Evaluation of rainbow trout (Oncorhynchus mykiss) reproduction in Costa Rica. Part I.
DOI:
https://doi.org/10.15517/am.v14i1.11999Abstract
Upon a technical and
historical archive and the experience of a student.s long term
visit in the Centro Truchícola de Ojo de Agua de Dota
belonging to the Instituto Costarricense de Pesca y
Acuicultura (INCOPESCA), general aspects, environmental
conditions, management and reproductive behavior of the
iridescent rainbows trout, are described for Costa Rica, as
well as the advance of the male induction and triploid female
production program. Based on the diagnosis, the
effectiveness of the migratory instinct of the fish in semi
natural conditions, was evaluated considering egg and semen
quality, allowing a selection of 66 % of females and 83 % of
males as reproductive stock. Young, one kilogram females
lay between 1000 and 1500 eggs, two year olds weighting 1.5
kg between 1645 and 2500 and the three year old and 2 kg in
weight, approximately 3500. Egg weights fluctuate from 0.05
to 0.112 g and incubators survival rate range from 57 to
76.4%.
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