Shown here is a small colony of the threatened Elkhorn coral, Acropora palmata, that has become "bleached," that is, lost all its algal symbionts (also called zooxanthellae) because of the summer 2023 ocean-heat wave. The coral is attached to a cement block as part of the U.S.
Images
Multimedia related to the Species Management Research Program are shown below. Click on an image to see a larger view and additional details.
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Bleached Elkhorn coral now under shade in Biscayne National Park
Shown here is a small colony of the threatened Elkhorn coral, Acropora palmata, that has become "bleached," that is, lost all its algal symbionts (also called zooxanthellae) because of the summer 2023 ocean-heat wave. The coral is attached to a cement block as part of the U.S.
Elkhorn coral suffering from bleaching in Dry Tortugas National Park, Pulaski Shoal
Shown here is a colony of the threatened Elkhorn coral, Acropora palmata, that has succumbed to "bleaching," that is, lost all its algal symbionts (also called zooxanthellae) because of the summer 2023 ocean-heat wave. The coral is attached to a cement block as part of the U.S.
Shown here is a colony of the threatened Elkhorn coral, Acropora palmata, that has succumbed to "bleaching," that is, lost all its algal symbionts (also called zooxanthellae) because of the summer 2023 ocean-heat wave. The coral is attached to a cement block as part of the U.S.
Divers putting shades over experimental Elkhorn corals in Biscayne National Park
Shown here are three SCUBA divers installing shade structures over experimental Elkhorn corals (Acropora palmata) that have become "bleached," that is, lost all their algal symbionts (also called zooxanthellae) because of the summer 2023 ocean-heat wave. The corals are attached to cement blocks as part of the U.S.
Shown here are three SCUBA divers installing shade structures over experimental Elkhorn corals (Acropora palmata) that have become "bleached," that is, lost all their algal symbionts (also called zooxanthellae) because of the summer 2023 ocean-heat wave. The corals are attached to cement blocks as part of the U.S.
Bleached Elkhorn coral in Dry Tortugas National Park
Shown here is a colony of the threatened Elkhorn coral, Acropora palmata, in Dry Tortugas National Park that has become "bleached," that is, lost all its algal symbionts (also called zooxanthellae) because of the summer 2023 ocean-heat wave.
Shown here is a colony of the threatened Elkhorn coral, Acropora palmata, in Dry Tortugas National Park that has become "bleached," that is, lost all its algal symbionts (also called zooxanthellae) because of the summer 2023 ocean-heat wave.
Bleached Elkhorn coral under a shade in Dry Tortugas National Park, Pulaski Shoal
Shown here is a colony of the threatened Elkhorn coral, Acropora palmata, that has become "bleached," that is, lost all its algal symbionts (also called zooxanthellae) because of the summer 2023 ocean-heat wave. The coral is attached to a cement block as part of the U.S.
Shown here is a colony of the threatened Elkhorn coral, Acropora palmata, that has become "bleached," that is, lost all its algal symbionts (also called zooxanthellae) because of the summer 2023 ocean-heat wave. The coral is attached to a cement block as part of the U.S.
Bleached Elkhorn coral under a shade in Dry Tortugas National Park, Garden Key
Shown here is a colony of the threatened Elkhorn coral, Acropora palmata, that has become "bleached," that is, lost all its algal symbionts (also called zooxanthellae) because of the summer 2023 ocean-heat wave. The coral is attached to a cement block as part of the U.S.
Shown here is a colony of the threatened Elkhorn coral, Acropora palmata, that has become "bleached," that is, lost all its algal symbionts (also called zooxanthellae) because of the summer 2023 ocean-heat wave. The coral is attached to a cement block as part of the U.S.
Bat passive acoustic recording device
This passive acoustic recording device has been deployed in Montana (MT) as part of the North American Bat Monitoring Programs (NABat) summertime survey efforts. It has an ultrasonic microphone placed at the top of a 10ft pole that records echolocating bats fro
This passive acoustic recording device has been deployed in Montana (MT) as part of the North American Bat Monitoring Programs (NABat) summertime survey efforts. It has an ultrasonic microphone placed at the top of a 10ft pole that records echolocating bats fro
Another Columbia spotted frog (Rana luteiventris) collected for methylmercury sampling in Montana.
linkA Columbia spotted frog (Rana luteiventris) collected for methylmercury sampling in Montana.
Another Columbia spotted frog (Rana luteiventris) collected for methylmercury sampling in Montana.
linkA Columbia spotted frog (Rana luteiventris) collected for methylmercury sampling in Montana.
