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   经济幼鱼 的翻译结果: 查询用时:0.273秒
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经济幼鱼
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  young economic fish
     This paper emphatically analyses economic young fish in one-peg stow nets in June so as to propose to adjust the fishing off season thus protecting resources of Young economic fish in the area.
     本文着重对6月份单根方作业经济幼鱼进行了分析,建议对定置作业休渔时间进行调整,以利于保护经济鱼类幼鱼资源。
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  “经济幼鱼”译为未确定词的双语例句
     The swing net injured economic species seriously, in which the economic juvenile representing 39.3% of the catch, especially in March, April and July with 52.8% to 74.0%.
     张网作业对闽南海区经济种类的损害较为严重,经济幼鱼、幼体在渔获物中所占的比重达39.3%,尤以张网禁渔期前后的3~4月和7月,经济幼鱼、幼体受损最为严重,其比重高达52.8%~74.0%。
短句来源
     INJURY DONE TO JUVENILE FISH BY THE METHOD TO ENHANCE PENAEUS CHINENSIS THROUGH RECAPTURE WITH BOTTOM TRAWL
     底拖网回捕增殖对虾对经济幼鱼的损害
短句来源
     Investigation Report on Impacts of Bag Net Operation to Adolescent Commercial Fish Species in Fujian Province
     福建张网作业损害经济幼鱼调查报告
短句来源
     For reducing the by-catch applying split net to TanZi net was put forward, including the rigging position and sloping angle of split net.
     并提出利用分离装置中的分离网片这项技术来减少经济幼鱼的混捕现象,在网口位置设置网帘,选择网帘和水平面的最佳角度,来防止兼捕混杂鱼和经济小鱼。
短句来源
     During the period of 1984~1986,1949.16 million juvenile prawns whose body length is above 3cm were marked synchronously in eight large bays a- long the coast of Southern Shangdong. 1400 million prawns were recaptured total- ly,among them, 1184. 7tons by bottom brawl. The average recapture rate is 9. 4 per- cents.
     1984~1986年在山东南部沿海八大港湾同步增殖放流体长3cm以上的虾苗14.9116亿尾,累计回捕增殖对虾1.4亿尾,平均回捕率为9.4%,其中拖网回捕增殖对虾累计为1184.7t,但损害的七种经济幼鱼累计为4402t,应引起重视这一问题。
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  相似匹配句对
     Investigation Report on Impacts of Bag Net Operation to Adolescent Commercial Fish Species in Fujian Province
     福建张网作业损害经济幼鱼调查报告
短句来源
     Knowledge Economy
     知识经济
短句来源
     Economic Intelligence
     经济动态
短句来源
     INJURY DONE TO JUVENILE FISH BY THE METHOD TO ENHANCE PENAEUS CHINENSIS THROUGH RECAPTURE WITH BOTTOM TRAWL
     底拖网回捕增殖对虾对经济幼鱼的损害
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Although the marine fishing yields of zhejiang have been decreasing in recent years, the output of the set-net is going on the increase,especially in south of zhejiang. But per net yield of it has been fluctuating or decreasing. In contradiction to decline of so called "the four species of home-fishes" in zhejiang with the exception of Trichiurus haumela,resouces of some small fishes such as Harpodon nehereus (Hamilton-Buchanan), Myctophum pterotum (Alock), Collichthys luoidus (richardson), are increasing. Utilization...

Although the marine fishing yields of zhejiang have been decreasing in recent years, the output of the set-net is going on the increase,especially in south of zhejiang. But per net yield of it has been fluctuating or decreasing. In contradiction to decline of so called "the four species of home-fishes" in zhejiang with the exception of Trichiurus haumela,resouces of some small fishes such as Harpodon nehereus (Hamilton-Buchanan), Myctophum pterotum (Alock), Collichthys luoidus (richardson), are increasing. Utilization of these species and shrimps being rich in reserves is positive aspect of the set-net. Main larvae of the valued fishes damaged by the set-net recently is Trichiurus haumela No matter the injured amount of it is less than that in 1960s, the gravity of damaging to larvae of set-net fishing is hign continuous. Hence it is still necessary to put the set-net under the control. Thus, we have formularized the amount of the set-net which could be fixed in certain sea area in according to several factors such as sea capicity, current discharge, conditions of fishing ground, requirment for navigation and protection larvae against damaging etc. As a result, that the amount of the set-net in zhejiang should be reduced by 20-30%, keeping the level within 100 thousand of piles. It is more appropriate for protecting valued larvae if the amount of the set-net would further be cut down.

