Dorel Dronca - Academia.edu (original) (raw)

Papers by Dorel Dronca

Australian Journal of Experimental Agriculture, 2008

Grower ostriches that are fed more expensive diets with high energy and high protein to maximise ... more Grower ostriches that are fed more expensive diets with high energy and high protein to maximise growth can exhibit health problems. Despite this there is an ‘industry view’ that birds can be grown to slaughter weight within 8 months when high energy and protein diets are used, rather than 12–14 months using conventional diets. Given this scenario it is likely that there would be lower total feed costs associated with feeding a high energy and high protein diet for only 8 months compared with feeding a traditional diet for 12–14 months. The purpose of this experiment was to conduct an on-farm trial with grower ostriches (liveweight 48.7–50.0 kg) housed in a feedlot to examine their performance when subjected to four dietary treatments fed over 4 weeks: (i) treatment 1: birds fed a commercial grower diet with 10.7 MJ/kg and 138.0 g/kg of protein; (ii) treatment 2: birds fed a low energy (10.0 MJ/kg) and low protein (126.0 g/kg) diet; (iii) treatment 3: birds fed a high energy (12.5 M...

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

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

Lucrari Stiintifice - Universitatea de Stiinte Agricole a Banatului Timisoara, Medicina Veterinara, 2011

Bulletin of University of Agricultural Sciences and Veterinary Medicine Cluj-Napoca. Animal Science and Biotechnologies, Nov 1, 2011

Integration of the Romania in the UE is imposing a special attention to hunting animal population... more Integration of the Romania in the UE is imposing a special attention to hunting animal populations. The aim of the present paper is to study the quantitative evolution of the hunting population for the 13th species, in the period 2006-2010, in the hunting terrain 59 Giarmata, from Forest Domain-Timisoara, with a total surface of 8417 ha. The results showed that from the 13th studied species only 7 were identified from which 5 species kept the effectives constant, fact that demonstrates the existence of a balance between the number of individuals and the biogenic capacity of this hunting terrain. In return the European hare (Lepus europaeus P.) and Common Pheasant (Phasianus colchicus L.) registered on the entire studied period a decrease of the effectives with 33.9% and 18% respectively.

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

Bulletin of University of Agricultural Sciences and Veterinary Medicine Cluj-Napoca. Animal Science and Biotechnologies, Dec 15, 2008

DOAJ (DOAJ: Directory of Open Access Journals), May 1, 2015

The results of synchronization of estrus and ovulation by Ovsynch program can be improved if stag... more The results of synchronization of estrus and ovulation by Ovsynch program can be improved if stages of estrous cycles in cows are synchronized, through two administrations of PGF2α, before the administration the first dose of GnRH. The aim of our paper was to establish if the interval between the administrations of two doses of PGF 2α influence the rates of conception/pregnancy after the Ovsynch synchronization program of the estrus and ovulation. The treatments of pre-synchronization with PGF2α were started in the interval postpartum 46-50 days. At the first lot of cows, the interval between two administrations of PGF 2α was 7 days; at the second lot, the interval between the two administrations of PGF 2α was 12 days and at the third lot the interval between two administrations of PGF 2α was 14 days. As a source of PGF2α, we used 2 ml Proliz (I. Pasteur, Bucharest România) (400 mcg Cloprostenol). At all the three groups, we started the Ovsynch program at 7 days after the last administration of PGF2α by administration of 100 mcg GnRH (Ovarelin), after 7 days we administered 400 mcg Cloprostenol, and after 48 hours we administered the last dose of 100 mcg GnRH. All females were inseminated at 16-20 hours after the last dose of GnRH. At the pre-synchronized cows with 2xPGF 2α, at interval of 7 days, the rate of conception was 81.43%, significantly higher (p˂0.05) than at the pre-syncronized cow at 12 or 14 days (71.15%, 71.64% respectively). With regard at the pregnancy rates were 70%, significantly higher (p˂0.05) compared with pre-synchronized cows at 12 or 14 days (55.77%, 56.72% respectively). Are not significant differences (p> 0.05) between the pre-syncrhonized cows at 12 or 14 days.

