1. 农业部长江下游渔业资源环境科学观测实验站, 中国水产科学研究院 内陆渔业生态环境和资源重点开放实验室, 中国水产科学研究院 淡水渔业研究中心, 江苏 无锡 214081;2. 中国水产科学研究院 渔业机械仪器研究所, 上海 200092
刘凯(1980−), 男, 副研究员, 研究方向为渔业生态学. E-mail: liuk@ffrc.cn
S966
农业部公益性行业科研专项(201203065); 农业部渔业种质资源保护项目(2010-2012); 中央级公益性科研院所基本科研业务专项项目(2011JBFA06).
1. Scientific Observing and Experimental Station of Fishery Resources and Environment in the Lower Reaches of Yangtze River, Ministry of Agriculture; Key Laboratory of Ecological Environment and Resources of Inland Fisheries, Freshwater Fisheries Research
洄游群体渔获规格及汛期特征进行了调查研究。18.5 kg; , ; 65.80%~ 80.54%74.35%; 2006单船全汛期捕捞量呈波动上升趋势年峰值出现于111237.92%~72.81%。各年汛期内初汛期渔获物中大规格个体所占比例较高随着汛期后延总体渔获规格呈下降趋势雌雄比例相对接近。水温和潮汛与捕捞量关系密切附近时开始进入旺汛期调查期间小潮期捕捞量占汛期总捕捞量的比例显著高于大潮期95.79%(200873.41%(2010
Eriocheir sinensis during the fishing season in Jiuduansha, Yangtze River estuary, between 2006 and 2011. The annual yield ranged from 93.3 to769.5 kg/ship (mean: 481.5 kg); the average daily catch ranged from 6.2 to 26.5 kg (mean: 18.5 kg); the total number of crabs captured ranged from 984 to 7 547 (mean: 4 129); the average individual weight ranged from 89.5 to 114.5 g/ind (mean: 100.7 g/ind); the percentage of male crabs ranged from 65.80% to 80.54% (mean: 74.35%); and the average yield of the ships tended to fluctuate among seasons, but generally increased over time with a peak in 2010. The average harvest weight declined after initially increasing, and peaked in 2008. The maximal daily catch generally occurred in early December, but was as early as November 24 (in 2009) and as late as December 12 (in 2010). The percentages of fishing occurring in the early fishing season, peak fishing season, and late fishing season ranged from 4.25%–38.48%, 37.92%–72.81%, and 1.77%–34.00%, respectively. At the beginning of fishing season, the large crabs constituted a higher percentage of the catch and male crabs were more abundant than females. However, the quantity of small crabs in the harvest increased and the size of crabs tended to decrease over time during the seasons. Furthermore, the percentage of female crabs in the harvest increased during the season, resulting in a similar total harvest of male and female crabs. The total catch was significantly correlated to water temperature and tides. Typically speaking, the peak fishing season period starts when the water temperature reaches ~13and the maximal daily catch occurs in temperatures ranging from 10–13.5 The majority of harvest occurred during low tides (maximum: 95.79% in 2008, minimum: 73.41% in 2010).
刘凯,汤滔,段金荣,徐东坡,张敏莹,周彦锋,方弟安,施炜纲.长江口九段沙水域中华绒螯蟹汛期特征及影响因子[J].中国水产科学,2013,20(3):614-623
LIU Kai, TANG Tao, DUAN Jinrong, XU Dongpo, ZHANG Minying, ZHOU Yanfeng, FANG Dian, SHI Weigang. Population characteristics and factors affecting the Chinese mitten crab fishery in Jiuduansha, Yangtze River Estuary[J]. Journal of Fishery Sciences of China,2013,20(3):614-623
