Percina phoxocephala

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Percina phoxocephala
Scientific classification Red Pencil Icon.png
Kingdom: Animalia
Phylum: Chordata
Class: Actinopterygii
Order: Perciformes
Family: Percidae
Genus: Percina
Species:
P. phoxocephala
Binomial name
Percina phoxocephala
(Nelson, 1876)
Synonyms [2]

Etheostoma phoxocephalumNelson, 1876

Percina phoxocephala, the slenderhead 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 North America in the central Ohio and Mississippi River basins, to northeastern South Dakota and the Lake Winnebago system in Wisconsin, and as far south as the Red River in eastern Oklahoma and northeast Texas, typically in small to medium size rivers. It is a colorful species, with an average length of 6 to 9 centimeters (2.4 to 3.5 in). Males take on a deeper hue during the breeding season. It feeds on insect larvae and other small invertebrates, and spawns between April and June. It is a common fish with a very wide range and the International Union for Conservation of Nature has classified its conservation status as being of "least concern".

Contents

Description

Slenderhead darters are typically 6-9 centimeters long, and can reach 10 centimeters at times. [3] They have a pointed snout and a long narrow body. Their mouths are subterminal with the snout projecting only slightly beyond the mouth. Teeth are present on the jaws but are minute. [3] The dorsal side of the body is light brown with 14-22 dark blotches down the center serving as camouflage to potential predators above the darter. The ventral side is cream colored which helps disguise the darter from potential predators below them. They have a row of 11-16 blotches down their sides that are taller than they are wide and connected by a thin lateral stripe. [4] The dorsal fins are distinctly separate with the first dorsal fin containing a dark brown band near the base and an orange band near the outer edge. The second dorsal fin and tail have many small spots often forming rows. [3] The pelvic fins are transparent and are located on the thoracic position and have two spines and 9-10 fin rays. [4] The caudal fin has a square shape and is slightly forked. On breeding males the orange band on the dorsal fin is more intensely colored and thicker. Males also can have a dark dusky coloration to their body which often hides many of the blotches on their back and sides. Slenderheads have small scales and a lateral-line count ranging from 60-80. The female breast is naked except for the presence of one or two cternoid scales, the posterior half of the males breast is scaled with the anterior half being naked. [4] Their conservation status is of least concern. [1]

Distribution and habitat

The slenderhead darter is a medium-sized darter and the most widely distributed of the four species assigned to the subgenus Swainia. It is found in North America from the central Ohio and Mississippi River basins, to northeastern South Dakota and the Lake Winnebago system (in Lake Michigan drainage) in Wisconsin, and as far south as the Red River in eastern Oklahoma and northeast Texas. [5] Slenderhead darters are found in areas of relatively shallow water with riffles and a moderate current. They prefer areas over sand and gravel bottoms with little silt. They are bottom dwellers and found in the Benthic zone. [6]

Reproduction

Slenderhead darters spawn between late April and early June. The darters exhibit sexual dimorphism with the males pigmentation darkening in April and peaking during spawning. The first dorsal fin becomes orange and the dorsal rays become outlined in yellow. Older and larger males are darker and able to attract more females. Males are territorial and guard patches of swift flowing water 15-60 centimeters deep. The females will lay their eggs in riffles burying them in sand or gravel. The number of eggs laid ranges from 50 to 1000 with larger females producing more (one-year-olds on average lay 83 eggs and two-year-olds produce 270). Juveniles remain in the spawning habitat for 2–4 weeks after hatching. Slenderhead darters reach sexual maturity after one year. [4]

Development

When Slenderhead darters hatch, they are around 19 millimeters in length. There is continual growth during the first year, with one year old individuals averaging 46 millimeters. There is little influence of sex on size. Individuals will become sexually mature after one year. After approximately one month in the spawning habitat, the darters move to deeper water. [4]

Diet

Slenderhead darters are lie-in-wait predators that feed predominantly on insect larvae, crustaceans, and other aquatic invertebrates. A study conducted in Illinois examined the contents of several darters' stomachs and found that 99 percent of the contents were midge larvae, blackfly larvae, caddisfly larvae, and mayfly naiads. [4]

