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Effect of temperature, stocking density and fish size on the ammonia excretion in palmetto bass ( Morone saxatilis × M. chrysops )
Author(s) -
Liu FuGuang,
Yang ShuennDer,
Chen HonCheng
Publication year - 2009
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.1365-2109.2008.02114.x
Subject(s) - stocking , biology , bass (fish) , morone saxatilis , zoology , morone , fishery
Abstract Three temperature levels (18, 23 and 28 °C), three stocking density levels (0.72, 1.42 and 2.84 kg m −3 ) and two sizes of groups (averaging 104 and 173 g respectively) were used to conduct experiments on the effect of temperature, stocking density and fish size on the ammonia excretion (AE) of palmetto bass ( Morone saxatilis × M. chrysops ). The AE increased with the increase in temperatures by a significant degree ( P <0.05) among different temperature groups. There appeared to be a tendency towards increase of the AE with increased stocking densities, and significant differences ( P <0.05) were found among stocking groups. The AE of smaller size‐group was significantly higher than that of the larger size‐group. Diurnal variation of AE in palmetto bass showed that the AE rose greatly to reach a peak at about 4 h after feeding, and to the lowest values at about 24 h post feeding in all of the experimental groups.