Who's who? Print casts of grizzly (top) and black bear (bottom).
Who's who? These are print casts of front and back paw prints of a grizzly bear (top) and black bear (bottom). The casts on the right are the front paws of each species; the casts on the left are the back. How do you tell?
Who's who? These are print casts of front and back paw prints of a grizzly bear (top) and black bear (bottom). The casts on the right are the front paws of each species; the casts on the left are the back. How do you tell?
Gulf Coast Waterdog - Necturus beyeri
Source: USGS National Wetlands Research Center. Photographer: Brad M. Glorioso. St. Tammany Parish, Louisiana
Necturus beyeri - Gulf Coast Waterdog
Source: USGS National Wetlands Research Center. Photographer: Brad M. Glorioso. St. Tammany Parish, Louisiana
Necturus beyeri - Gulf Coast Waterdog
Sea Otters
Three of the nine wild sea otter populations in the U.S. are federally listed as threatened. In California, USGS biologists have lead an annual population census to assess the local populations' recovery, working closely with state agencies and the Monterey Bay Aquarium.
Three of the nine wild sea otter populations in the U.S. are federally listed as threatened. In California, USGS biologists have lead an annual population census to assess the local populations' recovery, working closely with state agencies and the Monterey Bay Aquarium.
Pallid sturgeon free embryo at approximately 2 days post-hatch
Pallid sturgeon free embryo at approximately 2 days post-hatch, approximately 11-12 mm (about 0.45 of an inch) in length.
Pallid sturgeon free embryo at approximately 2 days post-hatch, approximately 11-12 mm (about 0.45 of an inch) in length.
Pallid sturgeon free embryo at approximately 5 days post-hatch
Figure 3. Pallid sturgeon free embryo at approximately 5 days post-hatch, approximately 14-15 mm (about 0.57 of an inch) in length.
Figure 3. Pallid sturgeon free embryo at approximately 5 days post-hatch, approximately 14-15 mm (about 0.57 of an inch) in length.
Pallid sturgeon free embryo at approximately 10 days post-hatch
Pallid sturgeon free embryo at approximately 10 days post-hatch, approximately 19-20 mm (about 0.77 of an inch) in length.
Pallid sturgeon free embryo at approximately 10 days post-hatch, approximately 19-20 mm (about 0.77 of an inch) in length.
Hydraulic Habitat Assessment Boat
A U.S. Geological Survey hydraulic habitat assessment boat in not enough water.
A U.S. Geological Survey hydraulic habitat assessment boat in not enough water.
Night Sampling
USGS Fish Biologist Dave Combs searches through net contents for larval fish during night sampling on the Upper Missouri River.
USGS Fish Biologist Dave Combs searches through net contents for larval fish during night sampling on the Upper Missouri River.
Night Sampling Boat
USGS fish biologist Dr. Pat Braaten and student contractor Garrett Cook inspect contents of a larval fish net during night sampling on the Upper Missouri River.
USGS fish biologist Dr. Pat Braaten and student contractor Garrett Cook inspect contents of a larval fish net during night sampling on the Upper Missouri River.
Ichthyoplankton Sample
Typical contents of a net deployment showing larval fish, possibly pallid sturgeon.
Typical contents of a net deployment showing larval fish, possibly pallid sturgeon.
ADCP Data Review
Research hydrologist Dr. Susannah Erwin and hydrologic technician Brian Anderson inspect ADCP data on the Upper Missouri River.
Research hydrologist Dr. Susannah Erwin and hydrologic technician Brian Anderson inspect ADCP data on the Upper Missouri River.
Pre-Sample Briefing
Pre-deployment briefing for the Upper Missouri River Pallid Sturgeon Drift Study. Fish biologists and physical scientists from Montana Fish Wildlife and Parks, US Geological Survey, U.S. Fish and Wildlife Service, University of Montana, Nebraska Game and Parks Commission, and US Army Corps of Engineers go over the sample design and assignments.
Pre-deployment briefing for the Upper Missouri River Pallid Sturgeon Drift Study. Fish biologists and physical scientists from Montana Fish Wildlife and Parks, US Geological Survey, U.S. Fish and Wildlife Service, University of Montana, Nebraska Game and Parks Commission, and US Army Corps of Engineers go over the sample design and assignments.
Larval Release
Simultaneous mass release of 700,000 free embryos from boats distributed across the channel of the Upper Missouri River.
Simultaneous mass release of 700,000 free embryos from boats distributed across the channel of the Upper Missouri River.