Suppose That Goldfish in the Local Pond Live for 2

question 4

Short Answer

Suppose that goldfish in the local pond live for 2 years. At the end of their first year they reproduce with a TFR of 4; in their second year they just swim around, and then die when the period is over. There are equal numbers of males and females at each goldfish age level. Indicate the total number of fish after 1 and 2 years under the following scenarios:
a) In the beginning there are 2 fish in their first year of life and none in their second year of life.
after 1 yr. _____ after 2 yrs. _____
b) In the beginning there are 10 fish in their second year of life and no fish in their first year of life.
after 1 yr. _____ after 2 yrs. _____

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Definitions:

Habitat

Place where an organism lives and is able to survive and reproduce.

Per Capita Rate

A statistical measure that expresses the quantity of something per individual person within a population or area.

Spawn

The process by which many aquatic animals release or deposit eggs into water.

Die-off

A sharp reduction in the population of a species due to environmental events or human actions.