Oh, and here's some data on fox reproduction. What would you expect X and Y to be before checking the actual data?
-Of the X to X+1 cubs born to an average fox litter, an average of Y to Y+1 survive the first year.
Windy, the point you referred to from Caledonian is not different than my own, so clearly it is you who is misunderstanding something here.
Your scenario is plausible, it's just not group selection. It's K selection. Just because "group" is mentioned in the scenario doesn't make it group selection.
Your definition also makes every adaptation that rescues a group from extinction an example of group selection. What's special about reproductive restraint? Antibiotic resistance is group selection, since otherwise that population would go extinct. Indus...
T gene is one scientific name of the variant - or rather "t haplotype". Geneticists are not as anal about names as taxonomists...
Caledonian is right, it's not a "fillip" to point out that reproductive restraint can evolve by individual selection in the sense of K-selection, not in the sense of altruism. To be fair, several recent articles in favor of group selection also talk about "reproductive restraint" and mean altruism, but that doesn't IMO excuse it. Any adaptation leading to late reproduction and less offspring in, say, elephants, must have looked like "reproductive restraint" at some point (although not necessarily at the level of numbers of gra...
I wish I could have found the link on Trivers I was half-recalling though.
Could it be something like this exchange between Trivers and the authors of "Unto Others". Some of the comments from Trivers are priceless.
"You are in way over your head on this one. It is clear that you are behind on current literature. The "selfish gene" is old hat and out of date. Multi-level evolution is increasingly widely accepted by many geneticists, with such mechanisms as reciprocal altruism being keys."
Perhaps you shouldn't be so hasty at pointing the "over your head" finger at others. Reciprocal altruism is NOT about multilevel selection. It's good old individual selection - helping others on the assumption that the help will later be returned. This explanation assumes a fitness benefit (on average) for each participating individual, invoking group selection here is not necessary.
For example, there is a segregation-distorter on the male sex chromosome of some mice which causes only male children to be born, all carrying the segregation-distorter.
Which locus is this?