In Amphibians, kinetic of spermatogenesis is linked to phyletic position and environnemental factors. By means of tritiated thymidine injections in testis of Gymnophiona, Urodela and Anura, we are able to show narrow correlations between cycle type and climate, and between sexual maturity age and life duration. Meiosis duration is species-specific, and it is linked to genetic and ecological factors.La cinétique de la spermatogenèse des Amphibiens est liée à la position phylogénique de l'espèce et aux facteurs de l'environnement. L'injection de thymidine tritiée dans les testicules de représentants des trois Ordres d'Amphi-biens (Gymnophiones, Urodèles et Anoures) montre qu'il existe une corrélation étroite entre le type de cycle et le clima...
Amphibians are experiencing a global extinction crisis and captive assurance colonies, along with re...
The aim. The aim of the work was to study the indicators of spermatogenesis in the lake frog, Peloph...
ABSTRACT: The reproductive cycle in anurans may be either continuous or discontinuous. These differ...
Tritiated-thymidine autoradiography was used to follow the progress of cells through meiosis in male...
Amphibians occupy a position of great Interest In terms of vertebrate evolution. Additionally, amphi...
Amphibians occupy a position of great interest in terms of vertebrate evolution. Additionally, amphi...
Some aspects of reproductive biology and sexual cycles in Bufo regularis Reuss (1834), amphibia, anu...
The bullfrog (Lithobates catesbeianus) has substantial economic importance and has also been used as...
The basic protein composition of sperm, as well as the change in basic proteins during spermiogenesi...
This study attempts to define the spermatogenic cycle and its environmental effectors in the male up...
In metazoan species, sexual reproduction occur through the fusion of male and female gametes. Mature...
The study of the meiotic chromosomes of the amphibia Anura offers various findings that we consider ...
Anuran amphibians display a variety of reproductive modes including, in one genus, a non-placental ...
Dans le contexte de la physiologie comparée de la reproduction, les amphibiens sont peu étudiés. Le ...
Few studies have characterized the reproductive cycles of desert anurans, particularly species from ...
Amphibians are experiencing a global extinction crisis and captive assurance colonies, along with re...
The aim. The aim of the work was to study the indicators of spermatogenesis in the lake frog, Peloph...
ABSTRACT: The reproductive cycle in anurans may be either continuous or discontinuous. These differ...
Tritiated-thymidine autoradiography was used to follow the progress of cells through meiosis in male...
Amphibians occupy a position of great Interest In terms of vertebrate evolution. Additionally, amphi...
Amphibians occupy a position of great interest in terms of vertebrate evolution. Additionally, amphi...
Some aspects of reproductive biology and sexual cycles in Bufo regularis Reuss (1834), amphibia, anu...
The bullfrog (Lithobates catesbeianus) has substantial economic importance and has also been used as...
The basic protein composition of sperm, as well as the change in basic proteins during spermiogenesi...
This study attempts to define the spermatogenic cycle and its environmental effectors in the male up...
In metazoan species, sexual reproduction occur through the fusion of male and female gametes. Mature...
The study of the meiotic chromosomes of the amphibia Anura offers various findings that we consider ...
Anuran amphibians display a variety of reproductive modes including, in one genus, a non-placental ...
Dans le contexte de la physiologie comparée de la reproduction, les amphibiens sont peu étudiés. Le ...
Few studies have characterized the reproductive cycles of desert anurans, particularly species from ...
Amphibians are experiencing a global extinction crisis and captive assurance colonies, along with re...
The aim. The aim of the work was to study the indicators of spermatogenesis in the lake frog, Peloph...
ABSTRACT: The reproductive cycle in anurans may be either continuous or discontinuous. These differ...