Abstract
The proximal composition, amino acids and fatty acid profile were determined in whole body of wild and captive southern hake (Merluccius australis) in order to evaluate the differences in nutrients content due to the nutritional quality of the feed consumed during broodstock conditioning of this species. Body composition of southern hake did not show significant differences in dry matter, protein or ash content between both studied groups. Conversely, lipid content was significantly higher in the whole body of captive fish compared to the wild fish. In addition, the concentration of linoleic, docosahexaenoic and eicosapentaenoic acids, showed significantly higher level in captive hake than the wild hake. Amino acids concentrations did not vary between fish, except threonine and taurine. Threonine concentration was higher in wild hake whereas taurine concentration was higher in captive hake. The results of this comparative study provide a better understanding of the effects of supplemented feed currently used to acclimate and maintain in captivity southern hake broodstock.
Highlights
Chilean aquaculture is poorly diversified and reliant mostly on the farming of salmonids (Wurmann 2007, Niklitschek et al 2013)
The results achieved in this study prove that feeding southern hake intensively with supplemented feed during captivity did not lead to significant changes in the proximate composition of whole body as compared to wild fish, except lipid content which increased
Similar findings related to an increase of muscle fat content in farmed fish as compared to wild fish have been reported in Oncorhynchus mykiss (Fallah et al 2011), Salmo salar (Johnston et al 2006), Esox lucius (Jankowska et al 2008), Solea senegalensis (Norambuena et al 2012), Sparus aurata (Sağglık et al 2003), Perca flavescens (Gonzalez et al 2006) Leiocassis longirostris (Wang et al 2012) and Dicentrarchus labrax (Alasalvar et al 2002) as result of the application of commercial feed
Summary
Chilean aquaculture is poorly diversified and reliant mostly on the farming of salmonids (Wurmann 2007, Niklitschek et al 2013). Among the native species considered to diversify Chilean aquaculture, Southern hake (Merluccius australis) has been selected as one of the important candidate species for farming (Bustos & Landaeta 2005, Bustos et al 2007a). Southern hake is a demersal species distributed in Chilean, Argentinean and New Zealand waters (Bustos et al 2007b). This fish species reaches an average length of 65 cm and lives around 30 years (Aguayo-Hernández 1995, Colman 1995, Tingley et al 1995). In Chilean coast, M. australis feeds on squids, fishes, crustaceans and benthonic organisms (Aguayo-Hernández 1995)
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
