Szerző szerinti böngészés "Matics, Zsolt"
Megjelenítve 1 - 12 (Összesen 12)
Találat egy oldalon
Rendezési lehetőségek
Tétel Korlátozottan hozzáférhető Aggressiveness, Mating Behaviour and Lifespan of Group Housed Rabbit DoesGerencsér, Zsolt; Matics, Zsolt; T. Szabó, Rubina; Kustos, Károly; Mikó, Annamária; Nagy, István; Odermatt, Meinrad; Atkári, Tamás; Szendrő, Zsolt; egyetemi oktató, kutatóAggressiveness is one of the main problems in group housing of rabbit does. The aim of the experiment was to investigate the frequency of aggressiveness and mating behaviour as well as the lifespan of does depending on group composition. The female and male rabbits were housed in one of the 7.7 m2 pens (four females and one male per pen). Based on the ages of female rabbits two homogenous groups (HOM) were formed containing four 17-week-old females and two heterogeneous groups (HET) containing three 17-week-old and one 1-year-old female. Twenty-four-hour video recordings were taken during the first month after assembling the groups, and the aggressive actions (fights) and matings were counted. The lifespan was examined over a 200-day experimental period. On the day after assembling the groups the number of fights among does was high in HET group. The same aggressive behaviour only started a week later in HOM group, and some fights between females and the male were also observed. The daily peaks of aggressiveness were in the morning (after the light on) and in the evening (before and after the lights off). The primary position of females in the hierarchy was clear but sometimes no differences were detected among the subordinate females. The mortality of does was connected with their rank order. The number of matings was very high on the day of assembling the groups and a second small peak was observed at the end of the hypothetical pseudo-pregnancy. In addition to mating between male and females, female–female and female–male mounting was also observed. Despite of the small sample size it seems that aggressive behaviour is frequent in group housing systems, which is contrary to animal welfare. Natural mating is not effective in group-housing systemTétel Szabadon hozzáférhető Comparison of pens without and with multilevel platforms for growing rabbitsMatics, Zsolt; Farkas, Tamás Péter; Dal Bosco, Alessandro; Szendrő, Zsolt; Filiou, Eirini; Nagy, István; Odermatt, Meinrad; Paci, Gisella; Gerencsér, Zsolt; PhD hallgató; egyetemi oktató, kutatóThis experiment compared the productive performance and location of growing rabbits in pens without and with two-level platforms (wire-mesh or plastic-mesh). A total of 174 rabbits of both sexes weaned at 5 weeks of age were randomly divided into three groups (n ¼ 58 rabbits/group, 2 pens/treatment, 29 rabbits/pen). The floor area of pens was 1.0 1.83 m, and the floor was made of wire-mesh. Two pens were equipped with wire-mesh (WP) and two pens with plastic- mesh elevated platforms (PP) on two levels, and two pens were without platforms (NoP). Treatment had no effect on the productive performance of growing rabbits. Based on video recordings, animal density (rabbits/m2 in each location) was higher (p < .001) on the floor than on the platforms (in WP: 12.0 vs. 5.2, in PP: 10.2 vs. 7.4 rabbits/m2, respectively). Animal density on the floor was higher (p < .001) in front of the platforms than under the platforms (in WP 15.7 vs. 9.8 rabbits/m2 and in PP 13.3 vs. 8.3 rabbits/m2, respectively). The animal density on plat- forms was 1.4 times higher in group of PP than in WP (p < .001). The animal density was 1.6 and 2.9 times higher on the second floor than on the first one (p < .001), in group of PP and WP, respectively. The concentration of cortisol metabolites in faeces and the ratio of injured rabbits were similar in the three groups. The rabbits showed higher preference staying on the floor compared to the platform. Pens with platforms were not influencing productive performance.Tétel Korlátozottan hozzáférhető A csillagfürt, mint nyúltakarmányMatics, Zsolt; Szendrő, Zsolt; Gerencsér, Zsolt; Szendrő, Katalin; egyetemi oktató, kutatóTétel Szabadon hozzáférhető DIVERGENT SELECTION FOR FAT INDEX IN PANNON KA RABBITS: GENETIC PARAMETERS, SELECTION RESPONSEKasza, R; Matics, Zsolt; Gerencsér, Zsolt; Donkó, Tamás; Radnai, István; Szendrő, Zsolt; Nagy, István; egyetemi oktató, kutatóThe objective of this study was to estimate the response to selection for total body fat content of rabbits measured by computer tomography (CT). A divergent selection experiment was performed using Pannon Ka rabbits, which were previously selected for number of kits born alive. The so-called zero generation consisted of 351 Pannon Ka rabbits, from which the index, total body fat volume (cm3) divided by the body weight (kg), was measured. Rabbits with low and high fat index values were selected to form the parent groups of the lean and fat lines, respectively. The lines consisted of 55-72 females and 35-47 males, depending on the line and generation. After three generations, the rabbits were evaluated