The ultrastructural features of the sperm were studied in the hermaphroditic teleost Satanoperca jurupari HECKEL, 1840 from Amazon River. Spermatocytes, spermatids and sperm develop in the testicular cysts among the different oocyte stages. Different stages of early spermatocyte development, mainly the ones with synaptonemal complexes were often observed. The mature spermatozoa belong to the introsperm type, with a short head (~ 3 mm long and 1.3 mm wide) without acrosome, short midpiece (~ 1.2 mm long and 1.8 mm wide) containing several mitochondria surrounding two centrioles and forming a mitochondrial collar. They have two flagella (each ~15 mm long) each of which has a common 9 + 2 microtubular pattern. Each flagellum has two opposite l...
Sequential cytological modifications of Hoplosternum littorale (Hancock) spermatogenesis were studie...
A espermiogênese nas espécies Steindachnerina insculpta, Cyphocharax gillii, C. modestus, C. spilotu...
The present study aimed at analyzing spermatogenesis and the changes occurring in the testis through...
The ultrastructural features of the sperm were studied in the hermaphroditic teleost Satanoperca jur...
The ultrastructural features of the sperm were studied in the hermaphroditic teleost Satanoperca jur...
Hypophthalmus marginatus is a siluriforme, belonging to the family Pimelodidae. This species is high...
Spermiogenesis and spermatozoal structure were studied in Cichla intermedia, a primitive species of ...
Spermiogenesis and spermatozoal structure were studied in Cichla intermedia, a primitive species of ...
In the Neotropical cichlid Cichla kelberi the spermiogenesis appears to be of the cystic type and is...
Fish sperm morphology is quite diverse. In the last decades our and other studies on Teleostei, main...
Spermatozoa of amazon fish, Acestrorhynchus falcatus Bloch, 1794 were investigated by optical micros...
Os dados obtidos no presente estudo sobre a ultraestrutura da espermiogênese e dos espermatozóides d...
Quagio-Grassiotto, Irani, Spadella, Maria Angélica, Carvalho, Márcio de, Oliveira, Claudio (2005): C...
Spermiogenesis in the curimatid species, Steindachnerina insculpta, Cyphocharax gillii, C. modestus,...
Spermiogenesis in the curimatid species, Steindachnerina insculpta, Cyphocharax gillii, C. modestus,...
Sequential cytological modifications of Hoplosternum littorale (Hancock) spermatogenesis were studie...
A espermiogênese nas espécies Steindachnerina insculpta, Cyphocharax gillii, C. modestus, C. spilotu...
The present study aimed at analyzing spermatogenesis and the changes occurring in the testis through...
The ultrastructural features of the sperm were studied in the hermaphroditic teleost Satanoperca jur...
The ultrastructural features of the sperm were studied in the hermaphroditic teleost Satanoperca jur...
Hypophthalmus marginatus is a siluriforme, belonging to the family Pimelodidae. This species is high...
Spermiogenesis and spermatozoal structure were studied in Cichla intermedia, a primitive species of ...
Spermiogenesis and spermatozoal structure were studied in Cichla intermedia, a primitive species of ...
In the Neotropical cichlid Cichla kelberi the spermiogenesis appears to be of the cystic type and is...
Fish sperm morphology is quite diverse. In the last decades our and other studies on Teleostei, main...
Spermatozoa of amazon fish, Acestrorhynchus falcatus Bloch, 1794 were investigated by optical micros...
Os dados obtidos no presente estudo sobre a ultraestrutura da espermiogênese e dos espermatozóides d...
Quagio-Grassiotto, Irani, Spadella, Maria Angélica, Carvalho, Márcio de, Oliveira, Claudio (2005): C...
Spermiogenesis in the curimatid species, Steindachnerina insculpta, Cyphocharax gillii, C. modestus,...
Spermiogenesis in the curimatid species, Steindachnerina insculpta, Cyphocharax gillii, C. modestus,...
Sequential cytological modifications of Hoplosternum littorale (Hancock) spermatogenesis were studie...
A espermiogênese nas espécies Steindachnerina insculpta, Cyphocharax gillii, C. modestus, C. spilotu...
The present study aimed at analyzing spermatogenesis and the changes occurring in the testis through...