Related Research Articles

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The channel 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 native to North America where it typically occurs in the sandy or gravelly shallows of lakes and in small and medium-sized rivers in riffles over sand, gravel or rock bottoms. It is a small fish ranging from 34 to 72 mm in length, olive brown with darker speckles and sometimes with a dark spot below the eye and dark blotches along the flank. It feeds mostly on insect larvae and other small invertebrates and breeds in small streams. This species is listed as threatened by the Canadian Species at Risk Act (SARA) but overall it has a wide range and numerous sub-populations and the International Union for Conservation of Nature has rated it as a "least concern species".

Dusky darter Species of fish

The dusky 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, but not confined to, both large and small rivers, and shallow creeks, in the eastern, southern, and southeastern United States, particularly the Mississippi River drainage system.

Blenny darter Species of fish

The blenny 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 a poorly known species which occurs in Alabama and Tennessee where it inhabits swift riffles.

Mud darter Species of fish

The mud 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 lowlands of the Mississippi River basin from Wisconsin and Minnesota south to Louisiana and East Texas. It is also found in the drainages of the Sabine and Neches Rivers of Texas and Louisiana. It can be found in slow-moving waters on riffles in rivers, as well as in creeks, swamps, lakes, and reservoirs. It mostly consumes the larvae of midges and blackflies. This species can reach a length of 7.1 cm (2.8 in), though most only reach a length of 5 cm (2.0 in).

Bluebreast darter Species of fish

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Gulf darter Species of fish

The gulf 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 Louisiana, Mississippi, Alabama, Florida, Tennessee, and Kentucky. It is a colorful fish, males having vertical barring of red-orange and blue-green near the tail, growing to a length of about 7.8 centimeters (3.1 in). It is typically found in small and medium-sized creeks, often in very shallow water. It occurs over sandy bottoms and among aquatic vegetation such as Sparganium americanum, foraging among the plants and organic debris for insect larvae and small invertebrates. The International Union for Conservation of Nature has assessed its conservation status as being of "least concern".

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The frecklebelly 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 primarily occurs in the upper Kentucky and Green river systems of eastern and central Kentucky and north-central Tennessee, being found mostly in the Cumberland Plateau and Highland Rim regions. The fish gets its name from gets its name from the scattered dark spots on its relatively pale underside. However, a possible more telling characteristic of the species is the systematical arrangement of the spots at the base of the tail as well as the continuous stripes down either side of the back. Total population size is unknown but figured to be relatively large. The frecklebelly darter is a benthic darter that relies on invertebrates as its principal diet. The frecklebelly darter can be found primarily in creeks and small rivers with a moderate gradient and a pool/riffle type flow, and spends most of its time in midwater areas of the stream. The major threats of the frecklebelly darter include decimation through perturbations such as strip mining as well as stream channelization projects. The darter is thought to have a high resilience with minimum population doubling time less than 15 months; it is also believed to have low vulnerability. Frecklebelly darter females contain about 100-300 mature ova depending on size. Fish become mature by age 1. Spawning in this darter species involves egg burial where the male mounts the female and deposits eggs in deep depressions created by receptive females.

The saddleback 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 native to the eastern United States. This darter species is widespread, occurring from the Escambia River drainage west to the Mississippi River basin and as far north as the Wabash River historically. Some populations have been reported in the Tennessee River drainage. The saddleback darter is aptly named as it has 5 saddle-like patterns on its dorsum, with the first occurring near the first dorsal fin and the fifth near the caudal penduncle. Adults can attain a maximum size of about 3 inches or 7.8 centimeters. The saddleback darter typically occurs over sand and gravel runs of creeks and small to medium-sized rivers and is sometimes found in very shallow water. This darter's diet consists of invertebrates such as caddisfly larvae, beetles, mayflies, and stoneflies. The saddleback darter deposits eggs over sand and gravel shoals during the spring. This species has an average lifespan between 2 and 3 years.

