Overview

Comprehensive Description

Biology

Most common in sandy pools and runs of small to medium rivers. Also occurs in creeks and rocky pools and runs (Ref. 5723, 10294). Adult feeds on surface insects (Ref. 10294).
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Distribution

endemic to a single nation

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National Distribution

United States

Origin: Native

Regularity: Regularly occurring

Currently: Present

Confidence: Confident

Type of Residency: Year-round

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Global Range: (200,000-2,500,000 square km (about 80,000-1,000,000 square miles)) The range extends from the Rio Grande basin, Texas, to the Suwannee River drainage, Florida and Georgia, and extends north in the Mississippi River basin to southern Oklahoma, southeastern Missouri, southern Illinois, and western and southern Tennessee; introduced in the Sac River (Missouri River drainage), Missouri (Lee et al. 1980, Page and Burr 2011).

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Range Description

The range extends from the Rio Grande basin, Texas, to the Suwannee River drainage, Florida and Georgia, and extends north in the Mississippi River basin to southern Oklahoma, southeastern Missouri, southern Illinois, and western and southern Tennessee; introduced in the Sac River (Missouri River drainage), Missouri (Lee et al. 1980, Page and Burr 2011).
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Eastern U.S.A. to northern Mexico.
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North America: Gulf drainages from Suwannee River in Georgia and Florida to Rio Grande in Texas, USA; Mississippi River basin (mostly on Former Mississippi Embayment) from southern Illinois to Louisiana and west in Red River drainage to western Oklahoma, USA.
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Physical Description

Size

Length: 15 cm

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Maximum size: 190 mm TL
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Max. size

19.0 cm TL (male/unsexed; (Ref. 5723))
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Type Information

Lectotype for Cliola urostigma
Catalog Number: USNM 20446
Collection: Smithsonian Institution, National Museum of Natural History, Department of Vertebrate Zoology, Division of Fishes
Preparation: Photograph
Collector(s): W. Anderson
Locality: Ft. McKavit [sic], Texas., Menard County, Texas, United States, North America
  • Lectotype: Gibbs, R. H. 1957. Tulane Studies in Zoology. 5 (8): 181.
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Paratype for Cliola urostigma
Catalog Number: USNM 163952
Collection: Smithsonian Institution, National Museum of Natural History, Department of Vertebrate Zoology, Division of Fishes
Collector(s): W. Anderson
Locality: Ft. McKavit [sic], Texas., Menard County, Texas, United States, North America
  • Paratype: Gibbs, R. H. 1957. Tulane Studies in Zoology. 5 (8): 181.
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Paratype for Cliola urostigma
Catalog Number: USNM 17812
Collection: Smithsonian Institution, National Museum of Natural History, Department of Vertebrate Zoology, Division of Fishes
Collector(s): Kumlien & Earll
Year Collected: 1876
Locality: Clear Creek, Waller, Co., Texas, Waller County, Texas, United States, North America
  • Paratype: Gibbs, R. H. 1957. Tulane Studies in Zoology. 5 (8): 181.
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Ecology

Habitat

Habitat Type: Freshwater

Comments: This fish is most common in pools and runs of clear, sandy-bottomed, small to medium rivers, typically in areas with sparse vegetation and strong current, but upland populations occur in creeks over substrates with more gravel and rubble (Lee et al. 1980, Page and Burr 2011). Populations in the western part of the range are often in turbid water. Eggs are deposited in crevices.

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Habitat and Ecology

Habitat and Ecology
This fish is most common in pools and runs of clear, sandy-bottomed, small to medium rivers, typically in areas with sparse vegetation and strong current, but upland populations occur in creeks over substrates with more gravel and rubble (Lee et al. 1980, Page and Burr 2011). Populations in the western part of the range are often in turbid water. Eggs are deposited in crevices.

Systems
  • Freshwater
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Environment

benthopelagic; freshwater
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Depth range based on 8 specimens in 1 taxon.

Environmental ranges
  Depth range (m): 0.25 - 1.255

Graphical representation

Depth range (m): 0.25 - 1.255
 
Note: this information has not been validated. Check this *note*. Your feedback is most welcome.

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Migration

Non-Migrant: No. All populations of this species make significant seasonal migrations.

Locally Migrant: No. No populations of this species make local extended movements (generally less than 200 km) at particular times of the year (e.g., to breeding or wintering grounds, to hibernation sites).

Locally Migrant: No. No populations of this species make annual migrations of over 200 km.

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Trophic Strategy

Most common in sandy pools and runs of small to medium rivers. Also occurs in creeks and rocky pools and runs (Ref. 5723, 10294). Adult feeds on surface insects (Ref. 10294).
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Population Biology

Number of Occurrences

Note: For many non-migratory species, occurrences are roughly equivalent to populations.

