Premium
Effect of salinity on carrying capacity of adult Nile tilapia Oreochromis niloticus L. in recirculating systems
Author(s) -
Kabir Chowdhury M A,
Yi Yang,
Lin C K,
ElHaroun E R
Publication year - 2006
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.1365-2109.2006.01605.x
Subject(s) - nile tilapia , oreochromis , salinity , biology , stocking , tilapia , zoology , biomass (ecology) , crop , fishery , agronomy , fish <actinopterygii> , ecology
Effect of salinity on carrying capacity of a recirculation system for Nile tilapia, Oreochromis niloticus L.; production was assessed. Survival, growth and feed conversion ratio of adult Nile tilapia fed 30% crude protein diet for 88 days were measured at three different salinity levels (8, 15 and 25 g L −1 ) and two stocking densities (20 and 40 m −3 ) in three independent recirculating systems. Highest survival (98%) and a linear growth in net biomass ( P <0.01) was observed in both densities at 8 g L −1 and in 20 m −3 treatment at 15 g L −1 . Highest net biomass growth was observed in the 40 m −3 stocking density treatment at 8 g L −1 salinity level ( P <0.05). Overall biomass growth was significantly affected by salinity indicating a decrease in Nile tilapia carrying capacity with increased salinity. About 11 000 kg ha −1 crop −1 of Nile tilapia can be obtained in recirculating systems at 8 g L −1 salinity, significantly higher than the net production at 15 g L −1 (5200 kg ha −1 crop −1 ) and 22 g L −1 (4425 kg ha −1 crop −1 ).