U.S. Dept. of Commerce / NOAA / NMFS Scientific Publications Office
Nancy E. Kohler and Patricia A. Turner are with the Narragansett Laboratory, Northeast Fisheries Science Center, National Marine Fisheries Service, NOAA, 28 Tarzwell Drive, Narragansett, RI 02882-1199. John G. Casey, now retired, was with the Narragansett Laboratory, Northeast Fisheries Science Center, National Marine Fisheries Service, NOAA, 28 Tarzwell Drive, Narragansett, RI 02882-1199. E-mail: nancy.kohler@noaa.gov