Full-fat soya for rainbow trout (Oncorhynchus mykiss) in freshwater: Effects on performance, composition and flesh fatty acid profile in absence of hind-gut enteritis

Morris, P C; Gallimore, Phillip H.; Handley, J.; Hide, G.; Haughton, P.; Black, Alan

doi:10.1016/j.aquaculture.2005.04.021

Cited by 47 publications

(34 citation statements)

References 58 publications

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“…The inclusion of plant proteins (rich in n6 fatty acids) in diets for rainbow trout causes a decreased level of long-chain fatty acids (EPA and DHA) and an increase in unsaturated 18-C fatty acids (oleic acid, linoleic acid and linolenic acid) in the tissues of rainbow trout (Gomes et al 1993;De Francesco et al 2004;Morris et al 2005). The above was also observed in the present study between the control diet and the diets containing whole lupin grain.…”

Section: Discussionsupporting

confidence: 82%

Feeding high inclusion of whole grain white lupin (Lupinus albus) to rainbow trout (Oncorhynchus mykiss): effects on growth, nutrient digestibility, liver and intestine histology and muscle fatty acid composition

Bórquez

Serrano

Dantagnan

et al. 2010

Aquaculture Research

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The e¡ect of dietary inclusion of whole grain white lupin (Lupinus albus) on growth performance, histology, muscle fatty acid composition and nutrient digestibility was investigated in an 11-week growth and a 4-week digestibility trial with rainbow trout (initial body weight of 54.0 AE 6.2 and 181.9 AE 3.4 g respectively). Four experimental extruded diets were formulated to contain 0%, 30%, 40% and 50% of whole grain lupin and fed to triplicate groups of ¢sh twice a day until apparent satiation. Faeces were collected daily from each digestibility tank by decantation. No signi¢cant trends were observed with respect to growth, feed utilization, apparent digestibility coe⁄cients or whole-body composition (P40.05). Conversely, increasing levels of dietary lupin led to signi¢cant decreases in the Hepatosomatic index (R 2 50.75, Po0.05) and slight lipid in¢ltration into hepatocytes and enterocytes. Muscle fatty acid compositions were slightly a¡ected by the dietary treatment. Polynomial regression of dietary inclusion of lupin and muscle fatty acid concentrations showed an increase in C18:1n-9, C18:2n-6 and C18:3n-3 and a decrease in C20:5n-3 with increasing dietary lupin level. These results demonstrated that whole grain lupin can be included up to 50% in commercial rainbow trout diets without negative e¡ects.

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Section: Discussionsupporting

confidence: 82%

Feeding high inclusion of whole grain white lupin (Lupinus albus) to rainbow trout (Oncorhynchus mykiss): effects on growth, nutrient digestibility, liver and intestine histology and muscle fatty acid composition

Bórquez

Serrano

Dantagnan

et al. 2010

Aquaculture Research

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“…The increase of goblet cells, mainly in the distal intestine, can be related with a mechanical irritation caused by the presence of calcareous ossicles in sea cucumber meal. Similarly to previous researches where absence of inflammation was recorded (Morris et al, 2005), in this study, lamina propria, subepithelial mucosa and mucosa folds did not change in the experimental treatments, thus confirming the absence of inflammation. The main results obtained in this research indicate that this sea cucumber meal could be used in future fish feeds.…”

Section: Discussionsupporting

confidence: 90%

“…The semi-quantitative index has been based on Morris et al (2005) index and six parameters of enteritis were quantified independently, according to: 1) the appearance and length of the mucosa folds (PM); 2) the presence and size of supranuclear vacuoles (VSN); 3) number and position of goblet cells (CCM); 4) the degree of infiltration abundance and of eosinophilic granulocytes into the lamina propria and into the sub-epithelial mucosa (EG); 5) the degree of widening of the lamina propria (LP); 6) the degree of thickening of the sub-epithelial mucosa (SM). Each of these parameters was scored on a scale from 1 to 5.…”

Section: Semi-quantitative Methodsmentioning

confidence: 99%

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Franco¹,

Sicuro²,

Karine³

et al. 2015

Turk. J. Fish. Aquat. Sci.

