The Mobile logperch (''Percina kathae'') is a species of freshwater

ray-finned fish Actinopterygii (; ), members of which are known as ray-finned fish or actinopterygians, is a class of bony fish that comprise over 50% of living vertebrate species. They are so called because of their lightly built fins made of webbings of sk ...

, a darter from the

subfamily In biological classification, a subfamily (Latin: ', plural ') is an auxiliary (intermediate) taxonomic rank, next below family but more inclusive than genus. Standard nomenclature rules end botanical subfamily names with "-oideae", and zo ...

Etheostomatinae Etheostomatinae is a species-rich subfamily of freshwater ray-finned fish, the members of which are commonly known as the darters. The subfamily is part of the family Percidae which also includes the perches, ruffes and pikeperches. The family ...

, part of the

family Family (from ) is a Social group, group of people related either by consanguinity (by recognized birth) or Affinity (law), affinity (by marriage or other relationship). It forms the basis for social order. Ideally, families offer predictabili ...

Percidae The Percidae are a family of ray-finned fish, part of the order Perciformes, which are found in fresh and brackish waters of the Northern Hemisphere. The majority are Nearctic, but there are also Palearctic species. The family contains nearly 250 ...

, which also contains the

perch Perch is a common name for freshwater fish from the genus ''Perca'', which belongs to the family Percidae of the large order Perciformes. The name comes from , meaning the type species of this genus, the European perch (''P. fluviatilis'') ...

es, ruffes and pikeperches. It is found in the

Mobile River The Mobile River is located in southern Alabama in the United States. Formed out of the confluence of the Tombigbee and Alabama rivers, the approximately river drains an area of of Alabama, with a watershed extending into Mississippi, Georg ...

basin in

Mississippi Mississippi ( ) is a U.S. state, state in the Southeastern United States, Southeastern and Deep South regions of the United States. It borders Tennessee to the north, Alabama to the east, the Gulf of Mexico to the south, Louisiana to the s ...

Alabama Alabama ( ) is a U.S. state, state in the Southeastern United States, Southeastern and Deep South, Deep Southern regions of the United States. It borders Tennessee to the north, Georgia (U.S. state), Georgia to the east, Florida and the Gu ...

Tennessee Tennessee (, ), officially the State of Tennessee, is a landlocked U.S. state, state in the Southeastern United States, Southeastern region of the United States. It borders Kentucky to the north, Virginia to the northeast, North Carolina t ...

, and

Georgia Georgia most commonly refers to: * Georgia (country), a country in the South Caucasus * Georgia (U.S. state), a state in the southeastern United States Georgia may also refer to: People and fictional characters * Georgia (name), a list of pe ...

in the southeastern United States. It inhabits clear shallow water and is often associated with '' Podostemum'' (riverweed). It grows to about and is distinguishable from other darters by the distinctive shape of its head and by its pale-yellow base color, with narrow bars on back and sides. It feeds on small invertebrates and breeds between February and May. Lake fish move into small streams to spawn. It is a common fish with a wide range and the

International Union for Conservation of Nature The International Union for Conservation of Nature (IUCN) is an international organization working in the field of nature conservation and sustainable use of natural resources. Founded in 1948, IUCN has become the global authority on the stat ...

has classified its conservation status as being of "

least concern A least-concern species is a species that has been evaluated and categorized by the International Union for Conservation of Nature (IUCN) as not being a focus of wildlife conservation because the specific species is still plentiful in the wil ...

Anatomy and description

Logperches are easily distinguished from most other darters by their tiger-like coloration. They also have distinctive head and snout shapes. Logperches are a pale-yellow base color, with narrow bars on the side and back. Logperches reach a maximum size of about and a maximum age of about four years.Carlson, R.L. 2010. The ecological morphology of darter fishes. Biological Journal of the Linnean Society 100: 30–45.

Distribution and habitat

Mobile logperches live primarily in the Southeastern U.S. They are endemic to all river systems of the

basin in

, and

. They are particularly widespread in the upper Cahaba and

Coosa River The Coosa River is a tributary of the Alabama River in the U.S. states of Alabama and Georgia (U.S. state), Georgia. The river is about long.U.S. Geological Survey. National Hydrography Dataset high-resolution flowline dataThe National Map, ac ...

systems. Populations of the Mobile logperch and gulf logperch ('' Percina suttkusi'') occur together at certain locations in the

, Black Warrior, and upper and lower

Tombigbee River The Tombigbee River is a tributary of the Mobile River, approximately 200 mi (325 km) long, in the U.S. states of Mississippi and Alabama. Together with the Alabama, it merges to form the short Mobile River before the latter empties i ...

systems. Studies have been conducted in the

Conasauga River The Conasauga River is a river that runs through southeast Tennessee and northwest Georgia. The Conasauga River is longU.S. Geological Survey. National Hydrography Dataset high-resolution flowline dataThe National Map, accessed April 27, 2011 an ...

