Tambaqui growth and survival when exposed to different photoperiods

Acta Amazonica

Paulo Henrique Rocha Aride²  Rodrigo Roubach¹  Sérgio Ricardo Nozawa¹  Adalberto Luís Val¹ 

[1] ,UNINILTON LINSManaus AM

关键词: Colossoma macropomum;    juvenile fish;    photoperiod;    growth;    Colossoma macropomum;    peixe juvenil;    foto período;    crescimento;   

DOI  :  10.1590/S0044-59672006000300015

来源: SciELO

【 摘 要 】

The use of different photoperiods (light) were investigated during tambaqui (Colossoma macropomum) juvenile growth under captivity. Light intensity tested was: continuous dark (24hrs without light), natural photoperiod simulation (10hrs of light and 14hrs without light) and continuous light (24 with light). No mortality was recorded among treatments. Significant differences was observed after 50 days of experiment among mean fish weight, fish kept under a continuous darkness showed a better specific growth rate (6.02%) when compared to control fish (natural photo period, 3.67%). Fish exposed to continuous light presented the lowest mean specific growth rate (2.04%). It is possible to improve tambaqui juvenile weight gain performance when kept under continuous darkness.

【 授权许可】

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