USGS Multimedia Gallery for Set: Fish

Deep Sea Rockling Fish Among Mussels

unknown — Wed, 22 May 2013 00:00:00 EDT

A species of rockling (Family Lotidae), related to hakes and cods, rests among the mussels. Images courtesy Deepwater Canyons 2013 - Pathways to the Abyss expedition, NOAA-OER/BOEM/USGS.

Pacific Herring larvae

jgregg - at - usgs.gov (Jacob Gregg) — Tue, 21 May 2013 00:00:00 EDT

Herring larvae 15 days post-hatch. Food in the gut appears orange.

Pacific Herring Larvae

jgregg - at - usgs.gov (Jacob Gregg) — Tue, 21 May 2013 00:00:00 EDT

Herring larvae 53 day post-hatch. Black pigmentation is evident.

Pacific Herring Eggs on Macrophytes

jgregg - at - usgs.gov (Jacob Gregg) — Tue, 21 May 2013 00:00:00 EDT

Naturally-deposited herring eggs attached to submerged macrophytes. Coiled embryos are evident inside the eggs.

Pacific Herring School

jgregg - at - usgs.gov (Jacob Gregg) — Tue, 21 May 2013 00:00:00 EDT

Currently four age classes (0, 1, 2, and 4 year olds) of SPF herring are maintained at the Marrowstone Marine Field Station.

Pacific Herring Spawning Event

jgregg - at - usgs.gov (Jacob Gregg) — Tue, 21 May 2013 00:00:00 EDT

Small herring spawning event in Puget Sound, evidenced by the presence of 'white water', caused by mass release of spawning products into the water.

Sturgeon Embryo

adelonay - at - usgs.gov (Aaron DeLonay) — Tue, 25 Sep 2012 00:00:00 EDT

A free-drifting sturgeon embryo was captured in the Lower Missouri River in late August. Most sturgeon in the lower Missouri River spawn in the springtime.

Coastal Cutthroat Trout

David Leer — Mon, 14 May 2012 00:00:00 EDT

Close-up of coastal cutthroat trout from Camp Creek, western Oregon.

Cutthroat Trout

Steve Jacobs — Mon, 14 May 2012 00:00:00 EDT

Cutthroat trout in the Middle Fork Salmon River, Idaho.

Spawning Westslope Cutthroat Trout in the Flathead

cmuhlfeld - at - usgs.gov (Clint Muhlfeld) — Mon, 30 Apr 2012 00:00:00 EDT

This is spawning westslope cutthroat trout captured in Langford Creek, North Fork Flathead River, Montana.

Lowering a Hydroacoustic Transducer

unknown — Tue, 13 Dec 2011 00:00:00 EDT

Mikhail Malin, visiting IBIW scientist, prepares to lowers a hydroacoustic transducer into the water from a CERC research vessel below Bagnell Dam on the Osage River, Missouri. The CERC and IBIW collaborated with the Missouri Cooperative Fish and Wildlife Research Unit at the University of Missouri to assess the distribution of paddlefish below the dam using telemetry, sidescan sonar, and DIDSON.

Pallid Sturgeon in Holding Tank

unknown — Tue, 13 Dec 2011 00:00:00 EDT

Nine-year-old pallid sturgeon wait in holding tanks for their turn to be evaluated by biologists at CERC. More than 100 pallid sturgeon made the trip from Gavins Point National Fish Hatchery to Columbia on a snowy December day.

Newly Reconstructed Pond

unknown — Tue, 13 Dec 2011 00:00:00 EDT

Beau Griffith, a biological technician at CERC, stands at the bottom of one of the newly reconstructed ponds designed to conduct long-term studies with sturgeon and other riverine species. A divider and circulators can be installed in the sandy-bottomed ponds to create the continuous water current that sturgeon prefer.

Research Tent

unknown — Tue, 13 Dec 2011 00:00:00 EDT

Passersby at CERC probably wondered what was going on under the tent that appeared suddenly one December morning. Outside it was frigid, but inside it was warm as CERC biologists took blood samples and evaluated each of the new resident pallid sturgeon with ultrasound.

