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Experimental evidence for the biological species status in Lake Tana's Labeobarbus flock (Cyprinidae)

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image of Animal Biology
For more content, see Archives Néerlandaises de Zoologie (Vol 1-17) and Netherlands Journal of Zoology (Vol 18-52).

Lake Tana (Ethiopia) harbours the only known remaining intact species flock of large (max. 100 cm standard length, SL) cyprinid fishes (15 Labeobarbus spp.). In 'common garden' experiments progeny of the riverine spawning benthivorous L. tsanensis, and of the piscivorous L. truttiformis and L. megastoma was raised under similar environmental conditions to test if interspecific morphological differentiation would occur. Interspecific morphological differences and divergence were clearly observed early in ontogeny (≤ 40 mm SL). This study is the first to demonstrate direct proof for the genetic basis of morphological differentiation among these labeobarbs, providing further support that Lake Tana's labeobarb species are true biological species.

Affiliations: 1: Experimental Zoology Group, Wageningen Institute of Animal Sciences (WIAS), Wageningen University, Marijkeweg 40, 6700 AH Wageningen, The Netherlands; Wageningen IMARES, Institute for Marine Resources & Ecosystem Studies, PO Box 68, 1970 AB IJmuiden, The Netherlands; 2: Aquaculture and Fisheries Group, Wageningen Institute of Animal Sciences (WIAS), Wageningen University, Marijkeweg 40, 6700 AH Wageningen, The Netherlands; 3: Experimental Zoology Group, Wageningen Institute of Animal Sciences (WIAS), Wageningen University, Marijkeweg 40, 6700 AH Wageningen, The Netherlands

10.1163/157075610X491725
/content/journals/10.1163/157075610x491725
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/content/journals/10.1163/157075610x491725
2010-06-01
2016-12-03

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