Response of rainbow trout (Oncorhynchus mykiss) to varying dietary astaxanthin/canthaxanthin ratio: colour and carotenoid retention of the muscle     

G. CHOUBERT 《Aquaculture Nutrition》2010,16(5):528-535

Rainbow trout with an average initial weight of 160 g were fed during 42 days diets containing varied keto‐carotenoids astaxanthin (Ax)/canthaxanthin (Cx) ratio, as follows: Ax 100% : Cx 0%; Ax 75% : Cx 25%; Ax 50% : Cx 50%; Ax 25% : Cx 75% and Ax 0% : Cx 100%. Muscle colour and carotenoid muscle retention were studied. Colour parameter values for mixed astaxanthin–canthaxanthin‐fed fish were intermediate between those obtained for Ax 0% : Cx 100% fed fish group and for Ax 100% : Cx 0% fed fish group. Concerning muscle carotenoid retention, it has been observed that as the level of canthaxanthin in diet increased, the muscle total carotenoid retention decreased. In the mean time, as the level of canthaxanthin in diet increased, the muscle astaxanthin retention decreased while that of canthaxanthin increased. The results reported here provide further evidence of non‐beneficial effects in terms of muscle colour and muscle carotenoid retention of the use of varying dietary astaxanthin/canthaxanthin ratio for feeding rainbow trout compared to values obtained for astaxanthin‐only feed.  相似文献   

Dietary astaxanthin improved the body pigmentation and antioxidant function,but not the growth of discus fish (Symphysodon spp.)          下载免费PDF全文

Xuelu Song  Lei Wang  Xiaoqin Li  Zaizhong Chen  Gaoyang Liang  Xiangjun Leng 《Aquaculture Research》2017,48(4):1359-1367

To assess the effects of dietary astaxanthin on the growth and body colour of red discus fish (Symphysodon spp.), synthetic astaxanthin was added into the basal diet (beef heart hamburger) with the levels of 0 (control diet), 50, 100, 200, 300 and 400 mg kg^?1 respectively. The six experimental diets were fed to discus fish with an initial body weight of 10.3 ± 0.8 g for 8 weeks. The results showed that the supplementation of 50–200 mg kg^?1 astaxanthin had no significant effects on growth performance of discus fish, but the high supplementation of astaxanthin (300 or 400 mg kg^?1) significantly reduced the weight gain and increased the feed coefficient ratio (P < 0.05). After 4 or 8 weeks of feeding, the L* (lightness) values in astaxanthin‐supplemented groups were significantly lower, while a* (redness), b* (yellowness) and skin astaxanthin contents were significantly higher than the control group (P < 0.05). When the astaxanthin supplementation reached 200 mg kg^?1, skin redness and astaxanthin contents remained relatively stable. When b* was relatively stable, the supplemental astaxanthin was 300 (4 weeks) and 50 mg kg^?1 (8 weeks) respectively. With the supplemental astaxanthin increasing, the astaxanthin retention rate significantly decreased and hepatic total antioxidant capacity was strengthened. The dietary astaxanthin also significantly increased the reduced glutathione level (P < 0.05) when the astaxanthin inclusion was higher than 50 mg kg^?1. The above results showed that dietary astaxanthin could effectively improve the skin pigmentation of red discus fish in 4 weeks and the supplementation level was suggested to be 200 mg kg^?1.  相似文献   

Pigmentation and carotenoid content of shrimp fed with Haematococcus pluvialis and soy lecithin     

J. PARISENTI  L.H. BEIRÃO  M. MARASCHIN  J.L. MOURIÑO  F. Do NASCIMENTO VIEIRA  L.H. BEDIN  E. RODRIGUES 《Aquaculture Nutrition》2011,17(2):e530-e535

