The replacement of fish oil with refined coconut oil in the diet of large rainbow trout (<i>Oncorhynchus mykiss</i>)

Ballestrazzi, Rodolfo; Rainis, Simona; Maxia, Marco

doi:10.4081/ijas.2006.155

Cited by 24 publications

(20 citation statements)

References 21 publications

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“…These findings are in agreement with previous investigations of CO [40], PO [41,42], and LO [43], as well as the well-established paradigm of compositional plasticity of fish tissues with respect to FA profile. Finishing augments fillet nutritional quality among fishes raised on feeds containing FO alternatives [26][27][28][29][30][31][32][33][34]; however, complete restoration of FO-associated FA profile, specifically LC-PUFA content, is rarely observed [31][32][33][34].…”

Section: Discussionsupporting

confidence: 94%

Fatty Acid Profile of Sunshine Bass: I. Profile Change is Affected by Initial Composition and Differs Among Tissues

Trushenski

Lewis

Kohler

2008

Lipids

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Fatty acid (FA) composition of fillet tissue can be tailored by transitioning fish from alternative lipid-based, low long-chain polyunsaturated fatty acid (LC-PUFA) grow-out feeds to high LC-PUFA "finishing" feeds. To address whether grow-out feed composition influences the responsiveness of fillet tissue to finishing, sunshine bass (SB, Morone chrysops x M. saxatilis) were reared to a submarketable size on grow-out feeds containing fish oil (FO) or a 50:50 blend of FO and coconut (CO), grapeseed (GO), linseed (LO), or poultry (PO) oil. For the final 8 weeks of the trial, fish were either maintained on assigned grow-out feeds or finished with the 100% FO feed. Production performance was unaffected by dietary lipid source, but fillet FA profile generally conformed to nutritional history. Regardless of grow-out regimen, finishing had a significant restorative effect on fillet FA composition; however, complete restoration of control levels of 20:5n-3, 22:6n-3, total LC-PUFA and n-3:n-6 FA ratio was achieved only among fish fed the CO-based grow-out feed. Saturated fatty acids (SFA) appear to be preferential catabolic substrates, whereas medium-chain and long-chain PUFA are selectively deposited in tissues. Provision of SFA in grow-out feeds appears to optimize selective FA metabolism and restoration of beneficial fillet FA profile during finishing.

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Section: Discussionsupporting

confidence: 94%

Fatty Acid Profile of Sunshine Bass: I. Profile Change is Affected by Initial Composition and Differs Among Tissues

Trushenski

Lewis

Kohler

2008

Lipids

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“…The lipid quality indexes were similar to those reported by Poli et al (2003) for the meagre and by Rondan et al (2004) and Ballestrazzi et al (2006) for other fish species and to those of other foodstuffs which are advisable for human consumption (Peres-Llamas et al, 1998).…”

Section: Resultssupporting

confidence: 88%

“…However, for group A, the incidence of the fillet fat was very low as well, confirming that the name meagre of this species is perfectly appropriate. The raised meagre showed fat contents (about 3%) of fillets not very different from those of the wild caught fish and, from this point of view, is very different from the other species (in particular sea bass, gilthead sea bream and trout), in which higher percentages of fat (from 2 to 5 times) occur (Orban et al, 1996;Lanari et al, 1999;Orban et al, 1999;Poli et al, 2001;Ballestrazzi et al, 2006). The low incidence of fat in the fillet of group A, fed a diet at 20.7% of fat, suggests that the use of diets with a progressive increase in fat levels is possible without wors- Confirming what has already been stated, the protein content was similar for both groups (21.09 and 20.89%, respectively for groups A and B).…”

Section: Resultsmentioning

confidence: 95%

Effect of two different protein/fat ratios of the diet on meagre (Argyrosomus regius) traits

