No geographical differences in male mate choice in a widespread fish, Limia perugiae

Behavioral Ecology, Journal Year: 2024, Volume and Issue: 35(2)

Published: Feb. 6, 2024

Abstract Behavior, like most other traits, can have a spatial component, and variability of behavior at the population level is predicted. In this article, we explore male mate choice level. Male choice, while maybe not as common female expected to evolve when males respond significant variation in quality and, for example, prefer females with higher fecundity. fishes, fecundity associated larger body size, an easily measured trait. study, investigated presence widespread species livebearing fish, Limia perugiae, comparing preferences between populations. We hypothesized that environmental variation, form salinity, might result differences. Using dichotomous tests, analyzed behavioral data 80 individuals from 7 distinct populations Hispaniola. found L. perugiae significantly preferred large females, but there was no statistical

Language: Английский

Absence of female preference and the origin of a unisexual species, the Amazon molly (Poecilia formosa)

Ethology, Journal Year: 2024, Volume and Issue: 130(8)

Published: May 10, 2024

Abstract The role of hybridization as a formative process in evolution has received much attention the past few decades. A particularly fascinating outcome hybrid speciation is formation asexual species. Amazon molly ( Poecilia formosa ) such and originated from P. mexicana mother latipinna father. Consequently, heterospecific mating must have occurred leading to molly, indicating breakdown any potential prezygotic isolation between parental Here we studied female mate preferences extant several populations using standard binary choice tests with males both sexual species that were matched for size. can be crossed lab, however, offspring are not asexual, but F 1 s. In our study, generated s tested their against males. Overall, results show no preference conspecific was detectable. matings possible hindered by apparent behavioral isolation. If these comparable around time ca. 100,000 years ago, hybrids would very likely. females also discernable either or Such lack could potentially lead 2 individuals, backcrosses, introgression.

Language: Английский

Genetic and phenotypic diversification in a widespread fish, the Sailfin Molly (Poecilia latipinna)

BMC Ecology and Evolution, Journal Year: 2024, Volume and Issue: 24(1)

Published: July 1, 2024

Abstract Widespread species often experience significant environmental clines over the area they naturally occupy. We investigated a widespread livebearing fish, Sailfin molly ( Poecilia latipinna ) combining genetic, life-history, and data, asking how structured populations are. mollies can be found in coastal freshwater brackish habitats from roughly Tampico, Veracruz Mexico to Wilmington, North Carolina, USA. In addition, are inland on Florida peninsula. Using microsatellite DNA, we genotyped 168 individuals 18 covering most of natural range molly. further determined standard life-history parameters for both males females these populations. Finally, measured biotic abiotic field. six distinct genetic clusters based with very strong indication isolation by distance. However, also numbers migrants between adjacent Despite structuring did not find evidence cryptic speciation. The migration patterns do match paleodrainages. Life histories vary but way that is easy interpret. suggest role humans sailfin molly, example form ship channel connects southern Texas Louisiana which might conduit fish migration.

Language: Английский