Lucrări Ştiinţifice - Universitatea de Ştiinţe Agricole şi Medicină Veterinară, Seria Zootehnie, 2011

Integration of the Romania in the UE is imposing a special attention to hunting animal population... more Integration of the Romania in the UE is imposing a special attention to hunting animal populations. The aim of the present paper is to study the quantitative evolution of the hunting population for the 13th species, in the period 2006-2010, in the hunting terrain 59 Giarmata, from Forest Domain-Timisoara, with a total surface of 8417 ha. The results showed that from the 13th studied species only 7 were identified from which 5 species kept the effectives constant, fact that demonstrates the existence of a balance between the number of individuals and the biogenic capacity of this hunting terrain. In return the European hare (Lepus europaeus P.) and Common Pheasant (Phasianus colchicus L.) registered on the entire studied period a decrease of the effectives with 33.9% and 18% respectively.

Lucrări Ştiinţifice - Zootehnie şi Biotehnologii, Universitatea de Ştiinţe Agricole şi Medicină Veterinară a Banatului Timişoara, May 31, 2010

Integration of the Romania in the UE, is imposing a special attention to hunting animals populati... more Integration of the Romania in the UE, is imposing a special attention to hunting animals populations. The aim of the present paper was to study the quantitative evolution of the hunting population for the 13th species, in the period 2005-2009, in the hunting terrain Şarlota, from Forest Domain-Timisoara, with a total surface of 6149 ha. The conclusion was that the numeric evolution of the species studied was normal, maintaining a balance between populations as a conclusion of natural and artificial selection. It was also noticed that there is a good correlation between the numbers of individuals from the species studied and the biogenic capacity of the hunting fond studied.

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

In Romania, the Transylvanian Naked Neck hen breed is considered to be an "endangered" population... more In Romania, the Transylvanian Naked Neck hen breed is considered to be an "endangered" population, reason for which we consider that a special attention should have been given until now. Plymouth Rock breed was imported for the first time to Romania from the Studler Company, France in 1969. This paper is aiming to perform a profound analysis of the development patterns of the neural tube in the two breeds, by measurements carried out at 30, 40, 50, and 60 hours of incubation. Observations show that the closure of the neural canal and its transformation into a tube follows an undulatory pattern, of which positive and negative curls are diametrically opposed in the two breeds, while the development speed during the whole studied period have a relative similar value between the two breeds. We estimate that the two breeds have a good combinative capacity, which recommend the utilization of these genetic materials to obtain hybrids for producing "peasant-type" chicken meat, very well-appreciated by the Europeans between the two World Wars.

Scientific Papers Animal Science and Biotechnologies, May 31, 2015

The aim of this paper was to compare, from the point of view of the synchronization the estrus an... more The aim of this paper was to compare, from the point of view of the synchronization the estrus and the rates of conception and pregnancy, two synchronization programs with PRID and PRID/GnRH. The treatments of synchronization of the estrous and the ovulations were carried out according to the following synchronization protocol: (i) in the interval 46-50 days from calving was administered a dose of 2 ml Proliz (400 mcg Cloprostenol), after 7 days was introduced intravaginal a PRID device with a content of 1.55 g progesterone, after 7 days were administered 400 mcg Cloprostenol and after 2 days were retracted PRID. The females were inseminated at 56 hours from the retraction of PRID; (ii) 400 mcg Cloprostenol in the interval 46-50 days from calving, after 7 days was introduced intravaginally one PRID plus 100 mcg GnRH, after 7 days was administered 400 mcg Cloprostenol, after 2 days were retract PRID and at 32 hours were administered 100 mcg of GnRH. The females were artificially inseminated at 56 hours after the retraction of PRID.

Bulletin of University of Agricultural Sciences and Veterinary Medicine Cluj-Napoca. Animal Science and Biotechnologies, Oct 16, 2010

Non additive genetic component that is the base of a quantitative character has no predictability... more Non additive genetic component that is the base of a quantitative character has no predictability, this is the reason for which the present paper is proposing to appreciate the special combinatory capacity for average nests weight and average body mass of the descendants at the age of 21 days, in a specific crossing scheme combining three rabbit breeds common in Timis County breeders New Zealand White, Large Chinchilla and Californian. The data obtained, statistic presented confirm a good special combinative capacity for this character, reason for which the crossing scheme is recommended for producing meat individuals destined for slaughterhouses. This scheme provides an exploitation of the high frequency of the heterozygote at maternal forms and at the final hybrids.

