Nota sobre a identificação dos sexos do Apaiari, Astronotus ocellatus (Cuvier): (Pisces - Cichlidae)
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منابع مشابه
Diagnostic imaging of a renal adenoma in a Red Oscar (Astronotus ocellatus Cuvier, 1829).
This case report describes the radiographic, ultrasonographic and computed tomographic (CT) examination of an abdominal swelling in a Red Oscar (Astronotus ocellatus Cuvier, 1829). While radiography only demonstrated caudoventral compression of the swimbladder, ultrasonography found a huge tumor-like parenchyma in the caudal abdomen. CT studies detected a possible connection between the tumor a...
متن کاملOscars, Astronotus ocellatus, have a dietary requirement for vitamin C.
We found that vitamin C is an essential nutrient for an Amazonian ornamental fish, the oscar (Astronotus ocellatus). This was demonstrated by the absence of L-gulonolactone oxidase activity, the enzyme responsible for the biosynthesis of vitamin C, in liver or kidney of oscars and by a feeding trial in which oscars without vitamin C dietary supplementation developed clinical deficiency signs. F...
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The cichlid Hypsophrys nicaraguensis is a popular fish known as butterfly, and despite its widespread use as pets, little is known about its reproductive biology. In order to contribute to this knowledge, the study describes the relevant larval development characteristics, from adult and larval cultures in captivity. Every 12h, samples of larvae were collected and observed under the microscope ...
متن کاملInteractions between hypoxia tolerance and food deprivation in Amazonian oscars, Astronotus ocellatus.
Oscars are often subjected to a combination of low levels of oxygen and fasting during nest-guarding on Amazonian floodplains. We questioned whether this anorexia would aggravate the osmo-respiratory compromise. We compared fed and fasted oscars (10-14 days) in both normoxia and hypoxia (10-20 Torr, 4 h). Routine oxygen consumption rates (O2) were increased by 75% in fasted fish, reflecting beh...
متن کاملSelectivity in regeneration of the oculomotor nerve in the cichlid fish, Astronotus ocellatus.
IT has long been considered a general rule for nerve regeneration that the reinnervation of skeletal muscle is nonselective. Regenerating nerve fibers are supposed to reconnect with one skeletal muscle as readily as another according to studies covering a wide range of vertebrates (Weiss, 1937; Weiss & Taylor, 1944; Weiss & Hoag, 1946; Bernstein & Guth, 1961; Guth, 1961, 1962, 1963). Similarly,...
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ژورنال
عنوان ژورنال: Revista Brasileira de Zoologia
سال: 1989
ISSN: 0101-8175
DOI: 10.1590/s0101-81751989000400002