Proximal composition and fatty acid profile of Hemigrapsus crenulatus (H. Milne Edwards, 1837) as one of the main foods of "patagonian blenny"Eleginops maclovinus (Cuvier, 1830).

G Figueroa-Muñoz,L Vargas-Chacoff,P De Los Ríos-Escalante,C Esse,C Toledo,R Vega-Aguayo,R Oyarzún,P Dantagnan

doi:10.1590/1519-6984.231834

Abstract

The Patagonian blenny (Eleginops maclovinus) is species endemic to South America with physiological characteristics that would facilitate its incorporation into Chilean aquaculture. However, there is currently no specific artificial food that can be used to raise E. maclovinus. In light of this problem, this study describes the proximal composition and fatty acid profile of the crab Hemigrapsus crenulatus, one of the main foods of E. maclovinus. The purpose of the study is to serve as basic information for the development of a specific artificial diet for juveniles of this fish species. The proximal analysis of the complete body of H. crenulatus indicates that it is mainly composed of ash (35.9%), proteins (32.2%), glucides (19.8%) and minor lipids (3.6%). The fatty acid profile is 40.7% PUFAs, 29.7% MUFAs and 29.5% SAFAs, and the most abundant acids are Eicosapentaenoic (18.8%), Oleic (6.8%) and Palmitic (16.6%), respectively. H. crenulatus has highest level of proteins, lipids and PUFAs among the species of the Brachyura infraorder.

Highlights

Chile is undergoing an aquaculture diversification process that has led to increased public and government interest in promoting the development of aquaculture of native species with the potential for cultivation (Sa et al, 2014) such as Eleginops maclovinus (Cuvier, 1830)
The aim of this study is to describe the proximal composition and fatty acid profile of the crab H. crenulatus in order to contribute to research on its nutrition and potentially to develop of artificial diet to E. maclovinus diet
H. crenulatus has been described as prey of Eleginops maclovinus (Cuvier, 1830) in studies conducted in Chile in the estuary of the Valdivia River (Table 3)

Summary

Introduction

Chile is undergoing an aquaculture diversification process that has led to increased public and government interest in promoting the development of aquaculture of native species with the potential for cultivation (Sa et al, 2014) such as Eleginops maclovinus (Cuvier, 1830). Its geographic distribution ranges are from the mouth of the Plata River to the extreme south of South America on the Atlantic Coast, including the Falkland Islands, and from there to Valparaíso on the Pacific Coast (Gacitúa et al, 2008). It can be found in environments with different levels of salinity, including the open sea, coastal waters, estuaries and freshwater rivers (Pequeño, 1979; Vargas-Chacoff et al, 2016). It has been described as the exclusive prey of the fish (Figueroa-Muñoz and De Los Ríos, 2018)

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