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Primeira descrição de corpo lúteo cavitário gestacional em Sotalia guianensis (Van Bénéden, 1864) - Relato de Caso

2010; Volume: 17; Issue: 2 Linguagem: Inglês

10.4322/rbcv.2014.149

1984-7130

Luciana da Silva Lemos, Ana Paula Madeira Di Beneditto, Carvalho Eulógio Carlos Queiróz de,

Fish Biology and Ecology Studies

This is the first study to describe the corpus luteum with central cavity during pregnancy in Sotalia guianensis, a coastal dolphin species distributed along the Atlantic Ocean coast.The material analyzed was a pair of ovaries of a 196-cm-long female was 9.2 months pregnant, accidentally captured on the north coast of the state of Rio de Janeiro, Brazil.Both ovaries were measured and inspected for anatomic structures.After, ovaries were process in paraffin-embedded and stained with hematoxylin and eosin for microscopy.The left ovary had a wrinkled outside, one follicle, six corpora lutea and four corpora albicans.The largest corpus luteum was protruded, 3 cm long in mean diameter with one central cavity.It was lined by uniform thick walls and peripheral vascularization, which suggests that the corpus luteum is under development.The left ovary was deformed due to the presence of corpus luteum, which accounted for the seven-fold higher weight as compared to the right ovary.The histology of the corpus luteum did not evince any pathologic status of the material.This description, the first ever made for the species, offers a contribution to the existing knowledge about the reproduction biology of S. guianensis, which is a member of the "Insufficient Data" Red List prepared by the World Conservation Union.