Nutritional composition of rotifers following a change in diet from yeast and emulsified oil to microalgae     

Oyvind Lie  Herborg Haaland  Gro-Ingunn Hemre  Amund Maage  Einar Lied  Grethe Rosenlund  Kjartan Sandnes  Yngvar Olsen 《Aquaculture International》1997,5(5):427-438

Rotifers, Brachionus plicatilis, fed baker's yeast and a lipid emulsion (High DNA Super Selco, INVE Aquaculture NV Systems SA, Belgium), were harvested and fed Isochrysis galbana for 72 h, the nutrient composition was analysed during this period. The enrichment effect on the rotifers following transfer to I. galbana was most pronounced for ascorbic acid and thiamin. I. galbana seemed to contribute very little as a source of the lipid-soluble vitamins. Most of the minerals and trace elements were unaffected by the transfer to I. galbana, but Fe, Mn, As and Cd increased, Cu and Ni decreased whereas the effect on Cr and Mo were uncertain. The fatty acid composition of the rotifers changed towards the composition of I. galbana during the experimental period. Intermediate glycogen levels were measured in the rotifers at all sampling times. With the exception of lysine, serine and proline, all amino acid levels seemed to be unaffected by the transfer to I. galbana. This study showed that transfer of rotifers to microalgae (I. galbana) feeding had a positive effect on nutritional value. Macronutrients were maintained at adequate levels, and algal feeding improved the nutritional quality of rotifers with respect to water-soluble vitamins. Changes in rotifer nutrient composition are discussed in relation to nutritional requirements of fish larvae.  相似文献   

Effect of lipid source and bile salts in diet of Atlantic salmon, Salmo salar L., on astaxanthin blood levels     

R.E. Olsen  A. Kiessling  J.E. Milley  N.W. Ross  S.P. Lall 《Aquaculture (Amsterdam, Netherlands)》2005,250(3-4):804-812

A study was conducted to determine the effects of dietary lipid and bile acids on astaxanthin absorption in Atlantic salmon (Salmo salar L.). Fish with an average weight of 1500 g were fitted with a dorsal aorta cannula and fed diets containing herring oil, soybean lecithin, lard, or herring oil supplemented with taurocholic acid (2.5 g/kg diet). Each fish was fed all of the experimental diets in successive order to minimize the effect of individual variation. At a given time following the feeding of each diet, blood was collected and analyzed for astaxanthin. Soybean lecithin significantly lowered the absorption of astaxanthin compared to fish fed herring oil. A 20% (p < 0.12) increase in blood astaxanthin was observed when the fish were fed the diet supplemented with taurocholic acid. Feeding lard significantly increased the blood astaxanthin level compared to the control group. It appears that altering the micellar structure by stimulating micellar (taurocholic acid) or mixed micellar (lecithin) systems did not increase the apparent absorption of astaxanthin. However, increasing the phospholipid level may have actually decreased the absorption possibly by lowering the astaxanthin solubility in the micelles. The increased apparent absorption of astaxanthin with lard is possibly linked to the increased content of 16:0, 18:1n − 9 or 18:2n − 6 fatty acids in this diet, or a reduction in very long chain monoenes (20:1n − 9 and 22:1n − 9). This suggests that the solubility of astaxanthin is higher in diets containing higher levels of 16:0 or 18:1n − 1, or alternatively, that reductions in longer chain monoenes (20:1n − 9 and 22:1n − 9) increase the micellar solubility of this pigment.  相似文献   

Diagnostic accuracy of three biopsy techniques in 117 dogs with intra‐nasal neoplasia     

B. J. Harris  B. N. Lourenço  J. M. Dobson  M. E. Herrtage 《The Journal of small animal practice》2014,55(4):219-224

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Fecal carriage of multi-drug resistant and extended spectrum β-lactamases producing E. coli in household pigeons,Bangladesh     

Badrul Hasan  Kamrul Islam  Murshidul Ahsan  Zakir Hossain  Mahmudur Rashid  Bibhas Talukder  Kabir Uddin Ahmed  Björn Olsen  Mohammad Abul Kashem 《Veterinary microbiology》2014