Bulletin of University of Agricultural Sciences and Veterinary Medicine Cluj-Napoca. Animal Science and Biotechnologies, Oct 16, 2010

... PERIOD D. Dronca1, N. Păcală1, I. Bencsik1, A. Oprea3, C. Pascal2, Mihaela Ivancia2, Gabi Dum... more ... PERIOD D. Dronca1, N. Păcală1, I. Bencsik1, A. Oprea3, C. Pascal2, Mihaela Ivancia2, Gabi Dumitrescu1, Ada Cean1, Alexandra Ivan1, Liliana Boca1 1Faculty ... studied. Key words: hunting animals, hunt population, cynegetic INTRODUCTION ...

Scientific Papers Animal Science and Biotechnologies, May 31, 2014

In this paper was studied the effect of dietary energy and protein levels on characteristics of p... more In this paper was studied the effect of dietary energy and protein levels on characteristics of pectoralis major (P. major) muscle at broiler chickens, which were sacrificed at 35 and 42 days old. The genetic material was represented by broiler chickens that belonged to the "Ross-308" hybrid, with two groups (LC-control group and LE experimental group). During the growth periods (starter, growing and finishing) they have received compound feed ad libitum, with different energy and protein levels (LC-conforming to recommendations of Aviagen Company; LE-higher with 10%). After slaughter, from each group were sampled breast muscles (five per sex) and for P. major were determined: the weight, pH value, the thickness of myocytes (fiber diameter, cross-sectional area of fibers). At the LE group, high levels of dietary proteins and energy has significantly influenced pH value and the thickness of myocytes in the P. major muscle, as compared with LC. The sex and slaughter age has significantly influenced the fibers diameter from P. major muscle, which was thicker at female chickens, as compared with male chickens and at 42 days age vs. 35 days.

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

Analysis of performance data regarding the conformation traits (withers height, body weight, thor... more Analysis of performance data regarding the conformation traits (withers height, body weight, thoracic perimeter), including the traits that concur to milk production (total milk production per normal lactation, fat percent, total fat amount from milk), in cow mothers of bulls, candidate cow mothers of bulls and active population of Romanian Spotted Simmental breed from Harghita region, allow us to ascertain the followings: Analyzing the waist line trait in VMT we can conclude that it presents values between 140.40 cm and 142.00 cm, which are over welling the average value of Romanian spotted breed (136-138 cm Velea 2004). The thoracic perimeter as conformation and morphoproductive type indicator in the VMT effective has values between 199,4 cm and 208.4 cm. The cow mothers of bulls from Covasna county are in framed in the massive type for body weight, having average values between 509.40-762.60 cm. Analyzing total milk amount in VMT and CVMT from Covasna county, during the period 2004-2007, we claim that the average production in the I st lactation in VMT is comprised between 6793 kg in 2005 and 7503.5 kg in 2004. This lactation presents easily higher values in CVMT, on the same generation. The performances differences from one generation to another one could be assigned to the realized effect of selection by using high value male reproducers, and also to the conditions of the growing technology. The same aspects are maintained for the II nd lactation, III rd lactation and over it.

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 generation interval in a selection plan, according t... more The aim of the paper work is to optimize the generation interval 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 use of collateral selection and a maximum value for i/T ratio which can be obtained when average length of service is 5 years for females and 1 year for males.

Researches were making on cow milk samples from three Falticeni area loclities. Studied character... more Researches were making on cow milk samples from three Falticeni area loclities. Studied characters were mill production, fat percent, protein percent, and somatic cell count. There were analyzed the milk samples with SOMACOUNT to "Dorna Lactate" and dates have been discussed with MATLAB program. The phenotypical correlation values have been varied between +0,356 ÷ +0,542 for fat percent and protein percent; +0,080 ÷ +0,218 for fat percent and somatic cell count,-0,005 ÷ +0,117 for protein percent and somatic cell count; +0,012 ÷ +0,226 for milk production and fat percent;-0,643 ÷ +0,010 for milk production and protein percent and-0,467 ÷-0,114 for milk production and somatic cell count.

