To investigate the influence of environmental enrichment on the growth and personalities of juvenile rock-fish Sebastes schlegelii,the growth performance(weight gain rate,and specific growth rate)and personal behavior traits(bravery,exploration,activeness,and aggressiveness)were investigated in the test fish with body weight of(7.25±1.89)g injected intraperitioneally with a passive integrated transponder(PIT)disposed in two plastics tanks of each 100 cm in length ×90 cm in width× 70 cm in height(environmental enrichment group,EE)and without(control group,C)irregularly shaped black reef of 50 cm diameter at water temperature of(14.26±0.12)℃ for 8 weeks.The results showed that there was no significant difference in weight gain rate and specific growth rate in the test fish between the EE and C groups,with significantly lower attack frequency in the EE group(44.44±9.30)than that in the C group(166.11±55.92)(P＜0.05).Correlation analysis revealed that the open ar-ea residence time ratio of the test fish was found to be positively correlated with the number of times they swam out of the sheltered area(P＜0.05).The time ratio of first approach to unfamiliar objects was shown to be negatively correlated with the time ratio of staying in open areas and the number of times swimming out of sheltered areas(P＜0.05),while it was positively correlated with the average distance from unfamiliar organisms(P＜0.05).It was found that there was significant reduce in the aggressiveness of the test fish in C group,without significant effect of environmental enrichment on the growth performance,bravery,exploratory ability,and activity of juvenile Sebastes schlegelii in C group.The test fish had positive correlation with bravery and exploratory nature,and did not have correlation with activity and aggressiveness,without correlation between the growth performance and individual be-havior indicators in the test fish.
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