Quantitative dietary leucine requirement of juvenile Pacific white shrimp,<i>Litopenaeus vannamei</i>(Boone) reared in low-salinity water

Liu, F.‐J.; Liu, Y.‐J.; Liu, Tian; Chen, W.‐D.; Yang, Hui‐Jun; Du, Zhen‐Yu

doi:10.1111/anu.12082

Cited by 22 publications

(30 citation statements)

References 41 publications

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“…Leucine deficiency or excess may result in a reduction in the growth performance of Senegalese sole, Solea senegalensis (Aragão et al, 2004). In juvenile pacific white shrimp (Litopenaeus vannamei), increasing dietary leucine beyond 2.50% reduced the growth performance and feed utilization (Liu et al, 2014). The feed F I G U R E 1 Relative gene expressions of TOR (a), 4E-BP2 (b), S6K1 (c), eIF4E (d) and LARS (e) in the hepatopancreas and muscle of gibel carp fed diets with different leucine levels.…”

Section: Discussionmentioning

confidence: 99%

Effects of dietary leucine levels on growth, tissue protein content and relative expression of genes related to protein synthesis in juvenile gibel carp (Carassius auratus gibeliovar. CAS III)

Zou

Cao

et al. 2018

Aquac Res

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An 8-week feeding trial was conducted to investigate the impacts of dietary leucine on growth, hepatopancreas and muscle protein content and relative expressions of protein synthesis-related genes in juvenile gibel carp (5.2 g). Triplicate tanks of fish (22 fish per tank) were fed with a low (0.82%), middle (1.90%) or high (2.99%) leucine diet to apparent satiation three times a day. The results showed that the weight gain (WG) and feed efficiency (FE) of the fish fed with the 1.90% leucine diet had the highest values compared to those of other two groups (p < .05). Dietary leucine significantly affected the protein and lipid contents of the hepatopancreas (p < .05), but not muscle or the whole body composition of the fish. The amino acid contents (Arginine, Leucine, Methionine, Phenylalanine, Alanine, Aspartic acid, Glutamic acid and Proline) of the dorsal muscles of fish fed with a 1.90% leucine diet were significantly higher than those fed with a 0.82% leucine diet. Moreover, transcriptional levels of target genes of rapamycin (TOR), ribosomal protein S6 kinase 1 (S6K1), eukaryotic translation initiation factor 4E (eIF4E) and leucyl-tRNA synthetase (LARS) in the hepatopancreas were significantly up-regulated (p < .05), but eukaryotic translation initiation factor 4E-binding protein 2 (4E-BP2) was significantly down-regulated (p < .05) with the increasing dietary leucine levels. However, dietary leucine had no effects on the gene expressions of 4E-BP2 and S6K1 in the muscle of gibel carp. The present results indicate that dietary leucine led to a marked tissue-specific response on protein content in the muscle and hepatopancreas of gibel carp that is related to the TOR signalling pathway.

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Section: Discussionmentioning

confidence: 99%

Effects of dietary leucine levels on growth, tissue protein content and relative expression of genes related to protein synthesis in juvenile gibel carp (Carassius auratus gibeliovar. CAS III)

Zou

Cao

et al. 2018

Aquac Res

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“…The diet‐related mortality was observed in the dietary valine with 15.0 g/kg, which had not been found in tiger shrimp (Millamena & Teruel, ). The excess amount of dietary leucine could decrease survival rate of golden pompano and Pacific white shrimp (Huang et al., ; Liu et al., ). Valine deficiency causes lower immune ability and the serious damage of liver, eventually leading to the death of fish (Chen et al., ; Deng et al., ).…”

Section: Discussionmentioning

confidence: 99%

“…The excess amount of dietary leucine could decrease survival rate of golden pompano and Pacific white shrimp (Huang et al, 2015;Liu et al, 2014). Valine deficiency causes lower immune ability and the serious damage of liver, eventually leading to the death of fish (Chen et al, 2012;Deng et al, 2010).…”

