@eeeefarm:
Ummm, no.
"These results suggest that full siblings or a parent and its offspring rarely mate …
It isn't a morality/religious issue at all. Even the human taboos seem to be based on an instinct to avoid a biologically destructive path.
"For most primate species, males leave their native troop when they reach sexual maturity, which seems to be a mechanism for avoiding excessive inbreeding. ....The human incest taboo is humanly unique as a legal and moral norm, but it expresses a natural emotional disposition that can be found in primate evolutionary history."
Wow, my comment was simply that inbreeding is done, not frequency etc. But okay, lets go with it. First the "umm no" part. Umm yes. What I said was precisely accurate, they don't care, they do it. You then go on to get into frequency, but that wasn't what I said or addressed.
Did not suggest it was done frequently, but most absolutely it is done. And in packs of horses and wild canids (wolves and coyotes– though one interesting theory on red wolves/coyote hybrids is that the wolf/coyote breedings may be so high because of the lack of a lot of unrelated wolves, which supports avoiding it. Otoh, often wolves with plenty of mating opportunities still are known to mate with dogs and coyote so who knows), it is also done depending on isolation and other ssues. Obviously, island wild horses inbreed a heck of a lot more than those with the ability to roam. And incest in humans has not always been taboo, but even when not taboo, it wasn't common. Your article studied a limited number of wolves, yet found some that did. For you to suggest with your "um no" that they rarely or never is not what was stated even in the article you quoted about wolves in GENERAL. In fact, they found that the Minnesota wolves DID have higher inbreeding. And they did NOT say that there was none in any of the groups.
Also, keep in mind that the top male/female generally are usually the main breeding pair in the group. And although it has been proven that the old idea of it being ONLY them isn't true, it predominately is. So by the time an offspring is mature, the sire/dam often getting ready to be bumped out. And those staying with the pack often don't breed at all. That said, often pups from a pack do often leave to form/find another pack. I have often wondered if the dominate personalities of the sire/dam creates offspring that are more likely to move on where they also can rule, but who knows.
Furthermore, you have to look at different types of wolves and locations. Not much set in stone, including that red wolves actually tend to live in family packs.
http://www.fws.gov/redwolf/
And obviously, when there is a small (or isolated) population, they do indeed inbreed a lot.
http://www.sciencedaily.com/releases/2006/12/061221074654.htm
Wild horses/burros … yes some inbreeding: http://www.blm.gov/wo/st/en/info/regulations/Instruction_Memos_and_Bulletins/national_instruction/2009/IM_2009-062.html
Found quite a few others but the point is simply that it occurs in the wild with horses also.
But my only point was that in the wild, animals do inbreed. I didn't say the norm, all the time or often. It varies widely.
http://www.sciencedaily.com/releases/2006/12/061221074654.htm
As for dog breeds, I'll resist a "well duh" on them being highly inbred. That is how breeds are created– limited gene pools creating specific types. Here is something you may want to read up on if you don't already know. It's a joke when we talk much about line breeding with many (probably most) breeds. The inbreeding coefficient for so many breeds is so high and getting worse that it is amazing. Unlike wild animals, unless they are in isolated areas, have pretty healthy diversity. With dog breeds, particularly rare ones or show lines here that suffered horribly from "popular stud" issues, people look at a dog and see the parents and grandparents aren't related, think kewl. You go back 10 generations and nearly every dog is the same and you realize that your gene pool is terribly limited.
http://www.amrottclub.org/health_pedigree_analysis.shtml
"A four-generation pedigree containing 28 unique ancestors for 30 positions in the pedigree could generate a low inbreeding coefficient, while eight generations of the same pedigree, which contained 212 unique ancestors out of 510 possible positions, had a considerably higher inbreeding coefficient. What seemed like an outbred mix of genes in a couple of generations appeared as a linebred concentration of genes from influential ancestors in extended generations."
Popular studs (and preferred colors, to get this back to the article) resulted in the total loss of some colors in the Scottish deerhound. The POPULAR color was grey. Grey is recessive. Breeders massively bred greys in order to win. (Greys are actually genetically brindle but that doesn't matter for the point.) The color preference of course also led to increasing the inbreeding coefficient. Rottweilers, a breed that also suffered greatly from popular studs, also have an incredibly high inbreeding coefficient. Both breeds are in the top highest for bone cancer. Creation of breeds and limited gene pools is a big basis for many genetic diseases that occur almost exclusively in a breed.
It is nice to see clubs pushing for breeders to really look into their breeding program's inbreeding coefficient.
http://www.the-kennel-club.org.uk/services/public/mateselect/genetic-diversity.aspx
Nice article for anyone I haven't already lost: http://www.amrottclub.org/health_genetic_diversity.shtml
http://www.netpets.org/dogs/healthspa/longevity.html Armstrong has written a lot, and while this is on poodles, I think the link between inbreeding coefficient and shortened life span is very interesting.
your quote::: :::It isn't a morality/religious issue at all. Even the human taboos seem to be based on an instinct to avoid a biologically destructive path.:::
To humans.. not being snarky, but when you quote a blogger, it might help to know the person is not an expert and to read the comments pounding the article. While the theory is interesting, there is also theories that avoiding incest had a lot to do with social issues, such as raising offspring which would be less desirable if the offspring were potential replacements. In fact, I actually think but have no proof that we do have a predisposition to not be attracted to familiarity. Studies done on kids raised in kibbutzes found that they rarely married those raised with them, even though not biologically related. Keep in mind also that isolated human groups have much higher "inbreeding coefficients" too. But because those with "bad" genes often died/didn't reproduce, they maintain relatively healthy populations. Studies done on some middle eastern populations found similar findings and that when these more closely related individuals married within a relatively closed environment, few genetic issues arose.