...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Estuarine Coastal and Shelf Science >Long-term trends in the structure of eastern Adriatic littoral fish assemblages: Consequences for fisheries management
【24h】

Long-term trends in the structure of eastern Adriatic littoral fish assemblages: Consequences for fisheries management

机译：东部亚得里亚海沿岸鱼类群落结构的长期趋势：渔业管理的后果

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

Long-term interannual changes in abundance, biomass, diversity and structure of littoral fish assemblages were examined between 1993 and 2009 by experimental trammel net fishing up to six times per year, within the warm period - May to September, at multiple areas along the eastern Adriatic coast with the aim of testing for the consistency of patterns of change across a large spatial scale (~600 km). The results revealed spatially consistent increasing trends of total fish abundance and biomass growing at an average rate of 15 and 14% per year, respectively. Of the diversity indices analysed, the same pattern of variability was observed for Shannon diversity, while Pielou evenness and average taxonomic distinctness measures Δ* and Δ~+ showed spatial variability with no obvious temporal trends. Multivariate fish assemblage structure underwent a directional change displaying a similar pattern through time for all the areas. The structural change in fish assemblages generally involved most of the species present in trammel net catches. A large pool of fish species responsible for producing the temporal pattern of assemblage change was relatively different in each of the areas reflecting a large geographic range covered by the study. An analysis of 4 fish species {Symphodus tinea, Pagellus erythrinus, Mullus surmu-letus, Scorpaena porcus) common to each of the study areas as the ones driving the temporal change indicated that there were clear increasing trends of their mean catches across the years at all the study areas. A common pattern among time trajectories across the spatial scale studied implies that the factor affecting the littoral fish assemblages is not localised but regional in nature. As an underlying factor having the potential to induce such widespread and consistent improvements in littoral fish assemblages, a more restrictive artisanal fishery management that has progressively been put in place during the study period, is suggested and discussed.
机译：在1993年至2009年之间，通过在东部5月至9月的温暖期内，每年进行多达6次的实验性锥虫网捕鱼，对沿海鱼类种群的丰度，生物量，多样性和结构进行了长期的年度变化。亚得里亚海海岸旨在测试大空间尺度（〜600 km）内变化模式的一致性。结果表明，总鱼类丰度和生物量的空间一致性增长趋势分别以每年15％和14％的速度增长。在分析的多样性指数中，香农多样性观察到相同的变异性模式，而Pielou均匀度和平均分类学差异性度量Δ*和Δ〜+显示出空间变异性，没有明显的时间趋势。多元鱼类组合结构经历了方向变化，所有区域的时间显示出相似的模式。鱼群结构的变化通常涉及流浪网捕捞中存在的大多数物种。在每个区域，负责产生组合变化时间模式的大量鱼类物种相对不同，反映了该研究覆盖的较大地理范围。对每个研究区域共有的4种鱼类（Symphodus tinea，Pagellus erythrinus，Mullus surmu-letus，Scorpaena porcus）进行分析，发现它们是随时间变化的驱动因素，表明它们在这些年份的平均捕获量呈明显的增长趋势。所有研究领域。在所研究的空间尺度上，时间轨迹之间的共同模式暗示着影响沿海鱼类组合的因素不是局部的，而是区域性的。作为潜在的因素，有可能在沿海鱼类种群中引起如此广泛而持续的改善，建议并讨论了在研究期间逐步实行的限制性更严格的个体渔业管理。

著录项

  • 来源
    《Estuarine Coastal and Shelf Science》 |2011年第3期|p.263-271|共9页
  • 作者

    N. Staglicic; S. Matic-Skoko; A. Pallaoro; R. Grgicevic; M. Kraljevic; P. Tutman; B. Dragicevic; J. Dulcic;

  • 作者单位

    Institute of Oceanography and Fisheries, Mestrovicevo setaliste 63, P.O. Box. 500, 21000 Split, Croatia;

    Institute of Oceanography and Fisheries, Mestrovicevo setaliste 63, P.O. Box. 500, 21000 Split, Croatia;

    Institute of Oceanography and Fisheries, Mestrovicevo setaliste 63, P.O. Box. 500, 21000 Split, Croatia;

    Institute of Oceanography and Fisheries, Mestrovicevo setaliste 63, P.O. Box. 500, 21000 Split, Croatia;

    Institute of Oceanography and Fisheries, Mestrovicevo setaliste 63, P.O. Box. 500, 21000 Split, Croatia;

    Institute of Oceanography and Fisheries, Mestrovicevo setaliste 63, P.O. Box. 500, 21000 Split, Croatia;

    Institute of Oceanography and Fisheries, Mestrovicevo setaliste 63, P.O. Box. 500, 21000 Split, Croatia;

    Institute of Oceanography and Fisheries, Mestrovicevo setaliste 63, P.O. Box. 500, 21000 Split, Croatia;

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

    long-term; spatio-temporal; littoral fish assemblages; fisheries management; artisanal fisheries;

    机译：长期;时空沿海鱼类群;渔业管理;手工渔业;

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