32 research outputs found

    Carcass characteristics and meat quality of broilers fed on earthworm (Lumbricus rubellus) meal

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    ΔΕΝ ΔΙΑΤΙΘΕΤΑΙ ΠΕΡΙΛΗΨΗThe aim of the research was to evaluate the carcass characteristics and meat quality from chickens fed on diets in which fish meal was substituted with raw earthworms (Lumbricus rubellus) or earthworm meal. In the trial which lasted 42-days, 100 one-day-old Hybro broilers were divided into the control and three experimental groups. The control group was fed on standard broiler feed, the first (E-I) and the second experimental groups (E-II) were fed a diet in which 50% or 100% of fish meal was substituted with earthworm meal, respectively, whilst the third group (E-III) consumed feed without fish meal, but was given raw chopped earthworms ad libitum from day 1 to day 42. The replacement of fish meal with fresh earthworms resulted in significantly lower carcass weights in the E-III group in comparison with the control group (p<0.05). The differences in drumstick, thigh and breast meat share relative to the carcass mass were not significant (p>0.05). The lowest fat content in thigh and breast meat was in the group in which fish meal was replaced with earthworm meal. The lightness (L*) of thigh and breast meat was highest in the broilers fed fresh earthworms ad libitum. No significant differences in pH value were detected between the experimental groups (p>0.05). The most consumer acceptable were drumstick samples from E-II group and the least acceptable samples from the control group. Earthworm meal may be considered an adequate substitute for fish meal in broiler chickens’ diet since it does not impair the production performance, carcass yield and meat quality

    Program selektivnog uzgoja šarana (Cyprinus carpio L.) u Srbiji - preliminarni rezultati

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    The aim of this study was to estimate heritability and genetic correlations between weight, length and height of common carp in Serbia (Cyprinus carpio L.) during 3-year growth period. The 50 families of common carp were produced in 2007 and used for the estimation of genetic parameters. The fish were measured at tagging for weight, length and height (W0, L0, H0), then during the first autumn (W1, L1, H1) and during the second autumn (W2, L2, H2). Based on univariate models heritability estimates were high for all traits (0.39, 0.34 and 0.45 for W1, L1 and H1, respectively) and also for the second production year (0.49, 0.47 and 0.44 for W2, L2 and H2, respectively). The genetic correlations were estimated using multivariate models and they were high between W1 and L1 and H1 (0.81 ± 0.06 and 0.91 ± 0.03 for L1 and H1, respectively), while between H1 and L1 were moderately correlated (0.54 ± 0.12). In the second production year genetic correlations were also high, between W2 and L2 and H2 (0.64 ± 0.09 and 0.74 ± 0.06, respectively), while between length and height they were lower (0.24 ± 0.15). Based on the current results improving growth rate of common carp through genetic selection is expected to be effective.Cilj ove studije je bio da se procene heritabilnost i genetičke korelacije telesne mase, dužine i visine šarana u Srbiji u toku trogodišnjeg ciklusa. U toku 2007. godine proizvedeno je 50 familija šarana i ove jedinke iskorišćene su za procenu heritabilnosti i genetičke korelacije. Merenja riba su obavljena za osobine telesna masa, dužina i visina u momentu označavanja (W0, L0, H0), zatim pri starosti riba prva jesen (W1, L1, H1) i pri starosti druga jesen (W2, L2, H2). Na osnovu jednovarijantnih statističkih modela za svaku osobinu procene heritabilnosti su bile visoke (0.39, 0.34 i 0.45 za W2, L2 i H2). Genetičke korelacije su procenjene na osnovu multivarijacionih statističkih modela i bile su visoke između W1 i, L1 i H1 (0.81 ± 0.06 i 0.91 ± 0.03 za L1 i H1), dok su između H1 i L1 bile umereno korelisane (0.54 ± 0.12). U drugoj produkcionoj godini korelacije su takođe bile visoke, između W2 i, L2 i H2 (0.64 ± 0.09 i 0.74 ± 0.06), dok su između osobina dužina i visina, L2 i H2, bile niže (0.24 ± 0.15). Na osnovu navedenih rezultata očekuje se da bi poboljšanje prirasta u navedenoj populaciji šarana u Srbiji, putem selekcije familija, bilo uspešno

