Greenthroat darter

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Greenthroat darter
Greenthroat darter .jpg
from the Comal River, Texas
Scientific classification OOjs UI icon edit-ltr.svg
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Actinopterygii
Order: Perciformes
Family: Percidae
Genus: Etheostoma
Species:
E. lepidum
Binomial name
Etheostoma lepidum
Baird & Girard, 1853

The greenthroat darter (Etheostoma lepidum) is a species of freshwater ray-finned fish, a darter from the subfamily Etheostomatinae, part of the family Percidae, which also contains the perches, ruffes and pikeperches. It is found in Colorado, Guadalupe and Nueces River drainages in Texas; and in Pecos River system in New Mexico. [2]

Contents

Habitat Associations

Macrohabitat: Basically a spring-run species. [3] Mesohabitat: Scarce or absent from very eurythermal locations. [3] Occurs in a variety of non-turbid stream habitats with substrates from bedrock to silt covered (Platania 1980). A typical riffle species occurring over gravel and rubble, especially when aquatic vegetation is present. It also lives in spring areas, sometimes in cool vegetated pools. [4] Largest populations occur in vegetated rocky riffles. [5] [6] [7] [8] Species benthic after hatching. [6] [9]

Biology

Spawning season

October or November through May, with populations in stenothermal environments having a longer spawning season than those in more eurythermal environments. [6] [3] In the Colorado River, Texas, spawning occurs November – May; [10] in the South Concho River, Texas, spawning occurs October – May. [11] Hubbs (1985) [3] reported marked drop in reproductive activity when water temperature was raised from 20 to 23 °C.

Spawning habitat

Eggs laid on vegetation, [12] or on the underside of rocks. [6]

Fecundity

In the South Concho River, TX, eggs averaged 1.3 mm in diameter, and increased in number with female size; average number of eggs in females examined was 74, with a range of about 15–200. [11] In aquaria, spawning was observed at approximately 15–25 °C; over a 63-day period, a pair of Etheostoma lepidum laid 13 batches of eggs; numbers of eggs laid ranged from 47 to 109, totaling 1,115. [12] Optimal temperature for egg production apparently 20–23 °C; a female held at this temperature range was observed to produce eggs, in the laboratory environment, over a period of at least 251 days. [6] Egg incubation success is low above 24 degrees C. [13] At 28 degrees C, eggs hatch in 4–5 days, and hatch in about 40 days at 9 °C. Hubbs (1985) [3] noted that no difference in egg production could be correlated with daylength.

Related Research Articles

<i>Etheostoma</i> Genus of fishes

Etheostoma is a genus of small freshwater fish in the family Percidae native to North America. Most are restricted to the United States, but species are also found in Canada and Mexico. They are commonly known as darters, although the term "darter" is shared by several other genera. Many can produce alarm pheromones that serve to warn nearby fish in case of an attack.

<span class="mw-page-title-main">Rainbow darter</span> Species of fish

The rainbow darter is a small species of freshwater ray-finned fish, a darter from the subfamily Etheostomatinae, part of the family Percidae, which also contains the perches, ruffes and pikeperches. It is native to North America where it is found in small, fast-moving streams and small to medium-sized rivers. It grows to 2 to 3 inches in length. The species is very sensitive to pollution and silt, staying in clean, pollution-free water. The rainbow darter is easily identified by three dark spots on the back, and blue and orange in the dorsal and anal fins.

The Conchos darter is a species of freshwater ray-finned fish, a darter from the subfamily Etheostomatinae, part of the family Percidae, which also contains the perches, ruffes and pikeperches. It is endemic to the Conchos River system in northern Mexico, where it is known as dardo de conchos. This species can reach a length of 5.5 cm (2.2 in). It occurs in clear water in areas of shallow, rocky riffles and pools where the bed consists of gravel, sand and silt. It can be found as deep as 1 metre (3.3 ft) where the current may vary from slight to strong. The Conchos darter feeds on the bottom of the streams it occurs in on aquatic insect larvae. It is thought that it spawns from late February until June, and it is able to survive water temperatures as high as 30 °C (86 °F) during the summer. The Conchos darter was first formally described in 1889 by the American ichthyologist David Starr Jordan (1851-1931) with the type locality given as the Río Chihuahua in Mexico.

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<span class="mw-page-title-main">Blenny darter</span> Species of fish

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<span class="mw-page-title-main">Red shiner</span> Species of fish

The red shiner or red-horse minnow is a North American species of freshwater fish in the family Cyprinidae. They are deep-bodied and laterally compressed, and can grow to about three inches in length. For most of the year, both males and females have silver sides and whitish abdomens. Males in breeding coloration, though, have iridescent pink-purple-blue sides and a red crown and fins.

