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Issue:ISSN 1000-7083
          CN 51-1193/Q
Director:Sichuan Association for Science and Technology
Sponsored by:Sichuan Society of Zoologists; Chengdu Giant Panda Breeding Research Foundation; Sichuan Association of Wildlife Conservation; Sichuan University
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Your Position :Home->Past Journals Catalog->2010 Vol.29 No.3

Social Learning of Foraging Behavior in Juvenile Chinese Perch, Siniperca chuatsi
Author of the article:XIONG Yu-yu1,3, ZHU Si-hua2, ZENG Ke-wei2, XIA Ru-long2, CAO Wen-xuan1, LIU Huan-zhang 1*
Author's Workplace:(1. Institute of Hydrobiology, the Chinese Academy of Sciences, Wuhan 430072, China; 2. Institute of Fishery Research of Wuhan City, Wuhan 430070, China; 3. Graduate School of Chinese Academy of Sciences, Beijing 100049, China)
Key Words:Siniperca chuatsi; foraging behavior; social learning; local enhancement; response facilitation
Abstract:Social learning is an efficient way for group living animals to acquire novel behaviors from more experienced individuals. Juvenile Chinese perch, Siniperca chuatsi, can be trained in a group to accept manually cast dead fish preys. Strike behavior of naives was hypothesized as being improved by following or observing demonstrators that were striking at dead fish directly. 500 naives were assigned equally to an experimental group and a control group and an additional 50 pre-trained demonstrators were introduced into the experimental group. Naives of the two groups were trained to feed on dead fish for 6 trials with the group training method. In a training trial, they were provided 8-16 bouts of dead fish successively. In a feeding bout, approximate 50 subjects in the feeding shoal struck at dead fish preys successfully. So after 6 feeding bouts, almost every subject in the group had fed once. Group strike latency and group strike duration of the earlier 6 feeding bouts were measured. Though there was no significant difference between the two groups in mean group strike latency of the 6 trials, mean group strike latency of the experimental group was more stable than that of the control group over 6 trials. Mean group strike duration of both groups declined over trials in a similar fluctuating manner, however, the mean group strike duration of the experimental group was shorter than that of the control group, and the difference between the two groups was significant at the 1st ,5thand 6th trials. Furthermore, mean group strike duration of the experimental group had been reduced to the shortest and became stable at the 5th trial, while that of the control group was still long and unstable at the 6th trial. The results suggested that naives were attracted to the water’s surface and facilitated to strike at dead fish preys by demonstrators. We proposed that feeding at the water’s surface was learned through classical conditioning and aided by local enhancement social learning process, while striking at dead fish directly after approaching was learned through operant conditioning and improved by response facilitation social learning process. The results indicate that juvenile Chinese perch can learn socially, and social learning can facilitate the foraging behavior of weaning Chinese perch on dead fish preys.
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