DOAJ (DOAJ: Directory of Open Access Journals), May 1, 2008

In Romania, the Transylvanian Naked Neck hen breed is considered to be an "endangered" population... more In Romania, the Transylvanian Naked Neck hen breed is considered to be an "endangered" population, reason for which we consider that a special attention should have been given until now. Plymouth Rock breed was imported for the first time to Romania from the Studler Company, France in 1969. This paper is aiming to perform a profound analysis of the development patterns of the somite number in the two breeds, by measurements carried out at 26, 30, 40, 50, and 60 hours of incubation. Observations demonstrate that somite forming is carrying on in a similar way as the other embryo complex characteristics following an undulatory curve whose curls are different in the two breeds, but the forming speed during the whole studied period is similar. We estimate that the two breeds have a good combinative capacity, which recommend the utilization of these genetic materials to obtain hybrids for producing "peasant-type" chicken meat, very well-appreciated by the Europeans between the two World Wars.

Bulletin of University of Agricultural Sciences and Veterinary Medicine Cluj-Napoca. Animal Science and Biotechnologies, 2011

Integration of the Romania in the UE is imposing a special attention to hunting animal population... more Integration of the Romania in the UE is imposing a special attention to hunting animal populations. The aim of the present paper is to study the quantitative evolution of the hunting population for the 13th species, in the period 2006-2010, in the hunting terrain 59 Giarmata, from Forest Domain-Timisoara, with a total surface of 8417 ha. The results showed that from the 13th studied species only 7 were identified from which 5 species kept the effectives constant, fact that demonstrates the existence of a balance between the number of individuals and the biogenic capacity of this hunting terrain. In return the European hare (Lepus europaeus P.) and Common Pheasant (Phasianus colchicus L.) registered on the entire studied period a decrease of the effectives with 33.9% and 18% respectively.

Australian Journal of Experimental Agriculture, 2008

Grower ostriches that are fed more expensive diets with high energy and high protein to maximise ... more Grower ostriches that are fed more expensive diets with high energy and high protein to maximise growth can exhibit health problems. Despite this there is an ‘industry view’ that birds can be grown to slaughter weight within 8 months when high energy and protein diets are used, rather than 12–14 months using conventional diets. Given this scenario it is likely that there would be lower total feed costs associated with feeding a high energy and high protein diet for only 8 months compared with feeding a traditional diet for 12–14 months. The purpose of this experiment was to conduct an on-farm trial with grower ostriches (liveweight 48.7–50.0 kg) housed in a feedlot to examine their performance when subjected to four dietary treatments fed over 4 weeks: (i) treatment 1: birds fed a commercial grower diet with 10.7 MJ/kg and 138.0 g/kg of protein; (ii) treatment 2: birds fed a low energy (10.0 MJ/kg) and low protein (126.0 g/kg) diet; (iii) treatment 3: birds fed a high energy (12.5 M...

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

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

Lucrari Stiintifice - Universitatea de Stiinte Agricole a Banatului Timisoara, Medicina Veterinara, 2011

Bulletin of University of Agricultural Sciences and Veterinary Medicine Cluj-Napoca. Animal Science and Biotechnologies, Nov 1, 2011

Integration of the Romania in the UE is imposing a special attention to hunting animal population... more Integration of the Romania in the UE is imposing a special attention to hunting animal populations. The aim of the present paper is to study the quantitative evolution of the hunting population for the 13th species, in the period 2006-2010, in the hunting terrain 59 Giarmata, from Forest Domain-Timisoara, with a total surface of 8417 ha. The results showed that from the 13th studied species only 7 were identified from which 5 species kept the effectives constant, fact that demonstrates the existence of a balance between the number of individuals and the biogenic capacity of this hunting terrain. In return the European hare (Lepus europaeus P.) and Common Pheasant (Phasianus colchicus L.) registered on the entire studied period a decrease of the effectives with 33.9% and 18% respectively.