Piccolo

Bovera

Riu

et al. 2008

Italian Journal of Animal Science

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The aim of this study was to evaluate the effect of two diets with different protein/fat ratios (P/F) (diet A: P/F 2.26; diet B: P/F 3.36) on the chemical composition, fatty acid profile and some somatic indexes of meagre (Argyrosomus regius). The trial was carried out on two groups of meagre raised in two different sea cages during 15 months. At the end of the production cycle biometric measures as well as chemical-nutritional analysis of the fillets were conducted on 25 fishes per group. Diet A, with a lower P/F, furnished animals with higher percentages of mesenteric fat (0.48 vs 0.41%; P<0.01) and of fillet yield (51.21 vs 48.12; P<0.01). Moreover, the fillets obtained with the diet A showed higher percentage of fat (3.60 vs 2.41%; P< 0.01), lower moisture (74.10 vs 75.42%; P<0.01), lower losses of water under pressure (16.73 vs 20.20%; P<0.01) and after 48 h of refrigeration (3.08 vs 4.23%; P<0.01). The fatty acids profile of fillets was affected by the diet. Diet A resulted in a higher level of saturated fatty acids (26.44 vs 23.17% of total lipid; P<0.01) and a lower percentage of polyunsaturated fatty acids (31.56 vs 36.08%; P<0.01) in the fillet, mainly due to the lower content of linoleic acid (13.63 vs 19.77%; P<0.01). The atherogenic (AI) and thrombogenic (TI) indexes, which resulted very low in the fish of Group B (AI=0.48 vs 0.60, P<0.01; TI=0.33 vs 0.37, P<0.01), together with the low lipid content of meat in both groups, confirmed the very high nutritional quality of meagre fillets.

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“…The reasons for the differences between fed and retained fatty acid levels are unclear as trout appear to have limited ability to elongate and desaturate dietary fatty acids into DHA (Hardy 2002). Other researchers have reported similar results with similar fatty acid sources (Ballestrazzi et al 2006).…”

Section: Discussionsupporting

confidence: 80%

“…Medium chain‐length saturated fatty acids supplied through coconut oil (43% lauric acid) have been shown to be viable energy sources for many fish species including red drum, Sciaenops ocellatus; African catfish, Heterobranchus lonifilis ; and common carp, Cyprinus carpio L. (Craig and Gatlin 1995; Legendre et al 1995; Fontagné et al 1999). More recently, Ballestrazzi et al (2006) reported that rainbow trout fed up to 13% coconut oil as a replacement for fish oil maintain growth performance when fish meal levels were maintained at 23%. Olsen et al (1998) reported that, in Arctic charr, Salvelinus alpinus , the lauric acid present in coconut oil was more efficiently absorbed than other longer saturated fatty acids in the pyloric caeca and gut.…”

Section: Discussionmentioning

confidence: 99%

Sensory Analysis of Rainbow Trout, Oncorhynchus mykiss, Fed Enriched Black Soldier Fly Prepupae, Hermetia illucens

Sealey

Gaylord²,

Barrows³

et al. 2011

J World Aquaculture Soc

293

195

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A growth trial and fillet sensory analysis were conducted to examine the effects of replacing dietary fish meal with black soldier fly (BSF) prepupae, Hermetia illucens, in rainbow trout, Oncorhynchus mykiss. A practical‐type trout diet was formulated to contain 45% protein; four test diets were developed by substituting 25 and 50% of the fish meal with normal (BSF) or fish offal‐enriched black soldier fly (EBSF) prepupae. Dietary fat was adjusted to approximately 20% lipid using fish oil and poultry fat. Diets were fed to three replicate tanks of fish per treatment (10 fish/tank) for 8 wk. After the trial, three fish per tank were sampled for determination of hepatosomatic index, intraperitoneal fat ratio and muscle ratio, and muscle proximate and fatty acid composition. Fish remaining after sampling were used for sensory evaluation. Growth of fish fed the EBSF diets was not significantly different from those fish fed the fish meal‐based control diet, while the growth of fish fed the BSF diets was significantly reduced as compared to the control diet. A group of 30 untrained panelists did not detect a significant difference in a blind comparison of fish fed the fish meal containing control diet as compared to fish fed the EBSF or BSF diets.

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The replacement of fish oil with refined coconut oil in the diet of large rainbow trout (Oncorhynchus mykiss)

Cited by 24 publications

References 21 publications

Fatty Acid Profile of Sunshine Bass: I. Profile Change is Affected by Initial Composition and Differs Among Tissues

Fatty Acid Profile of Sunshine Bass: I. Profile Change is Affected by Initial Composition and Differs Among Tissues

Effect of two different protein/fat ratios of the diet on meagre (Argyrosomus regius) traits

Sensory Analysis of Rainbow Trout, Oncorhynchus mykiss, Fed Enriched Black Soldier Fly Prepupae, Hermetia illucens

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