The aim of this work was to evaluate the effects of Haematococcus pluvialis (H. pluvialis) (carotenoid source) and H. pluvialis plus soy lecithin on development, carotenoid content, and pigmentation of shrimp (Litopenaeus vannamei). One hundred and eighty shrimps (7.8 g) were divided in six tanks (n = 30) and fed with control food, H. pluvialis, and H. pluvialis plus soy lecithin for 2 weeks. Carotenoids were extracted with acetone and quantified by UV–vis spectrophotometry, and astaxanthin was determined by high‐performance liquid chromatography. Colour was analysed by colorimetry. Lecithin/H. pluvialis group presented higher survival rate (100%) when compared to control group (93.3%). Haematococcus pluvialis and lecithin/H. pluvialis groups presented higher red‐like colour (a* 16.4 and 19.9) than control (a* 20.6). Lecithin/H. pluvialis group presented higher carotenoids content (8.2 mg kg^?1 muscle, 26.8 mg kg^?1 exoskeleton) and astaxanthin (8.5 mg kg^?1 muscle, 23.3 mg kg^?1 exoskeleton) than control (carotenoids: 4.2 mg kg^?1 muscle, 12.3 mg kg^?1 exoskeleton; astaxanthin: 3.2 mg kg^?1 muscle, 8.1 mg kg^?1 exoskeleton). Feeding with 60 ppm carotenoids (from H. pluvialis) during 2 weeks was sufficient for favouring red‐like pigmentation in shrimp, and lecithin increased astaxanthin content only in exoskeleton.  相似文献   

Effects of dietary astaxanthin on growth,blood biochemistry,antioxidant, immune and inflammatory response in lipopolysaccharide‐challenged Channa argus     

Xin‐Ming Zhu  Mu‐Yang Li  Xin‐Yu Liu  Chang‐Ge Xia  Xiao‐Tian Niu  Gui‐Qin Wang  Dong‐Ming Zhang 《Aquaculture Research》2020,51(5):1980-1991

The present study investigated the effects of dietary astaxanthin on the growth, blood biochemical, antioxidant, immune and inflammatory response in lipopolysaccharide‐challenged Channa argus. A total of 0, 50, 100 and 200 mg/kg of astaxanthin were added to the basal die for 56 days. After the feeding experiment, each group was subjected to a lipopolysaccharide challenge (except for the Control group). The results showed that adding astaxanthin to the diet can significantly increase the weight gain and specific growth rate and decrease the feed conversion ratio of C. argus; the highest weight gain, specific growth rate and minimum feed conversion ratio occurred in the 100 mg/kg group. Furthermore, dietary astaxanthin supplementation can alleviate the negative effects of lipopolysaccharides by increasing the levels of alkaline phosphatase, lysozyme, complement 3, complement 4, total serum protein, albumin, globulin, superoxide dismutase, catalase and glutathione peroxidase and decrease the serum cortisol, aspartate aminotransferase, alanine aminotransferase, glutathione peroxidase, and malondialdehyde. Dietary astaxanthin supplementation also can decrease the relative expression of inflammatory genes (nuclear factor κB, interleukin‐1, interleukin‐8 and tumour necrosis factor‐α) in the liver, spleen, kidney and intestine. To summarise, dietary astaxanthin addition can improve the growth performance and attenuate the negative effects of lipopolysaccharide challenge in C. argus. The optimal amount of astaxanthin is 100 mg/kg.  相似文献   

Amelioration of LPS‐induced inflammatory response and oxidative stress by astaxanthin in Channa argus lymphocyte via activating glucocorticoid receptor signalling pathways     

Mu‐Yang Li  Chun‐Shan Gao  Xiao‐Yan Du  Lei Zhao  Xiao‐Tian Niu  Gui‐Qin Wang  Dong‐Ming Zhang 《Aquaculture Research》2020,51(7):2687-2697