Pallid Sturgeon

unknown — Mon, 12 Dec 2011 00:00:00 EDT

Sabrina Davenport and Caleb Troutt, Five Rivers Services, LLC biologists performing work on the Missouri River for the CERC, hold pallid sturgeon PLS09-012 recaptured on November 1, 2011 near Nebraska City, Nebraska. Female pallid sturgeon PLS09-012 is in reproductive condition and will spawn in the spring of 2012.

High-resolution Sidescan Sonar Towfish

unknown — Mon, 12 Dec 2011 00:00:00 EDT

Mikhail Malin, visiting IBIW scientist, prepares to deploy a high-resolution sidescan sonar towfish below Bagnell Dam on the Osage River. The CERC and IBIW collaborated with the Missouri Cooperative Fish and Wildlife Research Unit at the University of Missouri to assess the distribution of paddlefish below the dam using telemetry, sidescan sonar, and DIDSON.

Stocking young Atlantic salmon in St. Lawrence River system

mlubeck - at - usgs.gov (Tony David) — Tue, 8 Nov 2011 00:00:00 EDT

Thousands of young Atlantic salmon are released into the St. Regis River system (a tributary of the St. Lawrence River) in an effort to restore this diminished Lake Ontario fish population. The salmon were reared at the USGS Tunison Laboratory in Cortland, N.Y., and are released by USGS scientists and members of the Mohawk Tribe.

This salmon release is part of a coordinated effort among the USGS Great Lakes Science Center and state, tribal, and Canadian fishery resource managers to restore Atlantic salmon in the Lake Ontario/St. Lawrence River drainage system.

Funding for the USGS Tunison Laboratory's salmon rearing capabilities comes from the Great Lakes Restoration Initiative and from a 2005 Congressional appropriation.

Stocking young Atlantic salmon in St. Lawrence River system

mlubeck - at - usgs.gov (Tony David) — Tue, 8 Nov 2011 00:00:00 EDT

Funding for the USGS Tunison Laboratory's salmon rearing capabilities comes from the Great Lakes Restoration Initiative and from a 2005 Congressional appropriation.

Stocking young Atlantic salmon in St. Lawrence River system

mlubeck - at - usgs.gov (Tony David) — Tue, 8 Nov 2011 00:00:00 EDT

Funding for the USGS Tunison Laboratory's salmon rearing capabilities comes from the Great Lakes Restoration Initiative and from a 2005 Congressional appropriation.

Releasing a Pallid Sturgeon

unknown — Thu, 13 Oct 2011 00:00:00 EDT

Female pallid sturgeon, PLS11-007, is released back into the Missouri River after an ultrasound evaluation of her reproductive condition.

USGS Scientist

unknown — Wed, 28 Sep 2011 00:00:00 EDT

Janice Albers presents study results at the 6th International Symposium on Sturgeon in Wuhan, China in 2009. USGS scientists and their collaborators in the Comprehensive Sturgeon Research Project provided six presentations at the symposium on topics ranging from reproductive readiness, migration, spawning, and population assessment of Missouri River sturgeons.

Drift and Retention of Sturgeon Larvae

unknown — Thu, 25 Aug 2011 00:00:00 EDT

Multibeam bathymetry (top) and current velocities (bottom) at the mouth of the Osage River mapped during high water June, 2011. Sturgeon telemetry positions (black squares) show concentrations in slow, deep water.

Pallid Eggs

unknown — Wed, 10 Aug 2011 00:00:00 EDT

Pallid sturgeon eggs freshly spawned and fertilized in a laboratory at the Columbia Environmental Research Center.

Juvenile Lake Sturgeon

unknown — Wed, 10 Aug 2011 00:00:00 EDT

Juvenile lake sturgeon propagated at the Columbia Environmental Research Center.

Newly Hatched Pallid

unknown — Wed, 10 Aug 2011 00:00:00 EDT

Newly hatched pallid sturgeon propagated at the Columbia Environmental Research Center.

Pallid Embryo

unknown — Wed, 10 Aug 2011 00:00:00 EDT

Pallid sturgeon embryo propagated at the Columbia Environmental Research Center.