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The orangefin darter is a species of freshwater ray-finned fish, a darter from the subfamily Etheostomatinae, part of the family Percidae, which also contains the perches, ruffes and pikeperches. It is found in Barren River and Green River systems in Tennessee and Kentucky.

<span class="mw-page-title-main">Bluebreast darter</span> Species of fish

The bluebreast darter is a small species of freshwater ray-finned fish, a darter from the subfamily Etheostomatinae, part of the family Percidae, which also contains the perches, ruffes and pikeperches. It is endemic to the eastern United States from New York and Illinois to Tennessee and North Carolina.

<span class="mw-page-title-main">Greenfin darter</span> Species of fish

The greenfin darter is a species of freshwater ray-finned fish, a darter from the subfamily Etheostomatinae, part of the family Percidae, which also contains the perches, ruffes and pikeperches. It is endemic to the eastern United States.

The stone darter is a species of freshwater ray-finned fish, a darter from the subfamily Etheostomatinae, part of the family Percidae, which also contains the perches, ruffes and pikeperches. It is endemic to the eastern United States.

<span class="mw-page-title-main">Blueside darter</span> Species of fish

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The stripetail darter is a species of freshwater ray-finned fish, a darter from the subfamily Etheostomatinae, part of the family Percidae, which also contains the perches, ruffes and pikeperches. It is endemic to the eastern United States. It is found in small rivers and streams in the states of Tennessee, Ohio, Kentucky, Illinois, Alabama, Georgia, and Mississippi. Males are a golden-orange color with black barring on the fins, and grow to a length of about 2.8 in (7 cm). This fish feeds on midge larvae and other small invertebrates. It breeds in the spring; eggs are attached to the substrate, often under slab rocks, where they are guarded by the male. The population trend of this fish seems to be stable and it is a common species with numerous sub-populations over a wide range, and the International Union for Conservation of Nature has assessed its conservation status as being of "least concern".

The goldstripe darter is a species of freshwater ray-finned fish, a darter from the subfamily Etheostomatinae, part of the family Percidae, which also contains the perches, ruffes and pikeperches. 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".

The cypress darter is a species of freshwater ray-finned fish, a darter from the subfamily Etheostomatinae, part of the family Percidae, which also contains the perches, ruffes and pikeperches. It is endemic to fresh waters of the central and eastern United States. Its range includes drainages from the Choctawhatchee River, Florida, to the San Jacinto River, Texas, as well as the Mississippi River basin from southern Illinois and eastern Oklahoma to the Gulf of Mexico. It inhabits vegetated margins of swamps and lakes, and backwater habitats during the summer, while in winter it moves to flooded riffles and backwater bayous. It feeds mostly on small crustaceans, as well as insects and their larvae. Spawning takes place during spring and summer, with clusters of up to three eggs being laid, often stuck to the surface of dead leaves. The cypress darter has a very wide range and its population trend seems to be stable. It is a common species with numerous sub-populations, and the International Union for Conservation of Nature has assessed its conservation status as being of "least concern".

<span class="mw-page-title-main">Orangethroat darter</span> Species of fish

The orangethroat darter is a species of freshwater ray-finned fish, a darter from the subfamily Etheostomatinae, part of the family Percidae, which also contains the perches, ruffes and pikeperches. It is endemic to the central and eastern United States where it is native to parts of the Mississippi River Basin and Lake Erie Basin. Its typical habitat includes shallow gravel riffles in cooler streams and rocky runs and pools in headwaters, creeks, and small rivers, with sand, gravel, rubble, or rock substrates. It forages on the bottom for the aquatic larvae of midges, blackfly, mayfly and caddisfly, as well as isopods and amphipods. Spawning takes place in spring, the selected sites often being the upper stretches of riffles with sandy and gravelly bottoms interspersed with larger cobble. Reproductive success is high in this species. No particular threats have been identified, and the International Union for Conservation of Nature has assessed its conservation status as being of "least concern".

The Tippecanoe darter is a species of freshwater ray-finned fish, a darter from the subfamily Etheostomatinae, part of the family Percidae, which also contains the perches, ruffes and pikeperches. It is endemic to the eastern United States.