Estimated Number of Occurrences: 81 to >300

Comments: This species is represented by a very large number of occurrences (subpopulations) (e.g., see map in Lee et al. 1980). It is one of the most ubiquitous minnows in Alabama (Boschung and Mayden 2004).

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Global Abundance

100,000 to >1,000,000 individuals

Comments: Adult population size is unknown but certainly exceeds 100,000 and presumably exceeds 1,000,000. This is one of the most abundant minnows in Alabama (Boschung and Mayden 2004), Louisiana, and Texas (Lee et al. 1980).

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Life History and Behavior

Reproduction

In southeastern Mississippi, spawns late March-early October (mainly April-August) at 19-29 C (Heins and Dorsett 1986). Spawns June-August in Missouri. Males defend spawning territories. Produces sounds used in species recognition.

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Conservation

Conservation Status

National NatureServe Conservation Status

United States

Rounded National Status Rank: N5 - Secure

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NatureServe Conservation Status

Rounded Global Status Rank: G5 - Secure

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IUCN Red List Assessment


Red List Category
LC
Least Concern

Red List Criteria

Version
3.1

Year Assessed
2013

Assessor/s
NatureServe

Reviewer/s
Smith, K. & Darwall, W.R.T.

Contributor/s

Justification
Listed as Least Concern in view of the large extent of occurrence, large number of subpopulations, large population size, apparently stable trend, and lack of major threats.

History
  • 2010
    Least Concern
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Global Short Term Trend: Relatively stable (=10% change)

Comments: Extent of occurrence, area of occupancy, number of subpopulations, and population size probably are relatively stable or declining at a rate of less than 10% over 10 years or three generations.

Global Long Term Trend: Increase of 10-25% to decline of 30%

Comments: In Louisiana, after the 1960s and early 1970s, blacktail shiners disappeared from several locations and abundance declined in other sites coincident with a range expansion and abundance increase in Cyprinella lutrensis (Douglas and Jordan 2002).

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Population

Population
This species is represented by a very large number of occurrences (subpopulations) (e.g., see map in Lee et al. 1980). It is one of the most ubiquitous minnows in Alabama (Boschung and Mayden 2004).

Adult population size is unknown but certainly exceeds 100,000 and presumably exceeds 1,000,000. This is one of the most abundant minnows in Alabama (Boschung and Mayden 2004), Louisiana, and Texas (Lee et al. 1980).

In Louisiana, after the 1960s and early 1970s, blacktail shiners disappeared from several locations and abundance declined in other sites coincident with a range expansion and abundance increase in Cyprinella lutrensis (Douglas and Jordan 2002).

Extent of occurrence, area of occupancy, number of subpopulations, and population size probably are relatively stable or declining at a rate of less than 10% over 10 years or three generations.

Population Trend
Stable
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Threats

Degree of Threat: Medium

Comments: Overall, this species faces no major threats. In Louisiana, habitat changes associated with flood control projects (e.g., channelization) apparently led to increases in C. lutrensis populations and declines and extirpations of C. venusta populations (Douglas and Jordan 2002).

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Major Threats
Overall, this species faces no major threats. In Louisiana, habitat changes associated with flood control projects (e.g., channelization) apparently led to increases in C. lutrensis populations and declines and extirpations of C. venusta populations (Douglas and Jordan 2002).
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Least Concern (LC)
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Management

Conservation Actions

Conservation Actions
Currently, this species is of relatively low conservation concern and does not require significant additional protection or major management, monitoring, or research action.
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Wikipedia

Blacktail shiner

The blacktail shiner (Cyprinella venusta) is a small freshwater fish in the Cyprinidae family native to the United States.

Description and anatomy[edit]

The blacktail shiner is a somewhat slender minnow with 8-9 rays on the anal fin, and a prominent black spot at the base of the caudal fin (tail fin).[1] The back is usually yellowish-olive, and the sides are silvery with hints of blue. Adults usually reach 4 inches (100 mm) in length. The blacktail shiner has a large, black caudal spot which distinguishes it from most other minnows. The caudal spot of the blacktail shiner may be faint, especially in populations inhabiting turbid waters, and they could likely be confused with the red shiner (C. lutrensis); however, the red shiner has 9 anal rays (versus 8) and usually 35 or fewer lateral scales (versus 36 or more).

Geographic distribution[edit]

The blacktail shiner occurs in Gulf of Mexico drainages from Suwannee River, Georgia and Florida, to Rio Grande, Texas; Mississippi River basin (mostly on Former Mississippi Embayment) from southern Illinois to Louisiana and west in Red River drainage to western Oklahoma.[2]

Blacktail shiners are found in the southern United States west of the Appalachian Mountains.[3] The species ranges east and west from north central Florida to West Texas, and north to southern Illinois. In Texas, blacktail shiners are unknown in the Panhandle, being found primarily from the Edwards Plateau eastward.

