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Expeditionsrapport IBTS, januari 2016

Hjelm, Joakim and Bland, Barbara (2016). Expeditionsrapport IBTS, januari 2016. Lysekil: (NL, NJ) > Department of Aquatic Resources, Sveriges lantbruksuniversitet. Aqua reports ; 2016:5
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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 provtagningen av demersala arter. Under kvartal 1 används också en MIK-trål nattetid för provtagning av fisklarver. Under denna expedition gjordes totalt 46 giltiga tråldrag i hela området med GOV-trålen, 27 i Skagerrak och 19 i Kattegatt. Även i år var det tre stationer som inte kunde fiskas p.g.a. Svenska Försvarsmaktens tillträdesförbud varvid den värdefulla tidsserien är bruten för dessa stationer. Den totala fångsten uppgick till 18 ton och inkluderade 57 fiskarter. Den biologiska provtagningen, som innebär bland annat insamling av otoliter för åldersanalys, gjordes på de viktigaste kommersiella arterna. Totalt togs 4 943 otoliter från 11 olika arter. MIK-trålningen resulterade i 62 godkända tråldrag med fångst av bland annat 61 sillarver, 4 skarpsillarver och 6 ållarver.

Authors/Creators:Hjelm, Joakim and Bland, Barbara
Title:Expeditionsrapport IBTS, januari 2016
Alternative abstract:
LanguageAbstract
English

The Institute of Marine Research is responsible for the trawl survey in the Skagerrak and the Kattegat areas of the North Sea. This survey is conducted twice annually, in quarters 1 and 3. The French bottom trawl GOV is used for sampling demersal species while in Q1 only, a MIK trawl is used at night for sampling fish larvae.During this survey a total of 46 valid hauls were towed in the whole area using the GOV-trawl, 27 in the Skagerrak and 19 in the Kattegat. Also this year, three stations had to be cancelled due to the Swedish Armed Forces' disallowance thereby putting an end to a long and valuable time series. The total catch amounted to 18 tonnes and included 57 species of fish. The biological sampling, which includes collection of otoliths for age analysis, was done on the most important commercial species. In total 4943 otoliths were collected from 11 different species. MIK trawling resulted in 62 valid trawl hauls with catches of 61 herring larvae, 4 sprat larvae and 6 eel larvae and several other species.

Series/Journal:Aqua reports (12351367)
Year of publishing :2016
Depositing date:28 March 2017
Number:2016:5
Number of Pages:19
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:978-91-576-9391-4
Language:Swedish
Publication Type:Report
Article category:Other scientific
Full Text Status:Public
Agris subject categories.:M Aquatic sciences and fisheries > M11 Fisheries production
M Aquatic sciences and fisheries > M40 Aquatic ecology
Subjects:(A) Swedish standard research categories 2011 > 1 Natural sciences > 106 Biological Sciences (Medical to be 3 and Agricultural to be 4) > Ecology
Agrovoc terms:data collection, baltic sea, fishes
Keywords:trålundersökning, fisk, Skagerrak, Kattegatt, beståndsuppskattning
URN:NBN:urn:nbn:se:slu:epsilon-e-4045
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-e-4045
ID Code:14186
Faculty:NJ - Fakulteten för naturresurser och jordbruksvetenskap
Department:(NL, NJ) > Department of Aquatic Resources
External funders:European Commission and Swedish Agency for Marine and Water Management
Deposited By: SLUpub Connector
Deposited On:28 Mar 2017 13:56
Metadata Last Modified:26 Apr 2017 12:53

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