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- W2346716877 abstract "The family Loliginidae comprises about 47 species worldwide. Despite not being very diverse, there are problems with this family’s systematics, including a lack of taxonomic stabilization at higher levels and problems at species level. This type of problem with its systematics is found off the Pacific Mexican coast, where the number of loliginid species present in the region is uncertain, and species identification is complex with high character overlap. Loliginids are caught in trawl nets and there are no fishery records by species, complicating the adequate management of this resource, which has high fisheries potential for the country. A revision guaranteeing the correct species identification was therefore necessary. In this study we carried out morphologic and morphometric (traditional and geometric) reviews, and molecular analyses of the species from the Loliginidae family found off the Mexican Pacific coast. A total of 602 organisms were examined; 476 were caught in the shrimp trawl fishery off the Mexican Pacific coast, and 126 organisms were obtained from the collection of the Natural History Museum in Santa Barbara (these last specimens were not included in the geometric morphometrics and genetic analyses). The morphological description was done by analyzing the siphon and hectocotylus shape in males. For traditional morphometrics, 16 body measurements of 530 organisms were taken; these measurements were evaluated through discriminant analysis. A total of 179 left statoliths were extracted and analyzed by geometric morphometrics, using the Procrustes procedure. Values were analyzed with multivariate statistics. Genetic analyses on 173 organisms were carried out using a mitochondrial gene fragment of the cytochrome c oxydase Subunit 1 (COI). Through morphological analyses six different shapes of the siphon were identified, corresponding to Lolliguncula panamensis, L. argus, L. diomedeae, Doryteuthis opalescens, and to two forms designated as Lolliguncula sp. 1 and Lolliguncula sp. 2. Only five species were discriminated using the morphometrics analysis based on body measurements. Lolliguncula sp. strongly overlapped with L. diomedeae. The geometric morphometrics analysis separated the four species with 100% correct classification, which makes the efficiency of statoliths in the discrimination of these species evident. According to the phylogenetic analyses carried out in this study, Lolliguncula argus had a higher affinity with Doryteuthis opalescens. We therefore propose that L. argus species be incorporated into the Doryteuthis genus. Finally, we confirmed the presence of four loliginid species previously reported for the area: Lolliguncula panamensis, L. diomedeae, Doryteuthis opalescens, and D. argus, besides one species not yet described for the Mexican Pacific coast." @default.
- W2346716877 created "2016-06-24" @default.
- W2346716877 creator A5048067705 @default.
- W2346716877 date "2013-06-25" @default.
- W2346716877 modified "2023-09-24" @default.
- W2346716877 title "Taxonomía de calamares de la familia loliginidae en el Pacífico mexicano" @default.
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- W2346716877 hasPublicationYear "2013" @default.
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