A small lake is capable of supporting both bluegill and small-mouth bass. These

Question

A small lake is capable of supporting both bluegill and small-mouth bass. These two bony fish species compete for similar food resources. The carrying capacity of this lake for bluegill (K1) is 1,500 and for bass (K2) is 500. After some careful measurement, we find that is 0.5 and the is 0.25. We stock the lake with 250 bluegill and 750 bass.

Look at the three figures.

1. Will both species be able to coexist over time? If not, which one will be driven to extinction?

2. Approximately how many individuals of each species of fish will there be, once this system reaches equilibrium?

ZNGls for Sp.1 and Sp.2 Trajectory of population sizes -Species 1 Species 2 500 1000 1500 2000 2500 0 500 1000 1500 2000 2500 Species 1 Species 1 Population size vs time -Species 1 Species 2 20 30 50 Index

Explanation / Answer

Ans-1 according to the data shown in the graphs the both species will not be able to coexist over time because population of species 1 is increasing with time but population of species 2 is decreasing so the species 2 will be driven to extinction.

Ans-2 when both the species will reach at equilibrium then there will be approximately 500 fish of each species

Because 250+750/2 = 500.

So approximately 500 fish of each species may be present.

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