Institute of Animal Science
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Item type:Publication, Genetic structure and distribution of oxynoemacheilus bureschi (balitoridae, teleostei), and its phylogenetic relationships with other European stone loaches(2008)Šedivá, Alena, Apostolou Apostolos, Janko Karel, Kohout, Jan, Kostov Vasil, Sanda RadekThe genetic differentiation of Oxynoemacheilus bureschi (Drensky, 1928) from all three drainages (Struma=Strymon, Mesta=Nestos, Vardar=Axios) where this species occurs, as well as its phylogenetic relationships with other European stone loaches, was assessed using the mitochondrial cytochrome b gene. The phylogenetic reconstruction revealed two distinct clades within the European stone loaches with high bootstrap values. Very low genetic variability with no internal haplotypic structure has been found between and within all examined O. bureschi populations, indicated by low polymorphism and similar haplotypes. According to the nesting design and demographic patterns, the range of O. bureschi was not constant, but underwent expansion in the recent past. Lack of variation, a rather unusual phenomenon for fishes from the southern Balkans, is ascribed to facilitation of dispersal due to seashore regression, confluence events and river capture during the Pleistocene. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Effects of isoflavones in feed on plasma estradiol concentration and productive performances in laying hens(2016)Gjorgovska Natasha, Filev Kiril, Levkov Vesna, Kostov Vasil, Nastova RodneIsoflavones are phytoestrogens which have estrogen-like activity in animals and humans with structure similar to 17-β-estradiol and capable of binding to estrogen receptors (ERs).This experiment was conducted to demonstrate the effect of isoflavones on estradiol concentration in blood and its influence on the productive performances in ISA Brown laying hens fed with supplemented feed with large amount of isoflavones. Isoflavones as non steroid phytoestrogens were added in large amounts to the feed of laying hens in 0, 1000, 2000 and 3000 mg kg-1 of feed. Estradiol concentration in blood of the isoflavone-treated chickens was significantly higher in comparison with the control group (P < 0.01). The supplemented isoflavones in the feed have significant improvement on the egg weight during the 1st month (P < 0.05) and 2nd month (P < 0.01) and also for the whole experimental period (P < 0.05). Further studies are required to investigate the effect of isoflavones on other reproductive hormones (follicle stimulating hormone (FSH) and progesterone) which are related with the egg production. © 2010 by Islamic Azad Univerty, Rasht Branch, Rasht, Iran. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, The effect of feed rich in DHA on egg production, egg components and DHA content in yolk(Bulgarian Journal of Agricultural Science, 2016)Gjorgovska Natasha Filev K.,Levkov V. Gjorgjievski S., Kostov VasilThe effect of diets rich with DHA (docosahexaenoic acid) on egg production, the influence on egg structural components and DHA deposition in egg yolk were investigated on Hisex Brown laying hens. The experimental groups were fed with diets rich with 792 mg DHA kg-1 and 1180 mg DHA kg-1. The control group received commercial diets with no content of DHA. Throughout the experiment there were no statistically significant differences in live weight of laying hens (g) and feed conversion ratio (FCR:g) between control and experimental groups (P>0.05). The structural components of eggs (egg weight, white weight, yolk weight and shell weight) were also not statistically significant (P>0.05), but only the egg yolk:white ratio was statistically different (P<0.01). The concentration of DHA in 100 g yolk was 818 mg and 974 mg in group 2 and 3, respectively. The transfer of DHA was significantly higher in the experimental groups fed with supplemented diet with higher amount of DHA (P<0.01). © 2016, National Centre for Agrarian Sciences. All rights reserved. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Characterization and identification of selected metal-binding biomolecules from hepatic and gill cytosols of Vardar chub (Squalius vardarensis Karaman, 1928) using various techniques of liquid chromatography and mass spectrometry(Oxford University Press (OUP), 2019-06-19) - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Influence of Genotypes, Age, Nutrition and Interactions Genotype X Nutrition on Mortality of Broiler Chickens(Institute of Animal Husbandry, Belgrade - Serbia, 2017)Nikolova, Nedeljka., Kocevski, Dragoslav., Nastova, Rodne., Puvaca, Nikola., Hrncar, Cyril., Kostadinov, Tosho - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Major and Trace Elements in Raw Ewes’ Milk Used for Production of Traditional White Brined Cheese(National Agricultural and Food Center, Research Institute of Animal Production, 2017)Levkov, V., Stafilov, T., Pacinovski, N., Bacheva, K., Mateva, N., Gjorgovska, N., Eftimova, E., Kostadinov, T.