Surplus Production Models

Surplus-production models (production models) were the first fishery models to consider all four forces of population dynamics (eqn [1]) together with density dependence. In contrast to yield-per-recruit or early catch-age models, the population is modeled as persisting across years and generations by means of recruitment. Production models are not detailed: the population is considered an undifferentiated biomass, without age structure, and dynamic forces are combined into few parameters.

Worm Farming

Worm Farming

Do You Want To Learn More About Green Living That Can Save You Money? Discover How To Create A Worm Farm From Scratch! Recycling has caught on with a more people as the years go by. Well, now theres another way to recycle that may seem unconventional at first, but it can save you money down the road.

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