| 悬浮泥沙水体对穗花狐尾藻(Myriophyllum spicatum L．)光合荧光特性的影响 |
| |
| 引用本文： | 李强,王国祥,王文林,马婷,潘国权.悬浮泥沙水体对穗花狐尾藻(Myriophyllum spicatum L．)光合荧光特性的影响[J].湖泊科学,2007,19(2):197-203. |
| |
| 作者姓名： | 李强 王国祥 王文林 马婷 潘国权 |
| |
| 作者单位： | 中国水产科学研究院淡水渔业研究中心,无锡,214081 |
| |
| 基金项目： | 科技部科技基础条件平台建设计划 |
| |
| 摘 要： | 对1997-2005年长江口亲蟹汛期渔获规格和捕捞量进行了研究,并对资源量和最大持续产量进行了估算.亲蟹平均壳长、壳宽和体重分别为61 mm、66 mm和142 g,雌雄个体比例为1:2.16;同期亲蟹年均捕捞量为2.03 t,最大持续产量参考值为1.06 t.研究期内亲蟹个体规格差异过大,捕捞量变动剧烈且时间分布有前移趋势,捕捞量相关因子的年间变动没有显著规律.此外,插网作业方式应予以禁止或限制,九段沙附近水域的捕捞强度也应得到有效控制.
|
| 关 键 词： | 长江口 中华绒螯蟹 资源量 最大持续产量 长江口 中华 绒螯蟹 亲体 捕捞强度 现状 波动原因 the Changjiang River estuary fluctuation catch causes resource current 控制 水域 九段沙 作业方式 规律 相关因子 |
| 收稿时间： | 2006-03-15 |
| 修稿时间： | 2006-06-14 |
The influence of suspended sands on Myriophyllum spicatum L. photosysthetic fluorescence characteristics in turbid waters |
| |
| LI Qiang,WANG Guoxiang,WANG Wenlin,MA Ting and PAN Guoquan.The influence of suspended sands on Myriophyllum spicatum L. photosysthetic fluorescence characteristics in turbid waters[J].Journal of Lake Science,2007,19(2):197-203. |
| |
| Authors: | LI Qiang WANG Guoxiang WANG Wenlin MA Ting and PAN Guoquan |
| |
| Institution: | Freshwater Fisheries Research Center of the Chinese Academy of Fishery Sciences, Wuxi 214081 ,P. R. China |
| |
| Abstract: | Studies on capture sizes and catch in fishing season of brooders of mitten crab in estuary of the Changjiang River were carried out during 1997-2005,and at the same time current resource and MSY were esti- mated.Mean values of carapace length,width and body weight were 61mm,66mm and 142g respectively,and the proportion between female and male was 1:2.16.In the corresponding period,average yield was 2.03 tons and MSY evaluated by model of schaefer was 1.06 tons.In research time,yield fluctuated exquisitely and catch per- centage of November rose evidently.Besides,exorbitant differences of capture sizes in individuals and irregular fluctuation of correlative factors could also be found.To protect resource of mitten crab,immovable net fishing should be forbidden or restricted,and more attention should be paid to control the fishing intensity around the Jiud- uan alluvion.In conclusion,certain proposals are put forward.Further studies should be taken on spawning habits and trend of catch fluctuation of brooders of mitten crab in Changjiang River estuary.Integrated protect system may establish as soon as possible.At last,to strengthen management and insist on secure artificial propagation is re- quired. |
| |
| Keywords: | Estuary of the Changjiang River mitten crab resource MSY |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
| 点击此处可从《湖泊科学》浏览原始摘要信息 |
| 点击此处可从《湖泊科学》下载免费的PDF全文 |
|
