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Effects of day and night on swimming, grazing and social behaviours of rohu Labeo rohita (Hamilton) and common carp Cyprinus carpio (L.) in simulated ponds
Author(s) -
Rahman Mohammad Mustafizur,
Verdegem Marc,
Wahab Md Abdul,
Hossain Md Yeamin,
Jo Qtae
Publication year - 2008
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.1365-2109.2008.02007.x
Subject(s) - labeo , cyprinus , biology , grazing , carp , common carp , polyculture , zoology , fishery , grass carp , diel vertical migration , fish <actinopterygii> , ecology , aquaculture
Diel rhythmicity of grazing, swimming, resting and social interactions of rohu ( Labeo rohita ) (weight 66.5–68.3 g) and common carp ( Cyprinus carpio ) (79.9–82.0 g) were observed in 1 m 2 simulated ponds using video images. Fish behaviour was monitored during a full 24‐h period, starting at 08:00 hours with a 15‐min recording, which was repeated every 3 h. Rohu spent more time grazing during the day than at night. Grazing activity peaked at the beginning and at the end of the day. Grazing and resting of rohu were negatively correlated. Common carp grazed day and night, showing no distinct grazing peak. Considering the grazing time of rohu and common carp, a feeding schedule with two feeding times at 07:30 and 16:30 hours might be appropriate for better food intake and conversion in rohu–common carp polyculture system.