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Shrimp

 

The Decapoda are an order of crustaceans that includes different familiar groups, such as crayfish, crabs, lobsters, prawns and shrimps. The two latter groups, belonging to many families (Palaemonidae, Pandalidae, Penaeidae, Solenoceridae), have been exploited both for fishery and farming and represent the most important species by an economical point of view. Nowadays, in addition to these common species, others are continuously placed on the market mainly by the Asian countries. The extraordinary morphological diversity opens challenges to their phylogenetic study and represents a limit for their identification. Moreover, considering that they are often sold in form of fresh, frozen cooked or in brine, usually without the head and shell, the possibility to rely the identification on the morphological characters is almost impossible. In this kind of prepared or processed product the possibility that a high priced species could be substituted with a less valuable one is extremely high. Some attempts have been already performed to solve the phylogeny of some species using different molecular markers. In particular, the mitochondrial genes 16S ribosomal RNA (16rRNA) and cytochrome oxidase subunit 1 (COI), and the nuclear ones, such as the phosphoenolpyruvate carboxykinase (PEPCK) and sodium–potassium ATPase a-subunit (NaK), have been used to construct the phylogeny of the decapods. The aim of this project is to verify the discriminating power of these genes for the species commercialized on the European market and to develop a method able to allow the molecular identification of prawns and shrimps species. Once validated this method could represent a valid analytical support to the activities of the Official agencies.

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(Italiano) Report Oceana 2016

(Italiano) Report Oceana 2016

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