Mixed Schools a Must for Fish?

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Science  05 Jul 2002:
Vol. 297, Issue 5578, pp. 31-33
DOI: 10.1126/science.297.5578.31a

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Two scientists have gone fishing in their laboratory to test the idea that selective culls could permanently alter the genetic makeup of wild fish stocks. On page 94, they say they've netted data suggesting that fisheries managers should rethink their rules if they want to prevent some stocks from swimming down dangerous evolutionary paths. Some biologists, however, say the lab-based results lend little to the current debate over how best to protect teetering populations.