The present study was conducted to evaluate the effects of astaxanthin (AST) against lipopolysaccharide (LPS)‐induced lymphocyte viability, ultrastructural lesions, apoptosis, oxidative stress and inflammatory responses in Channa argus. Lymphocytes exposed to more than 10 μg/ml LPS alone for 24 hr showed significantly decreased cell viability, elevated nitric oxide (NO) and malondialdehyde (MDA), lactate dehydrogenase (LDH) contents, and increased nuclear factor κB p65 (NF‐κB p65), myeloid differential protein‐88 (MyD88), tumour necrosis factor‐α (TNF‐α), interleukin‐1β (IL‐1β), interleukin‐8 (IL‐8), caspase‐3, caspase‐8 and caspase‐9 gene expression. LPS at a concentration of 10 μg/ml could induce oxidative stress and inflammatory responses in lymphocytes. The activities of antioxidant enzymes (catalase (CAT), glutathione peroxidase (GPx), superoxide dismutase (SOD)) were significantly decreased after exposure to 10 μg/ml LPS. Besides, AST strikingly antagonized the LPS‐induced negative effects. AST significantly increased the expression of HSP70, HSP90, IκB‐α, and glucocorticoid receptor (GR) and decreased inflammatory responses. Further study showed that AST can activate GR signalling pathway and inhibit p65 phosphorylation. In addition, AST attenuated LPS‐induced apoptosis, mitochondrial swelling, degeneration and vacuolization. Collectively, these findings suggest that AST has protective roles in LPS‐induced cell damage via modulating GR activation in C. argus lymphocytes.  相似文献   

贵州草海小龙虾虾青素提取条件及含量测定     

张旭  冉景丞  杨卫诚  陶红梅  姜莲 《河北渔业》2019,(4):14-18

以贵州草海自然水域捕获的新鲜小龙虾(Procambarus clarkii)为材料,采用单因素实验研究了提取溶液、料液比、提取温度、提取时间、提取次数对虾青素提取效果的影响,用分光光度法测定了草海小龙虾不同部位虾青素的含量。结果表明,以乙酸乙酯为提取溶液,料液比为1∶2(g∶mL),在60℃下提取2 h,重复提取两次,再此提取条件下虾壳中虾青素含量最高。在虾壳、虾肉和内脏三个部位中,虾壳中虾青素含量最高,虾肉和内脏中也含有少量虾青素,但是含量远低于虾壳中的含量,说明了小龙虾虾青素主要富集在虾壳中。  相似文献   

Recent Advancements and Future Perspectives of Microalgae-Derived Pharmaceuticals     

Donghua Xia  Wen Qiu  Xianxian Wang  Junying Liu 《Marine drugs》2021,19(12)

Microalgal cells serve as solar-powered factories that produce pharmaceuticals, recombinant proteins (vaccines and drugs), and valuable natural byproducts that possess medicinal properties. The main advantages of microalgae as cell factories can be summarized as follows: they are fueled by photosynthesis, are carbon dioxide-neutral, have rapid growth rates, are robust, have low-cost cultivation, are easily scalable, pose no risk of human pathogenic contamination, and their valuable natural byproducts can be further processed. Despite their potential, there are many technical hurdles that need to be overcome before the commercial production of microalgal pharmaceuticals, and extensive studies regarding their impact on human health must still be conducted and the results evaluated. Clearly, much work remains to be done before microalgae can be used in the large-scale commercial production of pharmaceuticals. This review focuses on recent advancements in microalgal biotechnology and its future perspectives.  相似文献   

