Journal of Aquaculture Research & Development

Discordance in the identification of juvenile pink shrimp (Farfantepenaeus brasiliensis and F. paulensis: family Penaeidae): An integrative approach using morphology, morphometry and barcoding

4^th International Conference on Fisheries & Aquaculture

November 28-30, 2016 San Antonio, USA

Sarah de Souza Alves Teodoro

University of São Paulo, Brazil

Posters & Accepted Abstracts: J Aquac Res Development

Abstract:

Differences in width and/or shape of the dorsal furrow on pleonite six has traditionally been the primary character used to discriminate the coexistent commercial pink shrimps Farfantepenaeus brasiliensis and F. Paulensis. During juvenile stage, however, discrimination is unreliable.We aimed to test the hypothesis that taxonomic morphological characteristics traditionally used to discriminate these species were not effective for juveniles. Molecular analyses (COI gene) showed that traditional characteristics did not allow for the correct identification of juveniles of these species. Only 64% of juveniles identified a priori based on traditional morphological traits and subsequently verified molecularly were identified correctly. After molecular identification, we searched for new morphological traits that could be used for reliable identification of juvenile and adult stages using morphometry and comparative morphology. We identified a new morphological trait that will aid in the discrimination of juveniles of F. brasiliensis and F. paulensis. Contrary to our expectations, the characters identified by morphometricanalysis were subtle and difficult to apply in field identification situations. When analyzing the external morphology of juveniles, it was possible to identify differences between the species in the anterior margin of gastrofrontal carina in relation to the rostrum teeth. In addition to corroborating the difficulty in identifying these two species, our study confirms the importance of the association between molecular and comparative morphology analyses in a fisheries and biodiversity context. Furthermore, we extended the geographic distribution of F. subtilis through a new record from the southern coast of São Paulo State.

Biography :

Email: sarahteodoro@gmail.com