![]() The largest number of group attacks was observed with the background colors pink, blue and yellow, and purple to a lesser extent. In pairs, attacks occurred in greater numbers with white background color (8.50 ± 0.70) and fewer for yellow and purple (0.66 ± 0.57, p < 0.05). ![]() In addition, attacks behavior, types of attacks, and morphometric aspects related to cannibalism were described. The larvae were exposed to different tank colors and shelters (rocks and plastic vegetation), in pairs (2 larvae) and in groups (10 larvae). This study described cannibalistic attacks behavior in Tropical gar ( Atractosteus tropicus) larvae. Aggressivity expressed as cannibalism in fish larvae is a problem that limits the development of many species in aquaculture, therefore, understanding it and generating strategies to reduce its impact is important. ![]()
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