摘要
一、目的和意义 太湖短吻银鱼Neosalanx tangkahkeii taihuensis Chen为太湖中的名贵鱼类之一,也是太湖中的优势种类之一。调源丰富,产量较高。渔产品除供应国内市场外,又为我国主要出口水产品之一。根据过去记载,渔产量不断提高,尤以今年上半年又获较大丰收(接近100万斤),就春季繁殖生长的个体,在银鱼汛期的种群分析中占有一半左右(另一半为秒季繁殖的个体)。由于这一鱼类古今中外久享盛名,目前已列入国家水产资源中的重点繁殖保护对象之一。关于它在春季生殖时期的发育和孵化规律方面,目前尚缺乏参考资料。为此。
In the present paper, the early development of short-snout ice-fish, Neosalanx tangkahkeii taihuensis Chen, has been described in detail and the temperature between 10.9-18.9℃ has been studied in relation with incubation of its eggs in spring during the years 1976-1981 in lake Taihu.1. The early development of short-snout ice-fish may be devided into twenty-one stages.2. The developing embryo in the egg membrane has been observed to have turned to an angle of 90?from cleavage to blastula stage.3. The correlation between incubation time and temperature is a significant negative one, H=atb, and may be expressed by:H=18535.30t-1.823or logH= 4.2680 - 1.8230logt4. According to the above formula, incubation time may be deduced from any temperature for short-snout ice-fish at breeding season in spring in lake Taihu.
出处
《生态学报》
CAS
1982年第1期67-76,共10页
Acta Ecologica Sinica
