VIRGINIA STOCKED TROUT MANAGEMENT PLAN (2016-2025)
Biosecurity plans should be tailored to an individual facility; a generic biosecurity plan
should never be applied to an aquaculture facility; existing staff, budget constraints, estimated
risk, and available equipment all need to be considered. Biosecurity plans are dynamic
documents that should be reviewed on a regular basis and amended when situations change. The
first step in drafting a biosecurity plan is to critically examine each portion of the facility and all
aspects of production to identify potential biosecurity risks or hazards. The guidelines should
then be developed to minimize each potential risk to an acceptable level. While some risk is
unavoidable, the goal is to create a workable, enforceable, and practical biosecurity plan with an
acceptable level of risk.
VDGIF is initiating a standardized, system-wide disease monitoring plan for the VDGIF
coldwater fish cultural and rearing facilities in order to assess and classify each facility. This
will allow for the development of effective site-specific biosecurity plans, while reducing risk of
pathogen transfer among the agency’s fish rearing facilities and between fish captive-reared and
wild stocks. In addition, it will increase the ability for the agency to manage potential ecological
impacts of captive fish rearing and stocking. Production and stocking strategies have been
diligently adjusted to account for both fish health concerns and to protect natural resources but
also with the goal of maintaining fish production. VDGIF is also investigating other pathways to
reduce the risk of pathogen transfer from stocked fish to wild populations, including cooperative
interagency efforts, improved collaboration with private industry, and assessment of our
regulatory capacity.
Trout Species Produced By VDGIF
Rainbow Trout (Oncorhynchus mykiss)
Rainbow Trout prefer well oxygenated, high quality water less than 70 ˚F. Rainbow
Trout typically live in shallow rivers with gravel bottoms, but have established self-sustaining
populations in rivers with bedrock bottoms and spring creeks. Lake- resident Rainbow Trout
inhabit cool, deep lakes with sufficient habitat to get through the hot summer months and that
have an adequate food supply. Rainbow Trout eat a wide variety of prey, including insects,
crustaceans, mollusks, and small fish. The primary food supply depends on habitat and
availability of a particular prey within the habitat.
Rainbow Trout are native to the Pacific basin, from the Kamchatka Peninsula in Russia,
throughout the Aleutian Islands and southwest Alaska, the Pacific coast of British Columbia and
southeast Alaska, and south along the west coast of the U.S. to northern Mexico. Rainbow Trout
were originally found inland in the western U.S. occasionally as far east as the Rocky Mountains,
west of the continental divide and downstream of waterfalls and other natural barriers. Since
1875, Rainbow Trout have been widely introduced throughout the U.S. and the world. The first
rainbow-producing hatchery, established on San Leandro Creek in northern California in 1870,
began production in 1871. The first shipment of fish to other hatcheries occurred in 1875,
shipping fish to Caledonia, New York, and in 1876, to Northville, Michigan. In 1877, the first
National Fish Hatchery System was established on Campbell Creek in northern California.
Some of the earliest Rainbow Trout propagation and stocking in Virginia may have occurred at
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