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Small‐scale fry production systems for Nile tilapia, Oreochromis niloticus (L.)
Author(s) -
MAIR G. C.,
ESTABILLO C. C.,
SEVILLEJA R. C.,
RECOMETA R. D.
Publication year - 1993
Publication title -
aquaculture research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.646
H-Index - 89
eISSN - 1365-2109
pISSN - 1355-557X
DOI - 10.1111/j.1365-2109.1993.tb00545.x
Subject(s) - oreochromis , biology , broodstock , incubation , nile tilapia , zoology , incubation period , fishery , aquaculture , fish <actinopterygii> , biochemistry
Experiments were conducted to evaluate and compare the production, quality and survival of eggs and the subsequent growth and survival of fry in two small‐scale production systems: natural incubation and egg collection followed by artificial incubation. Artificial incubation produced a significantly greater number and biomass of fry per unit weight of female broodstock ( P < 0·05). This was due to the significantly decreased spawning interval in females from which eggs were collected (mean = 23· days) compared to naturally incubating females (mean = 36·8 days). It is also hypothesized that survival during artificial incubation (85%) is greater than in natural incubation. Cost‐benefit analysis demonstrated a threefold increase in total net returns for artificial incubation.