Data/hora: 02/06/2024 01:32:01

Provedor de dados: | 45
País: | Brazil
Título: | Histomorphometric analysis of gonads of green turtles (chelonia mydas) stranded on the coast of Espírito Santo state, Brazil
Autores: | Failla,G.; Calais Júnior,A.; Pavanelli,L.; Nunes,L.C.
Data: | 2018-01-01
Ano: | 2018
Palavras-chave: | Follicular development; Testis development; Histology; Ovary; Testicle.
Resumo: | ABSTRACT Studies on reproduction in sea turtles are important due to its life cycle, migratory patterns, high juvenile mortality and environmental impacts. This study aimed to analyse histomorphometrically gonads of C. mydas from the coastline of the Espírito Santo State, Brazil. Ovaries and testicles were collected between 2014 and 2015 from stranded animals. The material was fixed in formalin 10%, assessed macroscopically and processed for histomorphometrical evaluation. Gonads from 34 individuals were evaluated, twenty-four females and ten males. Macroscopic sexual identification presented 100% accuracy confirmed by histology. Sexual dimorphism was observed in one individual, which was considered as adult (CCL=1.023 m). Microscopy of female gonads revealed predominant previtellogenic follicles; oocyte diameter ranged between 161µm and 750µm and a positive correlation between ovarian length, largest oocyte and CCL was found. In males, autolysis was verified in five individuals. Viable testicles revealed predominant spermatogonia, primary spermatocytes and Sertoli cells in the seminiferous tubules and, Leydig cells and fibroblasts in the stroma. There was a positive correlation between tubular diameter and CCL and testicle length and CCL. Maturation of stromal tissue and a positive correlation between tubular lumen and CCL were also observed. Gonad development is proportional to individual growth.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352018000100213
Editor: | Universidade Federal de Minas Gerais, Escola de Veterinária
Relação: | 10.1590/1678-4162-9431
Formato: | text/html
Fonte: | Arquivo Brasileiro de Medicina Veterinária e Zootecnia  v.70 n.1 2018
Fonte: | info:eu-repo/semantics/openAccess