文章摘要
崔建章,陆赤.围网底环纲张力的测试和分析[J].水产学报,1984,8(4):339~342
围网底环纲张力的测试和分析
TESTING AND ANALYZING OF THE TENSION ON BRIDLE FOR PURSE SEINE
  
DOI:
中文关键词: 上海市海洋渔业公司《沪渔386》轮大力支持
英文关键词: 
基金项目:
作者单位
崔建章 上海水产学院 
陆赤 上海水产学院 
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中文摘要:
      底环纲是有环围网的收缔纲索,在国内机轮围网的操作中,依靠近百条这样的绳索,将括纲的收括力传递给下纲,以封闭网具底部,围住鱼群。掌握它的张力值不但可为设计围网的收缔部分提供依据,而且可通过它的张力变化,间接地了解网具受力变化情况。我们于1982年9月实测了上海市海洋渔业公司一顶围网底环纲的张力以及各受力时刻下纲的下降深度。了解了底环纲张力值及其变化的初步规律。
英文摘要:
      The present paper describes a new subspecies of Caridina denticulata. Specimens were collected from a mUtinta,in stream in the Taiping County of Anhui Province in May 1982.Caridina denticulata anhuiensis, subsp. nov.The rostrum reaches to the first segment of the antennular pedunele;the dorsal border is mostly without tooth arad the lover border bears 1-2 teeth. The antero-lateral angle usually is without pterygostomian spine. Propodite of the third leg of the male is crooked, but the female is not; dactylus is stout and boars frequently 6--7 spinules. The outer uropod bears 16-18 spines.Remarks: The present. new subspecies closely resembles to the type form and all known subspecies, but there are some differences from them as follows: 1 .rostrumis rather short; 2 .the dorsal border of the rostrum is mostly without tooth; 3,the antero-lateral angles usually without .pterygostomian spine; 4.the dactylus of the 3th peraeopod bears less spines; 5. the outer uropod bears more spines.Type locality; Taiping County, Anhiu Province.
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