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Description of a Stationary Drop-net for Estimating Nekton Abundance in Shallow Waters

 

作者: MartinA. Kjelson,   WilliamR. Turner,   GeorgeN. Johnson,  

 

期刊: Transactions of the American Fisheries Society  (Taylor Available online 1975)
卷期: Volume 104, issue 1  

页码: 46-49

 

ISSN:0002-8487

 

年代: 1975

 

DOI:10.1577/1548-8659(1975)104<46:DOASDF>2.0.CO;2

 

出版商: Taylor & Francis Group

 

数据来源: Taylor

 

摘要:

A 4 m2stationary drop-net capable of sampling the entire column of water in depths up to 1 m is described. The net is a modified purse seine constructed of 3-mm nylon mesh with top enclosed and hung from a frame 1 m above the surface. The net is dropped when support pins are released via a trip line from the shore. In 25 paired trials, the haul seine, with its greater area of coverage per haul (525 m2), captured more species than the drop-net, but the drop-net yielded estimates of a significantly higher density for fish and macrocrustaceans by individual species.

 

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