SISP 10 %E2%80%93 Revision 11_Manual for the North Sea International Bottom Trawl Surveys.pdf (6.02 MB)
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SISP 10 – Manual for the North Sea International Bottom Trawl Surveys

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posted on 01.01.2020, 00:00 authored by ICESICES
The International Bottom Trawl Survey (IBTS) in the North Sea has been conducted in the 1st quarter of the year since the beginning of the 1960s. The survey was first aimed at juvenile herring in the central and southern North Sea, but then the objectives of the survey were broadened to also provide recruitment indices for gadoids. The survey area was extended towards the northern North Sea and the Skagerrak/Kattegat in the 1980s. From 1991 to 1996, surveys were also conducted in the 2nd, 3rd, and 4th quarters, but since 1997, only the 1st and 3rd quarter surveys remained. The GOV trawl (chalut à Grande Ouverture Verticale) was introduced as the standard gear and the gear rigging and fishing method were standardized. However, some countries continued to use gears other than the GOV in the 3rd quarter IBTS until 1998.

History

Edition/Version

10

Published under the auspices of the following ICES Steering Group or Committee

  • EOSG

Published under the auspices of the following ICES Expert Group or Strategic Initiative

IBTSWG

Series

ICES Survey Protocols

Volume

11

ISSN

2304-6252

Recommended citation

ICES. 2020. Manual for the North Sea International Bottom Trawl Surveys. Series of ICES Survey Protocols SISP 10-IBTS 10, Revision 11. 102 pp. https://doi.org/10.17895/ices.pub.7562