<Emphasis Type="Italic">Virgibacillus proomii</Emphasis> and <Emphasis Type="Italic">Bacillus mojavensis</Emphasis> as probiotics in sea bass (<Emphasis Type="Italic">Dicentrarchus labrax</Emphasis>) larvae: effects on growth performance and digestive enzyme activities     

Ahlem Hamza  Kais Fdhila  Dora Zouiten  Ahmed Sleheddine Masmoudi 《Fish physiology and biochemistry》2016,42(2):495-507

This study examined the effects of two probiotics (Virgibacillus proomii and Bacillus mojavensis) on the digestive enzyme activity, survival and growth of Dicentrarchus labrax at various ontogenetic stages in three separate experiments. These probiotics were incorporated as single or mixed into fish feed for a period of 60 days. The growth parameters, proximate composition of whole body, digestive enzymes and gut microbiology were monitored at regular. The increments in length and weight and the survival were significantly higher (P < 0.05), and the values of food conversions were significantly lower (P < 0.05) in fishes fed the probiotic. The administration of V. proomii and B. mojavensis in diet resulted in an increase (P > 0.05) in body ash and protein content and in the specific activity of phosphatase alkaline and amylase in the digestive tract of all the fishes. V. proomii and B. mojavensis persisted in the fish intestine and in the feed in high numbers during the feeding period (group 1: 5.8 × 10⁴ CFU/ml, group 2: 9.6 × 10⁴ CFU/ml, and group 3: 9.8 × 10⁴ CFU/ml day 60). The two probiotics V. proomii and B. mojavensis were adequate for improved growth performance and survival and for healthy gut microenvironment of the host.  相似文献   

Seed Priming Influence on Early Crop Growth,Phenological Development and Yield Performance of Linola (Linum usitatissimum L.)          下载免费PDF全文

Hafeez ur Rehman  Muhammad Qaiser Nawaz  Shahzad Maqsood Ahmed Basra  Irfan Afzal  Azra Yasmeen  Fayyaz ul-Hassan 《农业科学学报》2014,13(5):990-996

Reduced early crop growth and limited branching are amongst yield limiting factors of linola. Field response of seed priming treatments viz. 50 mmol L⁻¹ salicylic acid (SA), 2.2% CaCl₂ and 3.3% moringa leaf extract (MLE) including untreated dry and hydropriming controls was evaluated on early crop growth and yield performance of linola. Osmopriming with CaCl₂ reduced emergence time and produced the highest seedling fresh and dry weights including Chl. a contents. Osmopriming with CaCl₂ reduced crop branching and flowering and maturity times and had the maximum plant height, number of branches, tillers, pods and seeds per pod followed by MLE. Increase in seed weight, biological and seed yields was 9.30, 34.16 and 39.49%, harvest index (4.12%) and oil contents (13.39%) for CaCl₂ osmopriming. Positive relationship between emergence and seedling vigor traits, 100-seed weight, seed yield with maturity time, 100-seed weight and seed yield were found. The study concludes that seed osmopriming with CaCl₂ or MLE can play significant role to improve early crop growth and seed yields of linola.  相似文献   

Integrating genotype,fungicide, and spray schedule reduced gall (Physoderma) disease progression and enhanced grain yield in faba bean     

Bitew  Beyene  Fininsa  Chemeda  Terefe  Habtamu  Ahmed  Seid 《Journal of Crop Science and Biotechnology》2023,26(2):135-149

Journal of Crop Science and Biotechnology - Faba bean is a cool season food legume crop. However, productivity of the crop is constrained by faba bean gall (FBG), which is an emerging disease that...  相似文献   

Effects of different carotenoid supplementation sources with or without sodium taurocholate on growth,feed utilization,carotenoid content and antioxidant status in fry of the European seabass,Dicentrarchus labrax          下载免费PDF全文

Ahmed Elsayed Sallam  Abdallah Tageldien Mansour  Tarek Mohamed Srour  Ashraf Mohamed Abdelsameè Goda 《Aquaculture Research》2017,48(7):3848-3858

