ISSN 2285-5750, ISSN CD-ROM 2285-5769, ISSN-L 2285-5750, ISSN Online: 2393 – 2260
 

Published in Scientific Papers. Series D. Animal Science, Vol. LXV, Issue 1
Written by Vladimir KONOVALOV, Alexey CHUPSHEV, Vyacheslav TERYUSHKOV, Marina DONTSOVA

The aim of the research is to develop a computer model that makes it possible to predict the productivity of pigs based on the data on their consumption of the exchange energy of feed and the amount of feed loss during storage and operation of technological equipment. Based on the known results, regression relationships have been established between the value of the exchange energy of the given feed and the average daily gain in the live weight of animals, as well as the cost of feed per kilogram of gain. Due to the loss of feed nutrients and the feed itself during the storage of feed in warehouses, during preparation and delivery to animals, as well as throwing away part of the feed when it is eaten by animals, the amount of nutrients consumed by the animal and the accounting of feed consumption do not match.

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Published in Scientific Papers. Series D. Animal Science, Vol. LXV, Issue 1
Written by Georgeta DINIȚĂ, Marius Gheorghe DOLIȘ, Minodora TUDORACHE, Ioan CUSTURĂ, Ionela DOBRIN

The silkworm amelioration program based on the use of the genetic resources and the inbreeding methods applicable in the case of Bombyx mori L. species targets mainly the creation of races and hybrids with superior traits. The improvement process by inbreeding is practiced in the creation of new populations and it requires the use in crossings of the inbred lines that meet the most valuable biological and productive characteristics, with a high combinative value. The possibility of rearing more silkworm generations per year, the physiological particularities and the variability of species characters constituted the base of the formation of silkworm races, lines and hybrids with high productive capacity.

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Published in Scientific Papers. Series D. Animal Science, Vol. LXV, Issue 1
Written by Evgeniya ACHKAKANOVA, Genoveva STAYKOVA

Subject of a scientific experiment were 16 male lambs of the Ile de France breed, divided into 2 groups of 8, with different types of birth, fattened for a period of 60 days. The aim of the experiment was to study the growth and fattening abilities of lambs with different types of birth. Live weight was recorded at birth, at 60, at 75, at 90, at 105 days and pre-slaughter live weight at 120 days. The average daily gain by groups and subperiods was calculated. The quantities of feed consumed and the residual quantities were reported daily. The data were processed by the methods of variation statistics with Data Analysis, EXCEL, 2016 by Microsoft. It was found that male twin lambs of the Ile de France breed started the experiment with 12.81% lower average live weight, but in 60 days achieved 8.74% significantly higher absolute gain of 25.312 kg, compared to the group of singles – 23.100 kg. The twins achieved a 7.42% higher average daily gain of 0.445 g compared to singles for the entire experimental period. The twin lambs achieved 1 kg increase with lower consumption, respectively by 5.57% of dry matter, 6.36% of energy and crude protein by 7.18% of the group of singles, which shows better feed utilization and the indication of compensatory growth in lambs born as twins.

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Published in Scientific Papers. Series D. Animal Science, Vol. LXV, Issue 1
Written by Alexandru Țachi GRAPĂ, Nicoleta DEFTA, Izabela OPREA

The research revealed that when consumers read this information, they are most interested in the list of ingredients, substances causing allergies or intolerance, the date of minimum durability or use-by date and the net quantity on the food. In addition to the descriptive analysis that revealed how these factors influence consumer confidence in the information read on labels, the results of the study showed gender differences in the importance of reading label information. The frequency of reading label information is influenced by people who engage in daily physical activity. Regarding the frequency of reading label information, the χ2 test revealed significant differences between food poisoners and healthy people. The results of this study may be useful to companies and institutions dealing with food safety. They, through specially designed programmes (as exist in other countries for the uninformed, in our case discussing men, the elderly and those with no formal education), can improve the frequency of reading and confidence in label information.

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Published in Scientific Papers. Series D. Animal Science, Vol. LXV, Issue 1
Written by Dragoș Florin MANEA, Răzvan Mihail RADU-RUSU, Marius DOLIȘ, Gherasim NACU, Vasile MACIUC

It is weel known that in order to increase progress on cattle farms it is necessary to monitor animals in order to determinate the genetic quality of animals, by assessing the quantitative and qualitative characters of the animals, estimating breeding values and setting up a database on these aspects. In our country, as a result of favorable factors, such as natural pasture potential, European subsidies, government programs for the purchasing animals, extensive-intensive growth technology systems, the price of bovine meat, population trends towards the consumption of meat obtained in ecological conditions, in Romania were imported a series of specialized breeds for meat production, including Aberdeen Angus, Galloway, Highland, Aubrac, Charolais, Limousin. Thus, in order to expand the database and monitoring the qualitative and quantitative characters of the animals, specific breeding programs to each breed were developed. Regarding the Aberdeen Angus breed, the genealogical register is held by the Aberdeen Angus Association from Sibiu county, which also leads the activity of official performances control on national level. Recordings are made in accordance with legislative framework, in herds of pure breed Aberdeen Angus cattle and also cross-breeding programs with Aberdeen Angus terminal bulls. The control purpose is to record the weights of calves between three and fourteen months old, observing the specific characters of Aberdeen Angus breed and managing all purebred bulls. Data is collected in order to provide farmers with information useful for herd management and raw data for genetic evaluations. Generally, in this paperwork it will be studied the legislative framework, the control technique, the control methods, the national evolution of performances, the stock evolution and the appreciation of the bulls.

