Abstract: Taking juvenile Scophthalmus maximus (initial wet weight 7.56±0.03 g) as test object, an experiment was conducted on its growth and biochemical components under effects of different ration level (1.0%, 1.5%, 2.0%, and satiation) and feeding frequency (once a day, twice a day, and three times a day) at 17-19 ℃. With increasing ration level, the juvenile final weight, relative rate of body weight gain, and feeding rate all increased significantly (P<0.05). The specific growth rate had a linear increase with ration level; the feed conversion efficiency in wet weight, dry matter, protein, and energy decreased after an initial increase with increasing ration level; whereas the juvenile biochemical components and the apparent digestibility among groups were less affected by ration level (P>0.05). With increasing feeding frequency, the juvenile final weight, relative rate of body weight gain, specific growth rate, and feed conversion efficiency decreased after an initial increase, with the maximum at the feeding frequency of twice a day. No significant differences were observed in the apparent digestibility and biochemical composition among different feeding frequencies (P>0.05).

Key words: camera trap, artificial nest, nest predation, Syrmaticus reevesii.