DIRECT EFFECTS OF BEAMTRAWLING ON MACROFAUNA IN A SANDY SEDIMENT IN THE SOUTHERN NORTH-SEA

被引：165

作者：

BERGMAN, MJN

HUP, M

机构：

[1] Netherlands Institute for Sea Research (NIOZ), Den Burg Texel, 1790 AB

来源：

ICES JOURNAL OF MARINE SCIENCE | 1992年 / 49卷 / 01期

关键词：

D O I：

10.1093/icesjms/49.1.5

中图分类号：

S9 [水产、渔业];

学科分类号：

0908 ;

摘要：

The presence of certain species of benthic infauna in catches from a beamtrawl indicated that tickler chains and the ground chain can scrape off successive layers of sediment and reach at least 6 cm into the sediment. Direct effects of beamtrawling on benthic species in the North Sea were determined by comparing faunal abundance before and after commercial beamtrawling on a hard-sandy sediment. In autumn 1989 three-fold trawling of the experimental area resulted in a decrease in density (10-65%) of a number of species of echinoderms, polychaetes and molluscs. © 1992 International Council for the Exploration of the Sea.

引用

页码：5 / 11

页数：7