Description of the annual reproductive cycle of wreckfish; Polyprion americanus, in captivity
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AuthorsPapadaki, María; Peleteiro, J. Benito; Álvarez-Blázquez, B. (Blanca); Rodríguez-Villanueva, José L.; Linares, Fátima; Vilar, Antonio; Pérez-Rial, Evaristo; Lluch, Nuria; Fakriadis, Ioannis; Sigelaki, Irini; Mylonas, Constantinos C.
Keywordswreckfish, reproduction, annual cycle, captivity
Successful spontaneous reproduction and the production of viable offspring of wild fish in captivity can take some years of adaptation, and may also involve different environmental conditions, sex ratios and densities compared to natural populations. We followed the reproductive cycle of wreckfish Polyprion americanus—a late maturing, deep-sea benthic species—in captivity in three different broodstocks in Spain under natural photoperiod and temperature, and one broodstock in Greece under a constant temperature of 16 °C for two consecutive years, to describe the reproductive cycle of the species and the associated sex steroid hormone profiles. Oogenesis begun in the fall and post-vitellogenic oocytes of 1250 μm were present between March and June. Males were in spermiation condition and produced good-quality sperm throughout the year, regardless of the temperature profile to which they were exposed. Some females completed oogenesis, underwent oocyte maturation, and spawned spontaneously ...
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