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Scientists Breed Big-Brained Guppies To Demonstrate Evolution's Trade-Offs

An anonymous reader writes "Scientists have long suspected that big brains come with an evolutionary price — but now they've published the first experimental evidence to support that suspicion, based on their efforts to breed big-brained fish. A Swedish team found it relatively easy to select and interbreed common guppies to produce bigger (or smaller) brains — as much as 9.3 percent bigger, to be precise (abstract). But the bigger-brained fish also tended to have smaller guts and produce fewer babies."

8 of 121 comments (clear)

  1. I for one... by Anonymous Coward · · Score: 5, Funny

    ...oh nevermind.

    1. Re:I for one... by Guppy · · Score: 3, Funny

      ... welcome our guppy overlords?

      Hello.

  2. Uh by Anonymous Coward · · Score: 4, Funny

    "But the bigger-brained fish also tended to have smaller guts and produce fewer babies"

    Of course. Smart fish stay kids free to live fun and awesome lives in the wet.

  3. That's a win! by cps42 · · Score: 2, Funny

    Guppies make too many babies in my tank, any way. How do we order these?

  4. Fringe benefits by Tablizer · · Score: 5, Funny

    Researcher: "We didn't find anything commercially useful, but at least the fish can do my taxes for me."

  5. They were actually able to go past 9.3% on brains. by Sheetrock · · Score: 4, Funny

    But for some reason, the very smartest guppies had no interest in swimming at all but would just hang around the bottom of the tank, head side down.

    --

    Try not. Do or do not, there is no try.
    -- Dr. Spock, stardate 2822-3.




  6. I'd gladly trade..... by dcigary · · Score: 4, Funny

    ...a smaller gut for a bigger brain. Alas, it was not meant to be...

    --
    ...my Karma ran over your Dogma...
  7. Re:Friend by rubycodez · · Score: 4, Funny

    Woah, this intelligent guppy posts on slashdot with an ID. The ones I bred only post AC