鱼龄

4个鱼龄组的罗非鱼均有控藻效果，投放罗非鱼后水体藻类种类增加，3M及6M组藻类种类结构变得更加多样性。

The four age groups tilapia all have algae control efficiency , the algae species in water increased after tilapia was put in . 3M and 6M group algae species structure have a more diversity .

随着罗非鱼鱼龄的增大，胃蛋白酶和肠蛋白酶活性均增大。

As the tilapia age grows , protease activity of stomach and intestine increase .

基于统计学习的鱼龄识别方法的研究

Research of Fish Age Estimation Using Statistical Learning

绝对生殖力与鱼龄、体长、体重增长分别存在线性关系。

There is also linear relationship between absolute reproductive capacity and age , body length , body weight growth , respectively .

整个生长过程中蛋白酶活力处于绝对优势。180天鱼龄是大菱鲆生长发育的一个转折点，可作为大菱鲆配合饲料分阶段研制的一个参考分界点。

The dominant enzyme I > protease in all growth phases , and 180-day phase is the turning point during the growth of turbot .

在工程应用中，鱼龄及外界环境因素对鱼类的摄食行为有较大作用，进而影响鱼类的控藻效果。

In the engineering application , fish age and external environment factors have important affects to the feeding behavior of fish , then affect the algae control efficiency .

水丰水库的池沼公鱼一龄体长（到尾叉的体长，后同）74毫米，体重3克；

The fish is about 74 mm in fork length ( body length measured from tip of snout to the fork of caudal ) and 3g in body weight when one year old ;

山东半岛南部产卵场鳀鱼幼体日龄组成与生长

Daily age composition and growth rate of Japanese anchovy ( Engraulis japonicus ) larvae in the Southern Waters of Shandong Peninsula