology. While previous studies have examined the evolution of female across species‐rich families, here we studied in island populations a recently diverged species‐complex, chaffinches (genus Fringilla ). We show this behaviour has evolved these populations, probably on two independent occasions. In F. teydea , performed loose duets males, while coelebs produced solo. Populations singing females showed year‐round territoriality were found regions low seasonality – both factors previously connected high rates singing. To determine relative saliency songs conspecifics, degree which they instigate territorial defence behaviours, series speaker playback experiments. c. canariensis could induce comparable responses male song, whilst duetting similar solo songs, therefore may relate within‐pair communication instead. Our results suggest can highly trait that evolve over short evolutionary timescales.

Язык: Английский

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Large effective size as determinant of population persistence in Anostraca (Crustacea: Branchiopoda)

Conservation Genetics, Год журнала: 2023, Номер 24(6), С. 675 - 692

Опубликована: Май 26, 2023

Abstract The fairy shrimp Branchinectella media , because of its passive dispersal capacity and scarce irregularly distributed habitats (temporary saline aquatic systems), is an intriguing organism from a population genomics conservation perspective. Stochasticity events the irregular distribution habitat might lead to low levels connectivity genetic diversity, consequently, populations with limited persistence through time. Indeed, by using genomic data (SNPs), we found strong structure among some geographically isolated Iberian B. media. Interestingly, also obtained high estimates effective sizes. Lack suitable between (absence “stepping stone” network) differentiation suggest success in . However, sizes observed ensure against stochasticity (genetic drift). These results indicate that rescue-effect not be essential for if they maintain able hold adequate diversity. Should reported other dispersing Anostraca, one optimistic regard their status fate, provided natural remain undisturbed.

Язык: Английский

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Common Chaffinch (Fringilla coelebs)

Birds of the World, Год журнала: 2023, Номер unknown

Опубликована: Окт. 24, 2023

Язык: Английский

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Convergent evolution on oceanic islands: comparative genomics reveals species-specific processes in birds

Research Square (Research Square), Год журнала: 2024, Номер unknown

Опубликована: Фев. 29, 2024

Understanding the factors driving phenotypic and genomic differentiation of insular populations is major interest to gain insight into speciation process. Comparing patterns across different taxa subjected similar selective pressures upon colonizing oceanic islands provides opportunity study parallel evolution identify shared in their landscapes differentiation. We selected four species passerine birds (common chaffinch Fringilla coelebs/canariensis, red-billed chough Pyrrhocorax pyrrhocorax, house finch Haemorhous mexicanus dark-eyed/island junco Junco hyemalis/insularis) that have both mainland populations. For each species, we sequenced whole genomes from individuals infer demographic history, characterize differentiation, shaping them. estimated relative (F_st) absolute (d_xy) nucleotide diversity (π), Tajima’s D, gene density recombination rate. also searched for sweeps chromosomal inversions along genome. Changes body size between island were consistent with rule. All a marked reduction effective population (N_e) colonization. found highly differentiated regions all suggesting role selection island-mainland yet lack congruence location these indicates adapted environments differently. Our results suggest mechanisms involved, which include sweeps, inversions, historical like recurrent selection, differ despite conserved structure avian involved.

Язык: Английский

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Convergent evolution on oceanic islands: comparative genomics reveals species-specific processes in birds

Authorea (Authorea), Год журнала: 2024, Номер unknown

Опубликована: Март 12, 2024

Understanding the factors driving phenotypic and genomic differentiation of insular populations is major interest to gain insight into speciation process. Comparing patterns across different taxa subjected similar selective pressures upon colonizing oceanic islands provides opportunity study parallel evolution identify shared in their landscapes differentiation. We selected four species passerine birds (common chaffinch Fringilla coelebs/canariensis , red-billed chough Pyrrhocorax pyrrhocorax house finch Haemorhous mexicanus dark-eyed/island junco Junco hyemalis/insularis ) that have both mainland populations. For each species, we sequenced whole genomes from individuals infer demographic history, characterize differentiation, shaping them. estimated relative (F) absolute (d) nucleotide diversity (π), Tajima’s D, gene density recombination rate. also searched for sweeps chromosomal inversions along genome. Changes body size between island were consistent with rule. All a marked reduction effective population (N) colonization. found highly differentiated regions all suggesting role selection island-mainland yet lack congruence location these indicates adapted environments differently. Our results suggest mechanisms involved, which include sweeps, inversions, historical like recurrent selection, differ despite conserved structure avian involved.

Язык: Английский

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Canary Islands Chaffinch (Fringilla canariensis)

Birds of the World, Год журнала: 2024, Номер unknown

Опубликована: Фев. 9, 2024

Язык: Английский

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Azores Chaffinch (Fringilla moreletti)

Birds of the World, Год журнала: 2024, Номер unknown

Опубликована: Фев. 9, 2024

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Madeira Chaffinch (Fringilla maderensis)

Birds of the World, Год журнала: 2024, Номер unknown

Опубликована: Фев. 9, 2024

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