Angelique
Posted : 2/2/2007 12:13:27 PM
ORIGINAL: Scout in Canada
Some people bring the "dogs have evolved since living with humans" card but they forget that evolution takes millions of years to have an specie change something about it
Actually, no. The time it takes for a species to evolve can be quite short, it depends on many factors such as how often the species breeds, what trait is evolving, where that trait is on the chromosome, what it's attached to, etc etc etc..... a population of fruit flies evolves very quickly because they breed and mature so quickly, which is why they are used in biology labs so often.
What, no fruit fly link? [

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You guys are both technically right. There is the total long term evolution of a living being from where it originally began - often called "macro-evolution", adaptive evolution - often called "micro-evolution", which helps a species in the short term to cope with external changes such as food sources and the environment, and then there is the fuzzy area of when and where man started the actual hands-on manipulation of the dog.
Another interesting area to keep in mind is how dogs might adapt back to nature, if man was completely removed from the picture. I think many specific breeds would co-mingle, some would die out, and some may even breed with wild canids.
ORIGINAL: Scout in Canada
You have to keep in mind, the evolution of the domesticated dog was not natural. Humans have picked the dogs with certain traits and bred them, removing the reproductive abilities of those possessing the undesired traits. Artificial selection of this type can be much faster than in nature.
You're right. Although, noone is sure of the exact chain of events which brought man and dog together and the specific point at which we started manipulating them.
I believe the animal you trying to domesticate and/or breed for a specific purpose has within it a varying degree of "plyability", for successful manipulation. Canines show a greater variance and adaptability from felines, and canines are more social than felines...so that may have a hand in it too.
The entire canine group is fascinating and special, IMO. The fox breeding experiments contain a lot of the typical arguements all around, but it's fascinating and shows how quickly one species can be domesticated, adapted, and changed over a relitively "short" period of time.
Here's a link if anyone is interested:
[link
http://www.freerepublic.com/focus/news/807641/posts]http://www.freerepublic.com/focus/news/807641/posts[/link]