It means that there is a very small gene pool. There are only a few characteristics passed around.
If a population of animals becomes so tiny it has trouble sustaining its numbers, then it becomes endangered.
animals eat fish
If the population growth rate becomes zero the population size becomes static. It stays where it was when it became zero until the rate changes. If the rate becomes negative the population would begin to shrink.
red wolf
Interbred considerably.
Not enough information...
When people migrate the population that they left becomes smaller. When these people migrate to where they are going to that population becomes larger.
No, cats and dogs aren't interbred.
They cannot interbreed.
The population mean is the mean value of the entire population. Contrast this with sample mean, which is the mean value of a sample of the population.
"The advantage is that the mean takes every value into account. A disadvantage is that it can be affected by extreme values. " The mean or more properly the "arithmetic mean" of a sample will eventually approximate the mean of the distribution of the population as the sample size increases. If the population distribution is skewed (not symmetrical), the mode and median will not provide an estimate of the mean, even as the sample size becomes large.
Cats and dogs aren't interbred. So there is no such animal.