&lt;b&gt;Supplementation with microencapsulated lemongrass essential oil improves protein deposition and carcass yield in silver catfish (&lt;i&gt;Rhamdia quelen&lt;/i&gt;)

Cristine Rampelotto,Joseânia Salbego,Carlos Garrido Pinheiro,Leila Picolli Da Silva,Tatiana Emanuelli,Joziane Soares De Lima

doi:10.4025/actascianimsci.v40i0.36517

<b>Supplementation with microencapsulated lemongrass essential oil improves protein deposition and carcass yield in silver catfish (<i>Rhamdia quelen</i>)

Cristine Rampelotto, Joseânia Salbego + Show 4 more

Open Access

https://doi.org/10.4025/actascianimsci.v40i0.36517

Copy DOI

Abstract

The aim of this study was to investigate the effect of dietary supplementation with Cymbopogon flexuosus essential oil (EO) on productive performance, metabolic parameters and body and fillet composition of adult silver catfish, Rhamdia quelen. Total length, condition factor, weight gain, specific growth rate, hepatosomatic index, visceral fat content and fillet composition were not affected by EO supplementation. Plasma total protein, globulin and triglycerides were reduced by EO supplementation. Supplementation with 1 mL EO kg -1 diet increased carcass yield and protein deposition in the carcass, while reducing gonadosomatic index and fat deposition in the carcass when compared to control group. In addition, 1 mL EO kg -1 diet also improved feed intake when compared to 3 mL EO kg -1 diet. Our results suggest that EO up to 1 mL kg -1 diet can be used in fish feed to improve protein deposition and carcass yield of silver catfish.

Highlights

Aquaculture plays an important role in economic and social development as it provides high biological value food for human nutrition and generates job opportunities that contribute to economic growth (Subasinghe, Soto, & Jia, 2009)
The aim of this study was to investigate the effect of dietary supplementation with microencapsulated essential oil (EO) from C. flexuosus on productive performance, metabolic parameters and body composition of adult silver catfish
The EO chemical constituents were identified by comparison of their retention indices, which were determined by a calibration curve of n-alkanes injected under the same chromatographic conditions as the samples and mass fragmentation patterns described in the literature (Garlet et al, 2016)

Summary

Introduction

Aquaculture plays an important role in economic and social development as it provides high biological value food for human nutrition and generates job opportunities that contribute to economic growth (Subasinghe, Soto, & Jia, 2009). Catfish (Siluriformes) comprises numerous fish species, mostly freshwater fish (Ferraris, 2007), widely distributed with a key role in world aquaculture (The World Bank, 2013). Rhamdia quelen, is endemic from southern Mexico to central Argentina (Valladão, Gallani, & Oilarski, 2016). This freshwater species is well adapted to the low winter temperatures in southern Brazil (Garcia, Copatti, Wachholz, Pereira Filho, & Baldisserotto, 2008), being a valuable species for aquaculture in temperate climate. Plant extracts and derivatives, including essential oils (EOs), emerged as an alternative to antibiotics and chemotherapy in aquaculture since they have antimicrobial activity and stimulate fish immunity (Vaseeharan & Thaya, 2013).

Objectives

Methods

Results

Conclusion