Results 131 to 140 of about 414 (161)

Cytogenetics of bisexual/unisexual species of Poecilia. V. Unisexual poeciliids with anomalous karyotypes from northeastern Mexico

Cytogenetics and Cell Genetics, 2008
Unisexual poeciliid fishes collected from two localities in the Soto la Marina drainage have been analyzed. Unisexual diploid and triploid specimens with anomalous karyotypes were found among karyotypically normal speci mens. Chromosomal data are discussed in light of the origin of clonal diversity in unisexual/bisexual breeding complexes and with ...
L, Sola, A R, Rossi, S, Bressanello, E M, Rasch, P J, Monaco   +4 more
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Unisexual Fish: Laboratory Synthesis of a "Species"

Science, 1973
By hybridizing bisexual (gonochoristic) fishes, all-female clones have been produced that are comparable to those of a wild unisexual "species," Poeciliopsis monacha-lucida , living in northwestern Mexico. The laboratory unisexuals have consistently given birth only to female progeny for six generations.
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Sexual behaviour in unisexual lizards

Animal Behaviour, 1983
In captivity, females of parthenogenetic species of whiptail lizards (Cnemidophorus) occasionally mount other females and behave as if attempting to mate. This occurs under crowded conditions, and probably is not related to reproduction.
Charles J. Cole, Carol R. Townsend
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Unisexual Clones: Lizards and Corals

Science, 2002
The fascinating and well-conceived Report by S. V. Vollmer and S. R. Palumbi (“Hybridization and the evolution of reef coral diversity,” 14 June, p. [2023][1]) shows that interspecific hybridization in corals can produce F1 offspring that “can reproduce asexually and form long-lived, potentially immortal hybrids with unique morphologies.” A similar ...
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The use of unisexual wasps in biological control.

2003
Unisexual reproduction has long been seen as a clear advantage for wasps to be applied in biological control projects. The discovery that the mode of reproduction in parasitoid wasps may be manipulated from sexual to unisexual and vice versa will allow biocontrol workers to test the advantage of either mode of reproduction for biological pest control ...
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Unisexual Salamanders in the Genus Ambystoma

Herpetologica, 2019
Unisexual salamanders present a novel evolutionary phenomenon that has led to many speculations with respect to their origin and persistence. These salamanders do not comply with basic evolutionary theory with respect to any of the factors that guide speciation. Indeed, none of the various unisexual salamanders can be considered a distinct species.
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Origin and Synthesis of a Unisexual Fish

1973
Prior to 1932 the scientific community had already accepted the fact that invertebrates of all sorts reproduce parthenogenetically; none the less, it came as a surprise when Hubbs and Hubbs (1932) announced the existence of a unisexual fish, the now famous Amazon molly, Poecilia formosa.
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Evolutionary Ecology of Unisexual Fishes

1984
The evolutionary ecology of unisexual fishes is distinguished from that of closely related sexual species by two peculiar aspects of their genetics: First, they reproduce, in effect, asexually, and second, their genomic constitutions are invariably identical to those of F1 hybrids. Thus, a major difficulty in analyzing the evolutionary ecology of these
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Unisexualism

2022
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Parthenogenesis and Unisexualism

2021
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