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Therefore, knowing the number of fishing days allocated, it is possible to estimate the fishing mortality in a given year by multiplying the number of days allocated by each

The present overwintering grounds of North Sea herring are not exactly known, but they are assumed to be mainly in the western part of the North Sea (Fige7)

It is intended to hold all pri- mary acoustic and trawl data from the North Sea Herring Acoustic Survey (including West of Scotland and Kattegat/Skagerrak) and to provide primary

Estimates of fishing mortality coefficients for 1967-75 calculated by Virtual Population Analysis, and values assumed for 1976.. West of Scotland Saithe.. North-East Arctic

The equilibrium biomass at a given fishing mortality for a prey species will depend on the exploitation and hence the abundance assumed for the other species, both predators and

The calculated total stock size in weight of four year old and older herring from cohort analysis for two alternatives of natural mortality compared to the

Relation between abundance estimates of I-grouE herring from Young Herring Surve~ and f.E.9.m Virtual POEulation Analysis The major objective of the Young Herring

In the North Sea all stocks of roundfish and flatfish species have been exposed to high levels of fishing mortality for a long period. For most of !hese stocks