Expeditionsrapport IBTS, augusti 2020

Börjesson, Patrik and Bland, Barbara (2020). Expeditionsrapport IBTS, augusti 2020. (NL, NJ) > Department of Aquatic Resources, Sveriges lantbruksuniversitet. Aqua reports ; 2020:13
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Abstract

Havsfiskelaboratoriets trålexpeditioner i Västerhavet (Skagerrak och Kattegatt) genomförs två gånger årligen, i kvartal 1 och 3. Fisket utförs med den franska bottentrålen GOV.

Under denna expedition gjordes totalt 46 giltiga tråldrag i hela området, 24 i Skagerrak och 19 i Kattegatt samt två i Nordsjön. Fångsten utgjordes av 60 fiskarter varav 9,5 ton var sill, 10,4 ton skarpsill, 1,1 ton kolja och 528 kg torsk.

I Kattegatt visar sillens 0-grupp och skarpsillens 1-grupp en markant ökning. Koljans 0-grupp i Skagerrak är den största sedan 2009. Torsken domineras av 1- gruppen i enlighet med förra årets starka 0-grupp. 0-gruppen i år är måttlig medan övriga åldersklasser hos torsken är fortsatt extremt låga.

Biologiska parametrar på individnivå samlas in på sill- och torskfiskar samt några plattfiskar. Totalt provtogs 3 999 individer från 13 olika arter med avseende på ålder och könsmognad.

Authors/Creators:

Börjesson, Patrik and Bland, Barbara

Title:

Expeditionsrapport IBTS, augusti 2020

Alternative abstract:

Language

Abstract

English

The Institute of Marine Research is responsible for the trawl survey in the Skagerrak and the Kattegat areas of the North Sea. During this survey a total of 46 valid hauls were towed, 24 hauls in the Skagerrak and 19 in the Kattegat and two in the North Sea. In all 60 different fish species were caught where of 9.5 tonnes were herring, 10.4 tonnes were sprat, 1,1 ton were haddock and 528 kg were cod. In the Kattegatt, the herring 0-group and the 1-group of sprat have increased considerably. The haddock 0 –group in Skagerrak is the largest since 2009. The cod catch is dominated by the the 1-group, in accordance with last year’s large 0-group. The 2+-group of cod show very low numbers. Biological data are collected on clupeids and gadoids as well as some flatfish. In total 3 999 fish from 13 species were sampled for age and maturity determination.

Year of publishing :

2020

Number:

2020:13

Number of Pages:

Publisher:

Institutionen för akvatiska resurser, Sveriges lantbruksuniversitet

Associated Programs and Other Stakeholders:

SLU - Environmental assessment > Programme Coastal and sea areas

ISBN for electronic version:

978-91-576-9798-1

Language:

Swedish

Publication Type:

Report

Article category:

Other scientific

Version:

Published version

Full Text Status:

Public

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

URN:NBN:

urn:nbn:se:slu:epsilon-p-108767

Permanent URL:

http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-p-108767

ID Code:

18720

Faculty:

NJ - Fakulteten för naturresurser och jordbruksvetenskap

Department:

(NL, NJ) > Department of Aquatic Resources

Deposited By:

SLUpub Connector

Deposited On:

24 Nov 2020 12:23

Metadata Last Modified:

19 Jan 2021 11:52

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