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Systematics and life history evoluti...

Shedlock, Andrew M.

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Systematics and life history evolution of world anglerfishes (Teleostei: Lophiiformes): Molecular tests of morphological hypotheses.

Record Type:	Electronic resources : Monograph/item
Title/Author:	Systematics and life history evolution of world anglerfishes (Teleostei: Lophiiformes): Molecular tests of morphological hypotheses./
Author:	Shedlock, Andrew M.
Description:	136 p.
Notes:	Source: Dissertation Abstracts International, Volume: 58-06, Section: B, page: 2903.
Contained By:	Dissertation Abstracts International58-06B.
Subject:	Biology, Zoology. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=9736378
ISBN:	9780591462739

Systematics and life history evolution of world anglerfishes (Teleostei: Lophiiformes): Molecular tests of morphological hypotheses.
Shedlock, Andrew M.

Systematics and life history evolution of world anglerfishes (Teleostei: Lophiiformes): Molecular tests of morphological hypotheses. - 136 p.

Source: Dissertation Abstracts International, Volume: 58-06, Section: B, page: 2903.

Thesis (Ph.D.)--University of Washington, 1997.

Previous hypotheses of relationship among lophiiform fishes, based largely on comparative anatomy, are tested with a new character set comprised of mitochondrial DNA (mtDNA) sequences. A region of the 16S ribosomal gene for sixteen lophiiform genera, representing eleven families and all anglerfish suborders, plus two batrachoidid outgroups was amplified via the polymerase chain reaction (PCR), sequenced, aligned and analyzed using both maximum parsimony and maximum likelihood. The same was done with a region of cytochrome b for a subset of these taxa. A modified DNA extraction protocol and PCR amplification strategy was developed to improve the effectiveness of working with formalin-fixed. fluid-preserved museum specimens. Patterns of nucleotide substitution were consistent with those expected and suggested the presence of good phylogenetic signal mixed with clear sequence saturation at some loci. Molecular trees among genes and methods of analysis were largely congruent but differed in several aspects from those of previous studies based on morphology, most notably in the position of lophiids and in the relationships among ceratioid families. Morphological and molecular trees were reconciled using component analysis and selected synapomorphies were mapped onto molecular trees. Results support an evolutionary model in which sexual parasitism arose relatively abruptly in ancestral ceratioids and is less homoplastic in nature than previously proposed. The position of Gigantactis in the molecular phylogeny lends some indirect support for light organ symbiosis as a derived condition in the suborder.

ISBN: 9780591462739Subjects--Topical Terms:

1018632
Biology, Zoology.

Systematics and life history evolution of world anglerfishes (Teleostei: Lophiiformes): Molecular tests of morphological hypotheses.
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040 $a UMI $c UMI
100 1 $a Shedlock, Andrew M. $3 1924451
245 1 0 $a Systematics and life history evolution of world anglerfishes (Teleostei: Lophiiformes): Molecular tests of morphological hypotheses.
300 $a 136 p.
500 $a Source: Dissertation Abstracts International, Volume: 58-06, Section: B, page: 2903.
500 $a Chair: Theodore W. Pietsch.
502 $a Thesis (Ph.D.)--University of Washington, 1997.
520 $a Previous hypotheses of relationship among lophiiform fishes, based largely on comparative anatomy, are tested with a new character set comprised of mitochondrial DNA (mtDNA) sequences. A region of the 16S ribosomal gene for sixteen lophiiform genera, representing eleven families and all anglerfish suborders, plus two batrachoidid outgroups was amplified via the polymerase chain reaction (PCR), sequenced, aligned and analyzed using both maximum parsimony and maximum likelihood. The same was done with a region of cytochrome b for a subset of these taxa. A modified DNA extraction protocol and PCR amplification strategy was developed to improve the effectiveness of working with formalin-fixed. fluid-preserved museum specimens. Patterns of nucleotide substitution were consistent with those expected and suggested the presence of good phylogenetic signal mixed with clear sequence saturation at some loci. Molecular trees among genes and methods of analysis were largely congruent but differed in several aspects from those of previous studies based on morphology, most notably in the position of lophiids and in the relationships among ceratioid families. Morphological and molecular trees were reconciled using component analysis and selected synapomorphies were mapped onto molecular trees. Results support an evolutionary model in which sexual parasitism arose relatively abruptly in ancestral ceratioids and is less homoplastic in nature than previously proposed. The position of Gigantactis in the molecular phylogeny lends some indirect support for light organ symbiosis as a derived condition in the suborder.
590 $a School code: 0250.
650 4 $a Biology, Zoology. $3 1018632
690 $a 0472
710 2 $a University of Washington. $3 545923
773 0 $t Dissertation Abstracts International $g 58-06B.
790 1 0 $a Pietsch, Theodore W., $e advisor
790 $a 0250
791 $a Ph.D.
792 $a 1997
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=9736378