April 10, 2007
Humpback Whales Migrate Over 5,100 Miles
So you think you have a long commute?
MOSS LANDING, Calif. -- Marine scientists recently published a research paper in the science journal, biology letters, that found humpback whales migrate over 5,100 miles from Central America to their feeding grounds off Antarctica; a record distance undertaken by any mammal.Kristin Rasmussen, a biologist with Cascadia Research Collective, and lead author in the study, finds the record-breaking migration interesting, but is most pleased that the study validates a long held assumption that humpback whales travel to warm water areas during the winter.
"It was very exciting because for years everyone said humpback whales could be found in warmer waters during the winter months, but this was the first time we were actually able to quantify this on a global scale, and relate it to these long distance migrations" said Rasmussen.
Researchers conducted the survey by identifying individual humpback whales on their wintering area off Central America, and then comparing these with whales identified on their feeding areas off Antarctica. Identification of individual whales is accomplished by comparing a unique set of markings on their fluke, like a "fingerprint," with a catalog of photographs held by the Antarctic Humpback Whale Catalog at the College of the Atlantic in Bar Harbor, Maine.
The scientists found some humpbacks traveling from Antarctica across the equator to as far north as Costa Rica to overwinter, a distance of approximately 8,300 kilometers or about 5,157 miles. The authors noticed that the presence of cold water along the equator coincided with the occurrence of this northerly wintering area, not only in the eastern Pacific, where the Central American whales were studied, but also in the eastern Atlantic, where another southern hemisphere humpback whale population can be found north of the equator during winter.
Daniel Palacios, an oceanographer working out of NOAA's Southwest Fisheries Science Center laboratory in Pacific Grove, Calif., correlated sea-surface temperature with the whale migration by using data collected from satellites and distributed by the National Oceanographic Data Center.
"This study was possible thanks to the availability of reliable, high-resolution sea-surface temperature data collection that cover even the most remote regions of the globe," said Palacios.
The National Oceanic and Atmospheric Administration, an agency of the U.S. Commerce Department, is celebrating 200 years of science and service to the nation. From the establishment of the Survey of the Coast in 1807 by Thomas Jefferson to the formation of the Weather Bureau and the Commission of Fish and Fisheries in the 1870s, much of America's scientific heritage is rooted in NOAA.
NOAA is dedicated to enhancing economic security and national safety through the prediction and research of weather and climate-related events and information service delivery for transportation, and by providing environmental stewardship of our nation's coastal and marine resources. Through the emerging Global Earth Observation System of Systems (GEOSS), NOAA is working with its federal partners, more than 60 countries and the European Commission to develop a global monitoring network that is as integrated as the planet it observes, predicts and protects.
NOAA Fisheries Service is dedicated to protecting and preserving our nation's living marine resources and their habitat through scientific research, management and enforcement. NOAA Fisheries Service provides effective stewardship of these resources for the benefit of the nation, supporting coastal communities that depend upon them, and helping to provide safe and healthy seafood to consumers and recreational opportunities for the American public.
To learn more about NOAA Fisheries Service, please visit: www.nmfs.noaa.gov.