Variation of peak spawning of arcto-Norwegian cod (Gadus morhua L.) during the time period 1929-1982 based on indices estimated from fishery statistics. In: The propagation of cod Gadus morhua L.: an international symposium, Arendal, 14 - 17 June 1983

The weekly amounts of roe and cod landed in the main spawning area at Vestfjorden are known since 1929. An index of the median of the spawning intensity curve was constructed on the basis of an analogy to the gonosomatic index using the weight ratio roe/cod. The index of median reveals a delay of ab...

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Bibliographic Details
Main Author: Pedersen, Torstein
Format: Conference Object
Language:English
Published: Havforskningsinstituttet 1984
Subjects:
Gadus morhua
Vestfjorden
Online Access:http://hdl.handle.net/11250/115094
id ftimr:oai:imr.brage.unit.no:11250/115094
record_format openpolar
spelling ftimr:oai:imr.brage.unit.no:11250/115094 2024-09-15T18:07:15+00:00 Variation of peak spawning of arcto-Norwegian cod (Gadus morhua L.) during the time period 1929-1982 based on indices estimated from fishery statistics. In: The propagation of cod Gadus morhua L.: an international symposium, Arendal, 14 - 17 June 1983 Pedersen, Torstein 1984 375089 bytes application/pdf http://hdl.handle.net/11250/115094 eng eng Havforskningsinstituttet Flødevigen rapportserie 1, 1984 urn:issn:0333-2594 http://hdl.handle.net/11250/115094 301-316 Conference object 1984 ftimr 2024-07-31T03:37:25Z The weekly amounts of roe and cod landed in the main spawning area at Vestfjorden are known since 1929. An index of the median of the spawning intensity curve was constructed on the basis of an analogy to the gonosomatic index using the weight ratio roe/cod. The index of median reveals a delay of about one week during the time period from 1929 to 1982. This method is compared to the median of spawning curves based on net hauls of newly spawned eggs from the traditional spawning grounds for the time period 1976 to 1982. Sources of errors in the fishery statistics are discussed. Conference Object Gadus morhua Vestfjorden Institute for Marine Research: Brage IMR
institution Open Polar
collection Institute for Marine Research: Brage IMR
op_collection_id ftimr
language English
description The weekly amounts of roe and cod landed in the main spawning area at Vestfjorden are known since 1929. An index of the median of the spawning intensity curve was constructed on the basis of an analogy to the gonosomatic index using the weight ratio roe/cod. The index of median reveals a delay of about one week during the time period from 1929 to 1982. This method is compared to the median of spawning curves based on net hauls of newly spawned eggs from the traditional spawning grounds for the time period 1976 to 1982. Sources of errors in the fishery statistics are discussed.
format Conference Object
author Pedersen, Torstein
spellingShingle Pedersen, Torstein
Variation of peak spawning of arcto-Norwegian cod (Gadus morhua L.) during the time period 1929-1982 based on indices estimated from fishery statistics. In: The propagation of cod Gadus morhua L.: an international symposium, Arendal, 14 - 17 June 1983
author_facet Pedersen, Torstein
author_sort Pedersen, Torstein
title Variation of peak spawning of arcto-Norwegian cod (Gadus morhua L.) during the time period 1929-1982 based on indices estimated from fishery statistics. In: The propagation of cod Gadus morhua L.: an international symposium, Arendal, 14 - 17 June 1983
title_short Variation of peak spawning of arcto-Norwegian cod (Gadus morhua L.) during the time period 1929-1982 based on indices estimated from fishery statistics. In: The propagation of cod Gadus morhua L.: an international symposium, Arendal, 14 - 17 June 1983
title_full Variation of peak spawning of arcto-Norwegian cod (Gadus morhua L.) during the time period 1929-1982 based on indices estimated from fishery statistics. In: The propagation of cod Gadus morhua L.: an international symposium, Arendal, 14 - 17 June 1983
title_fullStr Variation of peak spawning of arcto-Norwegian cod (Gadus morhua L.) during the time period 1929-1982 based on indices estimated from fishery statistics. In: The propagation of cod Gadus morhua L.: an international symposium, Arendal, 14 - 17 June 1983
title_full_unstemmed Variation of peak spawning of arcto-Norwegian cod (Gadus morhua L.) during the time period 1929-1982 based on indices estimated from fishery statistics. In: The propagation of cod Gadus morhua L.: an international symposium, Arendal, 14 - 17 June 1983
title_sort variation of peak spawning of arcto-norwegian cod (gadus morhua l.) during the time period 1929-1982 based on indices estimated from fishery statistics. in: the propagation of cod gadus morhua l.: an international symposium, arendal, 14 - 17 june 1983
publisher Havforskningsinstituttet
publishDate 1984
url http://hdl.handle.net/11250/115094
genre Gadus morhua
Vestfjorden
genre_facet Gadus morhua
Vestfjorden
op_source 301-316
op_relation Flødevigen rapportserie
1, 1984
urn:issn:0333-2594
http://hdl.handle.net/11250/115094
_version_ 1810444619811389440

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