beam trawl

beam trawl的基本解释

-

桁拖网

与beam trawl相关的网络例句 [注：此内容来源于网络，仅供参考]

The major bycatch species of sergestid shrimp mid-trawl and planktonic shrimp mid-trawl was Trichiurus lepturus, while the Harpadon microchir and Gerres filamentosus were the main bycatch species for bottom shrimp trawl and shrimp beam trawl, respectively.

四种渔业混获与目标渔获比为1.93~15.08，以桁杆式虾拖网最高，其余三种渔业皆在3.3以下，正樱虾及中型毛虾中层拖网混获最多的种类为白带鱼，底层虾拖网为小鳍镰齿鱼，桁杆式虾拖网为曳丝钻嘴鱼。

Results showed that catches of shrimping beam trawl have many species in Estuary of Pearl River in the north South China Sea.

文章以珠江口铜鼓水道虾拖网渔业生物调查资料为基础，对该渔业的副渔获组成进行了分析研究。

A total of 175, 120, 136 and 149 species were caught by sergestid shrimp mid-trawl, planktonic shrimp mid-trawl, bottom shrimp trawl and shrimp beam trawl, respectively.

正樱虾中层拖网混获种数175种，中型毛虾中层拖网120种，底层虾拖网136种，桁杆式虾拖网149种，四种渔业混获种类合计高达347种，而总渔获种类有379种。

Study of the mesh selectivity of diamond and square mesh codend of two-stick swingnet;2. In order to assess the size selectivity for fishes of beam trawl fishing in offshore of the East China Sea,experiments of codends with different mesh configuration,including diamond mesh, square mesh and turned through 90° diamond mesh(T90) in 4 sea trials have been carried out and catch data were collected by comparative fishing method.

选择性分析结果显示，对于短吻舌鳎，横向使用的菱形网目网囊L50(50%选择体长)最大，而SR最小，菱形网目网囊L50最小，而SR最大；对于棘头梅童鱼和小黄鱼，菱形网目网囊的L50最小，SR最大，横向使用的菱形网目网囊L50最大，而方形网目网囊SR最小；除不同结构的网目扩张程度不同以外，鱼体体型结构的特殊性以及网囊结构也可能是导致选择性差异的主要原因。

The shrimp beam trawl fishery had the highest bycatch rate while those of the other three shrimp fisheries were less than 76.3%.

高屏峡谷周边海域为我国重要的虾拖网渔场，计有四种虾拖网渔业（正樱虾中层拖网、中型毛虾中层拖网、底层虾拖网及桁杆式虾拖网）在此作业。

与beam trawl相关的网络解释 [注：此内容来源于网络，仅供参考]

beam trawl：桁拖网

桡足幼体||copepodite, copepodid larva | 桁拖网||beam trawl | 铠装潜水||armored diving

beam trawl：横拖网

"梁理论","beam theory" | "横拖网","beam trawl" | "侧拖网渔船","beam trawler"

beam trawl; frame trawl：桁曳网

bead bobbin 卷框滚子{沈子纲用} | beam trawl; frame trawl 桁曳网 | beheaded fish 去头鱼

trawl beam：拖风承梁

trawl anchor 沙地锚 | trawl beam 拖风承梁 | trawl board 拖网承板