by means of a single trait animal model. The fat index showed a moderate heritability estimate (0.28±0.03). The magnitude of the common litter effect was small (0.10±0.02). The breeding values averaged per generation provided slightly asymmetrical responses. Based on the results, the divergent selection was successful in confirming that CT is a very suitable method for performing selection for body composition traits.Tétel Szabadon hozzáférhető Effect of ambient temperature on the productive and carcass traits of growing rabbits divergently selected for body fat contentMatics, Zsolt; Gerencsér, Zsolt; Kasza, Rozália; Terhes, Katalin; Nagy, István; Radnai, István; Dalle Zotte, Antonella; Cullere, M; Szendrő, Zsolt; egyetemi oktató, kutatóRabbits are particularly sensitive to heat stress which can affect productive performance, with rabbit breed/line possibly playing a role on the response to this condition. The study aimed at evaluating the effect of different ambient temperatures on the live performance and carcass traits of growing rabbits divergently selected for total body fat content. The two genetic lines (Lean and Fat) were selected based on the total body fat content estimated by computer tomography during five generations. From birth to slaughter (13 weeks of age), the rabbits were housed in two rooms where the temperature was controlled with air conditioners: in the control room the average ambient temperature was 20 °C and in the high temperature room it was 28 °C. After weaning (35 d), 60 Lean and 60 Fat rabbits/room were housed by two in wire-mesh cages and fed ad libitum with commercial pellets. The BW and feed intake (FI) were measured at 5, 7, 9, 11 and 13 weeks of age to calculate the daily weight gain (DWG) and feed conversion ratio (FCR). Mortality was recorded daily. At the end of the experi ment, rabbits were slaughtered and carcass traits were measured. Mortality was independent of temperature and line. The temperature significantly influenced the FI, DWG, BW and the fat deposits: they were lower at higher ambient temperature. The effect of temperature differed according to the rabbits' total body fat content. At control temperature, the FI (165 vs 155 g/day; P < 0.05) and FCR (4.67 vs 4.31; P < 0.05) were higher in Fat rabbits, which also had more perirenal (36.2 vs 23.1 g; P < 0.05) and scapular fat (10.8 vs 7.1 g; P < 0.05). At high temperature, no differences in fat depots (14.5 vs 9.8 g; 5.3 vs 3.5 g) were found between the two lines. It can be concluded that temperature × genetic line interaction had an important role in productive and carcass traits, as the effect of temperature differs between Lean and Fat rabbits.Tétel Szabadon hozzáférhető EGYEDI ELHELYEZÉSSEL KOMBINÁLT CSOPORTOS TARTÁS HATÁSA AZ ANYANYULAK TERMELÉSÉRE, HELYVÁLASZTÁSÁRA ÉS VISELKEDÉSÉREGerencsér, Zsolt; Farkas, T P; Szendrő, Zsolt; Nagy, István; Odermatt, Meinrad; Radnai, István; Kacsala, László; Kasza, R; Savanyó, Zs; Matics, Zsolt; egyetemi oktató, kutatóThe aim of the experiment was to test a special pen system of combination of group and individual housing, examination of production and preference of rabbit does. The experiment was conducted at Kaposvár University with pregnant and lactating Pannon White rabbit does (n=48). The 1.83 x 2.00 m open top pen consisted of four individual cages (0.5 x 0.91 m) which were connected to the 1.83 x 1.00 m common area throughout a 0.25 m long and 0.20 m wide lockable corridor. The rabbit does were randomly divided into three groups. The groups differed only in that the material of walls of the individual cages. Pen with solid wall cages (Solid, n=16); pen with wire-mesh wall cages (Wire, n=16) and pen with partly solid and partly wire-mesh wall cages (Mix, MP, n=16). Four rabbit does were placed to the closed individual cages 3 days before the expected parturition for 21 days. 18 days after kindling the entrances of the individual cages were opened, and the 21-day group-housing started. All 4 does and their kits could use all individual cages and the common area freely. The kits were weaned at 35 days of age. The injuries on ears, and body were checked on days 2, 4, 8, 14 and 22 after grouping the does. 24-h video recordings were made on days 1, 2, 3, 7 and 13 after opening the doors, and location of rabbits was registered at every 15 min. On day 1 rabbit does preferred to stay alone than together (Solid: 62.3%; Wire: 64.3%; Mix: 82.8%). Later on, less rabbit does located alone (on day 13: Solid: 30.8%; Wire: 51.0%; Mix: 39.2%). On day 1 in all pens the majority of the does located in the individual cages (Solid: 77.3%; Wire: 76.8%; Mix: 83.9%), however later the percentage of does in the individual cages decreased until day 13. At almost every day less rabbit does preferred the individual cages in the Solid than in Wire or Mix group. Rabbit does preferred their own cages, more rabbit does stayed in the own cages than the expected probability (25%) on all days (day 1: Solid: 64.6%; Wire: 68.4%; Mix: 74.6%; day 13: Solid: 28.0%; Wire: 38.0%; Mix: 34.5%). In