Gambusia heterochir és un peix de la família dels pecílids i de l'ordre dels ciprinodontiformes.[2]
Es troba a Nord-amèrica: Texas (Estats Units).[1]
Gambusia heterochir és un peix de la família dels pecílids i de l'ordre dels ciprinodontiformes.
The Clear Creek gambusia (Gambusia heterochir) is a species of fish in the family Poeciliidae endemic to the United States, particularly Menard County, Texas.[3]
The Clear Creek gambusia inhabits the headwaters of Clear Creek which are derived from springs with clear, acidic water and having a constant temperature. It occurs in area where there is a growth of Ceratophyllum, an aquatic plant, which is also home to this fish's main prey item, the endemic amphipod Hyalella taxana. The submerged vegetation also gives the gambusia cover from its predators. This is an ovoviviparous species and the young are born live. Most births occur between March and September. The fish live their entire lives in the clear spring waters of the Clear Creek tributary of the San Saba River. The fish congregate around submerged aquatic vegetation that provides them with food and shelter.[4]
The range of the Clear Creek gambusia was shrunk due to the construction of dams which allowed western mosquitofish (Gambusia affinis) to displace them, as the construction of the dams resulted in a greater variation in water temperatures which the western mosquitofish could tolerate better than the Clear Creek gambusia. By 1979 the last remaining population was protected from competing congeners by being upstream from a dam, below which the waters were populated by mosquito fish. The dam had been damaged by the activities of nutria (Myocastor coypus) and by the growth of tree roots, and hybridization between the Clear Creek gambusia and the western mosquitofish was detected. The dam was repaired, the population increased and in 1985 large numbers of Clear Creek gambusia were detected below the dam. The waters below the dam now had populations of rainwater killifish (Lucania parva), a species not native to the area and thought to be introduced as discarded fishing bait, however, it is thought that the rainwater killifishes outcompeted the western mosquitofish, allowing the Clear Creek gambusia to expand downstream of the dam. The Clear Creek gambusia was put on the United States' list of endangered species in 1967.[4]
The Clear Creek gambusia (Gambusia heterochir) is a species of fish in the family Poeciliidae endemic to the United States, particularly Menard County, Texas.
Gambusia heterochir es un pez de la familia de los pecílidos en el orden de los ciprinodontiformes.
Se encuentran en Norteamérica: Texas (Estados Unidos).[2]
Gambusia heterochir es un pez de la familia de los pecílidos en el orden de los ciprinodontiformes.
Gambusia heterochir Gambusia generoko animalia da. Arrainen barruko Poeciliidae familian sailkatzen da.
Gambusia heterochir Gambusia generoko animalia da. Arrainen barruko Poeciliidae familian sailkatzen da.
Gambusia heterochir is een zoetwatervis, verwant aan het muskietenvisje, uit de familie Poeciliidae en de orde tandkarpers.[2] Het visje is inheems in het stroomgebied van de San Sabarivier in Texas (Menard County). Gambusia heterochir is gemiddeld 3,5 cm maar kan maximaal 5,4 cm worden. De soort staat als kwetsbaar op de internationale rode lijst.[1]
Bronnen, noten en/of referentiesGambusia heterochir é uma espécie de peixe da família Poeciliidae.[1]
É endémica dos Estados Unidos da América.
Gambusia heterochir é uma espécie de peixe da família Poeciliidae.
É endémica dos Estados Unidos da América.
Gambusia heterochir là một loài cá thuộc họ Poeciliidae. Nó là loài đặc hữu của Hoa Kỳ, cụ thể ở quận Menard, Texas.
Bài viết Lớp Cá vây tia này vẫn còn sơ khai. Bạn có thể giúp Wikipedia bằng cách mở rộng nội dung để bài được hoàn chỉnh hơn. Gambusia heterochir là một loài cá thuộc họ Poeciliidae. Nó là loài đặc hữu của Hoa Kỳ, cụ thể ở quận Menard, Texas.
異鰭食蚊魚，為輻鰭魚綱鯉齒目鯉齒亞目花鳉科的其中一種，被IUCN列為易危保育類動物，分布於北美洲美國德州Clear溪源頭流域，體長可達5.4公分，棲息在植被生長的湧泉處，屬於肉食性，生活習性不明。
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