Nebraska Game and Parks Commission Boat

unknown — Mon, 8 Aug 2011 00:00:00 EDT

Nebraska Game and Parks Commission collaborates with USGS on the Comprehensive Sturgeon Research Project tracking telemetered pallid sturgeon in the Missouri River.

Stump

unknown — Thu, 14 Jul 2011 00:00:00 EDT

This stump was captured in a trammel net in the Missouri River during efforts to recapture telemetry tagged sturgeon.

Listening

unknown — Thu, 14 Jul 2011 00:00:00 EDT

A USGS employee locates a telemetry tagged pallid sturgeon between attempts to recapture the fish with a trammel net in the Missouri River.

Recaptured Pallid

unknown — Thu, 14 Jul 2011 00:00:00 EDT

USGS employees Beau Griffith (left) and Becky Welly (right) hold a telemetered pallid sturgeon they recaptured in a trammel net. The wooden object with 2 white buoys to the right of Welly is call a "Buck" or a "Mule" and is used to pull the end of the net along in the current.

Post Ultrasound

unknown — Thu, 14 Jul 2011 00:00:00 EDT

The green arrow points to the ovary in this side view of the abdominal cavity of a telemetered pallid sturgeon. An ultrasound image two months prior revealed mature oocytes (eggs) in this female.

Pre Ultrasound

unknown — Thu, 14 Jul 2011 00:00:00 EDT

The green arrow points to mature oocytes (eggs) as lighter spec.

DST Implantation

unknown — Thu, 14 Jul 2011 00:00:00 EDT

Data storage tags (DST) implanted in telemetered pallid sturgeon record the water temperture and fish depth at pre-programed time intervals.

Deployment

unknown — Thu, 14 Jul 2011 00:00:00 EDT

Trammel net deployment on the Missouri River. The wooden object with 2 white buoys in the river is called a "Buck" or a "Mule" and is used to pull the end of the net along in the current.

R/V Lucien Brush

unknown — Wed, 6 Jul 2011 00:00:00 EDT

Hydroacoustic mapping boat R/V Lucien Brush mapping habitat during high water in the North Overton Bottoms Side-channel chute.

flooded Vegetation

unknown — Wed, 6 Jul 2011 00:00:00 EDT

Flooded vegetation along the Missouri River. Water is just over bank full, potentially providing young sturgeon access to floodplain habitats.

Yellowstone Tracking Boat

unknown — Thu, 16 Jun 2011 00:00:00 EDT

A radio tracking boat cruises down a flooded Yellowstone River in search of telemetered pallid sturgeon.

Black-and-White Larval Sturgeon

ageorge - at - usgs.gov (Amy George) — Tue, 14 Jun 2011 00:00:00 EDT

Collected in the Lower Missouri River on May 20, 2011, near Arrow Rock, Missouri, this larval sturgeon is estimated to be one day old.

Sturgeon Egg

unknown — Mon, 13 Jun 2011 00:00:00 EDT

At 68 hours post fertilization, this laboratory produced sturgeon egg is about ready to hatch.

Larval Sampling Net

unknown — Fri, 10 Jun 2011 00:00:00 EDT

The contents of the net are flushed into the cod end, or the trailing end of the net where the fish are finally caught. The cod is then emptied into black bowls for sorting.

Fish Eggs in Organic Debris

unknown — Fri, 10 Jun 2011 00:00:00 EDT

Ten minutes of larval sampling in the Missouri River on May 24, 2011, resulted in this mass of organic debris and fish eggs.

Hydrophone

unknown — Tue, 7 Jun 2011 00:00:00 EDT

Specialized, directional, underwater microphones, or hydrophones are lowered into the water to “hear” acoustic tags implanted in pallid sturgeon.

Telemetry Receivers

unknown — Tue, 7 Jun 2011 00:00:00 EDT

Acoustic receivers detect and process the acoustic signal from the telemetry tags telling the tracking crew which direction to go to find the fish, and even which fish it is.

Telemetry Receivers

unknown — Tue, 7 Jun 2011 00:00:00 EDT

Acoustic receivers detect and process the acoustic signal from the telemetry tags telling the tracking crew which direction to go to find the fish, and even which fish it is.