Antibiotic resistance and ESBL constitute a risk to human and animal health. Birds residing close to humans could mirror the spectrum of human associated antibiotic resistance. Household pigeons were screened in Bangladesh to shed light on human associated, as well as, environmental antibiotic resistance. Escherichia coli from pigeons (n = 150) were tested against 11 antibiotics. 89% E. coli isolates were resistant to one or more critically important human antibiotics like ampicillin, cefadroxil, mecillinam, ciprofloxacin, gentamicin and tigecycline. No carbapenamase-producers were detected and the lower ESBL prevalence (5%) in pigeons. ESBL-producing E. coli isolates had bla_CTX-M-15 genes. Pigeons shared some bacterial clones and had bird associated sequence types like E. coli ST1408. Fecal carriage of bacteria resistance of critically important human antibiotics, together with examples of shared genotypes among pigeons, indicate the human-birds and bird to bird transmissions are important in the epidemiology of antibiotic resistance.  相似文献   

The effect of exercise on plasma concentrations of inflammatory markers in normal and previously laminitic ponies     

N. J. Menzies‐Gow  H. Wray  S. R. Bailey  P. A. Harris  J. Elliott 《Equine veterinary journal》2014,46(3):317-321

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Heritability estimates of tarsocrural osteochondrosis and palmar/plantar first phalanx osteochondral fragments in Standardbred trotters     

S. Lykkjen  H. F. Olsen  N. I. Dolvik  A. M. Grøndahl  K. H. Røed  G. Klemetsdal 《Equine veterinary journal》2014,46(1):32-37

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Rater Agreement on Gait Assessment during Neurologic Examination of Horses     

E. Olsen  B. Dunkel  W.H.J. Barker  E.J.T. Finding  J.D. Perkins  T.H. Witte  L.J. Yates  P.H. Andersen  K. Baiker  R.J. Piercy 《Journal of veterinary internal medicine / American College of Veterinary Internal Medicine》2014,28(2):630-638

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From Matterhorn to Mt Everest: Empowering Rescuers and Improving Medical Care in Nepal     

Monika M. Brodmann Maeder  Buddha Basnyat  N. Stuart Harris 《The Forestry Chronicle》2014,25(2):177-181

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Determination of a tissue and sediment threshold for tributyltin to protect prey species of juvenile salmonids listed under the US Endangered Species Act     

James P. Meador  Tracy K. Collier  John E. Stein 《水产资源保护:海洋与淡水生态系统》2002,12(5):539-551

• 1. The purpose of this report is to determine the concentrations of tributyltin in sediments that would be protective against adverse effects on prey species of salmonids listed under the US Endangered Species Act.
• 2. Two approaches for determining adverse sediment concentrations due to tributyltin (TBT) contamination are presented here. The first is the equilibrium partitioning (EqP) approach, which relies on a sediment‐water partition coefficient and toxicological data for water exposures. The EqP approach utilizes the large water quality database that has been generated over the last two decades for TBT and provides strong evidence for adverse effects at low exposure concentrations.
• 3. The second approach involves determination of a TBT tissue residue that is considered harmful for most species, which is then used to predict the sediment concentration that would likely produce this adverse tissue concentration.
• 4. Both approaches are presented here because they generally support each other but based on the information presented below, and the inherent difficulty in measuring porewater concentrations, the tissue residue approach is the recommended method for determining adverse sediment concentrations.
• 5. Using this analysis, the protective sediment concentration for TBT proposed here is 6000 ng g^?1organic carbon. Direct effects are not expected on salmonids at this sediment concentration because of their relatively short residence time in the estuary, general lack of interaction with sediment, and relatively high metabolic capacity. This concentration may ensure adequate abundance of salmonid prey species; however, it may not be low enough for the protection of sensitive benthic species.

Published in 2002 by John Wiley & Sons, Ltd.  相似文献   

Effect of dominance hierarchy formation on aerobic microbiota associated with epithelial mucosa of subordinate and dominant individuals of Arctic charr, Salvelinus alpinus (L.)     

E Ringø  R E Olsen  Ø Øverli  F Løvik 《Aquaculture Research》1997,28(11):901-904

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