浙江省近年来海洋捕捞总产量下降,而张网总产量却不断上升,可是张网单位产量出现了徘徊甚至下降的倾向。与浙江省传统的大、小黄鱼、乌贼等大幅度减产或波动情况相反,龙头鱼、风鲚、梅童鱼、细螯虾等却大量增加。张网在利用这些小型鱼、虾类的同时,大量损害着带鱼等经济鱼类幼鱼。本文分析了不同海区、不同月份、不同作业网具的损害经济幼鱼的情况,提出了控制张网数量、分别实行不同的禁渔规定等意见。

In this article, we report our observations and analysis for the structure of catches with set net in Bohai Bay and Laizhou Bay. There are more than 50 species with grape net and over 40 species with barrier net. They are mainly shrimps; the others are below 2%, of which the young of the main economic fishes and shrimp are over 0.1%, including Llisha elongta, Harengla zunasi, Clupanodon punclatus, Setipinna taty, Hugil cephalus, Mugil so-iug, Lateolabrax japonicus, Collichthys lucidas, Pseudosciacna polyactis,...

In this article, we report our observations and analysis for the structure of catches with set net in Bohai Bay and Laizhou Bay. There are more than 50 species with grape net and over 40 species with barrier net. They are mainly shrimps; the others are below 2%, of which the young of the main economic fishes and shrimp are over 0.1%, including Llisha elongta, Harengla zunasi, Clupanodon punclatus, Setipinna taty, Hugil cephalus, Mugil so-iug, Lateolabrax japonicus, Collichthys lucidas, Pseudosciacna polyactis, Nibea albiflora, Stromaleoides argenteus, Cynoglossus semilaevis, Penaeus orientalis, etc.

渤海湾与莱州湾西部,定置网的主要渔获物种类,挂子网50余种,樯张网40余种。主要捕捞对象是毛虾,其他种类大多都在2%以下。其中占0.1%以上的经济幼鱼、幼虾有鳓、青鳞、斑鰶、黄鲫、鲻、梭鱼、鲈、梅童鱼、小黄鱼、黄姑鱼、银鲳、半滑舌鳎和幼对虾等。毛虾等经济虾类和经济鱼类的主要出现时间,挂子网为7月11日—8月20日;樯张网为7月6日—8月25日。夏一世代毛虾产卵群体的主要死亡时间在8月中、下旬。经济幼鱼和幼对虾,挂子网从6月21日,樯张网从5月21日开始逐日增多,至8月20日以后出现的数量都很少。为合理利用毛虾资源,保护经济幼鱼、幼虾资源,根据调查结果并参看毛虾生殖期等有关文献资料,建议这两个海区的毛虾生产期,春汛挂子网应于6月20日,樯张网于5月20日结束,秋汛应于8月21日开捕为宜。禁渔期,挂子网应由原来的7月1日—8月31日调整为6月21日—8月20日;樯张网由原来的6月10日—8月31日调整为5月21日—8月20日较为合理。

During the period of 1984~1986,1949.16 million juvenile prawns whose body length is above 3cm were marked synchronously in eight large bays a- long the coast of Southern Shangdong. 1400 million prawns were recaptured total- ly,among them, 1184. 7tons by bottom brawl. The average recapture rate is 9. 4 per- cents. But, at the same time, 4402tons of economical juvenile fish of seven species was lost.It is time we should pay more attention to this problem.

1984~1986年在山东南部沿海八大港湾同步增殖放流体长3cm以上的虾苗14.9116亿尾,累计回捕增殖对虾1.4亿尾,平均回捕率为9.4%,其中拖网回捕增殖对虾累计为1184.7t,但损害的七种经济幼鱼累计为4402t,应引起重视这一问题。

 
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