Influence of Triiodothyronine (T3) on the Reproduction and Development of the Green Terror Andinoacara rivulatus (Cichlidae)

Resumo

It has been shown experimentally that hyperthyroidism, caused by prolonged treatment of triiodothyronine, influences on the development of secondary sexual characteristics, fertility and spawning behavior of the green terror Andinoacara rivulatus. In hyperthyroid fish with pronounced morphological consequences due to heterochronies, decreases the number of eggs in clutches and increases the time interval between spawnings. At the same time, hyperthyroidism in the parental pairs does not have any influence on the embryonic and early postembryonic development of offspring (hatching time, survival and frequency of developmental abnormalities). The obtained results give prospect for further studying the role of the thyroid signaling pathway in the regulation of ontogenesis in teleost fish.