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PMID: 10468591 Published · ppublish English Journal Article Research Support, Non-U.S. Gov't Research Support, U.S. Gov't, Non-P.H.S.

Replicated evolution of trophic specializations in an endemic cichlid fish lineage from Lake Tanganyika.

Proceedings of the National Academy of Sciences of the United States of America ·Vol. 96 ·No. 18 ·1999-08-31 ·Pages 10230-5

Rüber L, Verheyen E, Meyer A

Abstract

The current phylogenetic hypothesis for the endemic Lake Tanganyika cichlid fishes of the tribe Eretmodini is based solely on morphology and suggests that more complex trophic morphologies derived only once from a less specialized ancestral condition. A molecular phylogeny of eretmodine cichlids based on partial mitochondrial DNA cytochrome b and control-region sequences was used to reconstruct the evolutionary sequence of trophic adaptations and to test alternative models of morphological divergence. The six mitochondrial lineages found disagree with the current taxonomy and the morphology-based phylogeny. Mitochondrial lineages with similar trophic morphologies are not grouped monophyletically but are typically more closely related to lineages with different trophic phenotypes currently assigned to other genera. Our results indicate multiple independent origins of similar trophic specializations in these cichlids. A pattern of repeated divergent morphological evolution becomes apparent when the phylogeography of the mitochondrial haplotypes is analyzed in the context of the geological and paleoclimatological history of Lake Tanganyika. In more than one instance within Lake Tanganyika, similar morphological divergence of dentitional traits occurred in sympatric species pairs. Possibly, resource-based divergent selective regimes led to resource partitioning and brought about similar trophic morphologies independently and repeatedly.

MeSH Terms
Animals Burundi Cytochrome b Group/genetics DNA, Mitochondrial/genetics Democratic Republic of the Congo Evolution, Molecular Fresh Water Geography Geological Phenomena Geology Paleodontology Paleontology Perches/classification,genetics,physiology Phylogeny Tanzania Zambia
Chemicals
Cytochrome b Group DNA, Mitochondrial
Authors & Affiliations
3 authors, click to expand affiliations / ORCID
Rüber L
Zoological Museum, University of Zürich, Winterthurerstrasse 190, 8057 Zürich, Switzerland. [email protected]
Verheyen E
Meyer A
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Article Info
Journal
Proceedings of the National Academy of Sciences of the United States of America
Abbr.
Proc Natl Acad Sci U S A
ISSN
0027-8424
DOI
10.1073/pnas.96.18.10230
Email
[email protected]
Published
1999-08-31
Pages
10230-5
Language
English
Region
United States
NLM ID
7505876
PMCID
PMC17871
Subset
IM
Databases
GENBANK
Y15133, Y15134, Z97410, Z97411, Z97412, Z97413, Z97414, Z97415, Z97416, Z97417, Z97418, Z97419, Z97420, Z97421, Z97422, Z97423, Z97424, Z97425, Z97426, Z97427, Z97428, Z97429, Z97430, Z97431, Z97432, Z97433, Z97434, Z97435, Z97436, Z97437
External Links
PubMed source DOI: 10.1073/pnas.96.18.10230 PMC Full Text View journal details
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