Modelling Of Age-Dependent Instantaneous Coefficients Of Natural Mortality For Northeast Arctic Cod ...

No abstracts are to be cited without prior reference to the author.Natural mortality coefficients used to assess the commercial cod stock are presently taken to be identical (M=0.20) for almost all age groups of this stock. The paper describes a model suggesting that instantaneous coefficients of na...

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Main Author: Tretyak, V. L.
Format: Conference Object
Language:unknown
Published: ASC 2000 - V - Theme session 2024
Subjects:
Online Access:https://dx.doi.org/10.17895/ices.pub.25636968.v1
https://ices-library.figshare.com/articles/conference_contribution/Modelling_Of_Age-Dependent_Instantaneous_Coefficients_Of_Natural_Mortality_For_Northeast_Arctic_Cod/25636968/1
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spelling ftdatacite:10.17895/ices.pub.25636968.v1 2024-06-09T07:42:45+00:00 Modelling Of Age-Dependent Instantaneous Coefficients Of Natural Mortality For Northeast Arctic Cod ... Tretyak, V. L. 2024 https://dx.doi.org/10.17895/ices.pub.25636968.v1 https://ices-library.figshare.com/articles/conference_contribution/Modelling_Of_Age-Dependent_Instantaneous_Coefficients_Of_Natural_Mortality_For_Northeast_Arctic_Cod/25636968/1 unknown ASC 2000 - V - Theme session https://ices-library.figshare.com/ICES-ASC-2000/groups https://dx.doi.org/10.17895/ices.pub.25636968 https://ices-library.figshare.com/ICES-ASC-2000/groups ICES Custom Licence https://www.ices.dk/Pages/library_policies.aspx Fisheries and aquaculture Other CreativeWork Conference contribution article 2024 ftdatacite https://doi.org/10.17895/ices.pub.25636968.v110.17895/ices.pub.25636968 2024-05-13T14:08:28Z No abstracts are to be cited without prior reference to the author.Natural mortality coefficients used to assess the commercial cod stock are presently taken to be identical (M=0.20) for almost all age groups of this stock. The paper describes a model suggesting that instantaneous coefficients of natural mortality change with age increasing from 3 years and further. The model explicitly reflects a conceptual relationship between natural mortality of cod, maturity age and theoretical maximum possible lifetime, and implicitly between natural mortality, linear and weight growth. Theoretical premises of the model are formulated and a method of estimating its parameters is suggested. Natural mortality coefficients are calculated for cod from 1946-1991 yearclasses at the age of 3 years and older. To calculate terminal values of coefficients mean weight of one fish at a particular age and the mean of average yearly water temperature in the main branch of the Murman Current in the O-200 m layer in the first three ... Conference Object Arctic cod Arctic Northeast Arctic cod DataCite Metadata Store (German National Library of Science and Technology) Arctic
institution Open Polar
collection DataCite Metadata Store (German National Library of Science and Technology)
op_collection_id ftdatacite
language unknown
topic Fisheries and aquaculture
spellingShingle Fisheries and aquaculture
Tretyak, V. L.
Modelling Of Age-Dependent Instantaneous Coefficients Of Natural Mortality For Northeast Arctic Cod ...
topic_facet Fisheries and aquaculture
description No abstracts are to be cited without prior reference to the author.Natural mortality coefficients used to assess the commercial cod stock are presently taken to be identical (M=0.20) for almost all age groups of this stock. The paper describes a model suggesting that instantaneous coefficients of natural mortality change with age increasing from 3 years and further. The model explicitly reflects a conceptual relationship between natural mortality of cod, maturity age and theoretical maximum possible lifetime, and implicitly between natural mortality, linear and weight growth. Theoretical premises of the model are formulated and a method of estimating its parameters is suggested. Natural mortality coefficients are calculated for cod from 1946-1991 yearclasses at the age of 3 years and older. To calculate terminal values of coefficients mean weight of one fish at a particular age and the mean of average yearly water temperature in the main branch of the Murman Current in the O-200 m layer in the first three ...
format Conference Object
author Tretyak, V. L.
author_facet Tretyak, V. L.
author_sort Tretyak, V. L.
title Modelling Of Age-Dependent Instantaneous Coefficients Of Natural Mortality For Northeast Arctic Cod ...
title_short Modelling Of Age-Dependent Instantaneous Coefficients Of Natural Mortality For Northeast Arctic Cod ...
title_full Modelling Of Age-Dependent Instantaneous Coefficients Of Natural Mortality For Northeast Arctic Cod ...
title_fullStr Modelling Of Age-Dependent Instantaneous Coefficients Of Natural Mortality For Northeast Arctic Cod ...
title_full_unstemmed Modelling Of Age-Dependent Instantaneous Coefficients Of Natural Mortality For Northeast Arctic Cod ...
title_sort modelling of age-dependent instantaneous coefficients of natural mortality for northeast arctic cod ...
publisher ASC 2000 - V - Theme session
publishDate 2024
url https://dx.doi.org/10.17895/ices.pub.25636968.v1
https://ices-library.figshare.com/articles/conference_contribution/Modelling_Of_Age-Dependent_Instantaneous_Coefficients_Of_Natural_Mortality_For_Northeast_Arctic_Cod/25636968/1
geographic Arctic
geographic_facet Arctic
genre Arctic cod
Arctic
Northeast Arctic cod
genre_facet Arctic cod
Arctic
Northeast Arctic cod
op_relation https://ices-library.figshare.com/ICES-ASC-2000/groups
https://dx.doi.org/10.17895/ices.pub.25636968
https://ices-library.figshare.com/ICES-ASC-2000/groups
op_rights ICES Custom Licence
https://www.ices.dk/Pages/library_policies.aspx
op_doi https://doi.org/10.17895/ices.pub.25636968.v110.17895/ices.pub.25636968
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