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Updated: Nov 8, 2025
Basic Methods for the Study of Reproductive Ecology of Fish in Aquaria
Published on: July 20, 2017
Evidence of feminization in seahorses from a tropical estuary
Natalie Villar Freret-Meurer1, Amanda do Carmo Vaccani1,2, Gabriela Dos Santos Cabiró1
1Laboratory of Animal Behavior and Conservation, Universidade Santa Úrsula, Rio de Janeiro, Brazil.
Abstract:
Intersex has been reported regularly in wild populations of gonochoristic fish. The authors investigated the possible feminization of seahorses in a population of Hippocampus reidi in Brazil, as well as report a case of a brood pouch reduction after reproductive stimuli. The female seahorses of this population showed two kinds of morphological anomalies. The proportion of the animals affected in the study population was consistent and was uncorrelated with the sex ratio. The study indicates the changes in the sexual profile of the individual.
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