Seasonal blubber testosterone concentrations of male humpback whales (Megaptera novaeangliae)

ELIZABETH T. VU, Scripps Institution of Oceanography, University of California San Diego, 9500 Gilman Drive La Jolla, California 92093, U.S.A.; CASEY CLARK, Moss Landing Marine Laboratories, 8272 Moss Landing Road Moss Landing, California 95039, U.S.A.; KRISTA CATELANI, and NICHOLAS M. KELLAR, Southwest Fisheries Science Center, NOAA, 8901 La Jolla Shores Drive, La Jolla, California 92037, U.S.A.; JOHN CALAMBOKIDIS, Cascadia Research Collective, 2181⁄2 4th Avenue West, Olympia, Washington 98501, U.S.A.