globalchange  > 过去全球变化的重建
DOI: 10.1016/j.palaeo.2013.10.005
论文题名:
Late pleistocene gray whales (eschrichtius robustus) offshore georgia, u.s.a., and the antiquity of gray whale migration in the north atlantic ocean
作者: Noakes S.E.; Pyenson N.D.; McFall G.
刊名: Palaeogeography, Palaeoclimatology, Palaeoecology
ISSN: 0031-0182
出版年: 2013
卷: 392
起始页码: 502
结束页码: 509
语种: 英语
英文关键词: Atlantic Ocean ; Fossil ; Gray whale ; Migration ; Pleistocene
英文摘要: Living gray whales (Eschrichtius robustus) are key consumers in benthic communities of the North Pacific Ocean. Gray whales, however, also inhabited the North Atlantic Ocean until recent historical times (~. 1600. AD), leaving open questions about their historical ecology in nearshore communities of this basin. Here we report the discovery of fossil remains from two individual gray whales recovered from underwater excavations at separate localities of JY Reef, an offshore reef situated approximately 32. kilometers (km) offshore of St. Catherine's Island, Georgia, U.S.A. Both mandibles are diagnostic to the living E. robustus. Radiometric dating of shells from JY Reef suggests an approximate age range of these two specimens between 42 and 30. thousand years before present (ka). Morphological measurements of the preserved elements indicate that both of the mandibles likely belonged to immature and possibly yearling individuals. Collectively, these findings are among the oldest occurrences of gray whales in the North Atlantic basin, and their presence at temperate latitudes provides limited support for the hypothesis that Atlantic gray whales used a southerly breeding area at the end of a migratory pathway, by analog with lagoonal breeding environments of Baja California, Mexico, for the extant California gray whales, and the breeding areas for the extant North Atlantic right whales (Eubalaena glacialis) off the Georgia coast today. Stronger support for this latter contention may stem from future fossil discoveries in the region, as well as ancillary lines of evidence, such as the remains of species-specific ectoparasites and/or ancient DNA (aDNA).© 2013 Elsevier B.V.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/69555
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作者单位: Center for Applied Isotope Studies, The University of Georgia, 120 Riverbend Road, Athens, GA 30602, United States; Department of Paleobiology, National Museum of Natural History, Smithsonian Institution, MRC 121, P.O. Box 37012, Washington, DC 20013-7012, United States; Department of Mammalogy, Burke Museum of Natural History and Culture, Seattle, WA 98195, United States; Grays Reef National Marine Sanctuary, National Oceanic and Atmospheric Administration, 10 Ocean Science Circle, Savannah, GA 31411, United States; Department of Paleontology, Burke Museum of Natural History and Culture, Seattle, WA 98195, United States

Recommended Citation:
Noakes S.E.,Pyenson N.D.,McFall G.. Late pleistocene gray whales (eschrichtius robustus) offshore georgia, u.s.a., and the antiquity of gray whale migration in the north atlantic ocean[J]. Palaeogeography, Palaeoclimatology, Palaeoecology,2013-01-01,392
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