Choked Up: How dead zones affect fish reproduction

By Janet Raloff, 15:51 PM April 15, 2008

Several U.S. research teams report reproductive problems in Gulf Coast fish that periodically encounter oxygen at concentrations as low as those in so-called dead zones (SN: 6/5/04, p. 360: Dead Waters). Two teams have also turned up gene changes that may underlie the diminished, less productive gonads found in these fish.

Christie A. Landry of Southeastern Louisiana University in Hammond and her colleagues studied Gulf killifish, a type of minnow, in three bays where oxygen concentrations va...

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