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Dexter's long-term goals for the
Conservation Genetics program is to use the laboratory to address genetic components of multi regional Recovery programs, and to aid in the accomplishment of the Southwest Regions Fisheries Program Strategic Plan goals. These objectives are attainable through the use
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Broodfish from these species are purposely reared at the center for spawning. Each year the center will spawn over 350 pairs of the broodfish using the induced spawning method. These pairs will produce over 3.5 million eggs. This count does not include those that will spawn naturally in the earthen
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Dexter's future
Conservation Genetics program includes the short-term goal of developing genetic baselines for all species cultured and maintained at Dexter. Genetic information will be used to develop strategies for ensuring that genetic diversity is maintained in captive stocks, and to avoid such
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Traditionally, the spawning season at the Dexter
National Fish Hatchery & Technology Center starts in March and ends in mid-June. The techniques the Center employs are induced spawning and natural spawning. Seventeen different species on the endangered and threatened list are spawned at the
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markers, and DNA sequences. Dexter's program of rearing threatened and endangered fish relies on this data to provide genetically appropriate fish for stocking, and to monitor the purity of 16 species of endangered fish that are held as refugium stocks.
293:- Calcien Marking: Immersion fluorescent marker that adheres to boney parts of the fish. The fins and cranium seem to be the most susceptible parts of the fish. When placed under blue light, the marked areas exhibit fluorescence.
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ponds. Fish from each spawn will be taken and held at the station for future broodstock, ensuring genetic diversity. Different pairs of each species are spawned each year, discouraging spawning of the same fish year after year.
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In 2021, the
Southwestern Native Aquatic Resources and Recovery Center held 14 warmwater fish species. Five of those are their main species, with the rest only spawning intermittently or being maintained as refuge populations.
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Currently, the Center uses four different methods. These methods are used as an identification tool. Biologists both in the field and on-site are able to identify fish that are reared at a facility versus those that are wild:
298:- Visible Implant Elastomer (VIE): Colored fluorescent elastomer material is injected into tissue with a hypodermic syringe. The material then cures into a pliable, solid well-defined mark, which fluoresces under blue light.
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Close monitoring at the hatchery include developing propagation and culture techniques, conducting water quality data, diet and nutrition testing, life history studies, reproductive physiology and genetic management.
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of science and technology, by developing and applying genetic conservation principles to the management of species produced and maintained at Dexter, thereby increasing the success of resources conservation.
308:- Wire Tagging: The Mark IV Tagging device emits a small magnetic wire tag that is injected just below the surface skin in various locations on the fish. Tags are read using a hand-held wand detector.
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The success the center has experienced in spawning is evident in its distribution of the species into their natural habitat. Without this type of intervention the chances of these species being
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303:- Passive Integrated Transponder (PIT): Small microchips (about the size of a grain of rice) that are injected with a hypodermic syringe and read with a hand-held scanner.
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Dexter's
Conservation Genetics Laboratory is fully equipped for routine genetic analysis with modern equipment designed to generate genetic information from
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for each species. Fish are raised from these broodstocks with the intent of reintroducing them into their native habitat.
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Visible
Implant Elastomer inserted in the anal fin of a southern leatherside chub,
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facility dedicated to fish culture techniques for threatened and
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Recording length and weight before spawning
Colorado pikeminnow
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63:"Southwestern Native Aquatic Resources and Recovery Center"
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Southwestern Native
Aquatic Resources and Recovery Center
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Southwestern Native
Aquatic Resources and Recovery Center
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Buildings and structures in Chaves County, New Mexico
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Agricultural buildings and structures in New Mexico
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371:National Fish Hatcheries of the United States
138:fishes of the American Southwest. Located in
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196:The station maintains a genetically diverse
50:. Unsourced material may be challenged and
245:Artificial spawning of Colorado pikeminnow
114:Learn how and when to remove this message
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48:adding citations to reliable sources
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391:1931 establishments in New Mexico
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