(Georgia and Tennessee);Argentina, J.E. 2010. The response of stream fish to local and reach-scale variation in the occurrence of a benthic aquaticmacrophyte. Freshwater Biology 55: 643–653.

Luxapallila Creek Luxapalila Creek (also spelled Luxapallila Creek) is a stream in Mississippi and Alabama in the United States. means "flying turtle" in the Choctaw language. The creek drains a watershed of and flows through Lamar County, Marion County, F ...

, Mississippi; and the

Neosho River The Neosho River is a tributary of the Arkansas River in eastern Kansas and northeastern Oklahoma in the United States. Its tributaries also drain portions of Missouri and Arkansas. The river is about long.U.S. Geological Survey. National ...

Kansas Kansas ( ) is a landlocked U.S. state, state in the Midwestern United States, Midwestern region of the United States. It borders Nebraska to the north; Missouri to the east; Oklahoma to the south; and Colorado to the west. Kansas is named a ...

. The Mobile logperch is found in shallow water in the summer, but uses deeper reaches, or uses depths randomly, in all other seasons.Gillette, D.P. 2006. Habitat use by a Midwestern U.S.A. riverine fish assemblage: effects of season, water temperature and river discharge. Journal of Fish Biology 68: 1494–1512. Like other logperches, they inhabit clear, gravelly streams and lakes. Logperches live in mostly shallow, clear water waterways. These habitats are associated with '' Podostemum'' ( riverweed). Some species (including ''

Percina ''Percina'' is a genus of small freshwater ray-finned fish belonging to the subfamily Etheostomatinae, which is part of the family Percidae. The Percidae family also includes the perches, ruffes and pikeperches from North America. Along with si ...

'') indicate that longitudinal position was a strong covariate with little support that ''Podostemum ''cover influenced occupancy. The greatest densities of Mobile logperch occur over gravel or sand substrates in moderate current or in lakes over sand and mud substrates.

Life history

Juveniles eat organisms such as

rotifers The rotifers (, from Latin 'wheel' and 'bearing'), sometimes called wheel animals or wheel animalcules, make up a phylum (Rotifera ) of microscopic and near-microscopic pseudocoelomate animals. They were first described by Rev. John Harris ...

copepods Copepods (; meaning 'oar-feet') are a group of small crustaceans found in nearly every freshwater and saltwater habitat. Some species are planktonic (living in the water column), some are benthic (living on the sediments), several species have ...

, and

waterfleas The Diplostraca or Cladocera, commonly known as water fleas, is a superorder of small, mostly freshwater crustaceans, most of which feed on microscopic chunks of organic matter, though some forms are predatory. Over 1000 species have been recog ...

. As they grow, they incorporate a greater variety of small aquatic creatures. They eat mostly

aquatic insects Aquatic insects or water insects live some portion of their life cycle in the water. They feed in the same ways as other insects. Some ''diving'' insects, such as predatory diving beetles, can hunt for food underwater where land-living insects c ...

(especially

mayfly Mayflies (also known as shadflies or fishflies in Canada and the upper Midwestern United States, as Canadian soldiers in the American Great Lakes region, and as up-winged flies in the United Kingdom) are aquatic insects belonging to the orde ...

and

midge A midge is any small fly, including species in several family (biology), families of non-mosquito nematoceran Diptera. Midges are found (seasonally or otherwise) on practically every land area outside permanently arid deserts and the frigid ...

larvae), and also may eat young

snail A snail is a shelled gastropod. The name is most often applied to land snails, terrestrial molluscs, terrestrial pulmonate gastropod molluscs. However, the common name ''snail'' is also used for most of the members of the molluscan class Gas ...

s, waterfleas,

leeches Leeches are segmented parasitic or predatory worms that comprise the subclass Hirudinea within the phylum Annelida. They are closely related to the oligochaetes, which include the earthworm, and like them have soft, muscular segmented bod ...

, and

fish eggs Roe, ( ) or hard roe, is the fully ripe internal egg masses in the ovaries, or the released external egg masses, of fish and certain marine animals such as shrimp, scallop, sea urchins and squid. As a seafood, roe is used both as a cooked in ...

