Quote:
Originally posted by Mr. Sandman
Sorry, don't buy it. Removing larger fish does not stunt their growth. The genes don't change because you took a big fish. The fish are smaller because there is not enough fatty foods for them to eat. They are eating small lobsters (which is hurting that fishery) and craps and low cal fish. They need high fat content fish...bunker, giant sand eels, and lots of herring and macs to grow big.
|
Wrong.
The genes do not
change.
Just as there are tall people and short people.
If you remove the tall people from the breeding pool eventually the genes for short people will become more prevelent.
This is how natural selection works. There is a bunch of variation in a population. A disease or some other population limiting factor takes effect.
The portion of the population that has genes that give it an edge (being short) will help that portion of a population to survive.
That simple.
People did not eveolve FROM apes.
Apes and people evolved from a common ancestor.
over the years we each
adapted the strongest/best suited to the conditions survived.
The population that was less able to survive died off further differentiating the species.
This is simple basic biology 101. And it is a proven fact that YOU can prove by talking to anyone that raises any kind of plant/animal.
remove the ones with traits you don't want and keep the ones with traits you do want. eventually most will have the traits you want.
In the case of Large Fish, by removing too many of th ones with the traits we want (largeness) we end up with more that have a trait we don't want (shorts)
plain and simple.
Truth is truth.
Now, wether there are other limiting factors is not up for debate.
Yes, the food supply will also effect them. - Again, biology 101.
not enough food, they are dying earlier, the earlier maturers of the species will survive and propogate. Thus increasing ther respective populations.
Heck, even skin color can be changed over a relatively short period - take that KKK you frigin racist bastards -
Move a population of Dark skinned individuals out of the bright plains and give them a milky diet. Their skin WILL Lighten.
This is because VitaminD poisoning will effect the darkest of them thus limiting the prevelence of those genes.
Move a population of light skinned individuals out of the forests and into barbados and over time their complexion will darken - no not suntanning - They will need more vitaminD. their skin will darken. the individuals without enough D will get sick and thus limit the continuance of those genes.
Again, all basic biology101.
A further example - dog breeds.
most of the common dog breeds we are all so familiar with are only a few thousand years old. AND THEY ARE ALL MAN BRED!!! coming from a population that was domesticated in china about 15000 years ago.
If you mix and match all the different dog populations and select for the common traits eventually you wil lget a dog that is much closer to that first subspecies (and is very wolf like).