FF1304.pdf (147.7Kb)

Mean length, mean weight, biomass (thousands of tonnes) and numbers (millions) breakdown by age and maturity per stratum obtained during the July 2004 North Sea hydro acoustic

As mentioned earlier, when the basic model is being used for a pact period, the catches are transformed into numbers of fish by age-group and month. When the model is being

(ii) If the parameters of the length-given-age model and the proportion-at-age model are known, it is simple to simulate the ages of the fish with only length data

The individual growth in length (cm/year) for each age group can be calculated from values obtained by comparing the mean length at age of immature capelin one year with the mean

Herring mean length, mean weight, numbers (millions) and biomass (thousands of tonnes) by age and maturity stages in the herring stocks in the Norwegian survey

a) review and update catch at age and mean weight at age data including information on proportions of North Sea autumn spawners and Western Baltic spring

Weights at age for 1997 were obtained by applying average Danish and Swedish mean weight per length group data to the length frequencies of each year class.. The mean weights at

population is feeding both to calculate the mean weight of the stomach contents and to calculate consumption using the corrstant-evacuation model (Bromley, 1988) - there appears