RESUMO
The reproductive system of male Phrynops geoffroanus adults is macroscopically described and the variation in testicular biometry is evaluated. A pair of oval testes is connected by the efferent ductules to the epididymis, which continue as deferent ducts, which emerge in the penis. The volume of the gonads showed the highest averages during spring and summer months. GSI varied significantly throughout the year, with the highest averages observed in the months that correspond to the end of spring and the beginning of summer, when the reproduction of the species takes place, and the lowest averages were seen in winter, suggesting a cyclical testicular activity.
O sistema reprodutor de machos adultos de Phrynops geoffroanus é descrito macroscopicamente e a variação da biometria testicular é avaliada. Um par de testículos ovais está conectado pelos dúctulos eferentes aos epidídimos, que se continuam como ductos deferentes, e que por sua vez desembocam no pênis. O volume das gônadas apresentou as maiores médias durante os meses de primavera e verão. O IGS variou significativamente ao longo do ano, com maiores médias observadas nos meses que correspondem ao final da primavera e início do verão, quando ocorre a reprodução da espécie, e as menores médias durante o inverno, sugerindo uma atividade testicular cíclica.
Assuntos
Animais , Pênis , Testículo , Tartarugas , Sistema Urogenital , Ducto Deferente , EpididimoRESUMO
The aim of this study was to evaluate the formed elements in the periferical blood of two amostral groups of Phrynops geoffroanus: one from an urban environment under domestic sewage dumping, and another from a non-contaminated environment. Blood samples of 36 animals (females and males) were collected through cardiocentesis. Sixteen specimens were from the urban environment, and 20 were from a control environment. Samples of blood tissue were used for light microscopy analysis, and also for morphometric analysis of red blood cells. For the ultrastructural analysis, blood samples of 2 animals were used. The formed elements found, using morphological and ultrastructural analysis were: nucleated red blood cells; thrombocytes; neutrophils, lymphocytes, monocytes, basophils; eosinophils; heterophils, and azurophils. The morphometric analysis of all red blood cells parameters examinated in females showed a statistically significant difference, but in males just the nuclear area showed difference between the specimens of the two environments. The elements identified by light microscopy were elucidated by electron transmission microscopy. This P. geoffroanus study is the first one that makes a correlation between these environments and the description of turtle's blood cells, thus contributing to the identification of the hematological characteristics of this group.
