Arid
Genetic differentiation and biogeography in Saharan populations of the genus Barbus (Osteichthyes, Cyprinidae)
Doadrio, I; Bouhadad, R; Machordom, A
通讯作者Doadrio, I
会议名称International Round Table Barbus IV
会议日期JUN 24-27, 1997
会议地点THESSALONIKI, GREECE
英文摘要

Eighteen Barbus samples from the Sahara Desert territory of Morocco, Algeria and Tunisia were studied by allozyme electrophoresis. Initially, eight different taxa were identified. Five species of the genus Barbus are recognised in the Sahara Desert: B. antinorii only known from small wells in the Tunisian desert, B. biscariensis widely distributed through the Algerian desert and the Biskra Mountains, B. massaensis in west Morocco from the Massa basin to the Tamrhakht basin, B. pallaryi from the Zousfana basin and springs with thermal waters around the Figuig oasis and B. lepineyi grouping populations of the Noun, Dra and Ziz basins. Two main lineages can be differentiated: B. pallaryi, B. lepineyi and B. massaensis from the Western Sahara, and B. biscariensis from the Eastern Sahara. The phylogenetic relationships of B. antinorii are an exception to the model. This last species inhabiting the Eastern Sahara is closer phylogenetically to Western Saharan species. A tentative model of double colonisation is proposed for southern Atlas Saharan barbels as a result of these phylogenetic relationships. In the Western Sahara, two ancient hydrographic systems are postulated. The first, located in the most westerly region, is currently formed by the basins of the rivers Dra, Noun and Ziz. The second, situated in eastern Morocco and western Algeria, is currently formed by the Zousfana basin. The separation of these two hydrographic systems occurred during the Upper Pliocene (1.7 my). The time of separation between B. callensis from northern Algeria and Tunisia and B. biscariensis and B. antinorii south of these countries contradicts the classical hypothesis of a European origin for North African barbel and colonisation through Spain during the Messenian crisis and supports the hypothesis of a more ancient origin for African barbels and a southern colonisation of the Iberian Peninsula for this evolutionary branch of limnophilous barbel.


英文关键词allozymes desert fishes genetic diversity evolution
来源出版物FOLIA ZOOLOGICA
ISSN0139-7893
出版年1998
卷号47
页码7-20
出版者INST VERTEBRATE BIOLOGY AS CR
类型Article;Proceedings Paper
语种英语
国家Spain;Algeria
收录类别CPCI-S ; SCI-E
WOS记录号WOS:000077889900002
WOS关键词ALLOZYME ELECTROPHORESIS ; AFRICAN ; CONSERVATION
WOS类目Zoology
WOS研究方向Zoology
资源类型会议论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/292200
作者单位(1)CSIC, Museo Nacl Ciencias Nat, E-28006 Madrid, Spain;(2)Univ Sci Boumediennes, Lab Ecol Anim, Algiers, Algeria
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Doadrio, I,Bouhadad, R,Machordom, A. Genetic differentiation and biogeography in Saharan populations of the genus Barbus (Osteichthyes, Cyprinidae)[C]:INST VERTEBRATE BIOLOGY AS CR,1998:7-20.
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