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Spermatic cell characteristics in Gymnotiformes (Teleostei: Ostariophysi) and their phylogenetic meaning
(Wiley-Blackwell, 2009-12-01)
Spermatic characteristics were studied in representatives of the families Rhamphichthyidae, Sternopygidae and Apteronotidae, and compared with pre-existent data from Gymnotidae and Hypopomidae. The spermatic characteristics ...
Spermatic cell characteristics in Gymnotiformes (Teleostei: Ostariophysi) and their phylogenetic meaning
(Wiley-Blackwell, 2009-12-01)
Spermatic characteristics were studied in representatives of the families Rhamphichthyidae, Sternopygidae and Apteronotidae, and compared with pre-existent data from Gymnotidae and Hypopomidae. The spermatic characteristics ...
Temperature and storage period over spermatic parameters of jundia, Rhamdia quelen (Quoy & Gaimard, 1824)
(Wiley-Blackwell, 2013-03-01)
The aim of this work was to evaluate the spermatic parameters of jundia, Rhamdia quelen, semen stored for short periods under different temperatures. Fifteen males were used in a time factorial experimental design (13x3x3x3). ...
Sperm quality of spontaneously occurring gynogenetic males in the yellowtail tetra Astyanax altiparanae
(2021-01-01)
Gynogenesis is a chromosomal manipulation technique where an offspring is generated exclusively from maternal inheritance. In the yellowtail tetra (Astyanax altiparanae) almost all gynogenetic fish were females, suggesting ...