Mihaela Ivancia - Academia.edu (original) (raw)

Papers by Mihaela Ivancia

DOAJ (DOAJ: Directory of Open Access Journals), Sep 30, 2022

Achieving higher production of high quality milk and meat with lower costs depends on the charact... more Achieving higher production of high quality milk and meat with lower costs depends on the characteristics, characteristics and characteristics of the animals exploited. Therefore, the level of animal production depends on its genetic potential and the degree of its manifestation, under the influence of environmental factors that may be favorable or inhibitory. The purpose of this paper was to assess the genetic process in the performance of the population of Aubrac in which the characters were followed birth weight, weight at 200 days and 365 days. The research was carried out over a period of 3 years, the number of products analyzed annually being 60 as follows:

Bulletin of University of Agricultural Sciences and Veterinary Medicine Cluj-Napoca. Animal Science and Biotechnologies, 2007

The biological material was 23 PIC boars from 7 synthetic lines (SL 02, SL 03 and SL 19-great-gra... more The biological material was 23 PIC boars from 7 synthetic lines (SL 02, SL 03 and SL 19-great-grandfather boars; SL 1075 and SL 26-grandfather boars; SL 408 and SL 11terminal boars).The semen production has been evaluated after the preservation at intervals of 5 days and there were appreciated the ejaculate volume, the spermatozoa concentration, mobility and spermatozoa total number/ejaculate, between 12 months and 28 months age. The ejaculate average volume was 253,6 ± 13,2 ml, different depending on synthetic line, lower with 33,1% to grandfather boars, higher with 30,6% to parents boars and higher with 18,9% to terminal boars. The seasonal analysis show us lower values in summer and autumn season (with 8,9% and respective, 3,5%) and nearly higher in spring season (with 12,3%) and in winter season (with 0,1%).The spermatozoa average concentration was higher than specialty literature values that are quoted frequently (100 millions/ml) [1, 4 ]. The spermatozoa average concentration (millions/ml) is 421,22 ± 24,4 (between 511,5 ± 34,8 to grandfather and 335,3 ± 19,2 to terminal boars) and it is nearly to recently references (450-550 millions/ml)[2, 5]. The spermatozoa average number/ejaculate was 106,8 ± 4,2 x10 9 , higher than quoted specialty literature value (40-90 x10 9 spermatozoa) [6]. The spermatozoa daily average production was between 11,7 ±1,4 x 10 9 and 21,3 ± 2,3 x 10 9 (average 16,6 ± 2,2 x 10 9), and it is nearly than quoted values by Senger P.L. 2003 (16 x 10 9). In accordance with obtained results, the daily biological capacity to produce gametes is lower in warm season (15,4 ± 2,2 x 10 9) than the other seasons, when PMZ was 18,5 ± 1,8 x 10 9 .The spermatozoa mobility was between 78% and 85%. The undertaken study emphasizes a higher influence of heredity on principals' spermiogram indexes, with individual oscillations and with oscillations between synthetic lines. Also, the semen production level is influenced by environment, the higher temperatures from summer season determines the decreasing of semen production level.

Bulletin of University of Agricultural Sciences and Veterinary Medicine Cluj-Napoca. Animal Science and Biotechnologies, 2009

Journal of Biotechnology, Aug 1, 2018

Domestic cats represent the primary reservoir for zoonotic Bartonella henselae, which is the most... more Domestic cats represent the primary reservoir for zoonotic Bartonella henselae, which is the most frequent causative agent of the Cat Scratch Disease (CSD) in humans. So far, little is known about Bartonella infection in cats in Romania. Therefore, the aim of this study was to investigate the exposure to infection with B. henselae of cats in the urban area of Bucharest (South-Eastern Romania). A total number of 97 owned cats, of common breed and different age (between six months and 15 years), were included in the survey. Cat blood samples were collected and serological analysed for the presence of B. henselae IgG antibodies using an indirect IFA test. Sera were initially tested at 1:50 dilution and then the positive samples were tested at 1:100 dilutions. The findings showed a seroprevalence of 43.3% (42/97) for B. henselae in the investigated cats. No statistically significant difference between young cats (age under 1 year) and older cats was registered (p = 0.001). These results show a high exposure to B. henselae infection of investigated cats, emphazing potential risks for human health.

Lucrări Științifice - Universitatea de Științe Agricole şi Medicină Veterinară, Seria Zootehnie, 2020

DOAJ (DOAJ: Directory of Open Access Journals), Nov 1, 2021

Scientific Papers, Series D. Animal Science, 2020

It is known that the performances of the cows are influenced by the value of the mother and the v... more It is known that the performances of the cows are influenced by the value of the mother and the value of the father for which it is important to know and group the performances so that the influence of the father can be highlighted. Therefore, the present study was conducted in order to identify the families of bulls, to study the performances of their daughters and also to determine their influence on these performances, analyzing the performances for milk production, percentage and quantity of fat and protein for cows that have completed maximum IV lactation. The biological material studied was grouped into 19 families with a total of 262 milk cows, the family with the highest milk production being given by the family with the Janther bull with an average production of 7975.80 ± 225.16 kg milk while the family with the smallest amount of milk was that of the bull Jecko Embriotransfer with an average production of 6474.20 ± 546.12 kg. The results obtained from this study indicate that the bull with the most influence on the descendants is the Janther bull, having the highest average yields on the quantity of milk, the quantity of fat in milk as well as on the quantity of proteins.