Larval Acipenseriformes

unknown — Tue, 7 Jun 2011 00:00:00 EDT

Acipenseriformes (sturgeon and paddlefish) larvae are somewhat easy to spot in the field thanks to their large yolk sac (yellow arrow). However, a microscope is necessary to differentiate between the two.

Implanting Telemetry Tag in Pallid Sturgeon

unknown — Fri, 3 Jun 2011 00:00:00 EDT

Acoustic telemetry tags have to be fairly small to fit inside a five to fifteen pound pallid sturgeon. The average tag is about the size of your ring finger (60-90 mm long and 16 mm diameter). That means the battery that powers the acoustic tag is small, too. A small battery means that the signal from the tag is relatively weak, or fairly quiet.

Tandem tracking

unknown — Fri, 3 Jun 2011 00:00:00 EDT

Biologist Sabrina Davenport tandem tracks the Lower Missouri River during high water on June 2, 2011. Two boats (note boat out window) tracking in tandem can detect fish effectively across a wider river and can turn to search behind wing dikes and sandbars where sturgeon can hide during higher flows.

Using a Microscope to Identify Larval Fish

unknown — Wed, 1 Jun 2011 00:00:00 EDT

Amy George uses a microscope and imaging software to measure larval Acipenseriformes collected in the Missouri River.

Larval Sturgeon

unknown — Wed, 1 Jun 2011 00:00:00 EDT

Collected in the Lower Missouri River, this sturgeon larvae is estimated to be about one day old.

Tandem Tracking

unknown — Tue, 31 May 2011 00:00:00 EDT

Biologists prepare to tandem track a flooded Missouri River in search of telemetered Pallid Sturgeon.

Research Vessel Lowering a Sand Cam

unknown — Wed, 25 May 2011 00:00:00 EDT

Research vessel Theodore R. Schmudde anchors in the swift water before lowering the sand cam (metal object suspended to the pulleys at the front of the boat).

Larval Sampling

unknown — Wed, 25 May 2011 00:00:00 EDT

Weighted, small mesh nets (left and right side of the boat attached to winches) are lowered to the bottom of the river near potential spawning sites. After a set period of time, the nets are raised and the contents are hand-picked for any Acipenseriformes (sturgeon and paddlefish) larvae. Samples are preserved for laboratory identification and genetic analysis.

Habitat Mapping

unknown — Wed, 25 May 2011 00:00:00 EDT

Equipped with a multibeam bathymetric system and acoustic Doppler current profiler, the research vessel Lucien Brush was deployed to make comprehensive maps of the potential spawning area. In order to collect precise location data, a base station is set-up within view of the area to be mapped. Luckily, a sandbar was still peaking above the river’s surface.

An Endangered Humpback Chub

George Andrejko — Thu, 19 May 2011 00:00:00 EDT

The Colorado River basin supports one of the most distinctive fish communities in North America, including the federally endangered humpback chub (Gila cypha). One of only six remaining populations of this fish is found in Grand Canyon National Park, Arizona. USGS scientists and their cooperators are responsible for monitoring the Grand Canyon population. The number Grand Canyon adult humpback chub--fish 4 years old and older and capable of reproduction--increased to approximately 7.650 fish between 2001 and 2008.

Caught Pallid Sturgeon

unknown — Tue, 26 Apr 2011 00:00:00 EDT

U.S. Fish & Wildlife Service employee holds a pallid sturgeon caught on a trotline at Lock and Dam 1 on the Osage River. The concrete pillars and walls in the background of the photo are what remains of the Lock and Dam 1 structure.

Incision in reproductive female pallid sturgeon

unknown — Mon, 18 Apr 2011 00:00:00 EDT

Upon making an incision in PLS11-008 in which to implant a telemetry transmitter, black eggs pushed to the surface. A few of the eggs were collected for analysis on how close she is to spawning.

Pallid Sturgeon Release

unknown — Fri, 15 Apr 2011 00:00:00 EDT

Biologists with the Nebraska Game and Parks Commission release a 3 kilogram non-reproductive male pallid sturgeon.

Sandcam Sample

unknown — Fri, 15 Apr 2011 00:00:00 EDT

Example image from the underwater micorscope.