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Sea cucumber meal is proposed as ingredient for rainbow trout diet using an histological approach. Three isoproteic (crude protein 39.5%) and isoenergetic (18 MJ/kg DM) diets were formulated with increasing level of sea cucumber meal (FO10, FO15 and FO20; with an inclusion of 10, 15 and 20% of sea cucumber meal), these diets were tested against a fish meal based diet (FP). A monofactiorial balanced experimental design (3 x 4) was adopted. 48 trout, (110±7.5 g) of initial fish body weight, were utilized. The fish feed trial lasted in 49 days. At the end of experiment, histological sections of intestine and liver were sampled. All the tissue samples were stained with the Mayer hematoxylin-eosin (HE) stain while on the liver samples PAS, PAS diastase and Alcian Blue stains were carried out. The enteritis score showed a slight enteritis status in fish fed with sea cucumber meal, independently from inclusion level (FP: 6.13±0.35; FO10: 7.0±1.6; FO15: 7.38±1.77; FO20: 7.88±1.89). The inclusion of sea cucumber meal did not cause relevant histological changes in the intestine of rainbow trout, thus showing positive perspectives for its future utilization in fish feeds.

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“…A level of inclusion of 48% of total protein as maize gluten in high-protein diets for small salmon did not effect growth rates (Mente et al 2003). Mundheim et al (2004) found that up to 50% of total protein in fish feed for salmon can be of vegetable origin, and Morris et al (2005) showed that in diets for rainbow trout, full-fat soybean meal could be included, providing 21% of the dietary crude protein without significant adverse effects on growth rate and survival.…”

Section: Introductionmentioning

confidence: 99%

The red alga Porphyra dioica as a fish-feed ingredient for rainbow trout (Oncorhynchus mykiss): effects on growth, feed efficiency, and carcass composition

et al. 2009

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Porphyra dioica meal was added at levels of 5, 10 and 15% to a diet for rainbow trout formulated to be isonitrogenous and isolipidic. The control diet was a commercial trout diet without seaweed meal. The experimental groups were fed in triplicate for 12.5 weeks, during which fish weight increased on average from 107-261 g. Seaweed meal inclusion did not affect significantly weight gain (WG), specific growth rate (SGR), feed efficiency (FE), protein efficiency ratio (PER) and apparent digestibility coefficient of the dry matter (ADC dm ) for any of the diets. Voluntary feed intake (VFI) increased for all seaweed diets compared to the control diet but not significantly (P>0.05). Final weight (FW) was significantly smaller for the 15% P. dioica inclusion and hepatosomatic index (HSI) for the 10% and 15% inclusion. Carcass protein content increased for all three experimental diets, and was significantly higher for the diet with 10% seaweed inclusion. Rainbow trout fed with Porphyra meal presented a dark orange pigmentation of the flesh at the end of the trial, compared to the whitish color from the control fish. These results suggest that P. dioica can effectively be included in diets for rainbow trout up to 10% without significant negative effects on weight gain and growth performance. The pigmentation effect of the fish flesh by adding P. dioica meal to the feed is of a considerable interest to the organic salmon-farming industry.

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Full-fat soya for rainbow trout (Oncorhynchus mykiss) in freshwater: Effects on performance, composition and flesh fatty acid profile in absence of hind-gut enteritis

Cited by 47 publications

References 58 publications

Feeding high inclusion of whole grain white lupin (Lupinus albus) to rainbow trout (Oncorhynchus mykiss): effects on growth, nutrient digestibility, liver and intestine histology and muscle fatty acid composition

Feeding high inclusion of whole grain white lupin (Lupinus albus) to rainbow trout (Oncorhynchus mykiss): effects on growth, nutrient digestibility, liver and intestine histology and muscle fatty acid composition

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The red alga Porphyra dioica as a fish-feed ingredient for rainbow trout (Oncorhynchus mykiss): effects on growth, feed efficiency, and carcass composition

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