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Self-feeding activity of a pleuronectiform fish, the barfin flounder |
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| Authors: | Toshikazu Sunuma Masafumi Amano Takeshi Yamanome Kiyoshi Furukawa and Kunio Yamamori |
| Institution: | aSchool of Fisheries Sciences, Kitasato University, Ofunato, Iwate 022-0101, Japan bIwate Fisheries Technology Center, Kamaishi, Iwate 026-0001, Japan cDepartment of Aquatic Bioscience, Graduate School of Agriculture and Life Science, The University of Tokyo, Bunkyo, Tokyo 113-8657, Japan |
| Abstract: | The self-feeding activity of the barfin flounder (Verasper moseri) was examined under natural photoperiod and temperature. The experiment, carried out over 12 weeks from September to December, involved tagged fish (mean body weight: 371 g) reared in three 1000-l tanks (3 or 5 fish per tank) with a self-feeder device. The sensor comprised a switch and trigger string with a bead. Self-feeding activity was recorded in all tanks from day 1. The fish fed mostly at night. Strong positive correlations were observed between the number of daily feeder activations and water temperature/photoperiod, and all fish grew during the experiment. These results demonstrate that barfin flounder can operate self-feeding systems and it is suggested that self-feeding activity is influenced by photoperiod and water temperature. |
| Keywords: | Verasper moseri Demand feeder Feeding rhythm Flatfish culture |
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