Virtual population analysis

Sathianandan, T V (2015) Virtual population analysis. In: Training Manual Fish Stock Assessment and Management. ICAR- Central Marine Fisheries Research Institute, Kochi, pp. 101-106. ISBN 978-93-82263-07-4

[img] Text
Training Manual Fish Stock Assessment and Management_2015_Sathianandan T.V..pdf

Download (203kB)
Official URL: https://eprints.cmfri.org.in/18442/
Related URLs:

    Abstract

    Cohort analysis is a general terminology for analytical techniques used in the estimation of mortality and population size using catch-at-age data. Different methods are available under the class of cohort analysis namely Virtual Population Analysis by Fry, Gulland and Cohort Analysis by Pope and also multispecies VPA. In these models we trace the decline in abundance of cohorts as they age and pass through the fishery. The decline in cohort abundance is thus used to determine mortality rates. Originally the method was developed to trace the population size over the life space of a cohort and later devised to estimate fishing mortality rates, current abundance and recruitment size. The cohort analysis concept was first developed by Derzhavin (1922) with his work on sturgeon. In 1949, Fry termed Derzavin’s model as Virtual Population Model and applied it to trace historical population size. In 1965, Gulland attempted calculations for estimating historical population sizes starting with the oldest age group and worked backwards with a guess of fishing mortality rate F termed as terminal F.

    Item Type: Book Section
    Uncontrolled Keywords: Population dynamics
    Subjects: Marine Fisheries > Fisheries Statistics
    Marine Fisheries > Population Dynamics
    Divisions: CMFRI-Kochi > Marine Capture > Fishery Resources Assessment, Economics and Extension Division
    Subject Area > CMFRI > CMFRI-Kochi > Marine Capture > Fishery Resources Assessment, Economics and Extension Division
    CMFRI-Kochi > Marine Capture > Fishery Resources Assessment, Economics and Extension Division
    Subject Area > CMFRI-Kochi > Marine Capture > Fishery Resources Assessment, Economics and Extension Division
    Depositing User: Arun Surendran
    Date Deposited: 05 Aug 2024 09:31
    Last Modified: 05 Aug 2024 09:31
    URI: http://eprints.cmfri.org.in/id/eprint/18682

    Actions (login required)

    View Item View Item