The wounded darter is a species of freshwater ray-finned fish, a darter from the subfamily Etheostomatinae, part of the family Percidae, which also contains the perches, ruffes and pikeperches. It is endemic to the eastern United States. Its range includes the upper Tennessee River drainage, western Virginia, western North Carolina, and eastern Tennessee. Its typical habitat is among boulders or coarse rubble and cobble, often with overhanging ledges, in medium to large slow-moving rivers. It feeds on small insect larvae, especially midge larvae. Spawning occurs when the water warms up in late spring. Females deposit clutches of adhesive eggs on the underside of rock ledges or slabs, and the male guards the nest. The population trend of this fish seems to be decreasing slowly but it is a relatively common species with numerous sub-populations, and the International Union for Conservation of Nature has assessed its conservation status as being of "least concern". The greatest threat comes from impoundment, and a management plan is in place, including captive breeding.

<i>Etheostoma zonale</i> Species of fish

Etheostoma zonale, the banded darter, is a species of freshwater ray-finned fish, a darter from the subfamily Etheostomatinae, part of the family Percidae, which also contains the perches, ruffes and pikeperches. It is endemic to the eastern United States. It is mainly found in the Mississippi Basin, ranging from the Verdigris River in Kansas eastward to the Allegheny River in New York, and from the Minnesota River in Minnesota southward to the Ouachita River in Arkansas and the Tennessee River in Alabama. Its typical habitat in small and medium-sized rivers is riffles over cobble or gravel, rock slabs, and small boulders. It feeds on the riverbed on small insect larvae and is itself eaten by birds and larger fish. Males become more colorful and become territorial before spawning which takes place in spring. The females attach the eggs to waterweed. The population trend of this fish seems to be stable, it is a common species with numerous sub-populations over a wide range, no major threats have been identified and the International Union for Conservation of Nature has assessed its conservation status as being of "least concern".

<span class="mw-page-title-main">Gilt darter</span> Species of fish

The gilt darter is a species of freshwater ray-finned fish, a darter from the subfamily Etheostomatinae, part of the family Percidae, which also contains the perches, ruffes and pikeperches. It can be found in a number of states in the Mississippi River drainage of the United States although it has been extirpated from some river systems in which it was at one time present, mostly due to siltation and pollution problems. Males are more colorful than females and can grow to a length of about 9 cm (3.5 in). It is a benthic fish that feeds primarily on small aquatic insect larvae. Males form territories during the breeding season in late spring and early summer. Spawning typically takes place at the upper ends of riffles with sandy and gravelly bottoms interspersed with larger cobbles. Some organisations are endeavouring to conserve populations of the gilt darter and re-introduce it to states where the fish has been extirpated but suitable habitat still exists.

References

  1. NatureServe (2014). "Etheostoma lepidum". IUCN Red List of Threatened Species . 2014: e.T202500A2745352. doi: 10.2305/IUCN.UK.2014-3.RLTS.T202500A2745352.en . Retrieved 19 November 2021.
  2. "Etheostoma lepidum, Greenthroat darter".
  3. 1 2 3 4 5 Hubbs, C. 1985. Darter reproductive seasons. Copeia 1985(1):56-68.
  4. Kuehne, R.A., and R.W. Barbour. 1983. The American Darters. The University Press of Kentucky. Lexington. 177 pp.
  5. Strawn, K. 1955. A method of breeding and raising three Texas darters. Part I. Aquarium Journal 26:408-41
  6. 1 2 3 4 5 Hubbs, C., and K. Strawn. 1957. The effects of light and temperature on the fecundity of the greenthroat darter, Etheostoma lepidum. Ecology 38:596-602.
  7. Hubbs, C., R.A. Kuehne, and J.C. Ball. 1953. The fishes of the upper Guadalupe River. Texas Journal of Science 5(2):216-244.
  8. Hubbs, C., and A.A. Echelle. 1972. Endangered non-game fishes of the upper Rio Grande basin pp. 147–167. In: Rare and endangered wildlife of Southwestern United States. New Mexico Game and Fish Dept., Santa Fe.
  9. Paine, M.D. 1984. Ecological and evolutionary consequences of early ontogenies of darter (Etheostomatini). pp. 21–30. In: Lindquist, D.G., and L.M. Page (eds.), Environmental Biology of Darters. Dr W Junk Publishers, The Hague.
  10. Developmental temperature tolerance of four etheostomatine fishes occurring in Texas. Copeia 1961:195-198.
  11. 1 2 Hubbs, C., M.M. Stevenson, and A.E. Peden. 1968. Fecundity and egg size in two central Texas darter populations. Southwestern Naturalist 13:301-323
  12. 1 2 Strawn, K. 1956. A method of breeding and raising three Texas darters. Part II. Aquarium Journal 27(1):11-32.
  13. Hubbs, C., A.E. Peden, and M.M. Stevenson. 1969. The developmental rate of the greenthroat darter, Etheostoma lepidum. Amer. Midl. Nat. 81:182-188.