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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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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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Jaw Angle Modulation in Response to Different Feeding Scenarios inPoecilia sphenops
Journal of the Arizona-Nevada Academy of Science, 2015Abstract The molly (Poecilia sphenops) has an unusual feeding mechanism among fishes in that its jaw is essentially “doublejointed”. They possess an extra joint within the lower jaw, or mandible, called an Intramandibular Joint (IMJ). Because of this joint, these fish are capable of opening their mouths to extreme angles.
Jacob Porter +2 more
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Supraependymal cells in the third ventricle of Poecilia sphenops.
Anatomischer Anzeiger, 1982The ependymal surface of the third ventricle in the hypothalamus of the black molly (Poecilia sphenops) was examined by scanning electron microscopy. Supraependymal cells were observed and could be categorized generally into two varieties, Types 1 and 2. P.
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2019
As being the main energy source that is needed for all of the industrial processes, crude oil is evaluated as a widely investigated ecotoxicant. In order to identify the effects of crude oil on the skin of teleosts, Poecilia sphenops specimens were exposed to three different concentration of soluble part of crude oil (10%, 20%, 40%) at four different ...
Önen Ö. +3 more
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As being the main energy source that is needed for all of the industrial processes, crude oil is evaluated as a widely investigated ecotoxicant. In order to identify the effects of crude oil on the skin of teleosts, Poecilia sphenops specimens were exposed to three different concentration of soluble part of crude oil (10%, 20%, 40%) at four different ...
Önen Ö. +3 more
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FEED FORMULATION WITH ANIMAL WASTE AS SUPPLEMENTS FOR ORNAMENTAL FISHES Poecilia sphenops
2021Vasanthakumaran, Murugan +4 more
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1970
In the Netherlands Antilles, opposite the Venezuelan coast, the cyprinodont fish Poecilia sphenops vandepolli is found in fresh water, in brackish water, in the sea and in supersaline water. When comparing the populations from fresh water, sea water and supersaline water some significant morphological differences were found, e.g.
Feltkamp, (Constance A.) +1 more
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In the Netherlands Antilles, opposite the Venezuelan coast, the cyprinodont fish Poecilia sphenops vandepolli is found in fresh water, in brackish water, in the sea and in supersaline water. When comparing the populations from fresh water, sea water and supersaline water some significant morphological differences were found, e.g.
Feltkamp, (Constance A.) +1 more
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