    Protosan infection of small ruminants in south part of Serbia with emphasis to north Kosovo

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    Enteral protozoan infection was of great importance to health status of small ruminants and its performances. This was parasitic infection caused by protosoas from genus Eimeria, Cryptosporidium and Giardia. Lamb and kids infection had moderate morbidity and low mortality rate. Clinical sign of infection is usually presented in animals at 4-10 days old. The study about parasitic fauna - protozoa helminths, and arthropods of small ruminant at south part of Serbia, with emphasis to North Kosovo were performed during 2017. The study included the examination in total of herds flocks of goats and sheep from Zvečan and Leposavić district (villages Ceranja, Majdevo, Zemanica, Mure, Rudine, Žitkovac, Oraovica, Mošnica, Donji Krnjin, Belo brdo, Mioliće, Drenova and Beliće. Colected faeces samples were examined using routine coprological methods. Determination of parasites we performed by morphological characteristc. Infection with protosoa occurred at and on 46.14% of examined sheep and 29.42% of examined goat herds. Coccidiosis was found at 43 sheep and 27 goat herds. We usally occured mixed infection with 2-3 coccidia species. At sheep most abundant species were E faurei, followed by Eimeria ahsata, E.ovinoidalis, E. intricata and E. pallida. At goats most abundant species were E.arlongy, folwed by infection with E. hirci, E.nina-kohlyakimovae, E. christenseni and E. caprina. Oocyst were found at adult ant young animals, but clinical sign of disease were present only at young animals. During our examination Cryptospoidium spp. was found at 29 sheep and 23 goat herds. Determination of subspecies we not performed. Lambs between five and twenty-one days were the most susceptible for infection. Lambs cryptosporidiosis has high morbidity and mortality rate. Symptoms of acute cryptosporidiosis include inapetence, and weight loss. Infection with Giardia duodenalis was found at 2 sheep herd. Determination of subspecies we not performed

    The Health Risk and Benefit Assessments for the Pelagic Fish Species’ Consumers

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    To balance the ingestion of healthy omega-3 and omega-6 fatty acids and adverse chemicals the assessments of benefits and risks of the fish consumption should be of the great importance. Elements, Persistent organic pollutants – POPs (organochlorine pesticides – OCPs and polychlorinated biphenyls – PCB), and omega-3 and omega-6 fatty acid contents were determined in six small pelagic fish species from the Adriatic Sea in Croatia to assess health risks for consumers. 16 element, 24 POPs and 14 fatty acid contents were determined in edible fishes to assess worst-case scenario, diseases development risks and benefit-risk for consumers. The results of this study were published in the scientific journal [1]. Element concentrations were measured by inductively coupled plasma mass spectrometry (ICP-MS), POPs by high-resolution gas chromatography (HRGC) and fatty acid content by gas–liquid partition chromatography (GLPC). The results of our study showed that diet based on chub mackerel and round sardinella have highest DI of essential omega-3 fatty acids and lower daily intake (DI) of POPs than other fishes. By consuming anchovy and round sardinella lower ingestion of toxic elements can be ingested. There was not observed non-carcinogenic (HI) nor carcinogenic (CR) risks based on POP concentrations, while based on element concentrations, there was low HI (0.1≥HI≥1) and the maximum HIs and outlier values (several horse mackerel and anchovy samples) showed the presence of HI (HI>1). The most significant contributor to total non-carcinogenic and carcinogenic risks was inorganic As. Acceptable CR for consumers was assessed, but maximum CR for consumers of horse mackerel and anchovy (CR≥1×10-6) showed adverse effects on human health. There were low HIs for developing cardiovascular, nervous, and reproductive diseases, and maximum HIs were higher than 1. Acceptable (1×10-4≥CR≥1×10- 6 ) risks were observed for developing cancer of nervous system and reproductive organs. Among investigated fish samples, those with higher ƩBR (benefit-risks) and BR for inorganic As than median value have a higher risk than benefits in the human diet (most of them were collected in 2015) [1]
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