Accordingly heavier cats had greater success in mating and therefore the creation of offspring. This would seem to be a classic example of the survival of the fittest (Darwin's theory of evolution).
|Cats fighting and watching - Photo by J i J y|
However, when heavier males were within a feeding group other than their own they fared less well in arguments over a female. Lighter cats sometimes won. Perhaps this is because the females were less acquainted with the incoming males, were less comfortable with them and had a say in the matter.
Note: (1) Mating behaviors, courtship rank and mating success of male feral cat (Felis catus) Akihiro Yamane, Teruo Doi and Yuiti Ono.
Associated page: Cats Mating.