# WATERY PRESENTATION

brismoutierloic

Created on March 31, 2022

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## Transcript

_{n}: Biomass in a year n

C : can be defined as C=pX_{n}

The Schaefer model :

_{n}: Environmental variability for year n

I. The population growth

we tried to solve (E) so we calculate Δ with Δ=b²-4ac

for each of those 3 populations growth, there are differents ways to reach these differents populations growth cases

From our previous work: we noticed three population growth and we've tried to transform the sequence in function to find the different formula for each of these population growth, we've calculated for the most interesting population growth, the growing population one (graph.1) what value we needed to get the best yield without killing the whole fish population, it's the best case we've found, because the population will still grow, even with a really high fishing rate.