U.S.-Japan Cooperative Research: Pinniped Evolution, Systematics and Biogeography in the North Pacific

美日合作研究：北太平洋鳍足类进化、系统学和生物地理学

• 批准号: 9417088
• 负责人: Annalisa Berta
• 金额: $ 2.58万
• 依托单位: San Diego State University Foundation
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1996
• 资助国家: 美国
• 起止时间: 1996-01-01 至 2000-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9417088&HistoricalAwards=false
• 关键词: U.S.; Japan; Cooperative; Research; Pinniped

9417088 Archibald This project represents a collaborative research effort by San Diego State University, the Natural History Museum (Chiba) and the National Science Museum (Tokyo) in Japan. The project will focus on morphological study of well preserved skulls and limb elements of fossil pinnipeds (seals, sea lions and walruses) from Japan in rock deposits that span the late Oligocene through the Pleistocene (27-.5 million years ago). Of special interest are basal pinnipeds ancestral to the major groups of living pinnipeds. These archaic fossil pinnipeds from Japan are second only to those in the US in number and diversity of species, making them of critical importance for studies of early pinniped evolution. By comparative study of these specimens in Japan and the US, the investigators wil be able to test current hypotheses of the evolutionary relationships among pinnipeds and their biogeographic history in the North Pacific. Project funding will enable a leading expert in the US and a graduate student to study fossil pinnipeds housed in various museum collections in Japan over the next three years. *** This project in systematic biology and paleontology will enable the initiation of collaborative work between colleagues in Japan and the US. This valuable collaboration represents a necessary first step toward the development of a comprehensive assesssment of pinniped origins and diversification in the North Pacific.

这个项目是由圣地亚哥州立大学、日本自然历史博物馆（千叶）和国立科学博物馆（东京）合作进行的。该项目将侧重于形态学研究保存完好的鳍足动物化石（海豹、海狮和海象）的头骨和肢体元素，这些化石来自日本的岩石沉积物，跨越晚渐新世到更新世（2750万年前）。特别令人感兴趣的是现存鳍足动物主要种群的基生鳍足动物祖先。这些来自日本的古老鳍足动物化石在物种数量和多样性方面仅次于美国，对研究早期鳍足动物的进化至关重要。通过对日本和美国的这些标本进行比较研究，研究人员将能够检验目前关于北太平洋鳍足类动物之间进化关系及其生物地理历史的假设。该项目的资金将使美国的一名顶尖专家和一名研究生在未来三年内研究日本各博物馆收藏的鳍足动物化石。***这个系统生物学和古生物学的项目将启动日本和美国同事之间的合作工作。这种宝贵的合作是对北太平洋鳍状鱼类起源和多样化进行全面评估的必要的第一步。