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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