Potential of three new krill products for seabream larval production

Betancor, Mónica B.; Nordrum, Sigve; Atalah, Eyad; Caballero, M. J.; Benítez‐Santana, T.; Roo, Javier; Robaina, L.; Izquierdo, Marisol

doi:10.1111/j.1365-2109.2011.02842.x

Cited by 31 publications

(27 citation statements)

References 38 publications

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“…In the present study, the diets were well balanced in mineral and fat‐soluble nutrients, and, therefore, these nutrients do not seem to be related to the growth improvement. Among other nutrients, KM also contains important amounts of astaxanthin and PL (Saito et al, ), which are known to be stimulators of growth in larvae and very young fish (Betancor et al, ; Saleh et al, ). Both carotenoids and PL have been shown to improve digestive utilization of dietary lipids, hepatic utilization of lipids and carbohydrates, and growth in seabream and other sparids (Kalinovski, Robaina, Fernandez‐Palacios, Schuchardt, & Izquierdo, ; Liu et al, ).…”

Section: Discussionmentioning

confidence: 99%

Dietary krill meal inclusion contributes to better growth performance of gilthead seabream juveniles

et al. 2018

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There is a need to find sustainable alternatives to fishmeal (FM) and fish oil (FO) in feed formulations to support the continued growth of aquaculture. FM is mostly produced from mass-caught pelagic species, but the production has been relatively constant for several decades. The aim of this study was to investigate the potential of dietary krill meal (KM) inclusion as a sustainable alternative to FM. In view of that, a feeding trial with gilthead seabream juveniles was conducted to evaluate whether dietary KM at 3%, 6% and 9% inclusion improves growth performance in comparison with a control diet. At the end of the study, fish in the 9% KM group showed significantly higher body weight (32.76 g) compared with fish fed the control diet (30.30 g). Moreover, FM replacement by 9% KM indicated a reduction in the accumulation of lipid droplets in the hepatocytes and around the pancreatic islets. In summary, this study suggests that FM can be reduced in diets for seabream without negatively affecting growth performance, when KM is added. On the contrary, KM enhances gilthead seabream growth and reduces lipid accumulation and damage of hepatocytes, which will open an interesting innovation line to completely replace FM by alternative terrestrial protein sources and the partial inclusion of KM. K E Y W O R D Sfishmeal replacement, growth performance, krill meal, seabream juvenile

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Section: Discussionmentioning

confidence: 99%

Dietary krill meal inclusion contributes to better growth performance of gilthead seabream juveniles

et al. 2018

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“… Betancor, Nordrum, Atalah, Caballero, Benitez‐Santana, Roo, Robaina and Izquierdo () and Betancor, Caballero, Terova, Cora, Saleh, Benitez‐Santana, Bell, Hern andez‐Cruz and Izquierdo (). …”

Section: Methodsmentioning

confidence: 99%

Effects of dietary mannan oligosaccharides in early weaning diets on growth, survival, fatty acid composition and gut morphology of gilthead sea bream (Sparus aurata, L.) larvae

et al. 2017

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Effects of dietary mannan oligosaccharides in earlyweaning diets on growth, survival, fatty acid composition and gut morphology of gilthead sea bream (Sparus aurata, L.) larvae Abstract Early weaning of marine fish larvae with dry diets delays gut maturation and reduces growth rates. In juvenile and adult forms of several marine fish species, inclusion of dietary mannan oligosaccharides (MOS) improves gut integrity and functionality, but the effects of MOS inclusion in gilthead sea bream (Sparus aurata, L.) larval diets have not been addressed yet. Thus, this study assesses the effects of dietary MOS inclusion on survival, growth performance, gut morphology, feed acceptance and quality of gilthead sea bream larvae. For that purpose, 16 days post-hatched gilthead sea bream larvae were fed four graded levels of MOS (Biomos â , Alltech, Nicholasville, KY, USA) in weaning diets as follows: 0 g kg À1 MOS, 0.5 g kg À1 MOS, 1.5 g kg À1 MOS and 2 g kg À1 MOS. Dietary MOS did not affect feed acceptance in gilthead sea bream larvae (P > 0.05). MOS supplementation was correlated in a dose-dependent way with higher larval survival (P = 0.026). After 15 days of feeding, dietary MOS increased whole larvae (P < 0.01) arachidonic acid, eicosapentaenoic acid and docosahexaenoic acid. Gilthead sea bream larvae fed 2 g kg À1 MOS presented higher gut occupation with goblet cells after feeding compared with larvae fed the other dietary treatments. Overall, the results suggest that inclusion of MOS in early weaning diets for gilthead sea bream improves essential fatty acid utilization and may promote growth and final survival.

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“…They found a significantly higher length and weight when larvae were fed PL rich in n‐3 highly unsaturated fatty acids. More recently, dietary substitution of 2 g kg −1 DM of soybean lecithin (lipids 213 g kg −1 DM, PL 25 g kg −1 DM, DHA 24 g kg −1 DM) by krill PL (lipids 208 g kg −1 DM, PL 27 g kg −1 DM, DHA 35 g kg −1 DM) improved larval seabream growth in terms of weight and length, enhanced hepatic utilization of dietary lipids and improved gut health (Betancor et al. 2012).…”

Section: Larval Nutritionmentioning

confidence: 99%

Fish larval nutrition and feed formulation: knowledge gaps and bottlenecks for advances in larval rearing

Hamre¹,

Yúfera

Rønnestad

et al. 2013

Reviews in Aquaculture

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Despite considerable progress in recent years, many questions regarding fish larval nutrition remain largely unanswered, and several research avenues remain open. A holistic understanding of the supply line of nutrients is important for developing diets for use in larval culture and for the adaptation of rearing conditions that meet the larval requirements for the optimal presentation of food organisms and/or microdiets. The aim of the present review is to revise the state of the art and to pinpoint the gaps in knowledge regarding larval nutritional requirements, the nutritional value of live feeds and challenges and opportunities in the development of formulated larval diets.

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Potential of three new krill products for seabream larval production

Cited by 31 publications

References 38 publications

Dietary krill meal inclusion contributes to better growth performance of gilthead seabream juveniles

Dietary krill meal inclusion contributes to better growth performance of gilthead seabream juveniles

Effects of dietary mannan oligosaccharides in early weaning diets on growth, survival, fatty acid composition and gut morphology of gilthead sea bream (Sparus aurata, L.) larvae

Fish larval nutrition and feed formulation: knowledge gaps and bottlenecks for advances in larval rearing

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