Goldstripe darter

Goldstripe darter
Scientific classification
Kingdom: Animalia
Phylum: Chordata
Class: Actinopterygii
Order: Perciformes
Family: Percidae
Genus: Etheostoma
Species: E. parvipinne
Binomial name
Etheostoma parvipinne
C. H. Gilbert & Swain, 1887

The goldstripe darter (Etheostoma parvipinne) is a species of ray-finned fish in the perch family. It is endemic to the southeastern United States where it is found in Gulf Slope streams from the Colorado River drainage in Texas to the Flint River in Georgia, the Atlantic Slope in Ocmulgee River system, Georgia, and the Mississippi embayment north as far as southeastern Missouri and western Kentucky. It is typically found in small springs, streams, and creeks with aquatic and marginal vegetation and detritus. The female spawns on multiple occasions between about mid-March and June, sticking the adhesive eggs to plants, gravel and the sides of rocks. The goldstripe darter is a common species with a wide range and numerous sub-populations, and the International Union for Conservation of Nature has assessed its conservation status as being of "least concern".

Distribution

The goldstripe darter inhabits the Gulf Coastal Plain, including parts of Alabama, Mississippi, Tennessee, Kentucky, Arkansas, Louisiana, and Oklahoma, and lower Mississippi drainages westward as far as the Brazos River Basin in Texas.[2] Most recently, goldstripe darters have been confirmed in these drainages:[3]

Other than occasional passing mention, little historical records exist of goldstripe darter distribution, making it difficult to determine in what ways, if any, the distribution has changed over time. Populations are currently believed to be stable.[3]

Ecology

Habitat

The goldstripe darter is typically found in small springs, streams, and creeks with vegetative cover, whether that be aquatic vegetation, algae beds, or detritus.[4][5][6] Preferred substrates include sand, small gravel, and rubble.[5] Goldstripe darters do not tend to be found in rivers or streams wider than 15 feet or those with large gravel or mud substrates.[6]

The goldstripe darter's preferred pH seems to be between 6.1 and 6.5.[6] However, a population has been found that can withstand pH as low as 2.9.[7] It prefers temperate climates, located between 38°N and 31°N in latitude.[8]

Feeding

The goldstripe darter feeds on midge larvae, dipteran pupae, caddisfly larvae, dytiscid beetle larvae, and small crayfish.[9]

Associated species

Fishes most often found with the goldstripe darter include:[6]

It is reasonable to believe some of these species, particularly those in the genus Etheostoma, may compete with the goldstripe darter for resources.

Lifecycle

At adulthood, goldstripe darters typically range from 35 to 55 mm in length.[10] Two of the largest goldstripe darters recorded were a female measuring 61.8 mm[6] and a male measuring 67 mm.[8]

Reproduction

Spawning likely occurs from mid-March through June.[10] During spawning, male body color changes from uniform olive-brown or olive-brown with darker blotches, to brown with black vertical bars. The black teardrop darkens and eye color becomes intensely red. Pelvic and anal fins darken from dusky to uniform black, and dorsal fin becomes intensely black.[11]

Males perform stationary, lateral displays with erect dorsal fins during aggressive encounters with other males, but no elaborate courting displays were observed between males and females. Males pursue females, waiting for them to spawn. Goldstripe darters mate with multiple partners during the breeding season and do not seem to give any parental care. Multiple spawnings occur each year.[11]

Goldstripe darter eggs are strongly adhesive and are attached singly to the spawning substrate. The eggs will be attached to plants, gravel, and occasionally on the sides of rocks. Goldstripe darters do not bury their eggs. Clutch size is roughly estimated at 66, and average egg size is roughly 0.86 mm in diameter.[11]

Management

Presently, the goldstripe darter is not considered endangered.[12] Populations are thought to be stable.[3] Thus, no current management programs are specifically designed for the goldstripe darter, though it does benefit from general riparian protection and buffers.[13]

Recommendations

Few data exist for the historical distribution of the goldstripe darter, so determining whether the goldstripe has lost any of its former range is difficult. To spot any declines in the species in the future, periodic assessments of abundances should be conducted in small streams throughout its range. Goldstripe darters are vulnerable to seining and electroshocking for sampling purposes.[13]

The goldstripe darter is likely to be vulnerable to sedimentation from logging, channelization, or agricultural runoff. Management plans designed to maintain and develop forested riparian zones adjacent to first-order streams would assist with its conservation.[14] Because goldstripe darter populations tend to be isolated from each other, recolonization would be difficult after a disturbance.[13]

References

  1. ↑ NatureServe (2013). "Etheostoma parvipinne". IUCN Red List of Threatened Species. Version 3.1 (3.1). International Union for Conservation of Nature. Retrieved November 22, 2013.
  2. ↑ Hubbs, C., R.J. Edwards, and G.P. Garrett. 1991. An annotated checklist of the freshwater fishes of Texas, with keys to identification of species. Texas Journal of Science, Supplement 43(4):1-56.
  3. 1 2 3 Warren, M.L., Jr., B.M. Burr, S.J. Walsh, H.L. Bart, Jr., R.C. Cashner, D.A. Etnier, B.J. Freeman, B.R. Kuhajda, R.L. Mayden, H.W. Robison, S.T. Ross, and W.C. Starnes. 2000. Diversity, Distribution, and Conservation status of the native freshwater fishes of the southern United States. Fisheries 25(10):7-29.
  4. ↑ Smith-Vaniz, W. F. 1968. Freshwater fishes of Alabama. Auburn Univ., Paragon Press, Montgomery, 211 pp.
  5. 1 2 Moore, G. A., and F. B. Cross. 1950. Additional Oklahoma fishes with validation of Poecilichthys parvipinnis (Gilbert and Swain). Copeia 1950: 139-148.
  6. 1 2 3 4 5 Robison, H. W. 1977. Distribution, habitat, variation and status of the goldstripe darter, Etheostoma parvipinne, in Arkansas. Southwestern Nat. 22(4):435-422.
  7. ↑ Robbins, Michael, Clark Rein, and Michael Volkin. 2003 The goldstripe darter and its tolerance to low pH in an east Texas pond. Texas Journal of Science, 55(1):86-89.
  8. 1 2 FishBase: Etheostoma Parvipinne. http://www.fishbase.org/summary/Etheostoma-parvipinne.html
  9. ↑ Etnier, D.A. and W.C. Starnes 1993 The fishes of Tennessee. The University of Tennessee Press, Knoxville, Tennessee, USA.
  10. 1 2 Alabama Department of Conservation and Natural Resources: Goldstripe Darter. http://www.dcnr.state.al.us/fishing/freshwater/fish/other/darters/goldstripe/
  11. 1 2 3 Johnston, Carol E. 1994. Spawning Behavior of the Goldstripe Darter (Etheostoma parvipinne Gilbert and Swain) (Percidae). Copeia, Vol. 1994, No. 3 (Aug. 17, 1994), pp. 823-825 Published by: American Society of Ichthyologists and Herpetologists. http://www.jstor.org/stable/1447204
  12. ↑ FWS Endangered Species List. http://www.fws.gov/endangered/
  13. 1 2 3 Georgia Department of Natural Resources: Etheostoma Parvipinne. http://www.georgiawildlife.com/node/2623
  14. ↑ Texas Freshwater Fishes: Etheostoma Parvipinne. http://www.bio.txstate.edu/~tbonner/txfishes/etheostoma%20parvipinne.htm
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