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

Bulletin of University of Agricultural Sciences and Veterinary Medicine Cluj-Napoca. Animal Science and Biotechnologies, Dec 15, 2008

DOAJ (DOAJ: Directory of Open Access Journals), May 1, 2015

The results of synchronization of estrus and ovulation by Ovsynch program can be improved if stag... more The results of synchronization of estrus and ovulation by Ovsynch program can be improved if stages of estrous cycles in cows are synchronized, through two administrations of PGF2α, before the administration the first dose of GnRH. The aim of our paper was to establish if the interval between the administrations of two doses of PGF 2α influence the rates of conception/pregnancy after the Ovsynch synchronization program of the estrus and ovulation. The treatments of pre-synchronization with PGF2α were started in the interval postpartum 46-50 days. At the first lot of cows, the interval between two administrations of PGF 2α was 7 days; at the second lot, the interval between the two administrations of PGF 2α was 12 days and at the third lot the interval between two administrations of PGF 2α was 14 days. As a source of PGF2α, we used 2 ml Proliz (I. Pasteur, Bucharest România) (400 mcg Cloprostenol). At all the three groups, we started the Ovsynch program at 7 days after the last administration of PGF2α by administration of 100 mcg GnRH (Ovarelin), after 7 days we administered 400 mcg Cloprostenol, and after 48 hours we administered the last dose of 100 mcg GnRH. All females were inseminated at 16-20 hours after the last dose of GnRH. At the pre-synchronized cows with 2xPGF 2α, at interval of 7 days, the rate of conception was 81.43%, significantly higher (p˂0.05) than at the pre-syncronized cow at 12 or 14 days (71.15%, 71.64% respectively). With regard at the pregnancy rates were 70%, significantly higher (p˂0.05) compared with pre-synchronized cows at 12 or 14 days (55.77%, 56.72% respectively). Are not significant differences (p> 0.05) between the pre-syncrhonized cows at 12 or 14 days.

Lucrări Ştiinţifice - Universitatea de Ştiinţe Agricole şi Medicină Veterinară, Seria Zootehnie, 2011

Integration of the Romania in the UE is imposing a special attention to hunting animal population... more Integration of the Romania in the UE is imposing a special attention to hunting animal populations. The aim of the present paper is to study the quantitative evolution of the hunting population for the 13th species, in the period 2006-2010, in the hunting terrain 59 Giarmata, from Forest Domain-Timisoara, with a total surface of 8417 ha. The results showed that from the 13th studied species only 7 were identified from which 5 species kept the effectives constant, fact that demonstrates the existence of a balance between the number of individuals and the biogenic capacity of this hunting terrain. In return the European hare (Lepus europaeus P.) and Common Pheasant (Phasianus colchicus L.) registered on the entire studied period a decrease of the effectives with 33.9% and 18% respectively.

Lucrări Ştiinţifice - Zootehnie şi Biotehnologii, Universitatea de Ştiinţe Agricole şi Medicină Veterinară a Banatului Timişoara, May 31, 2010

Integration of the Romania in the UE, is imposing a special attention to hunting animals populati... more Integration of the Romania in the UE, is imposing a special attention to hunting animals populations. The aim of the present paper was to study the quantitative evolution of the hunting population for the 13th species, in the period 2005-2009, in the hunting terrain Şarlota, from Forest Domain-Timisoara, with a total surface of 6149 ha. The conclusion was that the numeric evolution of the species studied was normal, maintaining a balance between populations as a conclusion of natural and artificial selection. It was also noticed that there is a good correlation between the numbers of individuals from the species studied and the biogenic capacity of the hunting fond studied.

