Results 181 to 190 of about 6,154 (213)
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Sound Production in Cyprinodon bifasciatus (Cyprinodontiformes)
Environmental Biology of Fishes, 2000Sound production in Cyprinodon bifasciatus, a pupfish endemic to the Cuatro Cienegas basin, Coahuila, Mexico, is documented. The average dominant frequency is 409 Hz, with an average duration of 55 msec. Calls were produced by males during pursuits of conspecifics and cichlids, during territory patrol, while following a female and after spawning. There
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Polymorphic Skeletal Characters in Aphanius fasciatus (Teleostei: Cyprinodontiformes)
Copeia, 1993Lynne R. Parenti, Concetta Tigano
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HISTORICAL BIOGEOGRAPHY OF THE LIVEBEARING FISH GENUS POECILIOPSIS (POECILIIDAE: CYPRINODONTIFORMES)
Evolution, 2002To assess the historical biogeography of freshwater topminnows in the genus Poeciliopsis, we examined sequence variation in two mitochondrial genes, cytochrome b (1140 bp) and NADH subunit 2 (1047 bp). This widespread fish genus is distributed from Arizona to western Colombia, and nearly half of its 21 named species have distributions that border on ...
Mateos, Mariana +2 more
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Molecular Phylogenetics and Evolution, 1999
African killifishes (Cyprinodontiformes, Aplocheilidae) historically associated with the genus Aphyosemion occur in two geographically distinct regions. One assemblage from far West Africa has been previously shown to be monophyletic and not closely related to the remaining eastern species of Aphyosemion (W. J. Murphy and G. E. Collier, 1997, Mol. Biol.
W J, Murphy +3 more
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African killifishes (Cyprinodontiformes, Aplocheilidae) historically associated with the genus Aphyosemion occur in two geographically distinct regions. One assemblage from far West Africa has been previously shown to be monophyletic and not closely related to the remaining eastern species of Aphyosemion (W. J. Murphy and G. E. Collier, 1997, Mol. Biol.
W J, Murphy +3 more
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Micron, 2013
The Sertoli cell contributes to spermatogenesis acting in the differentiation of germ cells and being the only somatic cells present in the germinal compartment. So that spermatogenesis is primarily dependent of Sertoli-Sertoli and Sertoli-germ cell interactions once Sertoli cells provide critical factors necessary for a successful differentiation of ...
Mônica, Cassel +2 more
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The Sertoli cell contributes to spermatogenesis acting in the differentiation of germ cells and being the only somatic cells present in the germinal compartment. So that spermatogenesis is primarily dependent of Sertoli-Sertoli and Sertoli-germ cell interactions once Sertoli cells provide critical factors necessary for a successful differentiation of ...
Mônica, Cassel +2 more
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Molecular Phylogenetics and Evolution
Poeciliids (Cyprinodontiformes: Poeciliidae), commonly known as livebearers, are popular fishes in the aquarium trade (e.g., guppies, mollies, swordtails) that are widely distributed in the Americas, with 274 valid species in 27 genera. This group has undergone various taxonomic changes recently, spurred by investigations using traditional genetic ...
Caleb D Mcmahan +2 more
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Poeciliids (Cyprinodontiformes: Poeciliidae), commonly known as livebearers, are popular fishes in the aquarium trade (e.g., guppies, mollies, swordtails) that are widely distributed in the Americas, with 274 valid species in 27 genera. This group has undergone various taxonomic changes recently, spurred by investigations using traditional genetic ...
Caleb D Mcmahan +2 more
exaly +3 more sources
Submicroscopic structure of spermatozoa of a cyprinodontiform teleost, Jenynsia lineata
Zeitschrift f�r Zellforschung und Mikroskopische Anatomie, 1967A submicroscopical study of Jenynsia lineata spermatids and spermatozoa has been made. The formation of an axial nuclear cavity by folding is described. A sub-mitochondrial net with a very geometrical pattern has been found in the mid piece; to the author's knowledge this structure is not comparable to any other described up to now.
L, Dadone, R, Narbaitz
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Validity and Redescription of Profundulus balsanus Ahl, 1935 (Cyprinodontiformes: Profundulidae)
Zootaxa, 2016Profundulus balsanus was described by Ahl in 1935 and later placed in synonymy with P. punctatus. Recent molecular studies have demonstrated that specimens identified as P. balsanus belong to a distinct taxon. Herein we used a combination of morphometric, meristic, coloration and osteological data in order to demonstrate the distinctiveness of P ...
José A, Jamangapé O +7 more
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Rivulus immaculatus, a New Killifish from Venezuela (Cyprinodontiformes, Rivulidae)
Copeia, 1991their unpaired fins, and two or three contact organs on the margin of each lateral body scale. Specimens were collected from cascading clear-water mountain streams, pH 6.5, temperature 21.5-24 C. Rivulus magdalenae, which the new species somewhat resembles, and R. bondi also fit Parenti's "Rivulus" definition, but R. waimacui, R.
Jamie E. Thomerson +2 more
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Molecular systematics of the genus Allodontichthys (Cyprinodontiformes: Goodeidae)
Reviews in Fish Biology and Fisheries, 2002Phylogenetic analyses of cytochrome c oxidasesubunit I (627bp) and mitochondrial controlregion (338bp aligned) sequences for all knownspecies of Allodontichthys wereperformed. Allodontichthys was recoveredas monophyletic, and A. hubbsi wassupported as the most primitive member of thegenus in all analyses. Combined-data analysessuggest that A. polylepis
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