| 摘要: |
| 采用经典的Von Bertalanffy生长方程和数理统计的方法，于2001–20022年在中俄界湖兴凯湖采集翘嘴鲌，对其生长特性进行了研究。结果表明翘嘴鲌体长和体重的关系为W=0.0077L3.1(r=0.9881)，Von Bertalanffy生长方程为Lt=153.2[1–e-0.05(t+1)]；Wt=42000.3×[1–e-0.05(t+1)]3.1，体重生长拐点t=17.6龄，相应的体长为95.3cm，体重为12706.6g。按生长指标值分析，阶段生长可划分为两个时期，即17.6龄前的生长迅速期和17.6龄后的生长减缓期。因此，为了保护翘嘴鲌鱼类资源，天然渔业的捕捞个体规格应控制在5000g以上。 |
| 关键词: 翘嘴鲌 生长速率 生长方程 兴凯湖 |
| DOI： |
| 分类号: |
| 基金项目:国家科技部“十五”重点资助项目 ,2000DIB50183号 |
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| GROWTH CHARACTERISTICS OF SKYGAZER CULTER ALBARNUS IN XINGKAI (KHANKA) LAKE |
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ZHAN Pei-Rong1,2, ZHAO Ji-Wei1,2, DONG Chong-Zhi1,2, ZHAO Chun-Gang1,2
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1.Heilongjiang River Fisheries Research Institute, Chinese Academy of Fishery Sciences;2.Heilongjiang Basin Fishery Ecology Monitoring Center, Ministry of Agriculture, Haerbin,150070
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| Abstract: |
| Xinkai (Khanka) Lake is situated near Mishan City, Heilongjiang Province, Northeast China. The lake strides across the China/ Russia border, between 132°10′–132°50′ and 44°31′–45°30′ and 69 above sea level. Total area of the lake is 4380km2 of which 1200km2 is in Chinese side where average depth is 4m with the deepest 10m. The lake water runs into the Okhotsk Sea via Wusuli (Ussuri) River and Heilongjiang River Culter albarnus Basilewsky is an important natural and commercial pikes in the lake. However, research on the species is so far insufficient. In this paper, 130 fish specimens were collected and investigated during 2001–2002. To determine fish age, bio-statistical analysis was used. For each fish, 5–7 scales from fish backs were taken and put in clear water for microscopic observations on scale annularity rings. In order to analyze relationship between weight and length, a formula W =aLb was used. Growth rate was calculated using Von Bertalanffy equation, for body length by Lt =L∞[eKL(t-t0)] and body weight by Wt =W∞[eKW(t-t0)]b. Weight instantaneous growth rates were calculated by GW =(lnW2–lnW1)/(t2–t1), length instantaneous growth rates by GL =(lnL2–lnL1)/(t2–t1), growth index by GLt =[(lgL2–lgL1)/0.4343(t2–t1)]L1, length backward calculation by LnR=LRn. Results show that relationship between body length, L(cm), and body weight, W(g), can be expressed in W =0.0077L3.1 (r = 0.9881). Lengths of the fish caught were between 18 and 86 cm, of which 30 to 31cm ones occupied 16.4%, 22 to 23cm 13.9%. Weights of the fish were between 75 and 475g, of which 125 to 174g ones accounted for 23.0%, and 75 to 124g 17.2%. Ages of the fish were from 1 to 7 years, among them 2 to 3 constituted 40%, and 4 year old fish 18%. Through observation and statistical analysis of the total catch, C. alburnus was found to be the main species. During the spawning season C. alburnus accounted for 52% of the catch and accounted for 70% of the total catch weight. The Von Bertalantty equations for the species were as follows:L∞ =153.2cm, W∞ =42000.3g, length growth coefficient KL =0.05, weight growth coefficient KW =0.06. Starting point age t0=–1. Lt =153.2[1–e–0.05(t+1)]; Wt =42000.3[1–e–0.06(t+1)]3.1, the growth inflect ion point was at t= 17.6 years, corresponding to L = 95.3cm, and W =12706.6g. This data suggests that fish grow was much faster before 17.6 years of age than after 17.6 years of age. Differences in relative growth rate, instantaneous growth and growth indexes also show the same trend. Based on these research results, it is suggested that in order to sustainably utilize and protect fishery resources, catch weigh of C.alburnus should be above 5000g in Xingkai Lake. |
| Key words: Culter albarnus Basilewsky, Growth rate, Growth equation, Xingkai (Khanka) Lake |
