USFWS National Digital Library

- Baited trap used to capture nutria
- Aquatic animals; Invasive species; Mammals; Rodents; Wildlife management; Trapping; Tagging;
- A trap baited with carrots and apples awaits a nutria to venture out of the water and investigate. The animals are trapped in order to tag them to better understand the habits of nutria and to prevent their spreading.
- Images
- Capturing nutria
- Aquatic animals; Invasive species; Mammals; Rodents; Wildlife management; Trapping; Tagging;
- A safe trap awaits a nutria to venture out of the water and investigate. The animals are trapped in order to tag them to better understand the habits of nutria and to control populations.
- Images
- Anesthetizing Nutria Prior to Tagging
- Aquatic animals; Invasive species; Mammals; Rodents; Wildlife management; Trapping; Tagging; Biologists (USFWS);
- A nutria is given a shot to put it to sleep while the collar is measured. Tagging the animals will help biologists to better understand the nutria as well as prevent their spreading.
- Images
- Weighing Caged Nutria
- Aquatic animals; Invasive species; Mammals; Rodents; Wildlife management; Trapping; Tagging; Biologists (USFWS);
- Every nutria is weighed before tagging. Tagging the animals will help biologists to better understand the habits of nutria and prevent their spreading
- Images
- Nutria Health Exam
- Aquatic animals; Invasive species; Mammals; Rodents; Wildlife management; Trapping; Tagging;
- A nutria is given a health exam before being tagged. Tagging the animals will help biologists to better understand nutria and prevent their spreading.
- Images
- Tagged Nutria
- Aquatic animals; Invasive species; Mammals; Rodents; Wildlife management; Trapping; Tagging;
- A collar is successfully attached to the nutria. Tagging the animals will help biologists to better understand the nutria and to prevent their spreading.
- Images
- Nutria tags are prepared
- Aquatic animals; Invasive species; Mammals; Rodents; Wildlife management; Trapping; Tagging; Biologists (USFWS);
- Biologists prepare a tag for a nutria. The animals are trapped in order to tag them to better understand the habits of nutria and to prevent overpopulation.
- Images
- Captured nutria awaits tagging
- Aquatic animals; Invasive species; Mammals; Rodents; Wildlife management; Trapping; Tagging;
- A nutria in a cage waits to get a tail tag. Tagging the animals will help biologists better understand the animal and prevent their spread.
- Images
- Caged Nutria
- Aquatic animals; Invasive species; Mammals; Rodents; Wildlife management; Trapping; Tagging;
- A caged nutria, waiting to be tagged. The animals are trapped in order to tag them to better understand the habits of nutria and preventing their spreading.
- Images
- Tagging Nutria with Radio Telemetry Devices
- Aquatic animals; Invasive species; Mammals; Rodents; Wildlife management; Trapping; Tagging; Biologists (USFWS);
- The U.S. Fish and Wildlife Service does studies to find out how these animals affect habitat and other species. Biologists adjust the collar on this nutria prior to releasing him.
- Images
- Sample Testing of Spawned Salmon
- Fish hatcheries; Fisheries management; Fishes; Employees (USFWS); Biologists (USFWS); Work of the Service;
- Scale and genetic testing are performed on some of the fish after they have donated to the spawning process.
- Images
- Spawning Room
- Fish hatcheries; Fisheries management; Fishes; Employees (USFWS); Biologists (USFWS); Work of the Service;
- The spawning room at the Spring Creek National Fish Hatchery.
- Images
- Salt Water Is Added to the Eggs
- Fish hatcheries; Fisheries management; Fishes; Work of the Service;
- Each batch of eggs is mixed with salt water to assist in fertilization.
- Images
- Cleaning Equipment
- Fish hatcheries; Fisheries management; Fishes; Employees (USFWS); Biologists (USFWS); Work of the Service; uniforms; service patch;
- Everything is cleaned with an iodine solution and water after each use.
- Images
- Holding Room
- Fish hatcheries; Fisheries management; Fishes; Work of the Service;
- The holding room at Spring Creek National Fish Hatchery where the eggs will live until they hatch.
- Images
- Holding Area For Fertilized Eggs
- Fish hatcheries; Fisheries management; Fishes; Employees (USFWS); Biologists (USFWS); Work of the Service;
- The fertilized eggs are placed in these holding areas with an iodine solution, which kills bacteria.
- Images
- Male Chinook Being Milked
- Fish hatcheries; Fisheries management; Fishes; Employees (USFWS); Biologists (USFWS); Work of the Service; uniforms; service patch;
- Male Chinooks are milked and the eggs are then fertilized.
- Images
- Rinsing Eggs
- Fish hatcheries; Fisheries management; Fishes; Employees (USFWS); Biologists (USFWS); Work of the Service;
- The eggs are rinsed a final time.
- Images
- Chinook Salmon Waiting To Be Spawned
- Fish hatcheries; Fisheries management; Fishes; Work of the Service;
- The Chinook salmon are held here after making their way up the elevator into the spawning room.
- Images
- Female Chinook Being Spawned
- Fish hatcheries; Fisheries management; Fishes; Employees (USFWS); Biologists (USFWS); Work of the Service;
- The eggs are removed from the females and placed in a container. Each female Chinook has between 4,000-5,000 eggs.
- Images