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

In Romania, the Transylvanian Naked Neck hen breed is considered to be an "endangered" population... more In Romania, the Transylvanian Naked Neck hen breed is considered to be an "endangered" population, reason for which we consider that a special attention should have been given until now. Plymouth Rock breed was imported for the first time to Romania from the Studler Company, France in 1969. This paper is aiming to perform a profound analysis of the development patterns of the neural tube in the two breeds, by measurements carried out at 30, 40, 50, and 60 hours of incubation. Observations show that the closure of the neural canal and its transformation into a tube follows an undulatory pattern, of which positive and negative curls are diametrically opposed in the two breeds, while the development speed during the whole studied period have a relative similar value between the two breeds. We estimate that the two breeds have a good combinative capacity, which recommend the utilization of these genetic materials to obtain hybrids for producing "peasant-type" chicken meat, very well-appreciated by the Europeans between the two World Wars.

Scientific Papers Animal Science and Biotechnologies, May 31, 2015

The aim of this paper was to compare, from the point of view of the synchronization the estrus an... more The aim of this paper was to compare, from the point of view of the synchronization the estrus and the rates of conception and pregnancy, two synchronization programs with PRID and PRID/GnRH. The treatments of synchronization of the estrous and the ovulations were carried out according to the following synchronization protocol: (i) in the interval 46-50 days from calving was administered a dose of 2 ml Proliz (400 mcg Cloprostenol), after 7 days was introduced intravaginal a PRID device with a content of 1.55 g progesterone, after 7 days were administered 400 mcg Cloprostenol and after 2 days were retracted PRID. The females were inseminated at 56 hours from the retraction of PRID; (ii) 400 mcg Cloprostenol in the interval 46-50 days from calving, after 7 days was introduced intravaginally one PRID plus 100 mcg GnRH, after 7 days was administered 400 mcg Cloprostenol, after 2 days were retract PRID and at 32 hours were administered 100 mcg of GnRH. The females were artificially inseminated at 56 hours after the retraction of PRID.

Bulletin of University of Agricultural Sciences and Veterinary Medicine Cluj-Napoca. Animal Science and Biotechnologies, Oct 16, 2010

Non additive genetic component that is the base of a quantitative character has no predictability... more Non additive genetic component that is the base of a quantitative character has no predictability, this is the reason for which the present paper is proposing to appreciate the special combinatory capacity for average nests weight and average body mass of the descendants at the age of 21 days, in a specific crossing scheme combining three rabbit breeds common in Timis County breeders New Zealand White, Large Chinchilla and Californian. The data obtained, statistic presented confirm a good special combinative capacity for this character, reason for which the crossing scheme is recommended for producing meat individuals destined for slaughterhouses. This scheme provides an exploitation of the high frequency of the heterozygote at maternal forms and at the final hybrids.

Bulletin of University of Agricultural Sciences and Veterinary Medicine Cluj-Napoca. Animal Science and Biotechnologies, Oct 16, 2010

... PERIOD D. Dronca1, N. Păcală1, I. Bencsik1, A. Oprea3, C. Pascal2, Mihaela Ivancia2, Gabi Dum... more ... PERIOD D. Dronca1, N. Păcală1, I. Bencsik1, A. Oprea3, C. Pascal2, Mihaela Ivancia2, Gabi Dumitrescu1, Ada Cean1, Alexandra Ivan1, Liliana Boca1 1Faculty ... studied. Key words: hunting animals, hunt population, cynegetic INTRODUCTION ...

Scientific Papers Animal Science and Biotechnologies, May 31, 2014

In this paper was studied the effect of dietary energy and protein levels on characteristics of p... more In this paper was studied the effect of dietary energy and protein levels on characteristics of pectoralis major (P. major) muscle at broiler chickens, which were sacrificed at 35 and 42 days old. The genetic material was represented by broiler chickens that belonged to the "Ross-308" hybrid, with two groups (LC-control group and LE experimental group). During the growth periods (starter, growing and finishing) they have received compound feed ad libitum, with different energy and protein levels (LC-conforming to recommendations of Aviagen Company; LE-higher with 10%). After slaughter, from each group were sampled breast muscles (five per sex) and for P. major were determined: the weight, pH value, the thickness of myocytes (fiber diameter, cross-sectional area of fibers). At the LE group, high levels of dietary proteins and energy has significantly influenced pH value and the thickness of myocytes in the P. major muscle, as compared with LC. The sex and slaughter age has significantly influenced the fibers diameter from P. major muscle, which was thicker at female chickens, as compared with male chickens and at 42 days age vs. 35 days.

