In a chorus of male frogs of one species, which would be considered by evolutionary biologists to be the fittest?

The biggest frog.
The frog that has the most descendants.
The frog with the largest territory.
The loudest frog.
The frog that attracts the most females.

I am between the loudest and the one that attracts nost females

Most likely the one with the most descendants. Evolutionary science generally deals with the passing on of genes, and that frog would have reproduced the most and would therefore have been the most successful.

Evolutionary biologists would consider the frog that has the most descendants to be the fittest in this scenario. Fitness, in the context of evolution, refers to an organism's ability to successfully reproduce and pass on its genes to future generations. Therefore, the frog with the most offspring would be considered the fittest because it has successfully passed on its genetic traits to the next generation, ensuring the survival of those traits in the population.

To determine which frog has the most descendants in a chorus of male frogs, a study could be conducted using genetic techniques, such as DNA analysis or paternity testing. By collecting genetic samples from the offspring and comparing them to the genetic profiles of the male frogs in the population, researchers can identify which frog has fathered the most offspring.

It's worth noting that being the loudest or attracting the most females may increase the chances of successful reproduction for a male frog, but these factors alone do not guarantee that its genes will be passed on to future generations. The ultimate measure of fitness lies in the number of offspring an individual produces and successfully contributes to the next generation.