cladking
Well-Known Member
If a dog breeder has a litter of pups and selects out one pup to move forward due to the expression of a desirable trait, whether the remaining pups are allowed to breed or not is irrelevant to the description of the process. It is selection. It is not described as or by the term bottleneck. Selection and bottleneck describe different processes in biology. DIFFERENT. I cannot imagine someone trying to force their way into these discussions without a basic understanding of the material that would including knowing what those terms define and describe.
If pups in the litter without the desired trait are never allowed to breed, then their fitness is less than that of the pup that is allowed to breed. Clearly, they are not going to have offspring, so their fitness is zero. Fitness is the quantitative representation of individual reproductive success, so in populations, you see a variation of fitness by phenotype.
Change in living things and in species is variable and not sudden. There is no evidence that it is sudden across the board. That doesn't make any sense at all to claim that. It is a ridiculous claim that change in species is sudden, when the evidence does not support such a wild claim.
Speciation isn't described by the ridiculous scenario of breeding dogs that don't eat meat or like cats. What is that? Good grief. If you breed dogs selecting for a diet without meat, the end result would be a variety of dogs that don't eat meat. They would still be dogs.
Gradualism is supported by the evidence. To say it is not is an example of denial.
You might think I don't understand but in reality I simply don't agree.
Words like "bottleneck" are just symbols we use for communication. Just as you say the puppies that don't reproduce have zero fitness, I am saying that every single canine that isn't represented in a litter of puppies is irrelevant so every litter is essentially the result of a bottleneck. But when all other dogs are intentionally excluded and the puppies do not interbreed with any of these other canines it is effectively an imposed (intentional) bottleneck. If all these other dogs are excluded from a population then they are irrelevant and may as well be extinct.
I think you are over complicating this.
I've shown dozens of instances of sudden changes in life.
I am simply suggesting that if you select or nature selects for very unusual behavior that the resultant is a new species. Remember my "experiment" that produced upside down flies? Landing on a table covered in spilled syrupy goodies is most unusual behavior for a fly but it was the sole means to survival. I believe this is the source of almost all speciation other than mutation and a few other more minor processes.