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The effects of diet supplemented with Lactobacillus rhamnosus on tissue parameters of rainbow trout,Oncorhynchus mykiss (Walbaum) 下载免费PDF全文
Natalija Topic Popovic Ivancica Strunjak‐Perovic Roberta Sauerborn‐Klobucar Josip Barisic Margita Jadan Snjezana Kazazic Inga Kesner‐Koren Andreja Prevendar Crnic Jelena Suran Blanka Beer Ljubic Vesna Matijatko Rozelindra Coz‐Rakovac 《Aquaculture Research》2017,48(5):2388-2401
This study was carried out to establish the effects of a 6 week treatment with the diet supplemented with L. rhamnosus in concentrations of 107 CFU g?1 (G1 group) and 108 CFU g?1 (G2 group) on the condition expressed by condition factors (Fulton's, Clark's and B), intestinal microbiology, haematological, histological and selected antioxidative parameters of rainbow trout. A significantly higher condition factors were found in G1 group indicating that higher concentration of probiotic (108 CFU g?1) did not result in the better condition. Cholesterol and urea levels were significantly higher in both G1 and G2 groups, albumin in G1 and creatinine in G2 group with respect to control. A significantly higher liver TBARS level was observed in G2 group. The feeding with supplemented probiont apparently changed the resident microbiota. Three weeks after withdrawal of the supplemented feed, the microflora mostly reverted to the control composition, although L. rhamnosus in faecal matter of fish remained inherent. The epithelial structure of the proximal and distal intestine revealed the increased absorptive area in both treated groups, as well as the increase in the mucin‐secreting goblet cells. The L. rhamnosus‐treated groups demonstrated the capacity for the augmentation of the innate host defence. 相似文献
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N. Topic Popovic I. Strunjak-Perovic R. Coz-Rakovac M. Hacmanjek M. Jadan 《Fish physiology and biochemistry》2006,32(2):99-103
Plasma biochemistry parameters of 32 bluefin tuna were analyzed on two blood analyzer systems, VetTest 8008 and Olympus AU2700, and the results compared and correlated. Statistically significant differences (p<0.0001) between the two analyzers were found for the total cholesterol, triglyceride, and aspartate aminotransferase analytes, but not for those of glucose and total proteins, which demonstrated almost identical values and ranges on both analyzers (p = 0.383 and 0.188, respectively). The coefficients of variation were high for most parameters on both analyzers. Overall, we conclude that data obtained with both analyzers have the same clinical significance. In routine investigations on tuna blood, due to the relatively small numbers of available samples and small sample volumes, it is more likely that the bench-top dry-slide analyzer (VetTest 8008) will be the preferred analytical system to a high-volume primary analyzer (Olympus AU2700). 相似文献
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Natalija Topic Popovic Lidija Kozacinski Ivancica Strunjak‐Perovic Rozelindra Coz‐Rakovac Margita Jadan Zeljka Cvrtila‐Fleck Josip Barisic 《Aquaculture Research》2012,43(5):722-729
The composition of tail muscle fatty acids from wild and cultured bluefin tuna reared on a diet based on herring and sardine, along with the plasma lipid profile of the farmed individuals, was determined. The total lipid content of farmed bluefin in this study was 0.922 g/100 g or 3.49 g of saturated fatty acids (SAFA), 4.48 g of monounsaturated fatty acids (MUFA), 2.58 g polyunsaturated fatty acids (PUFA) n‐3 and 0.37 g of PUFA n‐6 fatty acids; for wild specimens, it was 0.920 g/100 g, or 2.85 g of SAFA, 4.82 g of MUFA, 2.78 g PUFA n‐3 and 0.27 g of PUFA n‐6 fatty acids. The major fatty acids in this study were 16:0; 16:1, n‐7; 18:1, n‐9 and DHA 22:6, n‐3 acids. The sum of these major components accounted for more than 57% and 80% of the total fatty acids in all the samples of farmed and wild tuna respectively. No significant differences in the proximate composition were demonstrated between farmed and wild samples, except for the energy value, in favour of the farmed tuna. Statistically, glucose tends to increase together with cholesterol (CHOL) and plasma triglyceride, as for these pairs, it showed positive correlation coefficients and P>0.05. Some measured tuna metabolites demonstrated strong mutual correlations, especially GLU, CHOL and TRIG, which are crucial factors in the lipid profile of animals. 相似文献
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Antioxidant activity of methanolic extracts from inflorescence rachises, corollas, calyxes, leaves, valves of capsules and hypertrophied placenta of Catalpa bignonioides by 1,1-diphenyl-2-picrylhydrazyl reduction (DPPH) and tyrosine nitration inhibition induced by peroxynitrite was tested. 相似文献
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Sindhuja Shanmugam Margita Hefner Jeanett S. Pelck Rodrigo Labouriau Hanne L. Kristensen 《Soil Use and Management》2022,38(1):729-740
