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globalchange > 过去全球变化的重建

DOI:	10.1371/journal.pone.0102168
论文题名:	Size Selection of Antarctic Krill (Euphausia superba) in Trawls
作者:	Ludvig A. Krag; Bent Herrmann; Svein A. Iversen; Arill Engås; Sigve Nordrum; Bjørn A. Krafft
刊名:	PLOS ONE
ISSN:	1932-6203
出版年:	2014
发表日期:	2014-8-8
卷:	9, 期:8
语种:	英语
英文关键词:	Fisheries science ; Fisheries ; Death rates ; Antarctica ; Confidence intervals ; Fishes ; Crustaceans ; Norwegian people
英文摘要:	Trawlers involved in the Antarctic krill (Euphausia superba) fishery use different trawl designs, and very little is known about the size selectivity of the various gears. Size selectivity quantifies a given trawl's ability to catch different sizes of a harvested entity, and this information is crucial for the management of a sustainable fishery. We established a morphological description of krill and used it in a mathematical model (FISHSELECT) to predict the selective potential of diamond meshes measuring 5–40 mm with mesh opening angles (oa) ranging from 10 to 90°. We expected the majority of krill to encounter the trawl netting in random orientations due to high towing speeds and the assumed swimming capabilities of krill. However, our results indicated that size selectivity of krill is a well-defined process in which individuals encounter meshes at an optimal orientation for escapement. The simulation-based results were supported by data from experimental trawl hauls and underwater video images of the mesh geometry during fishing. Herein we present predictions for the size selectivity of a range of netting configurations relevant to the krill fishery. The methods developed and results described are important tools for selecting optimal trawl designs for krill fishing.
URL:	http://journals.plos.org/plosone/article/file?id=10.1371/journal.pone.0102168&type=printable
Citation statistics:
资源类型:	期刊论文
标识符:	http://119.78.100.158/handle/2HF3EXSE/19825
Appears in Collections:	过去全球变化的重建影响、适应和脆弱性科学计划与规划气候变化与战略全球变化的国际研究计划气候减缓与适应气候变化事实与影响

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journal.pone.0102168.PDF（1787KB）	期刊论文	作者接受稿	开放获取	CC BY-NC-SA	View Download

作者单位:

DTU Aqua, Technical University of Denmark, Hirtshals, Denmark;SINTEF Fisheries and Aquaculture, Fishing Gear Technology, Hirtshals, Denmark;Institute of Marine Research, Bergen, Norway;Institute of Marine Research, Bergen, Norway;Aker BioMarine Antarctic AS, Oslo, Norway;Institute of Marine Research, Bergen, Norway

Recommended Citation:

Ludvig A. Krag,Bent Herrmann,Svein A. Iversen,et al. Size Selection of Antarctic Krill (Euphausia superba) in Trawls[J]. PLOS ONE,2014-01-01,9(8)

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