Deploying Sandcam

unknown — Fri, 15 Apr 2011 00:00:00 EDT

Researchers are deploying an underwater microscope (or "sand-cam") from the R/V Theodore H. Schmudde.

Viewing Imagery

unknown — Fri, 15 Apr 2011 00:00:00 EDT

Researchers are viewing imagery obtained via the underwater microscope.

Blood Collection from Pallid Sturgeon

unknown — Fri, 8 Apr 2011 00:00:00 EDT

A blood sample is collected from every pallid sturgeon that is implanted with a telemetry transmitter.

Pipetting Plasma into Vials

unknown — Fri, 8 Apr 2011 00:00:00 EDT

Plasma separated from the blood by centrifuge of a pallid sturgeon is carefully divided into 3 vials. The plasma samples are immediately frozen for laboratory analysis.

Ultrasound of Pallid Sturgeon

unknown — Fri, 25 Mar 2011 00:00:00 EDT

An ultrasound is used to determine the reproductive condition of female pallid sturgeon.

Pallid Sturgeon Release

adelonay - at - usgs.gov (Aaron Delonay) — Fri, 18 Mar 2011 00:00:00 EDT

Following surgery and transmitter implantation, pallid sturgeon PLS11-002 was released at her capture location in the Lower Missouri River.

Pallid Sturgeon Release

adelonay - at - usgs.gov (Aaron Delonay) — Fri, 18 Mar 2011 00:00:00 EDT

Following surgery and transmitter implantation, pallid sturgeon PLS11-002 was released at her capture location in the Lower Missouri River.

Pallid Sturgeon Surgery

adelonay - at - usgs.gov (Aaron Delonay) — Fri, 18 Mar 2011 00:00:00 EDT

An incision just big enough to fit the transmitter is made in the belly of the sturgeon and a few stitches close it up. The stitches eventually dissolve but a small scar remains visible.

Pallid Sturgeon In Water

adelonay - at - usgs.gov (Aaron Delonay) — Fri, 18 Mar 2011 00:00:00 EDT

The sharp scutes along the back of the pallid sturgeon can be seen above the murky water it lives in.

Clipping a Baited Hook

unknown — Tue, 15 Mar 2011 00:00:00 EDT

Hooks baited with worms are clipped to trotlines in an effort to catch pallid sturgeon in the Lower Missouri River.

Adult Lionfish

James.Morris - at - NOAA.gov (James Morris, Jr.) — Fri, 11 Mar 2011 00:00:00 EDT

Adult lionfish, approximately 250 mm total length.

Juvenile Lionfish

James.Morris - at - NOAA.gov (James Morris, Jr.) — Fri, 11 Mar 2011 00:00:00 EDT

A group of juvenile lionfish, approximately 120 mm total length.

Tracking Equipment

unknown — Thu, 10 Mar 2011 00:00:00 EDT

SRX receivers (left) and a ruggedized laptop computer (right) are essential tools for telemetry tracking on the Lower Missouri River.

Pallidon Nets

unknown — Fri, 4 Mar 2011 00:00:00 EDT

Pallid sturgeon caught in the Lower Missouri River.

Clownfish

Shad O�Neel — Wed, 6 Oct 2010 00:00:00 EDT

Clownfish and a living sea anemone survive in a coral reef that has been decimated by natural and human disasters.

Convict Tangs in the Coral Reef at the Palmyra National Wildlife Refuge

kevin.lafferty - at - lifesci.ucsb.edu (Kevin Lafferty) — Fri, 1 Oct 2010 00:00:00 EDT

When diving the coral reefs of Palmyra, the sight and sound of convict tangs swarming the territory of other herbivores is remarkable.

A Blacktip Reef Shark in the Coral Reef at Palmyra National Wildlife Refuge

kevin.lafferty - at - lifesci.ucsb.edu (Kevin Lafferty) — Fri, 1 Oct 2010 00:00:00 EDT

A main feature of the Palmyra coral reef is the abundance of top predators, particularly sharks and jacks.

