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Cell junctions in fish seminiferous epithelium
(2009-01-01)
Similar to mammals, in fish the cellular interactions between Sertoli cells (SC) and germ cells (GC) in the seminiferous epithelium have important structural and functional roles. In this review, we give a brief summary ...
Determination of selenium by GFAAS in slurries of fish feces to estimate the bioavailability of this micronutrient in feed used in pisciculture
(Elsevier B.V., 2007-07-01)
This paper presents a simple, fast and sensitive method to determine selenium in samples of feces and of fish feed by graphite furnace atomic absorption spectrometry (GFAAS) through the direct introduction of slurries of ...
Clinical and epidemiological study of 27 poisonings caused by ingesting puffer fish (Tetrodontidae) in the states of Santa Catarina and Bahia, Brazil
(Instituto de Medicina Tropical, 2010-02-01)
Os baiacus ou peixes-bola podem ser venenosos devido à presença em seus tecidos corporais de Tetrodotoxina e/ou Saxitoxina, ambas potentes neurotoxinas. Os autores relatam 27 envenenamentos por ingestão da carne de baiacus. ...
Effects of acute heat exposure on respiratory metabolism and blood glucose in freshwater fishes, Prochilodus scrofa (curimbatá) and Cyprinus carpio (carp) acclimatized to tropical winter
(1985-12-01)
1. 1. Routine oxygen consumption and blood glucose were determined from freshwater fishes, Prochilodus scrofa and Cyprinus carpio, exposed at high temperatures for 1 hr. 2. 2. Prochilodus scrofa had a significantly higher ...
The fish zonation of the Itanha,m river basin in the Atlantic Forest of southeast Brazil
(Springer, 2009-12-01)
The distribution range of fishes along an upstream-downstream gradient within a river basin is determined by the ecological requirements of each fish species. This differential pattern of distribution may suggest the ...
Amino acid composition of processed fish silage using different raw materials
(Elsevier B.V., 2003-03-31)
The objective was to evaluate amino acid composition of silages produced from three raw materials. Commercial marine fish waste, commercial freshwater fish waste, and tilapia filleting residue were used to produce fish ...
Reduction of a native fish fauna by alien species: an example from Brazilian freshwater tropical lakes
(Blackwell Publishing, 2004-04-01)
The consequences of introducing Cichla cf. monoculus Spix & Agassiz, Astronotus ocellatus (Agassiz) and Pygocentrus nattereri Kner into lakes in the River Doce basin, Brazil, on richness, diversity and efficiency of aquatic ...
Diversity of fish species in the River Paranapanema Jurumirim Reservoir transition region (São Paulo, Brazil)
(Unione Zoologica Italiana, 1998-01-01)
The diversity of fish species in an transition zone between the River Paranapanema and the head mouth of the Jurumirim Reservoir was evaluated. Fish samples were collected from October 1995 to September 1996, by experimental ...
Testicular ultrastructure and morphology of the seminal pathway in Prochilodus scrofa
(2001-07-01)
The seminiferous tubules of Prochilodus scrofa present a coiled morphological arrangement with intertubular anastomoses and unrestricted spermatogonial distribution. The structural pattern of the seminiferous tubules is ...