Occurrence of Emphasis Type="Italic"Octopus insu

Authors: Françoise D Lima Waldir M BerbelFilho Tatiana S Leite Carlos Rosas Sergio M Q Lima

Publish Date: 2017/02/03

Volume: 47, Issue: 3, Pages: 723-734

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Abstract

The genus Octopus has been treated as a “catch all” taxon because many species have morphological similarities To investigate the taxonomic status of the Octopus species in the Tropical Northwestern Atlantic TNA and the Tropical Southwestern Atlantic TSA we sampled Octopus insularis Leite and Haimovici 2008 in three areas of the northeastern Brazilian coast four Brazilian oceanic islands and one island in Western Caribbean Mexico Samples of Octopus maya Voss and Solís 1966 were obtained from the cultivation center of the Universidad Nacional Autónoma de México UNAM in Sisal city Specimens previously identified as Octopus vulgaris Cuvier 1797 were collected in two regions of southeast Brazil in an industrial port in Progreso city southern Gulf of Mexico and from a fish market in Isla Mujeres Mexico Western Caribbean Molecular species attribution was completed based on morphology of fresh specimens identified by an octopus specialist and then checked against previous identification cultivation center and GenBank sequences Molecular analysis of both mitochondrial cytochrome oxidase I and nuclear genes elongation factor1α including GenBank data confirmed that one specimen collected at the Western Caribbean from Mexico and identified as O insularis shared the same haplotype of the species from the type locality indicating the occurrence of this species in the Caribbean Sea Phylogenetic analyses indicated that 21 GenBank sequences from TNA identified as O vulgaris grouped within the O insularis clade and are most likely to be to the latter species The COI analysis also showed that 18 individuals collected in fishing landings and fish markets previously identified as O vulgaris had the identical haplotype of O maya collected in the UNAM cultivation center These results corroborate the misidentification of species in Mexican fisheries Based on molecular and morphological data we extended the distribution of O insularis to the TNA and revealed cases of misidentification among the most commercially exploited octopus species in this regionWe are thankful to the Chico Mendes Institute for Biodiversity Conservation MMA/ICMBIO and the Brazilian Navy for logistics support in the field work We thank the Brazilian National Research Council CNPq 481492/20139 and Coordination for the Improvement of Higher Education Personnel CAPES 23038004807/201401 for financial support and research grant FD WMBF receives a PhD grant from Science without Borders Program/CNPq process 233161/20147 We are grateful to Dr Jan Strugnell for reviewing an earlier version of this manuscript We would also like to thank Nikeisha Caruana and Adam Amato for reviewing the English grammar

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