摘要
本文测定了移植于伊犁河的欧鲇(Silurus glaris Linnaeus)的形态、年龄与生长,观察了繁殖和食性等生物学特性,用Von.Bertalanffy生长方程等从理论上阐明生长特征。结果表明:河欧鲇在渔获物组成中的比例为:体长分布在16～121cm之间,以体长40～70为主,占60.36%;体质量在50～13400g之间,以500～20000 g为主,占56.7%;年龄为0+～8+,9个年龄组,以1+～3+龄为主,占65.1%。补充群体大于剩余群体,由Von.Berta-lanffy生长方程推导运算的生长参数为:L∞=191.1cm、W∞=59 875g、-k=0.087、to=0.038,tmax=34.5,tip=12.7。4+龄体长70 cm,体质量3500g的个体即可性成熟,6月份产卵,雄鱼有营巢和护卵孵化习性。为典型的肉食性鱼类。欧鲇生长快、个体大,适应能力以及扩展能力强,移植后极易形成群体,已成为伊犁河水系主要经济鱼类之一。
Biological study of Silurus glaris Linnaeus that was transplanted in Yili River before was conducted, including of morpholo- gy measurement, age and growth relationship, reproduction and feeding habit. Growth equation of this fish species was calculated based on Von .Bertalanffy＇s method. The fish catches composed of individuals with body length of 16-121 cm, mainly in 40-70cm （60.36%）, individuals with body weight of 50-13400g, mainly in 500-20000g （56.7%） and individuals at 0^＋-8^＋ years old, mainly at 1^＋-3^＋ ages （55.85%）. The number of recruit populations was more than that of residual populations. The growth parameters were L∞=191.1cm, W∞=59 875g, -k=0.087, t0=0.038, tmax=34.5 and trt=12.7, respectively. Silurus glaris were able to achieve sex maturity and reproduce in June every year as it growed 4^＋ years old, 70cm and 3500g. The male fish had habits of construction net and protection egg, which were behaviors of typical carnivore. This fish species have advantages of fast growth, big body, strong adaptation and ex- tensive abilities, and easy to form populations when transplanted, therefore, Silurus glaris had become one of ecological fish species in Yili River.
出处
《水产学杂志》
CAS
2012年第2期51-55,共5页
Chinese Journal of Fisheries
关键词
伊犁河
欧鲇
生物学
Yili River
Silurus glads
Biology