Scientific Papers Animal Science and Biotechnologies, Mar 13, 2019

Aim of this study was estimation of two genetic parameters: heritability and repeatability, for f... more Aim of this study was estimation of two genetic parameters: heritability and repeatability, for five milk production traits. Data used in current paper consisted from phenotypic information from 998 cows with 1897 yield records. The traits which were considered for 305 days of lactation included milk, fat ant protein yields and percentages of milk fat and protein. Data were statistically analyzed through the S.A.V.C. (Statistical Analyze of Variance and Covariance) software. The estimated heritabilities for studied traits were 0.24 to 0.38 for milk yield (MY), 0.27 to 0.41 for fat yield (FY), 0.61 to 0.87 for percentage of fat (F%), 0.25 to 0.39 for protein yield (PY) and 0.59 to 0.78 for percentage of protein (P%). Repeatability estimates for studied traits ranged from 0.

Coastal research library, Sep 20, 2017

Establishing the necessary measures for the conservation of habitats and species of the Marine Zo... more Establishing the necessary measures for the conservation of habitats and species of the Marine Zone of the Danube Delta (ROSCI 0066) is based on the assessment of their current conservation status. Conservation measures instituted aimed at maintaining or restoring the species and habitats for which the site was designated, at an appropriate stage of conservation. The marine protected area ROSCI 0066 (overlapping the Danube Delta – marine zone) is a national protected area within the Natura 2000 European ecological network (Habitats Directive 92/43/EEC, Romanian Government Emergency Ordinance 57/2007, Minister’s of Environment, Water and Forests Order no. 46/2016), and also has the status of Ramsar and UNESCO site. The overall assessment of the conservation status of marine species and habitats derived from Annex E (V) matrix of the EC official reporting format. It was performed for marine fish species of Community interest, whose presence is certain and confirmed by research in the marine protected area’s perimeter. According to the results, Alosa immaculata Bennet, 1835 (Pontic shad) and Alosa tanaica Grimm, 1901 (Black Sea shad) have a favorable conservation status; Huso huso Linnaeus, 1758 (Beluga) and Acipenser stellatus Pallas, 1771 (Starry sturgeon) have an unfavorable conservation status – inadequate U1, while Acipenser gueldenstaedtii Brandt and Ratzeburg 1833 (Danube sturgeon) – unfavorable conservation status – bad U2. Assessing the conservation status of marine fish species contributes to the development of good management measures for biodiversity conservation in the marine protected area (MPA).

Lucrări Ştiinţifice - Zootehnie şi Biotehnologii, Universitatea de Ştiinţe Agricole şi Medicină Veterinară a Banatului Timişoara, May 31, 2012

The aim of the paper work is to optimize the population structure in a selection plan, according ... more The aim of the paper work is to optimize the population structure in a selection plan, according to model developed by Colburn (1961), which will be proposed to be applied for live weight and traits associated with carcass and meat quality improvement in Palas Meat Line. The method used in this paper work is modeling, which exist in the most animal breeding scientifically papers. After the simulations, we observed that the most convenient variant was that which prefigure 400 females in nucleus, a weight of the groups by A-24%, B-19% + 19%, C-38%, 13 rams in nucleus and maximum values for demographical parameters.

The current paper aimed to study the performances of a nucleus of specialized dairy cows belongin... more The current paper aimed to study the performances of a nucleus of specialized dairy cows belonging to Holstein-Friesian breed, imported from Germany in 2008, in the exploitation conditions from the North-East area of Romania. In order to achieve our goal were gathered milk samples, at each three months, from the whole herd. The obtained data regarding milk quality, duration of lactations and milk quantity were statistically processed. Study was carried out in 2011 on a number of 170 individuals from which were gathered a total of 596 milk samples. Samples were analysed to establish physical-chemical composition using a CombiFoss 6000 analyser. For the characters connected with milk quality, our research enlightened values between 2.40 ÷ 4.62% for fat, 2.38 ÷ 4.65% for protein and 1.78 ÷ 4.79% for casein. As regarding the milk quantitative production the studied herd recorded mean values of 7817.52 kg milk per total lactation and 26.8 kg milk per day for a mean duration of lactation of 288.5 days.

DOAJ (DOAJ: Directory of Open Access Journals), Oct 1, 2022

DOAJ (DOAJ: Directory of Open Access Journals), Oct 1, 2021

Scientific Papers, Series D. Animal Science, 2019

Lucrări Științifice - Universitatea de Științe Agricole şi Medicină Veterinară, Seria Zootehnie, 2019