秋汛（9—12月）渤海中国对虾生长规律的初步研究

中国对虾(Pe(?) (?)talas Kishinouye)是中国北部沿海的重要经济虾类,本文研究了分布于渤海的中国对虾9～12月份的生长规律,结果为: 1、中国对虾的生长与蜕壳有密切关系,雄虾只进行“生长蜕壳”,到10月上旬以后,蜕壳基本停止.主要生长期结束.雌虾除了“生长蜕壳”之外,在10月下半月还要进行一次“生殖蜕壳”.其主要生长期约比雄虾延长近一个月,即到11月初结束. 2、生活于渤海的中国对虾个体的生长状况与其群体密度呈负相关关系.这一现象符合A.Buckmann氏提出的单纯增重量法则(the simple growth law)。 3、本文设计出用以计算雌、雄性个体自然大小差异较大的水生动物的“渔获尾数”和“渔获平均体重”的数学公式.并用此公式计算出1970～1972年渤海中国对虾在秋汛(9～12月)的各旬(月)被捕捞的准确尾数和个体大小,提出较合理的捕捞时间。

A Preliminary Study on the Growth Rhythm of Chinese Prawn (Penaeus orientalis Kishinouye) in the Bohai Sea

The growth thythm of Chinese penacid prawn (Penaeus orientalis kishinouye) conducted in the Bo-hai Sea between September and December was studied.1. The growth of Chines Prawn is closely related with their moulting. Males only moult for growth and the moulting ends up essentially after the first ten days of October. Besides moulting for growth females also moult for reproduction near the end of Octcber.thus the growth period of females is longer that of males for about one month.2. The size of the individual in this species is negatively correlated with the density of its population. This is in accordance with A. Buckmann's "the simple growth law".3. Formulas for calculating the catch number and the average body weight of the catch were derived. With these formulas the number and body size of individual of Chinese prawns in the Bohai Sea caught in every ten days in Autum Season (Sept.-Dec. ) were calculated and the relatively reasonable time for catching was given.