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Expeditionsrapport IBTS, januari 2019

Bland, Barbara and Hjelm, Joakim (2019). Expeditionsrapport IBTS, januari 2019. Lysekil: (NL, NJ) > Department of Aquatic Resources, Sveriges lantbruksuniversitet. Aqua reports ; 2019:9
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Abstract

Havsfiskelaboratoriets trålexpeditioner i Västerhavet (Skagerrak och Kattegatt) genomförs två gånger årligen, i kvartal 1 och 3. Den franska bottentrålen GOV används för fisket dagtid. Under kvartal 1 används också en mindre finmaskig trål (MIK) nattetid för provtagning av fisklarver.

Under expeditionen genomfördes totalt 45 godkända tråldrag med GOV-trålen, tre i Nordsjön, 24 i Skagerrak och 18 i Kattegatt. Svenska Försvarsmakten medgav tillstånd för fiske på 24 stationer istället för de ordinarie 27 stationerna i Skagerrak.

Den totala fångsten uppgick till drygt 13,1 ton och inkluderade 70 fiskarter. Den biologiska provtagningen, som inkluderar insamling av otoliter för åldersbestämning, gjordes på de viktigaste kommersiella arterna. Totalt togs 5 555 otoliter från 11 olika arter.

MIK-trålningen resulterade i 60 godkända tråldrag med fångst av bland annat 607 sillarver, 2 skarpsillarver och 12 ållarver.

Authors/Creators:Bland, Barbara and Hjelm, Joakim
Title:Expeditionsrapport IBTS, januari 2019
Alternative abstract:
LanguageAbstract
UNSPECIFIED

The Institute of Marine Research is responsible for the trawl survey in the Skagerrak, a marginal sea to the North Sea and the Kattegat, a transition area to the Baltic Sea. This survey is conducted twice annually, in quarters 1 and 3. The French bottom trawl GOV is used for the fishing daytime while in Q1 only, a MIK trawl is used at night for sampling fish larvae.

In all, 45 valid hauls were towed using the GOV-trawl, three hauls in the North Sea, 24 in the Skagerrak and 18 in the Kattegat. The Swedish Armed Forces disallowed us three of our planned hauls resulting in lower coverage in the Skagerrak.

The total catch amounted to 13,1 tonnes and included 70 species of fish. The biological sampling, which includes collection of otoliths for age analysis, was done on the most important commercial species. In total 5 554 otoliths were collected from 11 different species.

MIK trawling resulted in 60 valid trawl hauls with catches of 607 herring larvae, 2 sprat larvae and 12 eel larvae and several other species.

Series/Journal:Aqua reports (12351367)
Year of publishing :2019
Number:2019:9
Number of Pages:18
Place of Publication:Lysekil
Publisher:Institutionen för akvatiska resurser, Sveriges lantbruksuniversitet
Associated Programs and Other Stakeholders:SLU - Environmental assessment > Programme Coastal and sea areas
ISBN for electronic version:978-91-576-9671-7
Language:Swedish
Publication Type:Report
Article category:Other scientific
Full Text Status:Public
Agris subject categories.:M Aquatic sciences and fisheries > M40 Aquatic ecology
Subjects:(A) Swedish standard research categories 2011 > 4 Agricultural Sciences > 401 Agricultural, Forestry and Fisheries > Fish and Aquacultural Science
(A) Swedish standard research categories 2011 > 1 Natural sciences > 106 Biological Sciences (Medical to be 3 and Agricultural to be 4) > Ecology
Keywords:fisk, beståndsuppskattning, Skagerrak, Kattegatt
URN:NBN:urn:nbn:se:slu:epsilon-p-100462
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-p-100462
ID Code:16204
Faculty:NJ - Fakulteten för naturresurser och jordbruksvetenskap
Department:(NL, NJ) > Department of Aquatic Resources
Deposited By: SLUpub Connector
Deposited On:13 Jun 2019 11:44
Metadata Last Modified:13 Jun 2019 11:44

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