Images

Scientists at the Arizona Cooperative Fish and Wildlife Research Unit worked with citizen-scientists in southern Arizona on a trail camera project to monitor endangered ocelot and overall biodiversity in 18 mountain ranges. The project included continuing education for the citizen scientists.

Graduate student Carli Baum is holding a johnny darter. The Colorado Cooperative Fish and Wildlife Research Unit leads research on winter stream temperatures below wastewater treatment plants and the reproductive development of the female johnny darter (Etheostoma nigrum).

Graduate student from the Montana Cooperative Fishery Research Unit is fly fishing in Montana. The Montana Unit conducts applied research aimed at addressing fisheries problems identified by State and Federal cooperators in the northern United States Rocky
Mountains and Great Plains. 

Yellowstone cutthroat trout from the upper Yellowstone drainage south of Yellowstone National Park.

Graduate student at the Wisconsin Cooperative Fishery Research Unit is collecting larval sturgeon fish samples.

Graduate student at the Wisconsin Cooperative Fishery Research Unit is dipping fish from a fyke net.

Smallmouth bass (Micropterus dolomieu) are an important fishery, and along Wisconsin’s Door Peninsula, there have been recent declines in catch rates for smallmouth bass greater than or equal to 18 inches (45.7 centimeters), prompting concerns among fisheries stakeholders.

Researchers at the West Virginia Cooperative Fish and Wildlife Research Unit are studying diamond darter to help understand stocking decisions. 

Shoal bass (Micropterus cataractae) is a popular sportfish that, like many bass with a limited distribution, has been affected by human disturbances on the riverscape.

Michelle Briggs from the Montana Cooperative Fishery Research Unit shows an angler how to measure a fish.

Much of the scientific results showing how hunting affects gray wolf (Canis lupus) populations is from the core of the species range in Canada and Alaska, where populations are connected and robust, and wolves are numerous. Less is known about how hunting and trapping might affect wolves in smaller populations such as those found in the Rockies.

Smallmouth bass research in Wisconsin may help fishery managers determine a sampling method to index recruitment before smallmouth bass enter the fishery and may address concerns regarding the effects of nest fishing on recruitment.

Students are working with biologists in Oregon to develop an experiment that examines effects of forest management practices on the endangered marbled murrelet (Brachyramphus marmoratus) in the Elliott State Research Forest. 

A lack of information about threats to Cascade red fox and of a process for identifying and evaluating potential conservation actions is complicating efforts to conserve this State-endangered species.

Washington is the nation’s leading producer of farmed clams, oysters, and mussels, including Manila clam (Ruditapes philippinarum), Pacific oyster (Magallana gigas), and Pacific blue mussel (Mytilus trossulus).

Researchers at the South Carolina Cooperative Fish and Wildlife Research Unit use several unique research avenues to address questions regarding movement, habitat use, physiology, and reproductive ecology of brown pelicans.

Postdoctoral Researcher Robert Paine is collecting environmental DNA from Little Chucky Creek, Tennessee, on a brisk morning. Personal Protective Equipment (PPE) is important for the safety of persons (e.g., life jackets), but also important for gathering robust, quality data (e.g., gloves to prevent contamination). 

Georgia Cooperative Fish & Wildlife Research Unit graduate student Zoe Scribner measures a Hybrid Striped Bass (Morone chrysops × M. saxatilis), while staff scientist Dr. Troy Simon records data, for a project assisting the Georgia Department of Natural Resources on Carters Lake, Georgia (Nov. 2024).

USGS researchers at the Vermont Cooperative Fish and Wildlife Research Unit have released AMMonitor 2, an R package design

A photo featuring the USGS Texas Cooperative Fish and Wildlife Research Unit (CRU) scientists and CRU Deputy standing on the dock in Rockport, Texas (from left to right), Clint Boal, Reynaldo Patino (retired), Kevin Pope, and Jane Rogosch. Photo taken by Kevin Mayes, Texas Parks and Wildlife Department) Copyright release on file.  

Mallard is a large dabbling duck, length 15-16 inches, with a wingspan up to 36 inches.