Shallow genetic divergence and species delineations in the endemic Labeobarbus species flock of Lake Tana, Ethiopia

L.A.J. Nagelkerke, K.M. Leon-Kloosterziel, H.J.W.C. Megens, M. de Graaf, O.E. Diekmann, F.A. Sibbing

Research output: Contribution to journalArticleAcademicpeer-review

7 Citations (Scopus)

Abstract

To assess whether the species distinctions of Lake Tana’s Labeobarbus spp. are supported by genetic information, microsatellite markers were used. A total of 376 Labeobarbus spp., belonging to 24 populations of 11 species from three regions of the lake (north, south and east), were sampled. Eight microsatellite markers were analysed. In general, differences between conspecific populations were smaller than differences between populations of different species. For six species, conspecific populations from different regions in the lake were consistently more similar than populations of other species from the same region. For four species this was not the case, while for one species two populations were similar, but different from the third population. River-spawning species appeared to be more distinct than presumed lake spawners. On the species level, there was a significant correlation between genetic and morphological differentiation, especially in morphological aspects associated with ecological functioning. This suggests that genetic differentiation arose together with adaptive radiation, although the overall genetic differentiation among the Lake Tana Labeobarbus spp. is small.
Original languageEnglish
Pages (from-to)1191-1208
JournalJournal of Fish Biology
Volume87
Issue number5
DOIs
Publication statusPublished - 2015

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species flock
endemic species
Ethiopia
flocks
indigenous species
divergence
lakes
genetic variation
lake
genetic differentiation
microsatellite repeats
adaptive radiation
Labeobarbus
spawning
rivers

Cite this

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title = "Shallow genetic divergence and species delineations in the endemic Labeobarbus species flock of Lake Tana, Ethiopia",
abstract = "To assess whether the species distinctions of Lake Tana’s Labeobarbus spp. are supported by genetic information, microsatellite markers were used. A total of 376 Labeobarbus spp., belonging to 24 populations of 11 species from three regions of the lake (north, south and east), were sampled. Eight microsatellite markers were analysed. In general, differences between conspecific populations were smaller than differences between populations of different species. For six species, conspecific populations from different regions in the lake were consistently more similar than populations of other species from the same region. For four species this was not the case, while for one species two populations were similar, but different from the third population. River-spawning species appeared to be more distinct than presumed lake spawners. On the species level, there was a significant correlation between genetic and morphological differentiation, especially in morphological aspects associated with ecological functioning. This suggests that genetic differentiation arose together with adaptive radiation, although the overall genetic differentiation among the Lake Tana Labeobarbus spp. is small.",
author = "L.A.J. Nagelkerke and K.M. Leon-Kloosterziel and H.J.W.C. Megens and {de Graaf}, M. and O.E. Diekmann and F.A. Sibbing",
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pages = "1191--1208",
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Shallow genetic divergence and species delineations in the endemic Labeobarbus species flock of Lake Tana, Ethiopia. / Nagelkerke, L.A.J.; Leon-Kloosterziel, K.M.; Megens, H.J.W.C.; de Graaf, M.; Diekmann, O.E.; Sibbing, F.A.

In: Journal of Fish Biology, Vol. 87, No. 5, 2015, p. 1191-1208.

Research output: Contribution to journalArticleAcademicpeer-review

TY - JOUR

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AU - Leon-Kloosterziel, K.M.

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AU - de Graaf, M.

AU - Diekmann, O.E.

AU - Sibbing, F.A.

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AB - To assess whether the species distinctions of Lake Tana’s Labeobarbus spp. are supported by genetic information, microsatellite markers were used. A total of 376 Labeobarbus spp., belonging to 24 populations of 11 species from three regions of the lake (north, south and east), were sampled. Eight microsatellite markers were analysed. In general, differences between conspecific populations were smaller than differences between populations of different species. For six species, conspecific populations from different regions in the lake were consistently more similar than populations of other species from the same region. For four species this was not the case, while for one species two populations were similar, but different from the third population. River-spawning species appeared to be more distinct than presumed lake spawners. On the species level, there was a significant correlation between genetic and morphological differentiation, especially in morphological aspects associated with ecological functioning. This suggests that genetic differentiation arose together with adaptive radiation, although the overall genetic differentiation among the Lake Tana Labeobarbus spp. is small.

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