Posted on 10/01/2008 7:22:16 PM PDT by Soliton
Some cichlid fish see red better while others only have eyes for blue. This difference in vision, observed in fish in an African lake, could be pushing red-bodied cichlids to branch off from their blue-bodied brethren and to form a new species.
If so, it would be the first time that scientists have caught evolution in the act of creating a new species because of changes in sense organs. For one species to diverge into two, some barrier must prevent two groups of individuals from interbreeding. Physical separation of two groups and changes to reproductive organs are two of the wedges that scientists have shown can drive the formation of new species, and evolutionary biologists are always keen to discover new mechanisms.
(Excerpt) Read more at sciencenews.org ...
Must be “global warming”.
Quick throw money at the problem.
(Actually it’s fascinating)
The solution to this is to turn off the lights... All cichlids are the same in the dark...
Wow, neat!
When a fish decides to ‘evolve’ into a palm tree, let me know.
It is not a species unless it can’t reproduce with the other breed.
I realize the Darwinist origin-believers take liberties, but good grief.
I can see this happening as Lake Victoria's become very muddied by surrounding slash-and-burn agriculture (get those folks some GMO crops that can handle the poor soil!) and the choking omnipresence of water hyacynth. Plus the Nile Perch population has really done a number on certain varieties. Their mating habits are dictated by visual cues, color and the "egg spots" on the males' anal fin.
I’ve been watching my aquarium for years, and I’ve yet to see my fish get it on.
fish in the beginning, fish last year, fish this year, and fish tomorrow...
God’s incredible design in action.....
Does this explain liberals?
This simply isn't true. Whales and dolphins can interbreed and they are separate species. They normally do not due to a darwinian concept called "sexual selection". They do in captivity though and they are called "wolphins". They are not hybrids as they can reproduce. This article shows one form of sexual selection driven by changes in the capabilities of the fish's eyes.
The decision was made at the Intergalactic Supernatural Intelligent Design Conference held on Europa this year. (I was a delegate, Europa has the best ganglphlump sashimi in this region of the galaxy!). We are holding off the announcemet until after the upcoming election (ISID policy). BTW, we've already hybridized shrimp with palm trees. Where do you think coconut shrimp come from?
Silliness. If we lock a bunch of people up in a dark cave and their eyes begin to adapt to the dark so that they see better in the dark does that mean they're a new species? It's like saying that blacks and whites are different species because of pigment adaptation in skin.
No it is like saying black prople can't see white people and white people can't see blck people so there is no interbreeding between the two. Once two populations stop interbreeding, the first step of the speciation process has begun. Imagine that all of the dogs in the world except Great Danes and teacup chihuahuas remained. It would be chemically possible for them to interbreed, but virtually impossible for them to mechanically interbreed. Their differences in size speed and strength would place different evolutionary selection pressures on the two populations. The little dogs might evolve to be smaller to adopt a stealth lifestyle. They may become nocturnal. The big dogs may become under pressure to become bigger to access larger prey. Who knows? The separation of the two through sexual selection is the first fork in the road with many forks ahead.
but the black humans remain humans, the white remain white humans, and the dogs remain dogs...
LIKE IN THE BEGINNING....LIKE TOMORROW....
Your argument is filled with a lot of supposition and fortunate circumstances none of which can really be debated. I say that the fish will eventually breed and can never become different species.
lol - nicely done.
The dog example is actually related to ring species. They exist in nature
According to faith and religion yes<.p>
According to scienc, no Here we present a draft genome sequence of the common chimpanzee (Pan troglodytes). Through comparison with the human genome, we have generated a largely complete catalogue of the genetic differences that have accumulated since the human and chimpanzee species diverged from our common ancestor, constituting approximately thirty-five million single-nucleotide changes, five million insertion/deletion events, and various chromosomal rearrangements. We use this catalogue to explore the magnitude and regional variation of mutational forces shaping these two genomes, and the strength of positive and negative selection acting on their genes. In particular, we find that the patterns of evolution in human and chimpanzee protein-coding genes are highly correlated and dominated by the fixation of neutral and slightly deleterious alleles. We also use the chimpanzee genome as an outgroup to investigate human population genetics and identify signatures of selective sweeps in recent human evolution.
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