MIGRATORY TIMING OF HUMPBACKWHALES (MEGAPTERA NOVAEANGLIAE) IN THE CENTRALNORTH PACIFIC VARIES WITH AGE, SEX AND REPRODUCTIVESTATUS by

• Main Authors: Alison S. Craig, Louis M. Herman, Christine M. Gabriele, Adam A. Pack, Adam Frankel, Tom Freeman, Paul Forestell, David Helweg, Mike Hoffhines, Anjanette Perry, Neil Polehn, Sue Lynn Reif, Scott Spitz
• Other Authors: The Pennsylvania State University CiteSeerX Archives
• Format: Text
• Language: English
• Subjects: Pacific; Megaptera novaeangliae
• Online Access: http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.567.2129; http://www.dolphin-institute.org/our_research/pdf/craig_etal2003.pdf

Humpback whales migrate seasonally between high-latitude summer feeding grounds and low-latitude winter breeding grounds. Identi cation photographs of humpback whales were collected in the Hawaiian Islands between 1977 and 1995, and sighting histories were com-piled for individuals.Analyses revealed that (a) mean dates of rst identi cation were signif-icantly earlier for juveniles and females with no calf than for males and females with a calf off the Big Island, and signi cantly earlier for juveniles than for females with no calf, males and females with a calf off Maui; and (b) mean dates of last identi cation were signi cantly earlier for juveniles and females with no calf than for males and females with a calf off the