...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>ICES Journal of Marine Science >Do big boats tow big nets?
【24h】

Do big boats tow big nets?

机译：大型船会拖网吗？

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Fishing vessel capacity for trawlers is generally expressed in terms of length, tonnage, and engine power, assuming that a larger vessel has a greater fishing power. Management uses effort-control measures such as kW-day limits based on this assumption. Many studies have shown a weak and noisy relationship between effort and modelled catches, and explanatory models often require the inclusion of a skipper or vessel effect to explain the variance. A key element in this effect is the choice of gear size. Relationships are investigated between metrics of the vessel (length, tonnage, and power) and the gear towed (length of groundgear, or circumference of the net opening) in Scottish and Irish whiteftsh, Nephrops, and pelagic otter trawlers. Often, the vessel size did not correlate with that of the gear, or did so only for smaller vessels (< 1000 hp). The key implication is that effort management based on vessel metrics alone is not appropriate, because it is a poor predictor for gear size, and hence for fishing power. Effort restrictions may actually encourage the adoption of larger gears for a given vessel, to maximize the value of a limited-time resource.
机译：假设较大的渔船具有更大的捕鱼能力，拖网渔船的捕鱼能力通常以长度，吨位和发动机功率来表示。管理层基于此假设使用努力控制措施，例如千瓦日限制。许多研究表明，努力与建模的捕获量之间的关系微弱而嘈杂，解释性模型通常要求包含船长或船只效应来解释差异。影响效果的关键因素是齿轮尺寸的选择。研究了苏格兰和爱尔兰的whiteftsh，Nephrops和远洋水獭拖网渔船的度量标准（长度，吨位和功率）与拖曳的齿轮（接地装置的长度或网孔的周长）之间的关系。通常，容器的大小与齿轮的大小不相关，或者仅对于较小的容器（<1000 hp）才相关。关键的含义是，仅基于船只指标的工作量管理是不合适的，因为这对于渔具大小（因此对于捕捞能力）而言是一个较差的预测指标。努力限制实际上可能鼓励给定船只采用更大的装备，以最大限度地利用限时资源。

著录项

  • 来源
    《ICES Journal of Marine Science》 |2011年第8期|p.1663-1669|共7页
  • 作者

    D. G. Reid; N. Graham; D. J. Rihan; E. Kelly; R. Gatt; F. Griffin; H. D. Gerritsen; R. J. Kynoch;

  • 作者单位

    Marine Institute, Rinville, Oranmore, Co. Galway, Ireland;

    Marine Institute, Rinville, Oranmore, Co. Galway, Ireland;

    Bord lascaigh Mhara, PO Box 12, Crofton Road, Dun Laoghaire, Co. Dublin, Ireland;

    Marine Institute, Rinville, Oranmore, Co. Galway, Ireland;

    Scottish Fishermen's Federation (SFF)/SFF Services Limited (SFFS), 24 Rubislaw Terrace, Aberdeen AB10 1XE, Scotland, UK;

    Marine Institute, Rinville, Oranmore, Co. Galway, Ireland;

    Marine Institute, Rinville, Oranmore, Co. Galway, Ireland;

    Marine Scotland, Marine Laboratory, PO Box 101, 375 Victoria Road, Aberdeen AB11 9DB, Scotland, UK;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    capacity; effort; fishing gear; fishing power;

    机译：容量;努力捕鱼装置;捕鱼能力;

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号