Section: Discussionmentioning

confidence: 99%

Effect of dietary valine levels on the growth performance, feed utilization and immune function of juvenile golden pompano,Trachinotus ovatus

et al. 2017

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This experiment was designed to investigate the effects of dietary valine on the growth performance, feed utilization, digestive enzymes, serum antioxidant and immune indices of juvenile Trachinotus ovatus and determine its valine requirement. Six diets with different concentrations of L‐valine (15.0, 16.6, 18.6, 20.7, 23.5 and 25.4 g/kg dry diet, defined as diet Val‐1 to Val‐6.), were formulated to contain 430 g/kg crude protein with fish meal, soybean meal, peanut meal and precoated crystalline amino acids. Each diet was randomly assigned to triplicate treatments of 20 fish (the initial body weight was 5.34 ± 0.03 g) for 8 weeks. The results indicated that the final body weight and percent weight gain (PWG) increased with increasing valine concentration up to 18.6 g/kg (diet Val‐3), whereas the diets containing higher valine concentration reduced the growth performance significantly (p < .05). Moreover, the protein efficiency ratio, body protein deposition (BPD), muscle protein content, intestinal amylase and pepsin activities, serum T‐AOC, LZM activities, IgM, complement 3 and complement 4 concentration had a similar trend with PWG, and the trend of feed conversion ratio, serum AST, ALT activities, urea and MDA content was opposite. Meanwhile, the lipid contents of whole fish and muscle in diet Val‐6 were particularly lower than other diets (p < .05). The survival rate of diet Val‐1 was lowest in this study and was significantly lower than diet Val‐2 (p < .05). The results of polynomial regression based on PWG and BPD indicated that the optimal dietary valine requirement for Trachinotus ovatus reared in seawater‐floating net cages was 19.87–20.17 g/kg valine of dry diet, correspondingly 46.22–46.91 g/kg of dietary protein.

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“…The similar procedure was used to determine the dietary leucine requirement of juvenile L. vannamei at 0.50–1.20 psu (Liu et al . ) and the L‐isoleucine (precoated crystalline) requirement at 0.50–0.70 psu (Liu et al . ).…”

Section: Nutritional Requirements Of Litopenaeus Vannamei At Low Salimentioning

confidence: 99%

“…37.8 g protein kg À1 on dry matter). The similar procedure was used to determine the dietary leucine requirement of juvenile L. vannamei at 0.50-1.20 psu (Liu et al 2014a) and the L-isoleucine (precoated crystalline) requirement at 0.50-0.70 psu (Liu et al 2014b). The results showed that low or excess amount of dietary leucine could decrease growth performance of L. vannamei.…”

Section: Nutritional Requirements Of Litopenaeus Vannamei At Low Salimentioning

confidence: 99%

Physiological change and nutritional requirement of Pacific white shrimpLitopenaeus vannameiat low salinity

Wang

Chen

et al. 2015

Reviews in Aquaculture

129

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The Pacific white shrimp Litopenaeus vannamei is a euryhaline species with optimal salinity of 20-25 practical salinity unit (psu) for growth and survival, but has been cultured in inland water with salinity <5 psu worldwide. In the past decade, much research progress has been made on the physiological and nutritional requirements of white shrimp at low salinity. This study reviews the recent findings in the aspects of growth, survival, energy metabolism, stress resistance and immunity of white shrimp at low salinity and synthesizes recent research outcomes in nutritional requirements in an attempt to improve the shrimp performance in aquaculture at low salinity. The white shrimp at low salinity usually show slow growth, low immunity, high susceptibility to pathogens and high energy demand. The diet containing 30-36% protein, 15-20% carbohydrate and supplementations of potassium, sodium, vitamin E and C, free amino acids (glycine, alanine, proline and taurine), antioxidants and probiotics can improve shrimp growth and immunity at low salinity. The white shrimp has demonstrated the ability to synthesize DHA and EPA from LNA at low ambient salinity, but further studies are needed to further confirm this finding. Future research should focus on the understanding of physiological mechanism and adaptation associated with salinity change and nutritional manipulation. The specific dietary requirements of essential fatty acids, essential amino acids, vitamins and minerals and the nutrition-mediated immune response also warrant further study on shrimp at low salinity.

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Quantitative dietary leucine requirement of juvenile Pacific white shrimp,Litopenaeus vannamei(Boone) reared in low-salinity water

Cited by 22 publications

References 41 publications

Effects of dietary leucine levels on growth, tissue protein content and relative expression of genes related to protein synthesis in juvenile gibel carp (Carassius auratus gibeliovar. CAS III)

Effects of dietary leucine levels on growth, tissue protein content and relative expression of genes related to protein synthesis in juvenile gibel carp (Carassius auratus gibeliovar. CAS III)

Effect of dietary valine levels on the growth performance, feed utilization and immune function of juvenile golden pompano,Trachinotus ovatus

Physiological change and nutritional requirement of Pacific white shrimpLitopenaeus vannameiat low salinity

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