Western Fisheries Research Center

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Virus-exposed fathead minnow
January 22, 2007

Investigation and Disease Prevention of Spring Viremia of Carp Virus

Typical clinical signs of SVC disease, exopthalmia and abdominal distension with hemorrhaging seen in a virus-exposed fathead minnow.

Appearance of descaling site exposed to fast green FCF dye
October 31, 2006

Figure 1. Appearance of Descaling Site Exposed to Fast Green FCF Dye

Figure 1. Appearance of descaling site exposed to fast green FCF dye six hours after intentional descaling injury, showing loss of scales and presence of fast green staining. Areas of unintentional integumental injury are also stained (arrows).

Related image Figure 2.

Scanning electron micrograph of descaling area
October 31, 2006

Figure 2. Scanning Electron Micrograph of Descaling Area

Figure 2. Scanning electron micrograph of descaling area delimited by box in Figure 1 showing epidermal disruption, empty scale pockets and an exposed scale with visible concentric ridges (upper right). Scale bar = 500 µm.

Figure 3. Appearance of Descaling Site Exposed to Fast Green FCF Dye
October 30, 2006

Figure 3. Appearance of Descaling Site Exposed to Fast Green FCF Dye

Figure 3. Appearance of descaling site exposed to fast green FCF dye 96 hours after intentional descaling injury, showing lack of scales, presence of fast green staining in areas of epidermal disruption and absence of staining in areas where migrating epidermal cells have closed the wound.

 Related image

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Figure 4. Scanning Electron Micrograph of Descaling Area
October 30, 2006

Figure 4. Scanning Electron Micrograph of Descaling Area

Figure 4.  Scanning electron micrograph of descaling area delimited by box in Figure 3 showing epidermal disruption (arrows), empty scale pockets and restoration of epidermal integrity (asterisk). An exposed scale with visible concentric ridges is visible at the lower center. Scale bar = 500 µm.

Weighing sturgeon
September 30, 2006

Researcher weighing a sturgeon

Researcher weighing sturgeon.  Columbia River, bottom trawl for young-of-year (YOY) indexing.

Koi infected with spring viremia of carp virus
August 2, 2006

Investigation and Disease Prevention of Spring Viremia of Carp Virus

Typical clinical signs of disease, pop eye, dermal hemorrhages, abdominal distension, and hemorrhages at the base of fins, displayed in koi infected with spring viremia of carp virus (SVCV).

Downloading data in flood
April 17, 2006

Downloading data during a flood on the Klamath River

Downloading data during a flood on the Klamath River.

The Dalles Dam Chinook salmon monitoring
July 12, 2005

The Dalles Dam Chinook salmon monitoring

Juvenile Chinook salmon monitoring below the The Dalles Dam on the Columbia River.

Juvenile herring with classic signs of VHS
June 1, 2005

Juvenile herring with classic signs of VHS

Juvenile herring with classic signs of VHS including focal hemorrhaging around the eyes, mouth, and fin bases.

Researcher works at microscope
May 12, 2005

Researcher working at the microscope

Researcher, works at the microscope, Marrowstone Marine Field Station, Nordland, WA.