The sickle darter is a recently identified 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 closely related to a well-known darter, Percina macrocephala. Discovered in 2007 in the upper Tennessee River drainage, the sickle darter is a small ,slender bodied, freshwater and benthopelagic fish that most likely feeds on small crayfish and mayflies since it shares a large mouth and long snout with its sister species. The known distribution of the sickle darter is the upper drainage of the Tennessee River of Tennessee, North Carolina and Virginia. It is distinguished from all other Percina darters except its sister species P. macrocephala by a dark suborbital bar and a black bar subtending a medial black spot on the base of the caudal fin. It stays in mostly rocky, sandy, or silty substrates in clear creeks or small rivers in the Appalachian Mountains. The sickle darter spawns in late winter in gravel shoals. It also has large scales which make it different from macrocephala. It's known to be extirpated from most of its home habitat mainly because of agricultural practices that cause siltation and turbidity which causes most populations of the sickle darter to be widely scattered. But where it is found, it can be observed with regularity. Taking all this into consideration, the sickle darter does not have a formal conservation status under any federal or state law although its closely related species is considered a species of concern by the TWRA. Future management plans should include finding more locations of the sickle darter and decreasing further habitat destruction in known distributions by stating it as a fish of concern by state law.

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

Etheostoma variatum, the variegate 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 native to the eastern United States where it occurs primarily in the Ohio River basin; it is present in the states of Ohio, New York, Pennsylvania, Indiana, West Virginia and Kentucky with a small population in Virginia. It is a large darter, growing to 10 cm (4 in) long, orange-red with black vertical barring on its body, and horizontal barring on its front dorsal fin. Its typical habitat is swift-flowing riffles with rubble, boulder and gravel. No major threats have been identified for this fish and the International Union for Conservation of Nature has assessed its conservation status as being of "least concern".

<i>Percina roanoka</i> Species of fish

Percina roanoka, the Roanoke 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 isnative to Virginia, West Virginia and North Carolina in the United States. It is found in the Roanoke, Tar, and Neuse river systems, typically in small to medium size rivers. It is a colorful species with an average length of 4.3 centimeters (1.7 in). It feeds on insect larvae and other small invertebrates, and spawns in late May and June. It is a common fish with a very wide range and the International Union for Conservation of Nature has classified its conservation status as being of "least concern".

The lipstick 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, where it occurs in the Tallapoosa River drainage above the Fall Line in Alabama and Georgia. It inhabits rocky riffles of creeks and small to medium rivers.

Halloween darter Species of fish

The Halloween darter is a small freshwater fish native to North America. It is found in Georgia and Alabama in the drainage basin of the Apalachicola River, specifically in the Flint River system and the Chattahoochee River system. It prefers shallow, fast-flowing areas with gravel bottoms in small and medium-sized rivers. It was first described in 2008, having not previously been distinguished from the blackbanded darter (P. nigrofasciata), which occurs in the same watershed. The color is somewhat variable, being generally blackish dorsally, with some individuals having indistinct saddle-like barring. Males have orange and dark lateral striping while females have dark stripes and a yellowish-green belly. At a maximum standard length of 101 mm (4 in), males are slightly larger than females, and both sexes develop distinctive orange barring on the edge of the first dorsal fin during the breeding season.

References

  1. 1 2 NatureServe (2013). "Percina phoxocephala". IUCN Red List of Threatened Species . 2013: e.T202590A18230826. doi: 10.2305/IUCN.UK.2013-1.RLTS.T202590A18230826.en . Retrieved 19 November 2021.
  2. Froese, Rainer; Pauly, Daniel (eds.) (2019). "Percina phoxocephalum" in FishBase. December 2019 version.
  3. 1 2 3 "Fish Details". www.seagrant.wisc.edu. Archived from the original on 2015-05-18.
  4. 1 2 3 4 5 6 The life history of the slenderhead darter, Percina phoxocephala, in the Embarras River, Illinois /. Vol. 74. Illinois Dept. of Registration and Education, Natural History Survey Division.
  5. "Archived copy". Archived from the original on 2010-06-29. Retrieved 2013-01-05.{{cite web}}: CS1 maint: archived copy as title (link) www.bio.txstate.edu (Percina phoxocephala)
  6. "Slenderhead Darter".