Aquatic animals; Aquatic environments; Biological control; Habitat conservation; Invasive species; Population control; Work of the Service;
This is a plan to prevent zebra mussels and other aquatic nuisance species from spreading westward. This document includes background on the issue, including the current and potential impacts, ecological, economic and otherwise, the spread of these...
Aquatic animals; Aquatic environments; Environmental education; Fisheries management; Fishes; Fish hatcheries; Habitat conservation; Podcast; Public Lecture;
Phil Pister retired in February 1990 following 38 years as a fishery biologist with the California Department of Fish and Game. He studied wildlife conservation and zoology under A. Starker Leopold at the University of California (Berkeley) and...
Two manatee nuzzling noses together in Crystal River National Wildlife Refuge. Note scars on back on one manatee from boat propeller. For more information about manatees visit
Manatee playing with a crab trap line in Crystal River National Wildlife Refuge. Trap lines pose a common danger of entrapment for manatee.
For more information about manatees visit