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Published in Scientific Papers. Series D. Animal Science, Vol. LXV, Issue 1
Written by Teodor COCOR, Marius MAFTEI, Dorel DRONCA, Mirela AHMADI, Gheorghe Emil MĂRGINEAN

The aim of this study is to reveal the massive involution of wild boar herds in Romania and especially in Dobrogea area. Everybody knows about the effects of the African swine fever on wild boar herds, but no one talks about the impact it has on the environment. In the current conditions, there would have been the possibility to intervene and to populate with animals raised in these hunting complexes. The study focused on the Dobrogea area because it was the first and most affected area of the country. We analyze the official data from national evaluation of sedentary game in Dobrogea area, more exactly Constanta and Tulcea County. Hunting territories in these two counties are managed by National Forest Authority, county associations of hunters and other associations for conservation of biodiversity and management of hunting territories. We analyze wild boar real effective between 2018 and 2021 by counties, by sexes, and in comparison with optimal effective (maximal number of individuals who can leave in a hunting area, without causing damage to the agricultural fields or in the forest).

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Published in Scientific Papers. Series D. Animal Science, Vol. LXV, Issue 1
Written by Mugurel COLA, Florica COLA

The concept of prudent usage of the antibiotics supposes that their application should have the greatest effect on human and animal health and they should determine the weakest bacteria resistance to the antibiotic used. Among the 48 milk samples assessed, 4 samples (8,33%) were positive according to the test accomplished with the Ecotest device. After 10 minutes of incubation, 91,67% of the samples had enough lactic acid. The lactic acid determined acid pH and phenolphthalein in acid environment is colourless. The test tubes containing the milk from these samples stayed white (the colour of the milk). For the rest of the milk samples (8,33%), because of the presence of antibiotic waste, the active (microbiological) substance did not develop and, since there was no lactic acid, the pH in these test tubes is slightly alkaline or neutral and the phenolphthalein becomes pink. The device used is responsive enough to find the β-lactam antibiotics in milk and it may be used at the farm level. The antibiotic concentration according to the “screening” was under the maximum admitted limit (4 µg/l) and all of the 4 samples were “screen positive”.

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Published in Scientific Papers. Series D. Animal Science, Vol. LXV, Issue 1
Written by Madalina Alexandra DAVIDESCU, Daniel SIMEANU, Cristina SIMEANU, Mihaela IVANCIA, Steofil CREANGA

This research aims to validate the most effective method of extracting DNA from a number of 20 blood samples collected from cows. Two methods were tested, namely: DNA extraction using a manual extraction kit-Promega and automatic DNA extraction, using the Maxwell 16 LEV Blood DNA kit-Promega. Following the quantification of DNA samples, by spectrophotometry technique, the best results were obtained by applying the automatic extraction method (77.37 ng/µl DNA concentration obtained by automatic extraction compared to 14.95 ng/µl DNA concentration obtained by manual extraction). Therefore, the effectiveness of this technique has been demonstrated, representing a first step in genomic analysis protocols. The accuracy of the subsequent results depends to a large extent on the results obtained by extracting the DNA from the samples. Therefore, the automatic DNA isolation method is recommended because it has a number of advantages: accuracy, reduced analysis time, low costs, reduced labor and ease of application. This technique can be successfully applied in the analysis of genetic diversity of different animal species.

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Published in Scientific Papers. Series D. Animal Science, Vol. LXV, Issue 1
Written by Meity SOMPIE, Wisje PONTO

Gelatin is a denaturalized protein that is derived from collagen by acidic or alkaline hydrolysis and is an important functional biopolymer that has a very broad application in many industrial fields. This research was aimed to determine the effect of acetic acid concentration on characteristics of cowskin gelatin. The experiment used Completely Randomized Design (CRD) with two factors and three replicates of treatment. The first factor was concentration of acetic acid solution, consisted of (2.5, 5 and 7.5%. The second factor was soaking time in acetic acid (12, 24 and 36 hours). The result showed that concentration acetic acid solution had no significant effect (P>0.05) on the viscosity value but had significant effect (P<0.01) on the gel strength, yield, protein content and sensory test of cowskin gelatin. The soaking time had no significant effect (P>0.05) on the yields, gel strength, viscosity and protein content of gelatin. It was concluded that the best characteristics of cowskin gelatin was produced from curing 5% acetic acid concentration with soaking time 36 hours due the gel strength value, viscosity, yield and protein content of gelatin which are optimal and sensory test acceptable by panelists.

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Published in Scientific Papers. Series D. Animal Science, Vol. LXV, Issue 1
Written by Camelia Zoia ZAMFIR, Elena ILIȘIU, Ion CHIRTEȘ, Vasile Călin ILIȘIU, Andreea Hortensa ANGHEL, Cristian Vasile ILIȘIU, Dorina NADOLU

The aim of this study was to determine the effects of diet on growth performances, carcass and meat quality of Tsigai lambs – rusty variety fed with different diets, in order to improve meat quality and meat sensory characteristics of lambs; forty male lambs (L1 and L2, n = 20 heads/ group) were used in experiment from birth up to 5 months. No significant differences (p > 0.05) were found between the two lots with regard at final weight and average daily gain. The diet had a significant effect between L1 and L2 groups in terms of hot carcass weight and hot slaughter yield (p < 0.001), cold carcass weight and cold slaughter yield (p < 0.01), as well for commercial yield (p < 0.05). The juiciness and overall difference were strongly influenced by the diet administered in the present study, significant differences (p <0.001) being recorded between meat from the two groups. The diet administered to L1 influenced positively the eating qualities of lamb meat, resulting in a more juicy and tender meat, in which the specific lamb taste was attenuated.

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© 2019 SCIENTIFIC PAPERS. SERIES D. ANIMAL SCIENCE. To be cited: SCIENTIFIC PAPERS. SERIES D. ANIMAL SCIENCE.

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