Now showing items 1-6 of 6
Spermatozoon ultrastructure and semen parameters of Brycon vermelha (Characiformes, Characidae)
(Animal Reproduction Science, 2015-06-01) [Artigo]
This study analyzed semen parameters and the ultrastructure of spermatozoa of Brycon vermelha. The semen was white and viscous, with a mean volume of 5.0 +/- 2.6 mL/kg body weight and mean spermatozoon concentration of 4.3 ...
Histochemical and morphological features of biopsied and stripped oocytes from the Brazilian endangered teleost pirapitinga, Brycon nattereri (Characiformes)
(Zygote, 2015-06-01) [Artigo]
The aim of the present study was to characterize biopsied and stripped oocytes from the Brazilian endangered teleost pirapitinga (Brycon nattereri) using histochemical and morphological analyses. Biopsied oocytes had a ...
Influence of cage farming on feeding and reproductive aspects of Pimelodus maculatus Lacépède, 1803 (Siluriformes: Pimelodidae) in the Chavantes reservoir, Brazil
(Acta Scientiarum. Biological Sciences, 2014) [Artigo]
This study evaluated the diet and reproductive aspects of the population of Pimelodus maculatus around net cage fish farming in order to assess the possible impacts of this activity. Monthly collections were performed from ...
Oogenesis in Laetacara araguaiae (Ottoni and Costa, 2009) (Labriformes: Cichlidae)
(Zygote (cambridge, England), 2015-09-09) [Artigo]
We aimed to analyze the oogenesis of adult females of the cichlid fish Laetacara araguaiae. The specimens' gonads were removed and processed for light and transmission electron microscopy. Oogenesis in L. araguaiae showed ...
Ciclo testicular de Devario aequipinnatus (Teleostei, Cyprinidae): Um potencial modelo biológico em experimentação animal
(Boletim do Instituto de Pesca, 2016-01-01) [Artigo]
The presente study describes the testicular structure, spermatogenesis and maturation phases in the Devario aequipinnatus, a species with great potential for use as a biological model for animal experimentation. The testes ...
Ovarian cycle in Devario aequipinnatus with emphasis on oogenesis
(Zygote, 2018-04-01) [Artigo]
Summary This study aimed to understand how germ cell development occurs in females of Devario aequipinnatus, by morphologically describing oogenesis and the reproductive phases. Sexually mature females of D. aequipinnatus ...