检索规则说明:AND代表“并且”;OR代表“或者”;NOT代表“不包含”;(注意必须大写,运算符两边需空一格)
检 索 范 例 :范例一: (K=图书馆学 OR K=情报学) AND A=范并思 范例二:J=计算机应用与软件 AND (U=C++ OR U=Basic) NOT M=Visual
作 者:庄平[1] 柯福恩[1] 危起伟[1] 罗俊德[1] 杨文华
机构地区:[1]中国水产科学研究院长江水产研究所,沙市434000
出 处:《淡水渔业》1991年第6期8-11,共4页Freshwater Fisheries
摘 要:渔业增殖工作包括重点保护增殖底栖杂食性鱼类,合理控制利用凶猛鱼类,移植引进鱼类新品种以及投放大规格鲢、鳙鱼种等综合措施.总渔获量由1985年的250吨,增至1990年的881吨.底栖杂食性鱼类由占渔获物总量的29.1%上升为46.1%,肉食性凶猛鱼类由62.5%降至34.8%。移植入库的太湖新银鱼已能在库中自行繁衍。This paper reports the exploitation of Fushui Reservior (5, 500hactors) inextensive fisheries. The easures of fish stock increasing can be summarized as follows: (1) Protectionand multiplication of bottom omnivore fishes. (2) Population control and rational utilization ofcarnivorous fishes. (3) Stocking of the fingerlings of silver and bighead carps. (4) TransplantingNeosalanx taihuensis Chen to the reservior.By 1990, the fish catch had reached to 881 tons, a more than 3. 5-fold increase over 1986. Thechanges of species composition in the catch were (1) bottom omnivore fishes had increased to 46. 1from 29. 1%, (2) carnivorous fishes had reduced to 34. 8% from 62. 5%.
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在链接到云南高校图书馆文献保障联盟下载...
云南高校图书馆联盟文献共享服务平台 版权所有©
您的IP:216.73.216.229