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Title	Grass carp (Triploid)
Alternative Title	Ctenopharyngodon idella
Creator	Persons, Susan "Nikki"
Description	Grass carp is an Asian fish species that was imported into the United States in the 1960s. Because many conservationists wanted to reduce human dependencies on use of toxic chemicals, This introduction was considered to be an alternative to spraying herbicides to control aquatic vegetation. Grass carp remain valuable as a non-chemical, biological method to control invasive plants that can choke water distribution canals that provide irrigation and drinking water, and impair the intended use of ponds and lakes. But grass carp can also have a negative environmental impact if they spawn and over populate a water system. In response to the concern that non-native grass carp might be spread across the nation, the USFWS invested time and effort to find a way to keep grass carp from spawning. Subsequent studies resulted in the development of a functionally sterile triploid grass carp. Moreover, both states and industry worked with USFWS to build a set of safeguards for using triploid grass carp; which grew into the National Triploid Grass Carp Inspection and Certification Program (website reference if appropriate). In practice, the USFWS certifies (federal embossed seal) that the grass carp being shipped from a participating triploid grass carp producer to a specific destination should not contain diploid (fertile) grass carp. The Program is used by many state managers that prefer the use of sterile triploid grass carp, as an alternative to toxic herbicides, for the control of their invasive aquatic vegetation.
Subject	Fishes Fisheries management
Location	Arkansas
FWS Site	WARM SPRINGS FISH TECHNOLOGY CENTER
Publisher	U.S. Fish and Wildlife Service;
Date of Original	2012-1-20
Type	Still Image
Format	JPG
Item ID	WO1017SPersons
Source	Washington, D.C. Library
Rights	Public Domain
Audience	General
File Size	7052251 Bytes
Height	2241
Width	3000
Color Space	RGB
Original Format	Image
Full Resolution File Size	7052251 Bytes
Full resolution	Volume297/HS, Side View of Triploid Grass Carp 1.JPG http://digitalmedia.fws.gov/FullRes/natdiglib/Volume297/HS, Side View of Triploid Grass Carp 1.JPG
Date created	2012-02-03
Date modified	2012-02-03