工厂化养殖的大菱鲆生长特性

对工厂化养殖的大菱鲆生长特性进行了研究,结果表明:其生长旺盛期在2龄,日生长最快达13.52g·d-1,平均为6.84g·d-1,养殖250d以上其平均体重可达500g左右,1周年达1000g,2周年达3000g。其体长和体重的关系为W=0.0314SL3.0972,全长和体长的关系为TL=1.1839SL+0.5012,体高与全长的关系为BD=0.8512TL-1.0358。von-Bertalanffy生长方程分别是Lt=49.2294(1-e-0.7106(t+0.2211)),Wt=6186.2350(1-e-0.7106(t+0.2211))3.1609,体重生长拐点年龄1.3984,参照生物学指标,大菱鲆应该在拐点后上市,它符合经济原则及人们的消费习惯。

Growth characteristics of intensively cultured Scophthalmus maximus

A study has been carried out on growth characters of industrially farmed turbot, Scophthalmus maximus L. The results showed that the maximum growth rate of 13. 52g ..d- 1 appeared on two..year..old f ish and the average growth rate is 6. 84g..d- 1. The body weight could reach more than 500g after 250 days, 1000g af ter one year, and 3000g after 2 years. The relat ionship of the body length and the weight isW= 0. 0314SL3. 0972, and the relationship of total length and body length is TL= 1. 1839SL+ 0. 5012; BD= 0. 8512TL- 1. 0358 showed the relationship between body depth and total length. Von..Bertalanf fy equation is Lt = 49. 2294 ( 1 - e- 0. 7106 ( t 0. 2211) ) , Wt= 6186. 2350( 1- e- 0. 7106 ( t 0. 2211) ) 3. 1609, the growth f lection point of the body weight locates on 1. 3984, the industrially farmed turbot should be harvested after the growth flection point , which matches both economy principle and consumption habit. In addition, growth difference was analyzed between nature and farmed groups by growth character index .... integrated with K and L.. . The result s showed that farmed group grew significantly faster than natural group since there are better conditions under artificial control.