Effects of dietary lipid levels on growth, feed utilization and mitochondrial function in low- and high-feed efficient families of rainbow trout (Oncorhynchus mykiss)

Eya, Jonathan C.; Yossa, Rodrigue; Ashame, Martha F.; Pomeroy, Charles F.; Gannam, Ann L.

doi:10.1016/j.aquaculture.2013.08.022

Cited by 27 publications

(19 citation statements)

References 53 publications

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“…Consistently with this good function of mitochondria, all fish in this study had an appropriate K which was >1·4, although the K of the group of fish fed diets 42/20 and 42/30 was higher than those fed diet 42/10. In agreement with the higher K obtained with diets 42/20 and 42/30, it was found in a study conducted in parallel to this experiment that fish fed these diets had higher growth and feed efficiency, coupled with a lower daily feed consumption (FC), than fish fed diet 42/10 (Eya et al , ). Additionally, with similar FC, the high‐FE family (F129) showed higher growth and feed efficiency than low‐FE family F134 as was expected with the genetic selection programme (Eya et al , ).…”

Section: Discussionsupporting

confidence: 87%

“…In agreement with the higher K obtained with diets 42/20 and 42/30, it was found in a study conducted in parallel to this experiment that fish fed these diets had higher growth and feed efficiency, coupled with a lower daily feed consumption (FC), than fish fed diet 42/10 (Eya et al , ). Additionally, with similar FC, the high‐FE family (F129) showed higher growth and feed efficiency than low‐FE family F134 as was expected with the genetic selection programme (Eya et al , ). Therefore, 20% dietary fat can be considered adequate for good growth and condition in O. mykiss (Cho & Kaushik, ), while 30% dietary fat can be considered as excessive.…”

Section: Discussionsupporting

confidence: 87%

“…All ingredients were supplied by Rangen (http://www.rangen.com). The diet preparation was described in detail by Eya et al (). Each diet was randomly assigned to triplicate tanks holding fish from the same family, for a total of nine tanks per family, for 108 days.…”

Section: Methodsmentioning

confidence: 99%

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Effects of dietary lipid levels on mitochondrial gene expression in low and high‐feed efficient families of rainbow trout Oncorhynchus mykiss

Eya

Yossa

Ashame

et al. 2014

Journal of Fish Biology

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A 2 × 3 factorial study was conducted to evaluate the effects of dietary lipid level on mitochondrial gene expression in mixed sex rainbow trout Oncorhynchus mykiss. Practical diets with a fixed crude protein content of 42%, formulated to contain 10% (42/10), 20% (42/20) and 30% (42/30) dietary lipid, were fed to triplicate groups of either low-feed efficient (F129; mean ± s.d. = 105.67 ± 3.04 g initial average mass) or high-feed efficient (F134; mean ± s.d. = 97.86 ± 4.02 g) families of fish, to apparent satiety, twice per day, for 108 days. At the end of the experiment, diets 42/20 and 42/30 led to similar fish condition factors, which were higher than that observed with diet 42/10 (P < 0.05). F134 fish fed diet 42/10 showed the highest hepato-somatic index, while there was no significant difference among all the other treatments (P < 0.05). When the group of F134 fish fed diet 42/10 was used as the calibrator for gene expression analysis, the five genes selected for their involvement in lipid metabolism (complex I-nd1, complex III-cytb, complex IV-cox1, complex IV-cox2 and complex V-atp6) were up-regulated in the muscle and down-regulated in both the liver and the intestine. There was a significant family × diet interaction regarding nd1, cox2 and atp6 in the liver; nd1, cytb, cox1, cox2 and atp6 in the intestine, and nd1, cytb, cox1, cox2 and atp6 in the muscle (P < 0.05). The overall results of this study constitute basic information for the understanding of molecular mechanisms of lipid metabolism at the mitochondrial level in fishes.

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Section: Discussionsupporting

confidence: 87%

Section: Discussionsupporting

confidence: 87%

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Effects of dietary lipid levels on mitochondrial gene expression in low and high‐feed efficient families of rainbow trout Oncorhynchus mykiss

Eya

Yossa

Ashame

et al. 2014

Journal of Fish Biology

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“…The dietary lipid levels strongly affected HSI, VSI and IPF, whereas CF remained unchanged. Eya, Rodrigue Yoss, Ashame, Pomeroy, and Gannam () found similar results in rainbow trout with increasing dietary lipids (100–300 g/kg). Increasing dietary lipid above the minimum level will support higher growth rates, possibly partly based on protein sparing, towards an upper limit where excess lipid leads to unwanted deposition of lipid in the peritoneal cavity, liver or other tissues (Borges et al., ; Craig, Washburn, & Gatlin, ; González‐Félix et al., ; Jobling, Koskela, & Savolainen, ; NRC, ).…”

Section: Discussionmentioning

confidence: 59%

“…Increasing dietary lipid resulted in a trend of higher content of lipid in whole body, muscle, liver and viscera of the Manchurian trout as was found in other salmonids, such as S. trutta (Arzel et al., ), S. salar (Hemre & Sandnes, ), O. mykiss (Eya et al., ; Takeuchi et al., ) and H. taimen (Xu et al., ), as well as for fishes belonging to other families, such as S. ocellatus (Craig et al., ), Paralichthys olivaceus (Lee, Cho, & Kim, ), S. senegalensis (Borges et al., ), Epinephelus malabaricus (Li et al., ). Interestingly, although the lipid content of muscle and liver of the Manchurian trout tended to increase with the increased dietary lipid levels up to 190 g/kg, dietary lipid contents higher than 190 g/kg did not result in further significant increases in muscle and liver lipid.…”