Larval Tapeworm Found on a Coral Reef Fish

kevin.lafferty - at - lifesci.ucsb.edu (Kevin Lafferty) — Fri, 1 Oct 2010 00:00:00 EDT

The most common parasites found in the Palmyra reef fish sampled were larval tapeworms. The abundance of parasites may be an indicator of a healthy ecosystem instead of an ill one as commonly believed.

A Looking in View

gcwinters - at - usgs.gov (Greg Winters) — Wed, 29 Sep 2010 00:00:00 EDT

observing the mass movement of salmon and steelhead through the dam.

A Time to Spawn

gcwinters - at - usgs.gov (Greg Winters) — Wed, 29 Sep 2010 00:00:00 EDT

Salmon and steelhead migrating through Bonnerville Dam.

Closing Seine Around Pivot Pole

carole_mcivor - at - usgs.gov (Carole McIvor) — Fri, 13 Aug 2010 00:00:00 EDT

Seining for fish in open water necessitates closing the seine quickly to avoid fish escape.� Closing the seine around a pole offshore accomplishes this objective in sampling.

Deploying Lift Net, Everglades National Park

carole_mcivor - at - usgs.gov (Carole McIvor) — Fri, 13 Aug 2010 00:00:00 EDT

Lift nets buried in the forest floor and deployed at high tide permit the estimation of fish density within flooded forests.

Closing Seine Around Pivot Pole, Everglades National Park

carole_mcivor - at - usgs.gov (Carole McIvor) — Fri, 13 Aug 2010 00:00:00 EDT

Seining for fish in open water necessitates closing the seine quickly to avoid fish escape.� Closing the seine around a pole offshore accomplishes this objective in sampling.

GCC BSC Set Block Net

carole_mcivor - at - usgs.gov (Carole McIvor) — Fri, 13 Aug 2010 00:00:00 EDT

Setting block net across an intertidal rivulet draining a hurricane-derived mudflat.� Net is retrieved at low tide to obtain an estimate of fish catch.� Fish density was found to be greater in waters draining natural tidal forests than in waters from mudflats formed as a result of landfall of a Category 5 hurricane on Cape Sable, Everglades National Park in 1935.�

Opening Center Bag of Seine, Everglades National Park

carole_mcivor - at - usgs.gov (Carole McIvor) — Fri, 13 Aug 2010 00:00:00 EDT

Sampling juvenile common snook following passage of Hurricane Wilma October 2005.� Storm surge from hurricane is hypothesized to have facilitated recruitment of this sportfish to presumptive Tarpon Bay nursery grounds in the following 18 months.

Seining Blocked-off Mosquito Ditch

carole_mcivor - at - usgs.gov (Carole McIvor) — Fri, 13 Aug 2010 00:00:00 EDT

Scientists pull a seine net through a blocked-off section of a man-made ditch to estimate fish abundance.

Seining Blocked-off Mosquito Ditch

carole_mcivor - at - usgs.gov (Carole McIvor) — Fri, 13 Aug 2010 00:00:00 EDT

Scientists pull a seine net through a blocked-off section of a man-made ditch to estimate fish abundance.

Seining, Everglades National Park

carole_mcivor - at - usgs.gov (Carole McIvor) — Fri, 13 Aug 2010 00:00:00 EDT

Scientists pull a seine net through an intertidal creek to estimate fish abundance.

Divers at Devils Hole

P. Barrett — Fri, 21 May 2010 00:00:00 EDT

Divers prepare to descend into Devils Hole to conduct research on the endangered Devils Hole pupfish

Divers in Devils Hole

P. Barrett — Fri, 21 May 2010 00:00:00 EDT

Divers conducting research on the endangered Devils Hole pupfish.

Snakehead Fish

unknown — Fri, 21 May 2010 00:00:00 EDT

Snakehead fish are originally from China and Korea, but recently they've been found in Maryland, Virginia, Arkansas, California, and Florida.

Devils Hole Habitat in the Mojave Desert

M. Clendenin — Fri, 21 May 2010 00:00:00 EDT

The endangered Devils Hole pupfish lives only in Devils Hole in the Mojave Desert.

Fathead Minnow

unknown — Wed, 19 May 2010 00:00:00 EDT

Fathead minnow

Buffalo Trunkfish (Lactophrys trigonus)