| 翻訳と辞書 |
| Fatlips minnow ： ウィキペディア英語版 |
Fatlips minnow
The fatlips minnow (''Phenacobius crassilabrum'') is a species of suckermouth minnow that was first described in the upper Tennessee River system. No fewer than 20 specimens were used for description, and the epithet ''crassilabrum'' (from the Latin ''crassus'' meaning thick or fat and labrum, or lip) was assigned to the species, separating it from ''Phenacobius catostomus,'' with which it had previously been identified. The first holotype specimem collected in 1947 was an adult female in length from the River.〔Dimmick, W.W. 1999. Phylogenetic relationships of the suckermouth minnows, genus ''Phenacobius'', inferred from parsimony analyses of nucleotide sequence allozymic and morphological data (''Cyprinidae'':''Cypriniformes'')〕
==Geographic distribution==
The distribution of the fatlips minnow is restricted to North America, where it occurs in the upper Tennessee River drainage in western Virginia, western North Carolina, eastern Tennessee and northeastern Georgia. Its habitat is gravel and riffles in small to medium creeks.〔Pritt, J.J. 2010. Quantitative Determination of Rarity of Freshwater Fishes and Implications for Imperiled Species Designations. Conservation Biology. 24: 1249-1258.〕 The fatlips minnow is believed to have arisen from a ''P. catostomus'' -like stock population that re-invaded the upper Tennessee River via reciprocal stream piracy. A genetic sister relationship between ''P. crassilabrum'' and ''P. uranops'' has been consistently resolved.〔Minkcley, W.L. and Craddock, J.E. 1962. A new species of ''Phenacobius'' (''Cyprinidae'') from the upper Tennessee River System. Copeia. 2: 369-377.〕 The ranges of ''P. crassilabrum'' and ''P. uranops'' complement one another in the Tennessee River system, with the former opting for higher elevations. In Virginia, ''P. crassilabrum'' occupies the lower free-flowing portion of the South Fork of Holston River and Laurel Creek.
There are documented instances of nonindigenous (out-of-range) occurrences of ''Phenacobius'' species; these are believed to be a result of fishermen releasing their unused baitfish into local bodies of water.〔Nico, L., J. Larson, and A. Fusaro. 2013. (Phenacobius mirabilis ). USGS Nonindigenous Aquatic Species Database, Gainesville, FL. Revision Date: 12/20/2011〕 The current population of ''P. crassilabrum'' is presumed to be about 10,000 individuals.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
■ウィキペディアで「Fatlips minnow」の詳細全文を読む
スポンサード リンク
| 翻訳と辞書 : 翻訳のためのインターネットリソース |
Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.
|
|