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| NAS - Nonindigenous Aquatic Species |
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Common Name: redtail notho
Taxonomy: available through 
Identification: Diagnostic characteristics and definition of genus were given by Parenti (1981). Color photographs appeared in Axelrod et al. (1985) and Scheel (1990).
Size: 5 cm.
Native Range: Tropical Africa. Type locality not clearly known, may be island of Zanzibar (Scheel 1990).
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Nonindigenous Occurrences: This species was introduced into Oahu, Hawaii, ca. 1967 (Kanayama 1968; Maciolek 1984).
Means of Introduction: mported and released by the Hawaii State Department of Health for possible use as mosquito control agents (Kanayama 1968).
Status: Reported from Hawaii. Kanayama (1968) listed this species as one that may become established in Hawaii; however, later accounts (e.g., Devick 1991b) indicated that it did not persist.
Impact of Introduction: Unknown.
Remarks: Nothobranchius are annual fishes; they are able to maintain permanent populations in temporary habitats by combining rapid growth and development with diapausing eggs that survive the dry season buried in the mud. Nothobranchius guentheri was used for experimental purposes at the Agricultural Experiment Station at the University of California at Riverside; however, the experiment lasted only one year (1964-1965) and was terminated, supposedly because the species was intolerant of low water temperatures (Dill and Cordone 1997). There is no evidence that the species was ever released into California open waters.
There are no known voucher specimens.
Axelrod, H. R., W. E. Burgess, N. Pronek, and J. G. Walls. 1985. Dr. Axelrod's atlas of freshwater aquarium fishes. Tropical Fish Hobbyist Publications, Inc., Neptune City, NJ.
Maciolek, J. A. 1984. Exotic fishes in Hawaii and other islands of Oceania. Pages 131-161 in W. R. Courtenay, Jr., and J. R. Stauffer, Jr., editors. Distribution, biology, and management of exotic fishes. The Johns Hopkins University Press, Baltimore, MD.
Scheel, J. J. 1990. Atlas of killifishes of the Old World. Tropical Fish Hobbyist Publications, Inc., Neptune City, NJ.
Other Resources:
FishBase Fact Sheet
Author: Leo Nico
Revision Date: 12/6/1999 Citation for this information:
Leo Nico. 2009. Nothobranchius guentheri. USGS Nonindigenous Aquatic Species Database, Gainesville, FL.
<http://nas.er.usgs.gov/queries/FactSheet.asp?speciesID=315> Revision Date: 12/6/1999
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