Results 151 to 160 of about 1,189 (191)
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Temperature tolerance polygon of Poecilia sphenops Valenciennes (Pisces: Poeciliidae)
Journal of Thermal Biology, 2002Abstract 1. The critical thermal maximum (CTMax) and minimum (CTMin), the upper and lower incipient lethal temperature, and the high and low avoidance temperature of Poecilia sphenops were established. 2. The area of thermal tolerance of P. sphenops upon considering the lethal limits was 863.9 (°C) 2 , the estimated area using the critical ...
Mónica Hernández R. +1 more
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Possible decision-making preadaptations in the molly Poecilia sphenops
Animal Cognition, 1999In many species females choose a mate from among several available males; in other species, the social system provides no apparent opportunity for making a decision among alternative suitors, and decision-making capacity is assumed to be minimal. The origins, bases, and logic of female mate choices are contentious questions with important cognitive ...
J. L. Gould +4 more
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Zeitschrift für Tierpsychologie, 2010
After 14 days of social isolation, half-grown Poecilia sphenops still showed no sexual activity but an increase in biting and tail beating. In relation to this result data on diurnal rhythms of the observed activities, the biological significance of the aggressivity in immature fish, and the ontogeny of the aggressive and sexual behaviour are presented.
Dierk Franck +2 more
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After 14 days of social isolation, half-grown Poecilia sphenops still showed no sexual activity but an increase in biting and tail beating. In relation to this result data on diurnal rhythms of the observed activities, the biological significance of the aggressivity in immature fish, and the ontogeny of the aggressive and sexual behaviour are presented.
Dierk Franck +2 more
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The caudal neurosecretory system of Poecilia sphenops (Poeciliidae)
Journal of Morphology, 1980AbstractThe caudal neurosecretory system of the molly, Poecilia sphenops (Poeciliidae) was studied by light and electron microscopy. In this species the cell bodies form a focal nuclear group in the caudal spinal cord. The neurosecretory cells are in contact with glial elements, axon terminals, and the lumen of the central canal.
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Molecular Phylogenetics and Evolution, 2013
We inferred the phylogenetic relationships among members of the Poecilia sphenops species complex to resolve the colonization process and radiation of this group in Central America. We analyzed 2550 base pairs (bp) of mitochondrial DNA (mtDNA), including ATP synthase 6 and 8, cytochrome oxidase subunit I and NADH dehydrogenase subunit 2 genes, and ...
Fernando, Alda +3 more
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We inferred the phylogenetic relationships among members of the Poecilia sphenops species complex to resolve the colonization process and radiation of this group in Central America. We analyzed 2550 base pairs (bp) of mitochondrial DNA (mtDNA), including ATP synthase 6 and 8, cytochrome oxidase subunit I and NADH dehydrogenase subunit 2 genes, and ...
Fernando, Alda +3 more
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Poecilia sphenops Valenciennes 1846
Published as part of Freyhof, JÖrg, Yoğurtçuoğlu, Baran, Jouladeh-Roudbar, Arash & Kaya, Cüneyt, 2025, Handbook of Freshwater Fishes of West Asia, De Gruyter on pages 769-770, DOI: 10.1515/9783111677811, http://zenodo.org/record ...Freyhof, JÖrg +3 more
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Zeitschrift für Tierpsychologie, 2010
Zusammenfassung 1 Die ♂♂ dreier Teilpopulationen der Hohlenform von Poecilia sphenops zeigen im Vergleich zu zwei oberirdischen Populationen eine graduelle Ruckbildung des Aggressionsverhaltens bis hin zum volligen Verlust bei der extremen Hohlenform, obgleich die optische Orientierung offensichtlich ungestort ist.
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Zusammenfassung 1 Die ♂♂ dreier Teilpopulationen der Hohlenform von Poecilia sphenops zeigen im Vergleich zu zwei oberirdischen Populationen eine graduelle Ruckbildung des Aggressionsverhaltens bis hin zum volligen Verlust bei der extremen Hohlenform, obgleich die optische Orientierung offensichtlich ungestort ist.
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The Sublethal Effects of Low-pH Exposure on the Chemoreception of Poecilia sphenops
Archives of Environmental Contamination and Toxicology, 2008In this study, Poecilia sphenops (gold mollies) were chronically exposed to low pH that mimic those found in natural environments, e.g., rivers and lakes. The Poecilia sphenops were placed in two separate aquaria with pH levels of 5 and 6 and presented with a different chemically mediated behavioral challenge of locating the food source.
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A Cavernicolous Form of the Poeciliid Fish Poecilia sphenops from Tabasco, Mexico
Copeia, 1962LADIGES, W. 1958. Der malaiische Gurami Spaerichthys osphromenoides Canestrini. D. Aquar. u. Terr. Z. 11:3-7. MAGOUN, H. W. 1958. The waking brain. Thomas, Springfield, Ill. 138 p. MORRIS, D. 1958. The reproductive behaviour of the ten-spined stickleback (Pygosteus pungitius L.). Behaviour Suppl. 6:1-154. MORRIS, R. W. 1956.
Malcolm S. Gordon, Donn Eric Rosen
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PROPOSTA DE CULTIVO PARA A MOLINÉSIA NEGRA - Poecilia sphenops (Valenciennes, 1846)
Acta Biologica BrasiliensiaPoecilia sphenops é uma das espécies de peixes mais populares e ornamentais de água doce em todo o mundo. Os fatores ambientais da frequência de alimentação, luminosidade, fotoperíodo e salinidade influenciam no crescimento e sobrevivência da espécie.
Paloma Cristina Pimenta +3 more
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