Kindest Regards, BobX, it's been a long time!
The origin of the goldfish is thoroughly documented: a Chinese fisher found a bright-red carp among his catch (Chinese carp are black) and saved it in a pail as a gift to the local lord (who rewarded him handsomely). The lord bred the fish in his carp pools, and segregated out all the colored ones which appeared. After a few generations, the colors started shifting unstably, settling on the golden color now seen. This is a classic example of speciation by "punctuated equilibrium."
Thank you for the brief on goldfish, I have wondered from time to time as a child when last I kept them.
So, if I am to understand correctly, color alone is sufficient to denote a new species? So then, how does this apply to humans? I mean, humans are "just" another animal, right? Therefore, any variation in skin color denotes a different species? What about nose size, shoe size, or intellectual capability?
I mean, if not breeding with the parent stock is the qualifier, then because Koi can still breed with Carp, would that not undermine the idea that goldfish are a separate species from carp? I have always been told at every pet shop I asked and every book on the subject I read as a kid, that goldfish grow to the size of their "bowl." Given enough room, the typical goldfish grows to become Koi. Which are merely colorful carp. Yet still carp. Not a new species. A new variety perhaps, a new sub-species, a new "breed" even, but not a new "species." So far, I have to agree with Bandit about "micro vs macro."
The dog, on the other hand, is a classic example of speciation by "gradual drift". Many breeds of dog are still not separated from the wolf enough that there is any barrier to interbreeding (Siberian huskies interbreed with wolf routinely) while others are (good luck interbreeding a Chihuahua with a wolf). The process has been going on for thousands of years, and will take many thousands more before "dog" and "wolf" are completely separate.
Ah yes, had a lengthy discussion about this as well with a rather learned person on the subject, and finally settled on what she called "ring species" and the great similarity between "species" of seagulls that interbreed and domestic dog "breeds." The delineation is arbitrary and tradition. Because all domestic dogs stem from about four distinct lines of wolf, wolves can still interbreed with chihuahuas through "intermediary" breeds. This according to a study found on Vaj's list. And while some other canine species are capable of interbreeding with domestic dogs; coyotes, foxes, dingos and hyenas were eliminated by genetic study as hereditary ancestors to modern domestic dogs. All lines studied led back to the wolf.
I am sorry, but I have a great deal of conflict regarding speciation with regards to my scholarship. I like the way it was presented by another, "lumpers and splitters." The struggle is in consistent classification. And one must admit, if one is anything close to truthful on the subject, that the classification is arbitrary. There are far too many examples of "sub-species" being held out as evidence of speciation, when in fact there is no example I am familiar with that demonstrably shows true speciation, Vaj's list notwithstanding. Indeed, when a "creationist" asks for an example of demonstrable speciation, of "becoming something new" (I already made the mistake of saying "crossing the boundary"), the evolutionist reply is a red faced remark about red-herrings. "Lizards don't become wombats!" No, and I am not trying to say they do. But, in their own way, evolutionists do say that very thing, until they are called on it and take uncalled for offense. We are to believe fish crawled onto land and became amphibians and lizards and birds when evolutionists say it. But when a creationist asks for proof of this (show me a fish that became an amphibian), it is called a red-herring argument. And creationists are then called "illogical?"
Personally, I take a neutral stance. I do not think a "young earth" position is substantiated. Likewise, I think there is a
lot of dogma coming from science as fact that is not fully substantiated by the evidence either. Just a lot of arbitrary classification and hopeful (faithful?) reliance on scientific doctrine. Demonstration of adaptation and "sub" -speciation, sure! No evidence I have seen as of yet of true speciation, of one creature actually becoming another. Again, as Bandit said, micro yes, macro no.
Indeed, how does this classification apply to humans? Or must humans, in order to maintain political correctness, be held to yet a different standard than that applied to the rest of nature? Does the color of one's skin in scientific truth imply a different species?
What's good for the goose, is good for the gander...
