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Warpaint shiners, like most other fish, possess an array of sensory organs to aid them in their environment. Warpaint shiners use their eyes to perceive their surroundings. They also have the ability to taste, which aids them in being able to differentiate between prey and harmful substances. They have the ability to hear and to smell, and they use their lateral line system to detect vibrations in the water.
Perception Channels: visual ; tactile ; acoustic ; vibrations ; chemical
Warpaint shiners are not listed as an endangered or threatened species.
US Federal List: no special status
CITES: no special status
Little is known about the early development of fertilized eggs and young fry of warpaint shiners. Warpaint shiners grow very rapidly in their first two years, reaching a maximum standard length of 58 mm by the end of the first summer and 85 mm by the end of the second. After the second year, growth rates of warpaint shiners slow significantly. Warpaint shiners become sexually mature at the age of two years, and spawn for the first time during their third summer (Outten, 1957).
Warpaint shiners have no known adverse effects to humans.
Though warpaint shiners are not a sport fish and do not have any commercial value, they may be beneficial in freshwater mussel propagation since they are a potential host for at least one federally endangered mussel.
Warpaint shiners are potential hosts for Tennessee heelsplitters (Lasmigona holstonia), a federally endangered species of freshwater mussel (Steg, 1998). They also play roles as both a predator to aquatic and terrestrial insects and as prey to both the largemouth and smallmouth bass. Little is known about other roles warpaint shiners may play in their ecosystem.
Commensal/Parasitic Species:
Warpaint shiners use their large terminal mouths to obtain their food in the current or at the surface (Outten, 1957). They face the current and move slowly, both horizontally and vertically, while taking food (Outten, 1957). Individuals may leap from the water when feeding (Jenkins and Burkhead, 1993).
The diet of warpaint shiners consists mainly of members of the insect order Ephemeroptera in the spring, though there is a reduction in feeding during spawning (Outten, 1957). Terrestrial adults of the insect orders Hymenoptera and Coleoptera dominate both the summer and fall diets (Outten, 1957).
Animal Foods: insects; terrestrial non-insect arthropods; aquatic or marine worms
Primary Diet: carnivore (Insectivore )
The range of warpaint shiners (Luxilus coccogenis) extends north into southwestern Virgina and east Tennessee, west to south-central Tennesse, south into north Alabama, north Georgia, and the tip of South Carolina and east into western North Carolina (Etnier and Starnes, 1993). Warpaint shiners are native only to the Tennessee River drainage (Jenkins and Burkhead, 1993) but human related activities have led to their introduction into the Upper Savannah, the Santee, and the New River drainages (Etnier and Starnes, 1993).
Biogeographic Regions: nearctic (Native )
Warpaint shiners inhabit moderate to high gradient creeks, streams, and rivers with cool, clear water (Outten, 1957). They avoid very rapid flows and are commonly found in large pools and on the edges of riffles (Outten, 1957).
Habitat Regions: temperate ; freshwater
Aquatic Biomes: rivers and streams
Warpaint shiners can live a maximum of four years, with most individuals reaching only age three in the wild (Outten, 1957).
Range lifespan
Status: wild: 4 (high) years.
Typical lifespan
Status: wild: 3 (high) years.
Average lifespan
Status: captivity: 5 years.
Warpaint shiners are easily recognized by the presence of their warpaint-like coloration (Jenkins and Burkhead, 1993). Both male and female adults and large juveniles exhibit a prominent orangish-red bar on the anterior opercle, and orangish-red areas on the dorsal fin base and on the snout (Etnier and Starnes, 1993). A dark bar is also present behind the operculum and black bands are present on both the caudal and dorsal fins (Jenkins and Burkhead, 1993). Nuptial males display more pronounced orange and black markings and have well developed breeding tubercles located on the chin and snout (Outten, 1957). Smaller tubercles are located on the dorsal, pectoral, pelvic, and anal fins. The epidermal coating on the scales of nuptial males is also considerably thicker than those on the female (Outten, 1957).
Adult warpaint shiners range in size from 65 to 95 mm in standard length (Jenkins and Burkhead, 1993) and males are generally larger than females (Outten, 1957). The majority of the elongate, moderately compressed body of warpaint shiners is mostly silver except for the dorsal area, which is olive-gray (Jenkins and Burkhead, 1993). The terminal mouth is large and oblique with the tip of the upper jaw sometimes extending further than the lower jaw. The origin of the dorsal fin is located well above the pelvic fin base and the cycloid scales of the anteriolateral region are taller than they are wide (Jenkins and Burkhead, 1993).
Warpaint shiners have 39 to 44 lateral line scales and 17 to 18 predorsal scale rows. There are 9 rays on the anal fin and 8 on the pectoral fin. The gill rakers are about as long as they are wide, and number from 5 to 8. Warpaint shiners have a pharyngeal tooth formula of 2,4-4,2 and have 40 to 42 vertebrate (Etnier and Starnes, 1993).
Juvenile warpaint shiners can be easily confused with juvenile striped shiners (Luxilus chrysocephalus) and whitetail shiners (Cyprinella galactura). Striped shiners differ from warpaint shiners in that they have very small mouths and no jaw tubercles (Etnier and Starnes, 1993). Whitetail shiners differ from the warpaint shiners in that they exhibit outlines on their scales and have a dorsal black bar running through the middle of their dorsal fin (Etnier and Starnes, 1993).
Range length: 65 to 95 mm.
Other Physical Features: ectothermic ; heterothermic ; bilateral symmetry
Sexual Dimorphism: male larger; male more colorful
Both Micropterus salmoides (largemouth bass) and Micropterus dolomieu (smallmouth bass) are predators of warpaint shiners (Outten, 1957).
Known Predators:
Both male and female warpaint shiners reach sexual maturity at the age of two years and spawn for the first time during their third summer. They are nest parasites, spawning on the margins of nests built by river chub (Nocomis micropogon) (Outten, 1957).
Mating System: polygynandrous (promiscuous)
Active spawning takes place in the months of May and June (Jenkins and Burkhead, 1993; Outten, 1957). Spawning activities begin when males, either in groups of eight to ten (Outten, 1957) or singly (Jenkins and Burkhead, 1993) hold positions over the nests of river chub. In the case of groups, the largest male will hold the foremost position over the nest (Outten, 1957). The foremost male drives away any other male attempting to assume a spawning position. Actual spawning occurs when the male is positioned upstream and the female approaches from the rear and to the side of the male (Outten, 1957). The pair then settle down together in a crevice where both the eggs and the sperm are released. When males are grouped, other males crowd around the pair in an attempt to fertilize some of the eggs (Outten, 1957).
Breeding interval: Warpaint shiners spawn only once a year (Outten, 1957).
Breeding season: Warpaint shiners spawn from May to June (Outten, 1957).
Range number of offspring: 300 to 1600.
Average number of offspring: 750.
Range age at sexual or reproductive maturity (female): 2 to 4 years.
Average age at sexual or reproductive maturity (female): 2 years.
Range age at sexual or reproductive maturity (male): 2 to 4 years.
Average age at sexual or reproductive maturity (male): 2 years.
Key Reproductive Features: seasonal breeding ; fertilization (External ); oviparous
Average number of offspring: 525.
Neither male nor female warpaint shiners show any parental involvement after spawning has taken place (Outten, 1957).
Parental Investment: no parental involvement