Intercropping can improve yield and nitrogen use efficiency in organic vegetable production by pairing crops with complementary resource use. An intercrop field experiment was conducted to determine yield, root growth and nitrogen (N) dynamics using faba bean (Vicia faba L.) grown as a vegetable and pointed cabbage (Brassica oleracea var. capitata cv. conica). Both crops were grown in monocropping (MC) and intercropping systems (IC). Minirhizotrons were used to measure root growth. Yield of pointed cabbage per metre row was 28% higher under the IC system than under MC, whereas faba bean yield as fresh seeds did not differ. The land equivalent ratio was 1.06, showing that improved yield under IC resulted from efficient land resource use. Even though MC cabbage had the highest aboveground biomass, total N accumulation was higher under IC and MC faba bean systems. Both root frequency and intensity were greater under IC faba bean rows compared with MC faba bean because of the presence of cabbage roots in faba bean rows. Monocropped cabbage had the highest root intensity and the lowest amount of soil mineral N in the 0–1.5 m depth after harvest. Monocropped cabbage was efficient in assimilating N, whereas MC faba bean was efficient in exporting N as harvestable yield. The nitrogen use efficiency using the IC system (75%) was higher than growing faba bean (44%) and cabbage (65%) alone. Thus, faba bean as an intercrop in organic cabbage production systems improves land and N use efficiency by complementary root growth. 相似文献
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R. Coz-Rakovac N. Topic Popovic T. Smuc I. Strunjak-Perovic M. Jadan 《Fish physiology and biochemistry》2009,35(4):641-647
The objective of this study was determination and discrimination of biochemical data among three aquaculture-affected marine
fish species (sea bass, Dicentrarchus labrax; sea bream, Sparus aurata L., and mullet, Mugil spp.) based on machine-learning methods. The approach relying on machine-learning methods gives more usable classification
solutions and provides better insight into the collected data. So far, these new methods have been applied to the problem
of discrimination of blood chemistry data with respect to season and feed of a single species. This is the first time these
classification algorithms have been used as a framework for rapid differentiation among three fish species. Among the machine-learning
methods used, decision trees provided the clearest model, which correctly classified 210 samples or 85.71%, and incorrectly
classified 35 samples or 14.29% and clearly identified three investigated species from their biochemical traits. 相似文献
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Ivancica Strunjak-Perovic Rozelindra Coz-Rakovac Natalija Topic Popovic Margita Jadan 《Fish physiology and biochemistry》2009,35(2):287-291
The frequencies of erythrocyte nuclear abnormalities, such as irregularly shaped (ISN), vacuolated nuclei (VN), binucleated
cells (BN), including micronuclei (MN), were monitored in the peripheral blood of cultured gilthead sea bream (Sparus aurata L.) from the southern Adriatic Sea (Croatia) and assessed for a relation to seasonality. Fish were sampled in February, April,
June, and September. The lowest frequencies of ISN and MN were measured in April, and the lowest frequencies of VN and BN
were found in February. The highest values of ISN and BN were detected in September. The highest values of MN and the most
frequent occurrence of VN occurred in June and April, respectively. The Spearman rank order correlation test revealed a significant
positive correlation between the frequencies of ISN, BN and MN; VN did not correlate with any of the measured parameters.
The ISN had significantly higher nuclear surface area values than normal nuclei (P < 0.001). Our results demonstrate that the measured parameters displayed a distinct seasonality. Consequently, we conclude
that seasonal variations should be taken into account when nuclear abnormalities are used as biomarkers. This variation should
be well understood in order to successfully separate true contamination effects from seasonal factors that have the potential
to affect the frequency and occurrence of nuclear abnormalities. 相似文献
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Natalija Topic Popovic Roberta Sauerborn Klobucar Ivancica Strunjak‐Perovic Margita Jadan Josip Barisic Rozelindra Coz‐Rakovac 《Aquaculture Research》2015,46(2):257-271
Most research on the P450 (CYP) system in teleosts has been done on environmental factors that influence their induction. Less is known about CYP metabolism of aquaculture antibiotics. This article outlines the impact of aquaculture antimicrobials on the piscine CYP system, with particular regard to interactions with tetracyclines, fluoroquinolones, sulphonamides, berberine and chloramphenicol, as paradigms for current, potential and discontinued piscine antimicrobial drugs. It gives an overview of literature reports and advances in the field of biological significance of the CYP in fish. Emphasis has been placed on highlighting the most significant isoforms for biotransformation of drugs, and their drug response mechanisms. The challenge is to elucidate the differences in responses of CYP enzymes in different species to antimicrobial treatment as they may have relevance for the use of antimicrobials in aquaculture, especially as drug interactions with the fish CYP may alter their distribution, metabolism and elimination. They can impact the metabolism of other drugs metabolized by the same system with an effect on the physiology of fish administered these antimicrobials. Also, they can affect the persistence of residues and the length of the withdrawal period. For food animals such as farmed fish, this knowledge is a fundamental biomedical goal. 相似文献
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