Publikationsdatum:
2021-06-27
Beschreibung:
70 half-hour tows using a Grand Ouverture Verticale (GOV) and – for the first time for R.V. “Walther Herwig III” – 102 plankton stations with a special plankton net were this years’ German contribution to the International Bottom Trawl Survey (IBTS). Results show only for sprat, whiting, and Norway pout relatively good incoming year-classes whereas indices for cod, haddock, mackerel, and herring point at rather poor recruitment. Strongest herring larvae concentrations (〈 50 larvae/haul) were observed in the MorayFirth area, on the Fladenground and off the Jutland coast. 75 hydrographic stations showed the water masses in the area of investigation to be vertically mixed and homogenous. However, temperatures measured were 0.5 K to 1 K above longterm means.
Beschreibung:
Johann Heinrich von Thünen-Institute, Federal Research Institute for Rural Areas, Forestry and Fisheries began publishing the Informationen aus der Fischereiforschung = Information on Fishery research in 2010.
Schlagwort(e):
Management
;
Fisheries
;
stock development
;
international survey
;
North Sea
;
stock assessment
;
fisheries management
;
scientific advice
;
sustainable fisheries
;
sprat
;
whiting
;
Norway pout
Repository-Name:
AquaDocs
Materialart:
article
,
FALSE
Format:
application/pdf
Format:
application/pdf
Format:
3-9
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