Phylogeography and evolution of butterflyfish in the subgenus Corallochaetodon : Chaetodon lunulatus, Chaetodon trifasciatus, Chaetodon austriacus, Chaetodon melapterus

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2014-05
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Waldrop, Ellen Marie
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[Honolulu] : [University of Hawaii at Manoa], [May 2014]
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Abstract
The subgenus Corallochaetodon consists of four partially overlapping specialized corallivores: Chaetodon lunulatus (Pacific Ocean), Chaetodon trifasciatus (Indian Ocean), Chaetodon melapterus (northern Indian Ocean), Chaetodon austriacus (Red Sea). Phylogenetic and population genetic analysis of mtDNA cytochrome b sequences reveal divergent patterns of genetic diversity and population structure. Phylogenetic reconstruction shows that C. lunulatus diverged from sister species C. trifasciatus approximately 3 million years ago, while C. melapterus and C. austriacus comprise a cluster of closely related haplotypes derived from C. trifasciatus over the last half million years. Microsatellite loci analysis revealed varying levels of population structure in C. lunulatus and C. trifasciatus. This evolutionary divergence may have been initiated along biogeographic boundaries such as the barrier between Indian and Pacific Oceans, and between the Indian Ocean and Red Sea. Species integrity in regions of overlap may be reinforced by ecological factors such as mate choice, habitat preferences, and the documented differences in coral prey between species.
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M.S. University of Hawaii at Manoa 2014.
 Includes bibliographical references.
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species integrity, mtDNA cytochrome b
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http://hdl.handle.net/10125/100500
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Theses for the degree of Master of Science (University of Hawaii at Manoa). Zoology.
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M.S. - Zoology
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