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Expeditionsrapport IBTS, januari 2020

Bland, Barbara and Börjesson, Patrik (2020). Expeditionsrapport IBTS, januari 2020. (NL, NJ) > Department of Aquatic Resources, Sveriges lantbruksuniversitet. Aqua reports ; 2020:5
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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 fisket dagtid. Under kvartal 1 används också en mindre finmaskig trål (MIK) nattetid för provtagning av fisklarver.

Under expeditionen genomfördes totalt 39 godkända tråldrag med GOV-trålen, 21 i Skagerrak och 18 i Kattegatt.

Den totala fångsten uppgick till drygt 9,9 ton och inkluderade 66 fiskarter.
Den biologiska provtagningen som också innefattar insamling av otoliter för åldersbestämning, gjordes på de kommersiellt intressanta arterna. Totalt togs 4 363 otoliter från 12 olika arter.

MIK-trålningen resulterade i 41 godkända tråldrag med fångst av bland annat 579 sillarver, 4 skarpsillarver och 5 ållarver.

Authors/Creators:Bland, Barbara and Börjesson, Patrik
Title:Expeditionsrapport IBTS, januari 2020
Alternative abstract:
LanguageAbstract
English

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, 39 valid hauls were towed using the GOV-trawl, 21 in the Skagerrak and 18 in the Kattegat.

The total catch amounted to 9,9 tonnes and included 66 species of fish. Biological sampling was carried out on the most important commercial species including otoliths taken for age analysis. In total 4 363 otoliths were collected from 12 different species.

MIK trawling resulted in 41 valid trawl hauls with catches of 579 herring larvae, 4 sprat larvae and 5 eel larvae and several other species.

Year of publishing :2020
Number:2020:5
Number of Pages:18
Publisher:Institutionen för akvatiska resurser, Sveriges lantbruksuniversitet
Associated Programs and Other Stakeholders:SLU - Environmental assessment > Programme Coastal and sea areas
ISBN for electronic version:978-91-576-9743-1
Language:Swedish
Publication Type:Report
Article category:Other scientific
Version:Published version
Full Text Status:Public
Subjects:(A) Swedish standard research categories 2011 > 1 Natural sciences > 106 Biological Sciences (Medical to be 3 and Agricultural to be 4) > Ecology
(A) Swedish standard research categories 2011 > 4 Agricultural Sciences > 401 Agricultural, Forestry and Fisheries > Fish and Aquacultural Science
Keywords:fisk, beståndsuppskattning, Skagerrak, Kattegatt
URN:NBN:urn:nbn:se:slu:epsilon-p-105328
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-p-105328
ID Code:16940
Faculty:NJ - Fakulteten för naturresurser och jordbruksvetenskap
Department:(NL, NJ) > Department of Aquatic Resources
Deposited By: SLUpub Connector
Deposited On:28 Apr 2020 13:29
Metadata Last Modified:02 Sep 2020 18:00

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