Etheostoma trisella és una espècie de peix de la família dels pèrcids i de l'ordre dels perciformes.[3]
Té lloc a l'hivern i a principis de la primavera a la capçalera del riu on viu. Els ous, enganxats al substrat i abandonats sense cap mena de protecció, fan la desclosa en uns trenta dies a 12 °C de temperatura. El rang d'edat de les femelles reproductores és d'1-2 anys[6] i pocs individus viuen fins als 3.[7][8][9]
Menja invertebrats (com ara copèpodes, larves de mosquit i de tricòpters i nimfes d'efemeròpters i de plecòpters).[7][8]
És d'aigua dolça, bentopelàgic i de clima subtropical (36°N-33°N), el qual viu als fons aquàtics de sorra i grava de rierols i de rius petits.[10]
Es troba a Nord-amèrica: la conca del riu Coosa al nord de Geòrgia,[11][12] el nord d'Alabama[13][14][15][16] i el sud-est de Tennessee.[8][1][6][17][18][19][20][21][10][22]
És inofensiu per als humans.[10]
Etheostoma trisella és una espècie de peix de la família dels pèrcids i de l'ordre dels perciformes.
The trispot darter (Etheostoma trisella) 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 northern Georgia and southern Tennessee in the United States, where it occurs in the Conasauga River and its tributaries and historically in the Alabama River system. It requires two interconnecting habitats; outside the breeding season it occupies the peripheral zones of the main river, with slow-moving water and silt gravel substrates with vegetation cover; during the breeding season it moves to warmer water with a clay-bottomed substrate with much vegetation. The population of this fish is declining due to loss of suitable habitat because of stream impoundment and land development. The International Union for Conservation of Nature has assessed its conservation status as being "vulnerable".
The trispot darter is endemic to the Conasauga River and its tributaries[5] located in northern Georgia and southern Tennessee. The species was thought to be extinct from its historical range for seven years, until a specimen was found in north Georgia in 1967. The historical range was in the Alabama River system and as far south as the Coosa River, and in some Georgia rivers. The species also was found in a reservoir, Lake Weiss. Other recent efforts to find the darter have not been successful; it is now only found in the Conasauga[5] and in Alabama's Big Canoe Creek.[6] The reason for the decline in distribution is thought to be due to human impact and development. Silt in water affects egg survival, and correct water temperature is vital for the species' breeding. The Conasauga River offers the critical, undisturbed habitat for the species.[7]
E. trisella requires two separate but interconnected habitats. When not breeding, it occupies the peripheral zones of the main river, with slow-moving water and silt gravel substrates with vegetation cover. The breeding habitat is much warmer water (water at 12 °C (54 °F) is best for egg maturation), and usually is a clay-bottomed substrate with heavy vegetation seepage.[5]
Chironomidae larvae account for 70% of the diet of this darter; Ephemeroptera nymphs account for another 19%, as measured by examining the fish's stomach contents.[7] The species coexists with several other species in its habitat, such as the central stoneroller (Campostoma anomalum), southern studfish (Fundulus stellifer), and Coosa darter (Etheostoma coosae). The species' only real competitor is the Coosa darter, because its mouth size and body length allow it to be a threat for food and space. The main natural predators of the species are from the black basses (genus Micropterus).[8] The average standard length of the fish is 35 millimeters (1.4 in).
The trispot darter has an average life span around 2.5 years.[8]
They spawn around January through March, when males' skin becomes brilliantly pigmented. The skin color is thought to in attracting mates. Egg clutch numbers vary from 50 to 300 eggs per female.[7]
The species is listed as being threatened with extinction and is on the decline.[1] Loss of habitat through land development and stream impoundment is the primary reason for the species' decline.[9]
The trispot darter (Etheostoma trisella) 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 northern Georgia and southern Tennessee in the United States, where it occurs in the Conasauga River and its tributaries and historically in the Alabama River system. It requires two interconnecting habitats; outside the breeding season it occupies the peripheral zones of the main river, with slow-moving water and silt gravel substrates with vegetation cover; during the breeding season it moves to warmer water with a clay-bottomed substrate with much vegetation. The population of this fish is declining due to loss of suitable habitat because of stream impoundment and land development. The International Union for Conservation of Nature has assessed its conservation status as being "vulnerable".
Etheostoma trisella es una especie de peces de la familia Percidae en el orden de los Perciformes.
Los machos pueden llegar alcanzar los 5,9 cm de longitud total.[2]
Se encuentran en Norteamérica: Georgia, Alabama y sudeste de Tennessee.
Etheostoma trisella Etheostoma generoko animalia da. Arrainen barruko Percidae familian sailkatzen da.
Etheostoma trisella Etheostoma generoko animalia da. Arrainen barruko Percidae familian sailkatzen da.
Etheostoma trisella is een straalvinnige vissensoort uit de familie van de echte baarzen (Percidae).[1] De wetenschappelijke naam van de soort is voor het eerst geldig gepubliceerd in 1963 door Bailey & Richards.
Bronnen, noten en/of referenties
Etheostoma trisella é uma espécie de peixe da família Percidae.
É endémica dos Estados Unidos da América.
Etheostoma trisella é uma espécie de peixe da família Percidae.
É endémica dos Estados Unidos da América.
Etheostoma trisella là một loài cá thuộc họ Percidae. Chúng là loài đặc hữu của Hoa Kỳ.
Bài viết chủ đề bộ Cá vược này vẫn còn sơ khai. Bạn có thể giúp Wikipedia bằng cách mở rộng nội dung để bài được hoàn chỉnh hơn. 三點鏢鱸為輻鰭魚綱鱸形目鱸亞目河鱸科的其中一種，被IUCN列為次級保育類動物，分布於美國Coosa河流域，體長可達5.9公分，棲息在水淺、沙石底質的溪流，屬肉食性，以水生昆蟲、橈腳類等為食。
这是一篇與鱸形目相關的小作品。你可以通过编辑或修订扩充其内容。 
