Nutrition During Gestation in 2 Species of Viviparous Fishes (Poeciliidae): Poecilia latipinna (Lecithotrophic) and Heterandria formosa (Matrotrophic) [PDF]
FishesIn viviparous teleosts, the lack of oviducts defines intraovarian gestation, with the ovary being the site for oogenesis but also the site for insemination, fertilization, and gestation.
Mari Carmen Uribe +3 more
doaj +2 more sources
A Tetraploid Amazon Molly, Poecilia formosa [PDF]
Journal of Heredity, 2008 Polyploidization is thought to be an important driving force in evolution as it increases the genetic material on which mutation and selection can act. In the Amazon molly, Poecilia formosa, triploid genotypes can be found in the field and frequently arise from diploid breeding stocks, a tetraploid individual, however, was so far never documented. Here,
Kathrin P. Lampert +3 more
openalex +3 more sources
Developmental arcs of plasticity in whole movement repertoires of a clonal fish [PDF]
iScienceSummary: Developmental plasticity at the behavioral repertoire level allows animals to incrementally adjust their behavioral phenotypes to match their environments through ontogeny.
Sean M. Ehlman +5 more
doaj +2 more sources
INTERSPECIFIC HYBRIDIZATION AND THE EVOLUTIONARY ORIGIN OF A GYNOGENETIC FISH, POECILIA FORMOSA [PDF]
Evolution, 1980 In recent years, largely through the application of allozyme techniques, several unisexual (thelytokous) vertebrates have been shown to be genetically equivalent to F1 hybrids of certain related bisexual species. The causal relationship, however, between interspecific hybridization and the origin of unisexuality has not been elucidated, and the role of
Bruce J. Turner +2 more
openalex +5 more sources
Behavioral responses of a clonal fish to perceived predation risk [PDF]
PeerJPredation threat is a major driver of behavior in many prey species. Animals can recognize their relative risk of predation based on cues in the environment, including visual and/or chemical cues released by a predator or from its prey.
Jonathan Aguiñaga +3 more
doaj +3 more sources
Predator exposure early in life shapes behavioral development and individual variation in a clonal fish [PDF]
Scientific ReportsPredation risk is one of the most important factors generating behavioral differences among populations. In addition, recent attention focusses on predation as a potential driver of patterns of individual behavioral variation within prey populations ...
U. Scherer +5 more
doaj +2 more sources
EVIDENCE FOR A MONOPHYLETIC ORIGIN OF TRIPLOID CLONES OF THE AMAZON MOLLY, POECILIA FORMOSA [PDF]
Evolution, 2005 Asexual reproduction in vertebrates is rare and generally considered an evolutionary dead end. Asexuality is often associated with polyploidy, and several hypotheses have been put forward to explain this relationship. So far, it remains unclear whether polyploidization in asexual organisms is a frequent or a rare event. Here we present a field study on
Kathrin P. Lampert +2 more
openalex +3 more sources
Population genomics reveals a possible history of backcrossing and recombination in the gynogenetic fish Poecilia formosa. [PDF]
Proc Natl Acad Sci U S A, 2013 Alberici da Barbiano L +4 more
europepmc +3 more sources
Intraspecific Variation in Elemental Composition of the Least Killifish Tracks Spatial Variation in Periphyton Composition. [PDF]
Ecol EvolWe examined organismal stoichiometry and trophic niche of Heterandria formosa , a periphyton grazer, in eight populations, four each from freshwater springs and shallow lakes. Water chemistry varied along a gradient from lakes to springs. Population variation in organismal stoichiometry of fish tracked the variation observed in periphyton samples ...
Pluer BD, MacRae PSD, Travis J.
europepmc +2 more sources
Long-Term Sperm Storage in a Superfetatious Live-Bearing Fish (<i>Poeciliopsis gracilis</i>, Poeciliidae). [PDF]
Ecol EvolAmong the vertebrates, live‐bearing fishes of the family Poeciliidae are generally assumed to store sperm for extended periods of time, but the temporal dynamics of this process remain enigmatic for most species. With this study, we assess the maximum duration of sperm storage and usage in the superfetatious poeciliid Poeciliopsis gracilis by comparing
Ernst TR +6 more
europepmc +2 more sources