(including their own) when available. ''Percina'' show broad diversity of reproductive behavior and life history traits.Paine, M.D. 2006. Life history tactics of darters and their relationship with body size, reproductive behaviour, latitude and rarity. Journal of Fish Biology 37: 473–488. Large numbers of reservoir-based individuals frequently migrate upstream into small flowing streams from late February into May to

spawn Spawn or spawning may refer to: * Spawning, the eggs and sperm of aquatic animals Arts, entertainment and media * Spawn (character), a fictional character in the comic series of the same name and in the associated franchise ** ''Spawn: Armageddon' ...

(in Carrolls Creek, a tributary of Lake Tuscaloosa,

). Females are thought to bury eggs in

riffles A riffle is a shallow landform in a flowing channel. Colloquially, it is a shallow place in a river where water flows quickly past rocks. However, in geology a riffle has specific characteristics. Topographic, sedimentary and hydraulic indica ...

shoals In oceanography, geomorphology, and geoscience, a shoal is a natural submerged ridge, bank, or bar that consists of, or is covered by, sand or other unconsolidated material, and rises from the bed of a body of water close to the surface or ...

of sand or gravel. Mobile logperch may live three to four years. They sometimes fall prey to

piscivorous A piscivore () is a carnivorous animal that primarily eats fish. Fish were the diet of early tetrapod evolution (via water-bound amphibians during the Devonian period); insectivory came next; then in time, the more terrestrially adapted rept ...

fish (more often in lakes than in streams). These fish include

lake trout The lake trout (''Salvelinus namaycush'') is a freshwater Salvelinus, char living mainly in lakes in Northern North America. Other names for it include mackinaw, namaycush, lake char (or charr), touladi, togue, laker, and grey trout. In Lake Sup ...

walleye The walleye (''Sander vitreus'', Synonym (taxonomy), synonym ''Stizostedion vitreum''), also called the walleyed pike, yellow pike, yellow pikeperch or yellow pickerel, is a freshwater perciform fish native to most of Canada and to the Northern ...

rock bass The rock bass (''Ambloplites rupestris''), also known as the rock perch, goggle-eye, red eye, and black perch, is a freshwater fish native to east-central North America. This red-eyed fish is a species of freshwater fish in the sunfish family (bi ...

largemouth bass The largemouth bass (''Micropterus nigricans'') is a carnivorous, freshwater fish, freshwater, ray-finned fish in the Centrarchidae (sunfish) family, native to the eastern United States, eastern and central United States, southeastern Canada an ...

burbot The burbot (''Lota lota''), also known as bubbot, mariah, loche, cusk, freshwater cod, freshwater ling, freshwater cusk, the lawyer, coney-fish, lingcod, or eelpout, is a species of coldwater ray-finned fish native to the subarctic regions of ...

, and

northern pike The northern pike (''Esox lucius'') is a species of carnivorous fish of the genus ''Esox'' (pikes). They are commonly found in brackish water, moderately salty and fresh waters of the Northern Hemisphere (''i.e.'' holarctic in distribution). T ...

. When they spend time in slow and shallow water, they also are eaten by fish-eating birds, such as

terns Terns are seabirds in the family (biology), family Laridae, subfamily Sterninae, that have a worldwide distribution and are normally found near the sea, rivers, or wetlands. Terns are treated in eleven genus, genera in a subgroup of the fam ...

and

mergansers ''Mergus'' is the genus of the typical mergansers ( ) fish-eating ducks in the subfamily Anatinae. The genus name is a Latin word used by Pliny the Elder and other Ancient Rome, Roman authors to refer to an unspecified waterbird. The common mer ...

Etymology

The Mobile logperch was first formally described in 1997 by the American

ichthyologist Ichthyology is the branch of zoology devoted to the study of fish, including bony fish (Osteichthyes), cartilaginous fish (Chondrichthyes), and jawless fish (Agnatha). According to FishBase, 35,800 species of fish had been described as of March 2 ...

Dr. Bruce A. Thompson (1946–2007) and its

specific name Specific name may refer to: * in Database management systems, a system-assigned name that is unique within a particular database In taxonomy, either of these two meanings, each with its own set of rules: * Specific name (botany), the two-part (bino ...

honors Thompson’s wife, Kathy S. Thompson.

Management

The Mobile logperch is not listed as endangered under Tennessee state law. Not much research on changes in this species' population over time and no management practices have been put in place to protect the Mobile logperch. The

has assessed the conservation status of this fish as being of "

References

{{Taxonbar, from=Q3752499 Percina Taxa named by Bruce A. Thompson Fish described in 1997