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

Analysis of performance data regarding the conformation traits (withers height, body weight, thor... more Analysis of performance data regarding the conformation traits (withers height, body weight, thoracic perimeter), including the traits that concur to milk production (total milk production per normal lactation, fat percent, total fat amount from milk), in cow mothers of bulls, candidate cow mothers of bulls and active population of Romanian Spotted Simmental breed from Harghita region, allow us to ascertain the followings: Analyzing the waist line trait in VMT we can conclude that it presents values between 140.40 cm and 142.00 cm, which are over welling the average value of Romanian spotted breed (136-138 cm Velea 2004). The thoracic perimeter as conformation and morphoproductive type indicator in the VMT effective has values between 199,4 cm and 208.4 cm. The cow mothers of bulls from Covasna county are in framed in the massive type for body weight, having average values between 509.40-762.60 cm. Analyzing total milk amount in VMT and CVMT from Covasna county, during the period 2004-2007, we claim that the average production in the I st lactation in VMT is comprised between 6793 kg in 2005 and 7503.5 kg in 2004. This lactation presents easily higher values in CVMT, on the same generation. The performances differences from one generation to another one could be assigned to the realized effect of selection by using high value male reproducers, and also to the conditions of the growing technology. The same aspects are maintained for the II nd lactation, III rd lactation and over it.

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 generation interval in a selection plan, according t... more The aim of the paper work is to optimize the generation interval 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 use of collateral selection and a maximum value for i/T ratio which can be obtained when average length of service is 5 years for females and 1 year for males.

Researches were making on cow milk samples from three Falticeni area loclities. Studied character... more Researches were making on cow milk samples from three Falticeni area loclities. Studied characters were mill production, fat percent, protein percent, and somatic cell count. There were analyzed the milk samples with SOMACOUNT to "Dorna Lactate" and dates have been discussed with MATLAB program. The phenotypical correlation values have been varied between +0,356 ÷ +0,542 for fat percent and protein percent; +0,080 ÷ +0,218 for fat percent and somatic cell count,-0,005 ÷ +0,117 for protein percent and somatic cell count; +0,012 ÷ +0,226 for milk production and fat percent;-0,643 ÷ +0,010 for milk production and protein percent and-0,467 ÷-0,114 for milk production and somatic cell count.

DOAJ (DOAJ: Directory of Open Access Journals), May 1, 2008

In Romania, the Transylvanian Naked Neck hen breed is considered to be an "endangered" population... more In Romania, the Transylvanian Naked Neck hen breed is considered to be an "endangered" population, reason for which we consider that a special attention should have been given until now. Plymouth Rock breed was imported for the first time to Romania from the Studler Company, France in 1969. This paper is aiming to perform a profound analysis of the development patterns of the somite number in the two breeds, by measurements carried out at 26, 30, 40, 50, and 60 hours of incubation. Observations demonstrate that somite forming is carrying on in a similar way as the other embryo complex characteristics following an undulatory curve whose curls are different in the two breeds, but the forming speed during the whole studied period is similar. We estimate that the two breeds have a good combinative capacity, which recommend the utilization of these genetic materials to obtain hybrids for producing "peasant-type" chicken meat, very well-appreciated by the Europeans between the two World Wars.

Bulletin of University of Agricultural Sciences and Veterinary Medicine Cluj-Napoca. Animal Science and Biotechnologies, 2011

Integration of the Romania in the UE is imposing a special attention to hunting animal population... more Integration of the Romania in the UE is imposing a special attention to hunting animal populations. The aim of the present paper is to study the quantitative evolution of the hunting population for the 13th species, in the period 2006-2010, in the hunting terrain 59 Giarmata, from Forest Domain-Timisoara, with a total surface of 8417 ha. The results showed that from the 13th studied species only 7 were identified from which 5 species kept the effectives constant, fact that demonstrates the existence of a balance between the number of individuals and the biogenic capacity of this hunting terrain. In return the European hare (Lepus europaeus P.) and Common Pheasant (Phasianus colchicus L.) registered on the entire studied period a decrease of the effectives with 33.9% and 18% respectively.