The blacktail shiner has also been found from the Rio Grande basin in Texas, east to the Suwannee River, and north through the Mississippi River basin to the confluence of the Ohio River. Two of the three recognized subspecies occur in Alabama.[4] The slender blacktail shiner, C. v. stigmaturus, is found in the upper Mobile River basin (most frequently above the Fall Line), while the eastern blacktail shiner, C. v. cercositgma, occurs in the lower Mobile River basin and coastal rivers draining the state. Intergradations between these subspecies have been recognized in the Alabama, Cahaba, and Tallapoosa river systems.[5]

Ecology and habitat[edit]

The blacktail shiner feeds primarily on invertebrates. Its diet includes algae, seeds, and aquatic and terrestrial insects. Aquatic insects and algae were the most common food items of blacktail shiners in the Blanco River, Texas; sediment and detritus were found in 21% of the 36 guts examined.[6] Blacktail shiners feed primarily during the day. Blacktail shiners may serve as major food resource for piscivorous spotted bass (Micropterus punctulatus) during the summer in Village Creek (Neches River), Texas.[7]

The blacktail shiner is most common in pools and runs of clear, sandy-bottomed, small to medium rivers, typically in areas with sparse vegetation and strong current, but upland populations occur in creeks over substrates with more gravel and rubble.[8][2] Populations in the western part of the species' range are often found in turbid water. Blacktail shiner mesohabitat is ubiquitously distributed among pools, runs, and riffles with silt, gravel, and bedrock substrates. In the Blanco River, Texas, blacktail shiners were most abundant in swift runs in the spring and summer.[6] The species occurred throughout the year in riffle and sandbank habitats in Village Creek (Neches River), Texas. During summer, most individuals were collected from sandbank habitats; they were also found in deep channel and riffle habitats, though no blacktail shiners longer than 47 millimeters (1.9 in) occurred in riffles. Individuals smaller than 17 millimeters (0.67 in) were found predominately in riffle habitats during fall and winter. Juveniles occurred almost exclusively in sandbank mesohabitat during spring.[7] Blacktail shiners are commonly found in sandy or rocky areas of Lake Texoma (Oklahoma/Texas), generally in clearer water of the downstream area; they are occasionally abundant in the tailwaters, and rarely found in the headwaters.

The blacktail shiner hybridizes with the red shiner (C. lutrensis) in Texas[9] and in Illinois.[10]

Life history[edit]

The lifespan of the blacktail shiner is up to 4 years in the Leaf River system, Mississippi and up to 5 years in the Blanco River, Texas.[6]

In Texas, the blacktail shiner spawning season is April through September.[6] In Mississippi, it is late March through early October, with most females reproductive from April to early September.[11][12] In Village Creek, Texas, blacktail shiners revealed size distribution patterns consistent with a protracted spawning season.[7]

Prime spawning habitat for the blacktail shiner is in fractional crevices; generally located in flowing water, preferring crevices in current velocities of 0.30 meters per second (0.98 ft/s).[13] Populations in reservoirs chose crevice sites in locations of much lower current speeds.[13] In the Blanco River, Texas, blacktail shiners were observed depositing eggs underneath small boulders and large cobble in a bedrock riffle in the swiftest current velocities available. Males respond to sounds produced by spawning females and are able to distinguish these sounds from those produced by related female red shiners. Males are territorial, defending a crevice from other males. Breeding pair swims along the crevice, the female deposits eggs; usually the sperm has already been released into the crevice, so the eggs are deposited into a crevice with viable sperm. Immediately after spawning, the male doubles back and eats any eggs that failed to make it into the crevice. Small males (sneakers) try to fertilize eggs by darting between the dominant male and spawning female. Both large and small males will enter another male's territory and deposit sperm in a crevice before the male courts a female to lay eggs in the crevice.[11]

One study in the Blanco River, Texas found that female blacktail shiners had up to 340 ova.[6] Another study in southwestern Mississippi found that clutch sizes ranged between 139 and 459 ova in females 48.6–72.0 millimeters (1.91–2.83 in); average mature ovum diameter was 1.15 millimeters (0.045 in); ovaries in mature females constituted 5.8-19.1% of the somatic body weight.[11] Females from the Pearl River, Mississippi, spawned 20-46 clutches during the reproductive season.[13] The size of sexual maturation is between 32 millimeters (1.3 in) and 42 millimeters (1.7 in).[11]

In the Leaf River system, Mississippi, average length was 24 millimeters (0.94 in) for age 1, 46 millimeters (1.8 in) for age 2, and 72 millimeters (2.8 in) for age 3; populations consisted mainly of age classes 0 and I[13] In the first year, blacktail shiners reach about 45 to 60 millimeters (1.8 to 2.4 in).[13] Average length was 45 millimeters (1.8 in) for age 0, 66 millimeters (2.6 in) for age 1, 90 millimeters (3.5 in) for age 3 and older in the Blanco River, Texas.[6]

