Visual communication stimulates reproduction in Nile tilapia, Oreochromis niloticus (L.).
作者： A.L.S. Castro , E. Gonçalves-de-Freitas , G.L. Volpato , C. Oliveira
DOI: 10.1590/S0100-879X2009000400009
关键词:
摘要: Reproductive fish behavior is affected by male-female interactions that stimulate physiological responses such as hormonal release and gonad development. During interactions, visual chemical communication can modulate reproduction. The aim of the present study was to test effect interaction on development reproductive cichlid Nile tilapia, Oreochromis niloticus (L.). Fifty-six pairs were studied after being maintained for 5 days under one four conditions (N = 14 each condition): 1) contact (V); 2) (Ch); 3) (Ch+V); 4) no sensory (Iso) - males females isolated. We compared (nesting, courtship spawning) gonadosomatic index (GSI) all conditions. Visual enhanced frequency in (mean ± SEM; V: 24.79 3.30, Ch+V: 20.74 3.09, Ch: 0.1 0.07, Iso: 4.68 1.26 events/30 min; P < 0.05, two-way ANOVA with LSD post hoc test), induced spawning (3 V also 3 Ch+V condition), increased GSI 1.39 0.08, 1.21 1.04 0.82 0.07%; test). Chemical did not affect nor it enhance effects contact. Therefore, an effective cue, which stimulates reproduction among tilapia.
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