A total of 210 European seabass fry with an average body weight of 0.51 ± 0.03 g were divided into seven experimental treatments (three replicates per treatment). The seven experimental diets (45.64% CP) were formulated to contain synthetic astaxanthin (SA; 0.1 g kg^?1), marigold flower meal (MFM; 0.2 g kg^?1) or crab waste meal (CM; 10 g kg^?1), with or without sodium taurocholate (ST; 0.4 g kg^?1); the control diet contained no supplementation. The experiment was conducted for 8 weeks. The results show that seabass fry fed the diets containing different sources of carotenoids, especially with ST, demonstrated higher growth efficiency, survival (%), feed efficiency, protein and ether extract contents of fish body. The best results were found with Diet_MFM+ST. Whole‐body carotenoid levels increased significantly with all supplementation treatments; the highest level was observed with SA, followed by fish fed Diet_MFM and Diet_CM, especially with ST co‐supplementation. Moreover, thiobarbituric acid‐reactive substances were significantly reduced in fish fed the diets containing different sources of carotenoids compared to the control diet. The total antioxidant status significantly increased in fish fed Diet_SA and Diet_CM alone or with ST compared to the control group. In conclusion, these results reveal that Diet_MFM+ST is the most suitable treatment for improving growth, feed efficiency, and the protein and ether extract contents of seabass fry compared to other sources of carotenoids. The best oxidant/antioxidant balance and carotenoid content were achieved using SA, CM and MFM with ST supplementation.  相似文献   

Response to the ration levels on growth,body composition,energy, and protein maintenance requirement of the Indian catfish (<Emphasis Type="Italic">Heteropneustes fossilis</Emphasis>—Bloch 1974)     

Imtiaz Ahmed 《Fish physiology and biochemistry》2010,36(4):1133-1143

An 8-week growth study was conducted to determine the effect of ration level, energy, and protein maintenance requirement of catfish, Heteropneustes fossilis–Bloch, fingerling (7.90 ± 0.55 cm; 3.10 ± 0.28 g) by feeding casein–gelatin-based purified diet (40% CP; 3.61 kcal g-1 GE) at six ration levels 1–6% of BW/day, at 0800 and 1700 h, in triplicate, with 20 fish per trough fitted with water flow-through system of volume 55 L. Maximum live weight gain, best feed conversion ratio (FCR), best specific growth rate (SGR), and highest protein efficiency ratio (PER) were evident for ration levels of 4–5% body weight. However, second-degree polynomial regression analysis for weight gain, FCR, PER, protein, and energy retention data indicated that the break-points occurred at 5.08, 4.18, 4.05, 4.16, and 4.17% BW/day, respectively. Significantly (P < 0.05) higher body protein content was recorded at 4 and 5% rations. While a linear increase in body fat content with inverse relationship in moisture content was evident with increasing rations. Ash content remained insignificantly (P > 0.05) low at higher rations. Protein and energy retention values also produced significant (P < 0.05) differences. Based on the results obtained, it is recommended that feeding in the range of 4 to 4.5% BW/day, corresponding to 1.60–1.80 g protein and 14.46–16.27 kcal energy g100 g⁻¹ of the diet/day is optimum for the growth and efficient feed utilization of H. fossilis, while 2–3% ration levels (0.80–1.20 g protein and 7.23–10.84 kcal energy) suggest that these amounts approximate to the maintenance requirement of this fish.  相似文献   

Insecticidal potency of RNAi‐based catalase knockdown in Rhynchophorus ferrugineus (Oliver) (Coleoptera: Curculionidae)          下载免费PDF全文

Abid Hussain  Ahmed M Aljabr 《Pest management science》2016,72(11):2118-2127

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Establishing a high throughput screening method for large scale phenotyping of castor genotypes for resistance to <Emphasis Type="Italic">Fusarium</Emphasis> wilt disease     

Ranjan K. Shaw  Mobeen Shaik  Zubair Ahmed Mir  M. Santha Lakshmi Prasad  R. D. Prasad  S. Senthilvel 《Phytoparasitica》2016,44(4):539-548

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Review of infectious agent occurrence in wild salmonids in British Columbia,Canada     

Beibei Jia  Marina K. V. C. Delphino  Babafela Awosile  Tim Hewison  Patrick Whittaker  Diane Morrison  Mykolas Kamaitis  Ahmed Siah  Barry Milligan  Stewart C. Johnson  Ian A. Gardner 《Journal of fish diseases》2020,43(2):153-175