Management[edit]

The blacktail shiner is of relatively low conservation concern.[14] Their populations are stable, but some issues of concern include habitat changes associated with flood control projects, siltation from development sites, deterioration of water quality, and recent water drawdown for mining and irrigation.[15][16] Activities such as construction and operation of hydroelectric facilities, flood control, additional irrigation diversions, bank stabilization, oil and gas drilling, mining, grazing, stocking or introduction of nonnative fishes may jeopardize the continued existence of the blacktail shiner.[citation needed] Another potential impact on the population could be hybridization.[9][10]

References[edit]

  1. ^ http://www.fishbase.org/summary/Cyprinella-cercostigma.html
  2. ^ a b Page, L.M. and Burr, B.M. 2011. Peterson field guide to freshwater fishes of North America north of Mexico. Houghton Mifflin Harcourt, Boston, Massachusetts.
  3. ^ http://www.txstate.fishesoftexas.org/cyprinella%20venusta.htm
  4. ^ Gibbs, R.H., Jr. 1957. Cyprinid fishes of the subgenus Cyprinella of Notropis III variation and subspecies of Notropis venusta (Girard). Tulane Stud. Zool. 5:175-203.
  5. ^ http://nas.er.usgs.gov/queries/factsheet.aspx?SpeciesID=521
  6. ^ a b c d e f Littrell, B.M. 2006. Can Invasiveness of Native Cyprinids Be Predicted From Life History Traits? A Comparison Between a Native Invader and a Regionally Endemic Cyprinid and Status of an Introgresses Guadalupe Bass Population in a Central Texas Stream. Master of Science Thesis, Texas State University-San Marcos.61 pp.[unreliable source?]
  7. ^ a b c Moriarty, L.J., and K.O. Winemiller. 1997. Spatial and temporal variation in fish assemblage structure in Village Creek, Hardin County, Texas. Texas Journal of Science 49(3):85-110.
  8. ^ Lee, D.S., Gilbert, C.R., Hocutt, C.H., Jenkins, R.E., McAllister, D.E. and Stauffer, J.R. Jr. 1980. Atlas of North American freshwater fishes. North Carolina State Museum of Natural History, Raleigh, North Carolina.
  9. ^ a b Hubbs, C., and K. Strawn. 1956. Infertility between two sympatric fishes, Notropis lutrensis and Notropis venustus. Evolution 10(4):341-344.
  10. ^ a b Smith, P.W. 1979. The Fishes of Illinois. University of Illinois Press, Urbana. 314 pp.
  11. ^ a b c d Heins, D.C. and Dorsett, D.R. 1986. Reproductive traits of the blacktail shiner, NOTROPIS VENUSTUS (Girard) in southern Mississippi. Southwest Naturalist 31: 185-189.
  12. ^ Heins, D.C. 1990. Mating behaviors of the blacktail shiner, Cyprinella venusta, from southeastern Mississippi. Proc. S.E. Fishes Council 21:5-7.
  13. ^ a b c d e Baker, J.A., K.J. Kilgore, and S.A. Foster. 1994. Populations variation in spawning current speed selection in the blacktail shiner, Cyprinella venusta (Pisces: Cyprinidae). Env. Biol. Fish. 39:357-364.
  14. ^ http://www.iucnredlist.org/details/184097/0
  15. ^ Walser, C.A. and H.L. BART. 1999. Influence of agriculture on in-stream habitat and fish community structure in Piedmont watersheds of the Chattahoochee River system. Ecol. Fresh. Fish 8:237-246.
  16. ^ Johnston, C.E. and T.M. Farmer. 2004. Status of fish species of high conservation concern in the Uchee Creek system (Chattahoochee River 39 drainage), Alabama. Alabama Department of Conservation and Natural Resources Report.
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Names and Taxonomy

Taxonomy

Comments: Kristmundsdottir and Gold (1996) used mtDNA restriction site analysis to study systematics and biogeography and identified four major mtDNA-based phylogeographic clades: Chocktawatchee, Apalachicola, Mobile, and Western (four lineages, Texas to Mississippi). They found that mtDNA phylogeographic subdivision within C. venusta is not strictly concordant with geographic subdivisions (ranges) of the three nominal subspecies (venusta, cercostigma, and stigmatura); taxonomic revision may be warranted, but further study is needed. This species was removed from genus Notropis and placed in genus (formerly subgenus) Cyprinella by Mayden (1989); this change was adopted in the 1991 AFS checklist (Robins et al. 1991). See Mayden (1989) for synonymy.

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