育肥饲料中虾青素含量对雄性中华绒螯蟹肠道和鳃部可培养优势细菌数量和组成的影响     

马文元  吴旭干  张小明  赵庆  刘灿  龙晓文  成永旭  张庆华 《水产学报》2016,40(9):1416-1430

在育肥饲料中添加虾青素会影响中华绒螫蟹肠道及鳃内的可培养优势菌群以及机体的免疫力,本实验旨在探讨饲料中虾青素含量及养殖水体对其肠道和鳃部菌群的影响。采用不同虾青素含量的饲料(0.00、26.60、41.62、81.37和75.35 mg/kg,分别对应饲料1#~5#)对雄性中华绒螫蟹进行育肥70 d后,利用基础培养基和选择性培养基对其肠道、鳃及养殖水体中的细菌进行传统分离和纯化,所得菌株进行16S rRNA测序,再进行同源性分析后做系统进化树。结果发现,在分离获得的106株细菌(登录号:KU570293~KU570368,KU570370,KU570372~KU570383,KU601302~KU6013 16,KU720553)中,92株为优势菌株,其中,肠道、鳃部和水体各29、32和31株。肠道中的可培养优势细菌属于柠檬酸杆菌属、假单胞菌属和气单胞菌属;而鳃中可培养优势细菌属于柠檬酸杆菌属、芽孢杆菌属、假单胞菌属和气单胞菌属;养殖水体中可培养优势细菌属于芽孢杆菌属、气单胞菌属、柠檬酸杆菌属、假单胞菌属和黄杆菌属。饲料2#组肠道中可培养细菌总数最高(1.06×10~8cfu/g);饲料5#肠道中的潜在致病菌数量最低,但其可培养细菌总数显著高于其他饲料组;饲料3#组肠道和鳃中潜在致病菌数量相对较高。研究表明,饲料中添加不同含量的虾青素能够显著影响雄性中华绒螫蟹肠道和鳃中的菌群构成,但对水体中可培养细菌数量无显著影响。本研究首次对投喂不同含量虾青素饲料的育肥期雄性中华绒螫蟹肠道、鳃及养殖水体可培养的优势细菌数量和组成进行分析,探究了饲料中虾青素含量以及养殖水体与蟹肠道内可培养细菌之间的联系,为中华绒螫蟹营养免疫和菌群调控提供了理论基础。  相似文献   

Utilization of (3S,3'S)-astaxanthin acyl esters in pigmentation of rainbow trout (Oncorhynchus mykiss)   总被引：2，自引：0，他引：2  

J. BOWEN  C. SOUTAR  R.D. SERWATA  S. LAGOCKI  D.A. WHITE  S.J. DAVIES  & A.J. YOUNG 《Aquaculture Nutrition》2002,8(1):59-68

The deposition of natural, optically active, astaxanthin fatty acid esters in rainbow trout ( Oncorhynchus mykiss ) was studied. Mono-esterified and di-esterified (3 S ,3' S ) astaxanthin were purified from the green microalga Haematococcus pluvialis and incorporated into extruded diets and compared with diets containing synthetic racemic astaxanthin (Carophyll Pink) and a total carotenoid extract from the alga. All sources of astaxanthin achieved >4 mg kg⁻¹ in the white muscle after 6 weeks feeding. No significant difference ( P  > 0.05) between the deposition of astaxanthin or total carotenoid for the different diets was observed. Other xanthophylls, namely lutein, zeaxanthin and idoxanthin were found in the white muscle of rainbow trout fed all diets and together accounted for 10–14% of total carotenoid. Astaxanthin was deposited in the white muscle in the stereochemical form administered in the diet, i.e. racemic astaxanthin for Carophyll Pink and ˜100% (3 S ,3' S )-astaxanthin for the algal sources. In contrast, epimerization of (3 S ,3' S ) astaxanthin from the alga was observed for the astaxanthin esters deposited in the skin of rainbow trout, with a ratio close to 1.0:2.0:1.0 (3 S ,3' S :3 R ,3' S :3 R ,3' R ).  相似文献   

植物生长调节剂对雨生红球藻细胞增殖及虾青素积累的影响   总被引：1，自引：1，他引：0  

崔宝霞  钟方旭 《水产科学》2008,27(9)

研究了4种植物生长调节剂对雨生红球藻细胞增殖、质量(干)、虾青素含量的影响.单因子试验结果表明,4种植物生长调节剂对雨生红球藻的细胞增殖在生长前期作用不明显,在对数生长期有明显的促进作用,质量(干)和虾青素含量有明显的增加;其中α-奈乙酸(NAA)、6-苄基嘌呤(6-BA)、2,4-二氯苯氧乙酸(2,4-D)、赤霉素(GA3)的最佳质量浓度分别为:0.5、0.5、0.1、0.5 me/L.正交多因子试验结果表明:培养雨生红球藻添加6-BA、N从和GA3的最佳质量浓度分别为0.5、0.1、0.05 mg/L.  相似文献