Status and Trends

Reports & Publications

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Subtopics

Inland Waters

Rivers & Streams

Related Subjects

Threatened and Endangered Species

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Did You Know...?

Amphibians & Reptiles

Antarctica is the only continent that has no native amphibian species. Amphibians and reptiles are very important vertebrates on the Pacific Islands. Surprisingly, given their importance, there are only six reptiles native to the Hawaiian Islands and all of them live in the sea. The rest of Hawaii's reptiles and amphibians are invaders. Learn more about amphibians from the NBII Pacific Basin Information Node website

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Manatee Research (Sirenia Project)

Publisher: USGS | Science Center: Florida Integrated Science Center (FISC, Gainesville) | Format: URL

fl.biology.usgs.gov — Web page for the Sirenia Project, a USGS Florida Integrated Science Center project that conducts studies on the West Indian manatee (Trichechus manatus). Includes links to manatee research in the news, international research, publications and presentations, and project staff contact information.

Environmental Endocrine Disrupters: Effects and Possible Mechanism(s) in Young Male River Otters

Publisher: USGS | Science Center: Forest and Rangeland Ecosystem Science Center (FRESC, Corvallis) | Format: URL

fresc.usgs.gov — The river otter (Lontra canadensis) is a top predator of most aquatic food chains. The goal of this study is to further evaluate the relationship among the contaminants and observed reproductive organ hypoplasia in young male river otters, their occurrence, and mode of action or mechanism that causes hypoplasia with a larger series of data from More...