Wild Pacific salmonids (WPS) are economically and culturally important to the Pacific North region. Most recently, some populations of WPS have been in decline. Of hypothesized factors contributing to the decline, infectious agents have been postulated to increase the risk of mortality in Pacific salmon. We present a literature review of both published journal and unpublished data to describe the distribution of infectious agents reported in wild Pacific salmonid populations in British Columbia (BC), Canada. We targeted 10 infectious agents, considered to potentially cause severe economic losses in Atlantic salmon or be of conservation concern for wild salmon in BC. The findings indicated a low frequency of infectious hematopoietic necrosis virus, piscine orthoreovirus, viral haemorrhagic septicaemia virus, Aeromonas salmonicida, Renibacterium salmoninarum, Piscirickettsia salmonis and other Rickettsia-like organisms, Yersinia ruckeri, Tenacibaculum maritimum and Moritella viscosa. No positive results were reported for infestations with Paramoeba perurans in peer-reviewed papers and the DFO Fish Pathology Program database. This review synthesizes existing information, as well as gaps therein, that can support the design and implementation of a long-term surveillance programme of infectious agents in wild salmonids in BC.  相似文献   

Partial replacement of dietary soybean meal by high‐protein distiller's dried grains (HPDDG) supplemented with protease enzyme for European seabass,Dicentrarchus labrax fingerlings     

Ashraf M. A.‐S. Goda  Sherine R. Ahmed  Hany M. Nazmi  Mohamed Z. Baromh  Kevin Fitzsimmons  Waldemar Rossi  Simon Davies  Ehab El‐Haroun 《Aquaculture Nutrition》2020,26(3):842-852

High‐protein distillers dried grains (HPDDG) is a co‐product of ethanol production that uses prefractionation technology. A 70‐day growth trial was conducted to investigate the effect of partial replacement of dietary soybean meal by high‐protein distiller's dried grains (HPDDG) with protease enzyme supplementation (PROXYM ULTRA^®) on growth performance, physiological parameters and histological changes of the intestine of European sea bass, Dicentrarchus labrax fingerlings. The results indicated that increased dietary HPDDG levels up to 50% of HPDDG supplemented with protease significantly increases growth performance and feed utilization and improved FCR of sea bass. In addition, replacement of SBM by HPDDG supplemented with protease enhanced feed intake efficiency and the health status of fish. Haematology and serum biochemistry (haemoglobin (Hb)), red blood cells (RBCs), white blood cells (WBCs) and humeral immune parameters including total protein, globulin, cholesterol, lysozyme activity and total antioxidant capacity significantly increased with increase in HPDDG supplemented with protease in the diets. Results of this study indicated that HPDDG supplemented with protease is a good alternative protein source for aquaculture feed and can be included up to 50% as a replacement of SBM without compromising growth performance and physiological parameters of sea bass.  相似文献   

Possible effect of lesser galangal (Alpinia officinarum) extracts encapsulated into mesoporous silica nanoparticles on the immune status of rainbow trout (Oncorhynchus n)     

Elham Awad  Ahmed El‐Fiqi  Dawn Austin  Alastair Lyndon 《Aquaculture Research》2020,51(9):3674-3684

Using plant extracts as immunostimulants in aquaculture has prove effectiv in resisting infectious disease, in addition to being safe and inexpensive. The present study is concerned about the prospective mode of action of using lesser galangal extract (Alpinia officinarum) encapsulated into amine surface functionalized mesoporous silica nanoparticles (MSN) in order to elevate the immune status of rainbow trout (Oncorhynchus mykiss). Fish were randomly divided into 6 groups and fed for 4 weeks with commercial diets supplemented with 0% (control), 0.5% and 1.5% of lesser galangal extract, and with previous concentrations encapsulated with MSN (0.5% + MSN, 1.5% + MSN) and MSN (without extract). The effects of the feeding trial on the innate humoural immune parameters (total protein, myeloperoxidase content, lysozyme antiproteases and bactericidal activities) in rainbow trout were examined. Also, the influence of dietary supplement on some immune‐related genes in rainbow trout head kidney (TNF, IL‐8, IL‐1b, LYZ2 and CD4) after challenge with Yersinia ruckeri was examined. The results revealed enhancement in immune parameters in all treatment groups compared to the control, especially in the fish group fed with 1.5% + MSN which showed the highest significant difference (p < .05) in total protein, lysozyme and antiproteases activities. Also, feeding lesser galangal extract encapsulated into MSN led to an increase in myeloperoxidase content and bactericidal activity. An improvement in the expression of immune‐related genes has been recorded in fish groups fed doses of lesser galangal extract and lesser galangal extract encapsulated into MSN compared to the control or to the group fed with MSN only. Particularly, the group fed with 0.5% + MSN showed a significant up‐regulation in most of the immune‐related genes. The current investigation supports using lesser galangal extract encapsulated into MSN in fish diets as a supplement to enhance the immune response of rainbow trout and elevate its resistance to infectious diseases.  相似文献