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Use of Underground Brackish Water for Reproduction and Larviculture of Rainbow Trout, Oncorhynchus mykiss

Author:
Mohammadi, M., Sarsangi, H., Askari, M., Bitaraf, A., Mashaii, N., Rajabipour, F., Alizadeh, M.
Source:
Journal of applied aquaculture 2011 v.23 no.2 pp. 103-111
ISSN:
1545-0805
Subject:
Oncorhynchus mykiss, brackish water, eggs, freshwater, gonads, rearing, reproduction, salinity, semen
Abstract:
Broodfish were reared for 6 months in underground brackish water (11 ppt), and the quality of eggs and semen was evaluated in comparison to broodfish held in fresh water. Fry produced by the broodfish in brackish water (S) and freshwater (F) were then reared in different salinities (1, 4, 7, and 10 ppt). Broodfish successfully matured and spawned in underground brackish water, and gonad quality was better than of the broodfish in fresh water (p < 0.01). Growth indices of fry produced by both groups decreased with increasing salinity (p < 0.01). Survival was not affected by the salinities tested. Underground brackish water can be used as a source to induce successful sexual maturation and to produce high-quality gonads.
Agid:
298761