AustralieFrV1, Main, Exploration, bibRecord, 004A53

Geometric morphometrics as a tool for identifying emperor fish (Lethrinidae) larvae and juveniles

Identifieur interne : 004A53 ( Main/Exploration ); précédent : 004A52; suivant : 004A54

Geometric morphometrics as a tool for identifying emperor fish (Lethrinidae) larvae and juveniles

Auteurs : D. Ponton [France] ; L. Carassou [Afrique du Sud] ; S. Raillard [Australie] ; P. Borsa [Indonésie]

Source :

Journal of Fish Biology [ 0022-1112 ] ; 2013-07.

RBID : ISTEX:1CEA8862AECFF9E7530A96546B58DAC2D185FA65

Descripteurs français

Pascal (Inist)
- Biologie, Identification espèce, Larve, Morphométrie, Pisces.
Wicri :
- topic : Biologie, Logiciel.

English descriptors

Abstract

The aim of this study was to evaluate the efficiency of geometric morphometrics for describing the body shape of fish larvae and juveniles, and identifying them to species, in comparison with traditional linear measurements. Species of emperor fishes (Perciformes: Lethrinidae, genus Lethrinus) were chosen as the model group, as the late larval and early juvenile stages in this genus are particularly difficult to identify. Forty‐five individuals of different species of Lethrinus were collected from the south‐western lagoon of New Caledonia between May 2005 and March 2006. The individuals were first identified to species by their partial cytochrome‐b gene sequence. They were then morphologically characterized using eight linear measurements and 23 landmarks recorded on digital photographs. Except for a small proportion of individuals, geometric morphometrics gave better results to distinguish the different species than linear measurements. A ‘leave one out’ approach confirmed the nearly total discrimination of recently settled Lethrinus genivittatus and Lethrinus nebulosus, whereas traditional identification keys failed to distinguish them. Therefore, geometric morphometrics is a promising tool for identifying fish larvae and juveniles to species. An effective approach would require building image databases of voucher specimens associated with their DNA barcodes. These images could be downloaded by the operator and processed with the specimens to be identified.

Url:

https://api.istex.fr/document/1CEA8862AECFF9E7530A96546B58DAC2D185FA65/fulltext/pdf

DOI: 10.1111/jfb.12138

Affiliations:

Le document en format XML

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<front><div type="abstract">The aim of this study was to evaluate the efficiency of geometric morphometrics for describing the body shape of fish larvae and juveniles, and identifying them to species, in comparison with traditional linear measurements. Species of emperor fishes (Perciformes: Lethrinidae, genus Lethrinus) were chosen as the model group, as the late larval and early juvenile stages in this genus are particularly difficult to identify. Forty‐five individuals of different species of Lethrinus were collected from the south‐western lagoon of New Caledonia between May 2005 and March 2006. The individuals were first identified to species by their partial cytochrome‐b gene sequence. They were then morphologically characterized using eight linear measurements and 23 landmarks recorded on digital photographs. Except for a small proportion of individuals, geometric morphometrics gave better results to distinguish the different species than linear measurements. A ‘leave one out’ approach confirmed the nearly total discrimination of recently settled Lethrinus genivittatus and Lethrinus nebulosus, whereas traditional identification keys failed to distinguish them. Therefore, geometric morphometrics is a promising tool for identifying fish larvae and juveniles to species. An effective approach would require building image databases of voucher specimens associated with their DNA barcodes. These images could be downloaded by the operator and processed with the specimens to be identified.</div>
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Serveur d'exploration sur les relations entre la France et l'Australie

Geometric morphometrics as a tool for identifying emperor fish (Lethrinidae) larvae and juveniles

Geometric morphometrics as a tool for identifying emperor fish (Lethrinidae) larvae and juveniles

Source :

Descripteurs français

English descriptors

Abstract

Links toward previous steps (curation, corpus...)

Le document en format XML

Pour manipuler ce document sous Unix (Dilib)

Pour mettre un lien sur cette page dans le réseau Wicri

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