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The phylogeny of the Embiotocidae (T...

Cassano, Vicente Paulo Francisco.

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The phylogeny of the Embiotocidae (Teleostei: Perciformes): Cladistic analysis of comparative morphometry and 16SrDNA mitochondrial sequences.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	The phylogeny of the Embiotocidae (Teleostei: Perciformes): Cladistic analysis of comparative morphometry and 16SrDNA mitochondrial sequences./
作者:	Cassano, Vicente Paulo Francisco.
面頁冊數:	183 p.
附註:	Source: Dissertation Abstracts International, Volume: 59-09, Section: B, page: 4674.
Contained By:	Dissertation Abstracts International59-09B.
標題:	Biology, Molecular. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=9906117
ISBN:	9780599037588

The phylogeny of the Embiotocidae (Teleostei: Perciformes): Cladistic analysis of comparative morphometry and 16SrDNA mitochondrial sequences.
Cassano, Vicente Paulo Francisco.

The phylogeny of the Embiotocidae (Teleostei: Perciformes): Cladistic analysis of comparative morphometry and 16SrDNA mitochondrial sequences. - 183 p.

Source: Dissertation Abstracts International, Volume: 59-09, Section: B, page: 4674.

Thesis (Ph.D.)--University of California, Los Angeles, 1998.

Despite the almost a century of studies on viviparous surfperches of California, the relationships within the family Embiotocidae remain unresolved. Embiotocids are a morphologically diverse group of perciform fishes. The preponderance of monotypic genera in the family has always expressed very well the morphological diversity of surfperch species but has reduced almost to nothing the value of surfperch genera as a category demonstrating evolutionary relationships. A comprehensive revision of the family grouped together some of these species in polytypic genera but the stability of the new classification was never tested. Another significant issue is the existence of cryptic intraspecific geographic morphotypes reported in half of the North American surfperch species. Insular species were erected in accordance with such findings. Whether morphological differences between insular and littoral populations indicate a complete genetic break, of the nature of species boundaries or alternatively intraspecific lineage boundaries, was never tested. The shiner perch, Cymatogaster aggregata, was thought to have a congener in Santa Cruz Island. If true, this fact would have implications for both classification and conservation issues. There are also conflicting hypotheses of taxonomic composition and relationships between suprageneric groups. I attempted to resolve these issues by cladistic analyses of two independent databases: morphometric data, transformed body measurements and counts for 24 embiotocid species, and DNA sequences, 486 nucleotides of 16S rDNA mitochondrial gene, for 17 embiotocid species. An allozyme study was performed to assess the nature of the divergence between insular and littoral populations of shiner perch. The genetic analyses of populations of shiners suggested the existence of very severe restriction but no complete suppression of gene flow between coastal populations of shiners in the California Bight, falsifying the idea of an endemic shiner in Santa Cruz Island. The monophyly of the subfamily Amphisticinae is strongly supported. The monophyly of the other subfamily, the Embiotocinae, is supported to a less extent. The Embitocini, a large tribe of the Embiotocinae is paraphyletic in most phylogenies. Among polytypic genera, Amphisticus, Brachyistius, Hyperprosopon, and Micrometrus are monophyletic. Embiotoca, Phanerodon, and Rhacochilus are paraphyletic. A group of 10 embiotocins in eight genera was well supported in molecular phylogenies. The resolution of the Japanese clade conflicts among phylogenies from different datasets. The same is true for a Micrometrini monophyletic group that always includes Cymatogaster and Hysterocarpus in molecular phylogenies, but not in morphological ones. The systematic and taxonomy of the embiotocid fishes needs to be reviewed in the light of the present findings.

ISBN: 9780599037588Subjects--Topical Terms:

1017719
Biology, Molecular.

The phylogeny of the Embiotocidae (Teleostei: Perciformes): Cladistic analysis of comparative morphometry and 16SrDNA mitochondrial sequences.
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245 1 4 $a The phylogeny of the Embiotocidae (Teleostei: Perciformes): Cladistic analysis of comparative morphometry and 16SrDNA mitochondrial sequences.
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500 $a Source: Dissertation Abstracts International, Volume: 59-09, Section: B, page: 4674.
500 $a Chair: Donald G. Buth.
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520 $a Despite the almost a century of studies on viviparous surfperches of California, the relationships within the family Embiotocidae remain unresolved. Embiotocids are a morphologically diverse group of perciform fishes. The preponderance of monotypic genera in the family has always expressed very well the morphological diversity of surfperch species but has reduced almost to nothing the value of surfperch genera as a category demonstrating evolutionary relationships. A comprehensive revision of the family grouped together some of these species in polytypic genera but the stability of the new classification was never tested. Another significant issue is the existence of cryptic intraspecific geographic morphotypes reported in half of the North American surfperch species. Insular species were erected in accordance with such findings. Whether morphological differences between insular and littoral populations indicate a complete genetic break, of the nature of species boundaries or alternatively intraspecific lineage boundaries, was never tested. The shiner perch, Cymatogaster aggregata, was thought to have a congener in Santa Cruz Island. If true, this fact would have implications for both classification and conservation issues. There are also conflicting hypotheses of taxonomic composition and relationships between suprageneric groups. I attempted to resolve these issues by cladistic analyses of two independent databases: morphometric data, transformed body measurements and counts for 24 embiotocid species, and DNA sequences, 486 nucleotides of 16S rDNA mitochondrial gene, for 17 embiotocid species. An allozyme study was performed to assess the nature of the divergence between insular and littoral populations of shiner perch. The genetic analyses of populations of shiners suggested the existence of very severe restriction but no complete suppression of gene flow between coastal populations of shiners in the California Bight, falsifying the idea of an endemic shiner in Santa Cruz Island. The monophyly of the subfamily Amphisticinae is strongly supported. The monophyly of the other subfamily, the Embiotocinae, is supported to a less extent. The Embitocini, a large tribe of the Embiotocinae is paraphyletic in most phylogenies. Among polytypic genera, Amphisticus, Brachyistius, Hyperprosopon, and Micrometrus are monophyletic. Embiotoca, Phanerodon, and Rhacochilus are paraphyletic. A group of 10 embiotocins in eight genera was well supported in molecular phylogenies. The resolution of the Japanese clade conflicts among phylogenies from different datasets. The same is true for a Micrometrini monophyletic group that always includes Cymatogaster and Hysterocarpus in molecular phylogenies, but not in morphological ones. The systematic and taxonomy of the embiotocid fishes needs to be reviewed in the light of the present findings.
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650 4 $a Biology, Genetics. $3 1017730
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