Biological control is the use of living organism to control a vector. Biological control methods are very important in protecting the public from mosquitoes. The primary biological control we use is the mosquitofish, Gambusia affinis. The mosquitofish preys on mosquito larvae allowing us to keep mosquito populations under control.
The Fisheries Department is responsible for breeding mosquitofish and other fish species that prey on mosquito larvae. Mosquito-eating fish are readily available for our field technicians and to the general public through a service request program. We maintain 23 ponds which produce 2000-7000 pounds of fish annually. Today, we are one of the largest mosquitofish producing facilities in the nation.
Mosquitofish, Gambusia affinis
The mosquitofish, a live-bearing American fish, is utilized as a predator of mosquito larvae in many diverse aquatic habitats. A small species, the full-grown females are usually less than 2½ inches in total length, while males are typically under 1½ inches. The muted silver and light olive green body color is common to both sexes. In addition, they are able to lighten or darken their body color to closely match their immediate environment.
Guppies, Poecilia reticulata
Threespine Stickleback, Gasterosteus aculeatus
For more information, please click on the brochure Biological Control.
To request mosquitofish, please click here.
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