I remember seeing a science program on TV quite a few years ago on this subject.
The program followed a study on mice (or perhaps rats) living in one of those interconnected tubes and cages for pet rodents. Initially only a few animals were placed within the structure. They were allowed to breed normally and given regular nutrition, and everything was cool in rodent land. As the population grew in the structure, a number of changes started to occur in the rodents behaviour, fighting, infantcide, and homosexual behaviour were a few that I could remember.
As I recall, the program and the rodent experiment was presented a commentary on overpopulation rather than homosexuality but it was suggested that these behaviours go hand in hand.
The program followed a study on mice (or perhaps rats) living in one of those interconnected tubes and cages for pet rodents. Initially only a few animals were placed within the structure. They were allowed to breed normally and given regular nutrition, and everything was cool in rodent land. As the population grew in the structure, a number of changes started to occur in the rodents behaviour, fighting, infantcide, and homosexual behaviour were a few that I could remember.
As I recall, the program and the rodent experiment was presented a commentary on overpopulation rather than homosexuality but it was suggested that these behaviours go hand in hand.