The following table shows a comparison of two possible life history strategies f
ID: 150274 • Letter: T
Question
The following table shows a comparison of two possible life history strategies for a fish, in terms of how quickly it grows each year and how many eggs it can produce. For a population of fish that lives on average 2 years, would a 'slow/high' or a 'rapid/low strategy result in higher fitness? (fitness contribution to the gene pool of the next generation, or more simply number of offspring produced) What about 4 years? 6 years? Explain why. 3) Characteristic Slow growth/high fecundity Body weight Growth increment Weight of eggs Cumulative weight of eggs 10 12 2.4 9.6 17.6 14.4 2.9 11.5 29.1 173 3.5 13.8 42.9 4.2 16.6 59.5 25.0 5.0 200 79.5 Rapid growth/low fecundity Body weight Growth increment Weight of eggs Cumulative weight of eggs 33.8 16.9 16.9 40.7 50.776.1 38.1 38.1 66.1 1042 10 15 7.5 7.5 12.5 22.5 11.3 11.3 23.8 25.4 25.4 Note: All werights in grams Body wvight+gth increment next year's body wvight Cunudlative weight of eggs to last year + wwight of -cumalatiuve weight of epgs to this war Growth incnement and weight of eggs in ach year are egual to the body weight.Explanation / Answer
For slow growth having fish:
The fish which lives an average of 4 years is producing the egg, that is weighing 13.8 g.
The cumulative weight of eggs is 42.9 g. Then the total offspring that this fish contributes is 42.9÷13.8, which equals to 3.10, this is the value of gene pool that is contributed by this fish to its next generation.
This value for the fish that lives 6 years average life is 3.9
This value for the fish of 2 years average life is 1.88
For rapid growth having fish:
The total genepool that is contributed by the fish of 4 years average life is 2.4
The total gene pool that is contributed by the fish of 6 years average life is 2.73.
This value for the fish of 2 years average life is 1.6 only.
Hence, it can be concluded that slow growth having fish is exhibiting good fitness than the rapid growth having one.
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