Studies on population structure and growth characteristics of Hypophthalmichthys molitrix in the Yichang to Jingzhou section of the middle branch of the Yangtze River

Abstract

PDF HTML阅读 XML下载 导出引用 引用提醒 长江中游宜昌-荆州江段鲢种群年龄结构和生长特征 DOI: 作者: 作者单位: 1. 中国水产科学研究院长江水产研究所, 湖北 武汉 430223;2. 西南大学动物科技学院, 重庆 400715;3. 华中农业大学水产学院, 湖北 武汉 430070 作者简介: 潘文杰(1992-),硕士研究生,研究方向为渔业资源与环境.E-mail:swuwenjie@126.com 通讯作者: 中图分类号: S931 基金项目: 国家重点研发计划项目（2018YFD0900902）；国家自然科学基金项目（51579247，31602161）；农业部财政项目. Studies on population structure and growth characteristics of Hypophthalmichthys molitrix in the Yichang to Jingzhou section of the middle branch of the Yangtze River Author: Affiliation: 1. Yangtze River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Wuhan 430223, China;2. College of Animal Science and Technology, Southwest University, Chongqing 400715, China;3. College of Fisheries, Huazhong Agricultural University, Wuhan 430070, China Fund Project: 摘要 | 图/表 | 访问统计 | 参考文献 | 相似文献 | 引证文献 | 资源附件 | 文章评论 摘要:鲢（）是长江重要经济鱼类之一，长江中游是其重要栖息地。为研究其种群现状，2016-2017年对长江宜昌-荆州江段鲢开展了周年调查，共采集鲢样品470尾。结果显示，鲢的年龄范围为1~7龄，体长范围为18.2~93.8 cm，优势年龄组为3~5龄（72.7%），优势体长组为40~70 cm（77.2%）；体长和体重关系式为=0.9297，=104.7[1-e-0.1603（+0.89）]2.7546；生长参数为=14.81 kg；鲢生长拐点为5.43龄，拐点体长和体重为=4.2753 kg。本研究表明长江中游鲢种群年龄结构得到了一定恢复，但生长性能出现衰退，建议加强鲢的种群及其栖息地的保护。 Abstract:is one of the important commercial fish in the Yangtze River, and the section between Yichang and Jingzhou is an important spawning ground and habitat of . In order to study its population status in this area, 470 samples were collected from the annual survey of H. molitrix has a relatively complex age structure, which contains 7 age classes ranging from 1 to 7. The preponderant age class was comprised of 3-5 year-old individuals, making up 72.7% of the total. Body-length range of the population was 18.2-93.8 cm, mainly between 40.0-70.0 cm (77.2%). The relation between body length and body weight was estimated as =0.9297, =470), for non-uniform motion pattern; Von Bertalanffy equations and the corresponding growth curves were calculated as W; growth parameters were estimated as =4.2753 kg growth inflection was 5.43 years, and inflection point length and inflection point weight were =4.2753 kg, respectively. The results showed that the population structure of was complex, but the growth performance had declined. Conservation of the population and habitat of this species should be prioritized. 参考文献 相似文献 引证文献