| 蓝昭军,李强,赵俊,钟良明.2016.北江间（鱼骨）的年龄与生长特征.动物学杂志,51(3):373-383. |
| 北江间（鱼骨）的年龄与生长特征 |
| Age and Growth Characteristics of Hemibarbus medius in the Beijiang River |
| 投稿时间：2014-11-10 修订日期：2016-05-09 |
| DOI：DOI: 10.13859/j.cjz.201603005 |
| 中文关键词: 间（鱼骨） 年龄 生长 北江 |
| 英文关键词:Hemibarbus medius age growth Beijiang River |
| 基金项目:广东省科技计划资助项目(2005A20105001,2006B20701001,2006B20201002)；广东重大科技兴海(渔)资助项目(B200601G02)；广东省海洋渔业科技专项(A201001E04)；公益性行业(农业)科研专项经费资助(201303048)。 |
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| 中文摘要: |
| 于2007年4月至2009年3月间，在广东北江中上游地区采集间 （Hemibarbus medius）样本640尾，以鳞片作为年龄鉴定材料，对其种群的年龄与生长特征进行了研究。结果表明，间 鳞片上年轮结构清晰，前区主要表现为疏密型，而侧区主要为切割型；鳞片的边缘生长率表明，间 年轮的形成期主要为3 ~ 4月份。样本由0+ ~ 6+龄7个龄组组成，其中，雌性由1+ ~ 6+龄6个龄组组成，主要为1+ ~ 4+龄；而雄性由1+ ~ 5+龄5个龄组组成，主要为1+ ~ 3+龄；在4+ ~ 6+龄个体中，雌性显著多于雄性。体长（L，cm）与体重（W，g）的关系为W = 0.011L3.149（♀）、W = 0.011L3.135（♂），协方差分析表明，雌雄个体体长与体重关系的差异不显著，所有样本体长与体重的关系式为W = 0.011L3.148。体长与鳞长（R，mm）呈幂函数及直线关系，关系式分别为 L = 6.387 R 0.853、L = 4.569R + 2.587。拟合的Von Bertalanffy 生长参数为L∞ = 29.855 0 cm，k = 0.223 1，W∞ = 483.889 8 g，t0 =﹣0.928 2龄。对理论体长与实测体长、理论体重与实测体重进行χ2检验结果显示两者的差异均不显著，表明von Bertalanffy 生长方程能较好地拟合间 的生长。体重生长的拐点年龄为4.21龄，拐点体长约为20.37 cm，体重约为166.19 g。作为渔业保护对策，建议起捕年龄3龄以上或体长17 cm以上的个体。 |
| 英文摘要: |
| Hemibarbus medius is an important fish of fisheries in the Beijiang River. However, its biological characteristics are poorly known. In order to determine age and growth simulation of H. medius, 640 specimens were collected from April 2007 to March 2009 in the Beijiang River, Guangdong province. The scales were collected and used for age determination, the standard length, body weight were measured. The annual rings on the scales were formed primarily by the pattern of sparseness-denseness which was visible in the prezone region and the cut of the scales which was present on the rear-side region. The percentage of marginal increment at the scales in H. medius throughout the year showed that the annual rings of the scales mainly formed from March to April and it was formed once a year. The sex ratio of female to male is 1.23:1. The age of female was from 1+ to 6+, mainly in age of 1+, 2+, 3+and 4+, while the male was from 1+ to 5+, mainly in age of 1+, 2+ and 3+. However, there were much more females than males in age 4+-6+. The standard length of specimens ranged from8.4 to 24.3 cm, with the majority (86.20%) were less than 20cm. Body weight ranged from 10.06 to 318.80 g, but most fish (87.82%) were less than 150 g. The relationship between standard length and body weight was W＝0.011L3.149 for females , and W＝0.011L3.135 for males, and W = 0.011L3.148 for the combined sexes. Females and males did not exhibited statistically significant differences in growth. The relationship between standard length and scale radius (R) was L＝6.387 R 0.853 and L = 4.569R + 2.587. The von Bertalanffy growth arameters for combined sexes based on length-at-age data were L∞ = 29.855 0 cm, k=0.223 1 year?1, W∞ ＝483.889 8 g, and t0＝-0.928 2 year. The results of χ2-test shown that it had not statistically significant differences between the measured values of standard length, body weight and the estimated values of standard length and body weight derived from the Von Bertalanffy equations. Growth inflexion point were 4.65 years , when the standard length is about 21.3 cm, and weight 166.30 g. The standard length growth rate in von Bertalanffy functions gradually decreased with age, and the accelerated rate was below zero at all times and inclined to zero. The body weight growth rate in von Bertalanffy functions gradually increased before the growth inflexion point and then decreased, and the accelerated rate was above zero and decreased before the growth inflexion point, and then below zero. Our data suggest that the Hemibarbus medius population in Beijiang River had been overexploited. To protect the population and allow for sustainable utilization, we suggest only fish longer than 17 cm (age 3) should be harvested. |
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