Section: Discussionmentioning

confidence: 81%

Effects of dietary lipid levels on growth, feed utilization, digestive tract enzyme activity and lipid deposition of juvenile Manchurian trout,Brachymystax lenok(Pallas)

et al. 2017

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Six isoproteic diets were designated to evaluate the effects of dietary lipid levels (from 70 to 270 g/kg) on the growth performance, feed utilization, digestive tract enzyme activity and lipid deposition of juvenile Brachymystax lenok (average initial weight 0.54 ± 0.04 g). Each diet was fed to triplicate tanks (30 fish per tank) in an indoor closed recirculating system for 9 weeks. Final body weight and weight gain were highest in fish fed 190 g/kg diet and lowest in fish fed the 70 g/kg diet. Specific growth rate of fish fed with 190 g/kg diet was significantly higher than those fed with 70 and 270 g/kg diets (p < .05). Protein efficiency ratio of fish fed with 70 g/kg diet was significantly lower than the 110-230 g/kg treatments and was not significantly different from the 270 g/kg treatment. Fish fed with 270 g/kg diet had significantly higher hepatosomatic index and viscerosomatic index than those fed with 70-190 g/kg diets (p < .05). Intraperitoneal fat ratio and the whole-body lipid content had a trend to increase with increase in dietary lipid level. Muscle crude lipid content increased up to 190 g/kg with increase in dietary lipid level. Lipid retention decreased with increase in dietary lipid level, while no significant differences in protein intake and retention levels were observed in fish among all treatments. Lipase activity of the mixture of pyloric caeca and foregut in fish fed 190 and 230 g/kg diets was significantly higher than those fed 70 and 110 g/kg diets. Midgut and hindgut lipase activities of fish were significantly higher than those fed the 190 and 230 g/kg diets. In conclusion, based on the second-order polynomial model of WG and FCR, this study suggested that 173.8-195.0 g/kg dietary lipid levels were appropriated for B. lenok. K E Y W O R D S fish nutrition, lipid requirement, Manchurian trout, metabolism How to cite this article: Chang J, Niu HX, Jia YD, Li SG, Xu GF. Effects of dietary lipid levels on growth, feed utilization, digestive tract enzyme activity and lipid deposition of juvenile Manchurian trout, Brachymystax lenok (Pallas). Aquacult Nutr. 2018;24:694-701. https://doi.

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Dietary Pure Polyhydroxyalkanoate Effects on Growth, Nutrient Utilization, Apparent Digestibility, and Hematology in Nile Tilapia

Rodriguez-Estrada

Tachibana²,

Dias³

et al. 2021

N American J Aquac

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In the past decade, different groups of additives (probiotics, oligosaccharides, and plant extracts) have been widely researched and used in worldwide aquaculture. Recently, other groups, such as biopolymers (e.g., poly‐β‐hydroxybutyrate) with prebiotic properties, have been investigated. Among biopolymers, the use of pure polyhydroxyalkanoate (PHA; composition = 95–100%) as a feed additive in aquaculture has not been studied yet. Therefore, the aim of the present study was to research the effects of four supplementation levels of pure PHA on growth, survival, feed and nutrient utilization, apparent digestibility coefficients (ADCs), and hematology of Nile Tilapia Oreochromis niloticus. Five isonitrogenous and isolipidic diets were designed, including a control (C) diet without PHA supplementation. Remaining diets were supplemented with the following levels of PHA: PHA 0.1% (basal diet + 0.1% PHA), PHA 0.5% (basal diet + 0.5% PHA), PHA 1.0% (basal diet + 1.0% PHA), and PHA 2.0% (basal diet + 2.0% PHA). After a 70‐d feeding test period, the PHA 0.5% and PHA 1.0% experimental groups showed significantly higher final body weight, weight gain, specific growth rate, lipid efficiency and productive value, and ADCs of lipid and energy compared to those of the C group. Protein efficiency ratio was significantly higher in fish fed the PHA 0.1%, PHA 0.5%, and PHA 1.0% diets compared to the C group. Protein productive value significantly increased in the PHA 1.0% group. The ADC of protein was significantly higher in fish fed diets supplemented with any level of PHA compared to C fish. Regarding hematological parameters, hematocrit value showed a significant increase in fish fed PHA 0.1% compared to the C group. Leukocyte composition (%) did not show significant differences among experimental groups. Based on polynomial regression analysis, the optimum inclusion levels of PHA in Nile Tilapia diets were 0.82–0.92% for growth performance, 1.0–1.1% for nutrient utilization, 1.0–1.2% for ADCs, and 1.34% for hematocrit. Cost–benefit ratio analysis revealed nonsignificant but numerical differences among experimental diets. Results suggest that pure PHA, when supplemented at 0.1, 0.5, 1.0, or 2.0%, has certain positive effects on growth, nutrient and feed utilization, and ADCs without compromising Nile Tilapia hematology or health.

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Effects of dietary lipid levels on growth, feed utilization and mitochondrial function in low- and high-feed efficient families of rainbow trout (Oncorhynchus mykiss)

Cited by 27 publications

References 53 publications

Effects of dietary lipid levels on mitochondrial gene expression in low and high‐feed efficient families of rainbow trout Oncorhynchus mykiss

Effects of dietary lipid levels on mitochondrial gene expression in low and high‐feed efficient families of rainbow trout Oncorhynchus mykiss

Effects of dietary lipid levels on growth, feed utilization, digestive tract enzyme activity and lipid deposition of juvenile Manchurian trout,Brachymystax lenok(Pallas)

Dietary Pure Polyhydroxyalkanoate Effects on Growth, Nutrient Utilization, Apparent Digestibility, and Hematology in Nile Tilapia

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