Study On Compensatory Growth In Sebastes Schlegeli Juvenile

This study is about the compensatory growth of Sebastes schlegeli juvenile (average initial body weight 7.99±0.1g)under 17.5±0.5℃after starvation and refeeding for different days. Through the changes of character,the body component, the digestion enzyme activity have been studied in Sebastes schlegeli juvenile, discusses the countermeasure and mechanism of compensatory growth .The result is as follows:After starvation, the body weight, length, liver weight index, condition factor and specific growth rate decrease in the experimental group. After refeeding,the body character liver weight index, condition factor and specific growth rate have no significant difference with control group's until the end of experiment.In the period of refeeding,the specific growth rate of starvation group all exceeds the control group. The change of feeding rate is not obvious and that of food conversion efficiency is very obvious.After starvation, the content of crude lipid,crude protein, liver glycogen and muscle glycogen descends while the content of moisture and ash of Sebastes schlegeli juvenile ascends.After refeeding,the body component is no significant difference compared with control group's.The results indicate that the liver is the main organ stores energy of Sebastes schlegeli juvenile and what first uses is the glycogen and then it is the fat in hunger. From the change of the liver glycogen and muscle glycogen , Sebastes schlegeli juvenile first use liver glycogen ,then use muscle glycogen.When story energy,accumulate liver glycogen then muscle glycogen.After starvation,the activities of protease,trypsin, amylase and lipase of digestive tract in Sebastes schlegeli juvenile all decrease.And they all fall faster in the early period then later fall slower. After refeeding,the activities of all digestive enzyme fast and reach to the control group at the end of experiment.It could be seen from all above that Sebastes schlegeli juvenile shows compensatory growth over compensatory growth. It could be seen from the change of food conversion efficiency and feeding rate that the over compensation growth is mainly due to increased food conversion efficiency.Starvation should be avoided or reduced in breeding process of Sebastes schlegeli .It has important significance to feeding Sebastes schlegeli by scientific using of this physiological phenomenon.