摄食水平和温度对军曹鱼幼鱼生长及氮收支的影响

doi:10.11978/j.issn.1009-5470.2014.02.005

Abstract

Abstract: Effects of ration (from starvation to satiation) and temperature (21℃, 27℃ and 31℃) on growth and nitrogen budget of young cobia (initial body weight about 10g) were studied, and the relationship between specific growth rate (SGR) and ration as well as temperature and the nitrogen budget were established in this paper. The results showed that at a given temperature, as ration increased, SGR increased significantly, exhibiting a linear pattern described as a simple function at 33℃ whereas a decelerating pattern described as a logarithmical equations at 27℃ and 21℃. At a given ration, except for starvation, as temperature increased, SGR increased or first increased then decreased, all described as quadric functions. At a given temperature, as ration increased, feed conversion efficiency (FCE) increased at 21℃ and 33℃ whereas first increased then decreased at 27℃. At a given ration (except for the starvation), as temperature increased, FCE increased or first increased then decreased and peaked at 27℃ for fish fed restricted food while there was no significant difference between 27℃ and 33℃ though FCE peaked at 33℃ for fish fed satiation. Over the experimental ration and temperature range excretion nitrogen of young cobia increased significantly with increasing ration and temperature.

Key words: young cobia Rachycentron canadum, ration, temperature, growth, nitrogen budget

CLC Number:

Q959.483

SUN Li-hua, CHEN Hao-ru. Effects of ration and temperature on growth and nitrogen budget of young cobia Rachycentron canadum[J].Journal of Tropical Oceanography, 2014, 33(2): 37-44.

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[25].

Effects of ration and temperature on growth and nitrogen budget of young cobia Rachycentron canadum

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