The Application Of Tank Experiments To The Study Of Reproductive Potential In Teleosts Using Gadus Morhua As A Test Model ...

• Main Authors: P.R.Witthames, Andersen, T.E., Kjesbu, O.S.
• Format: Conference Object
• Language: unknown
• Published: ASC 2000 - R - Theme session 2024
• Subjects: Fisheries and aquaculture; Gadus morhua
• Online Access: https://dx.doi.org/10.17895/ices.pub.25636839.v1; https://ices-library.figshare.com/articles/conference_contribution/The_Application_Of_Tank_Experiments_To_The_Study_Of_Reproductive_Potential_In_Teleosts_Using_Gadus_Morhua_As_A_Test_Model/25636839/1

No abstracts are to be cited without prior reference to the author.Age-based population assessments (VPA) have often failed to show a clear relationship between spawning stock biomass and either recruitment or biomass estimated from annual egg production. Recent work has shown that the inclusion of reproductive potential (a measurement of both the quality and quantity of eggs produced in relation to female size and age) helps to explain some of the variation in the stock and recruitment curve. Tank experiments will make it possible to develop tools to measure reproductive potential either directly from fecundity or indirectly from maternal reserves. This paper describes such experiments involving first year maturing cod (Gadus morhua), in which egg production has been studied in relation to maternal reserves. Ovary biopsy samples were taken from the start until the end of spawning when the fish were killed in order to study the persistence of post-ovulatory and atretic follicles (the latter are oocytes that ...