A study on the age and growth of Lake Anchovy (Coilia ectenes taihuensis Yuen et Tin) in Taihu Lake |
| |
Authors: | Sun Xuexing |
| |
Institution: | (1) Freshwater Fisheries Research Center, the Chinese Academy of Fishery Sciences, China |
| |
Abstract: | Scales of the Lake Anchovy in Taihu Lake are used as a basis for its age determination. Annual variation of scale edge growth
rate (α) indicates that the annulus forms once a year, mainly in April–June. The relationship formula for body length and
scale diameter is L=18.658+118.06R, that for body length and weight isW♀=7.588×10−6
L
2.8301;W♂=5.584×10−6
L
2.8781. The fish before age II have a higher relative growth rate in body length and weight and a higher growth index. Growth is
consistent with the growth equation by Von Bertalanffy. The turning point of the body weight growth curve is located between
age II and III; the exact position is atW=0.292W
∞. Variation specificity of the growth course can be reflected by the growth rate and its acceleration curves. Time for capture
of the fish should preferably be after age II, when they have reached a body length of 170 mm. That is one of the key measures
to increase Lake Anchovy production in Taihu Lake. |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |
|