1. Department of Biology, The University of Texas at Tyler, Tyler, TX 75799, USA
2. Pacific Biological Station, Fisheries and Oceans Canada, Nanaimo, BC V9T 6N7, Canada
3. Institute of Ocean Sciences, Fisheries and Oceans Canada, Sidney, BC V8L 4B2, Canada
4. M.B. Laboratories, Sidney, BC V8L 5Y1, Canada