绪论 虎鲸类型和种群(第3/8 页)
d in 2008，“The taxonomy of this genus is clearly in need of review， and it is likely that O. orca will be split into a number of different species or at least subspecies over the next few years.“ Although large variation in the ecological distinctiveness of different orca groups plicate simple differentiation into types. Mammal-eating orcas in different regions were long thought likely to be closely related， but genetic testing has refuted this hypothesis.
Northern waters
North Pacific
Research off the west coast of Canada and the United States in the 1970s and 1980s identified the following three types:
Resident (fish-eating) orcas: The curved dorsal fins are typical of resident females.
Resident: These are the most monly sighted of the three populations in the coastal waters of the northeast Pacific. Residents' diets consist primarily of fish and sometimes squid， and they live in plex and cohesive family groups called pods. Female reside
更多内容加载中...请稍候...
本站只支持手机浏览器访问，若您看到此段落，代表章节内容加载失败，请关闭浏览器的阅读模式、畅读模式、小说模式，以及关闭广告屏蔽功能，或复制网址到其他浏览器阅读！
本章未完，请点击下一章继续阅读！若浏览器显示没有新章节了，请尝试点击右上角↗️或右下角↘️的菜单，退出阅读模式即可，谢谢！
本章未完，点击下一页继续。