Mix group rabbit does which were housed in solid wall cages before grouping preferred to stay in the solid wall cages in all days (day 13: 59.1%) and that of housed in wire-mesh cages before grouping preferred to stay in wire- mesh cages (day 13: 65.6%). No significant differences were found between the different types of pens in almost the all production traits. The productive performance fits to the results of Pannon Breeding Program. On the other hand in Wire and Mix groups the does mortality were 6.3% and 12.5% and the kindling rates were 62.5 and 68.8%. The ratio of injured rabbits was higher than 50% in each system. Based on the results it can be concluded that the main problems of group housing of does (aggressiveness, injuries) have not been solved with this system.Tétel Szabadon hozzáférhető AZ ELTÉRŐ KÖRNYEZETI HŐMÉRSÉKLET HATÁSÁNAK VIZSGÁLATA ALACSONY ÉS MAGAS TESTZSÍRTARTALOMRA SZELEKTÁLT NÖVENDÉKNYULAKONTerhes, Katalin; Gerencsér, Zsolt; Nagy, István; Radnai, István; Kasza, Rozália; Dalle Zotte, Antonella; Cullere, M; Matics, Zsolt; egyetemi oktató, kutatóThe aim of the study was to investigate the effect of divergent selection for total body fat content on the production performance and carcass traits of growing rabbits at different ambient temperature. The experiment was conducted at Kaposvár University with Pannon Ka growing rabbits. Weaned rabbits (n= 60 Lean and 60 Fat rabbits/room) were housed in two identical rooms where the temperature was controlled with air conditioner. In the control room the average ambient temperature was 20°C and in the other room it was 28°C. The rabbits were born in these rooms, and were housed from weaning (5 wk) to slaughtering (13 wk) in wire-mesh cages (2 rabbits/cage) and fed ad libitum with commercial pellet. Body weight and feed consumption was measured fortnightly and the individual weight gain and feed conversion ratio were calculated. At the end of the experiment rabbits were slaughtered. The temperature significantly influenced the production performance and carcass traits. On higher temperature feed intake, weight gain and body weight decreased but the feed conversion ratio improved. The Lean rabbits were heavier and their chilled carcass was greater than Fat rabbits on higher temperature. On control temperature Fat rabbits consumed more feed and their feed conversion ratio deteriorated. The perirenal and scapular fat were lower on higher temperature in both genotype, but Fat rabbits had significantly more fat than Lean rabbits. The higher temperature had negative effect on the production but Lean rabbits had better results in some traits than Fat rabbits.Tétel Korlátozottan hozzáférhető Eltérő környezeti hőmérséklet hatásának vizsgálata alacsony ill. magas testzsírtartalomra szelektált anyanyulakonTerhes, Katalin; Kasza, Rozália; Donkó, Tamás; Szendrő, Zsolt; Radnai, István; Gerencsér, Zsolt; Hatvani, Ferenc; Matics, Zsolt; egyetemi oktató, kutatóTétel Korlátozottan hozzáférhető AZ IVÓVÍZ-TEMPERÁLÁS HATÁSÁNAK VIZSGÁLATA MELEGBEN TARTOTT ANYANYULAK TERMELÉSÉRETerhes, Katalin; Gerencsér, Zsolt; Szendrő, Zsolt; Nagy, István; Radnai, István; Kasza, Rozália; Matics, Zsolt; PhD hallgató; egyetemi oktató, kutatóTétel Korlátozottan hozzáférhető AZ IVÓVÍZ-TEMPERÁLÁS HATÁSÁNAK VIZSGÁLATA MELEGBEN TARTOTT NÖVENDÉKNYULAK TERMELÉSÉRETerhes, Katalin; Gerencsér, Zsolt; Szendrő, Zsolt; Nagy, István; Radnai, István; Kasza, Rozália; Matics, Zsolt; PhD hallgató; egyetemi oktató, kutatóTétel Korlátozottan hozzáférhető A kutatások gyakorlati hasznaMatics, Zsolt; Szendrő, Zsolt; Gerencsér, Zsolt; Szendrő, Katalin; egyetemi oktató, kutatóTétel Szabadon hozzáférhető Rabbit Lines Divergently Selected for Total Body Fat Content: Correlated Responses on Growth Performance and Carcass TraitsKasza, Rozália; Donkó, Tamás; Matics, Zsolt; Nagy, István; Csóka, Ádám; Kovács, György; Gerencsér, Zsolt; Dalle Zotte, Antonella; Cullere, Marco; Szendrő, Zsolt; egyetemi oktató, kutatóThe aim of this experiment was to study the effect of divergently selected rabbits for total body fat content (fat index) on growth performance and carcass traits. The fat index was determined at 10 weeks of age by computed tomography and lasted for four consecutive generations. The rabbits with the lowest fat index belonged to the lean line and those of the highest values belonged to the fat line. At generation four, 60 rabbits/line were housed in wire-mesh cages and fed with commercial pellet ad libitum from weaning (5 w of age) to slaughtering (11 w of age). Growth performance, dressing out percentage and carcass adiposity were measured. The lean line showed a better feed conversion ratio (p < 0.001) than the fat line. Furthermore, the carcass of the lean rabbits had the highest proportion of fore (p < 0.020) and hind (p < 0.006) parts. On the contrary, rabbits of the fat line had the highest carcass adiposity (p < 0.001). The divergent selection for total body fat content showed to be effective for both lean and fat lines. Selection for lower total body fat content could be useful for terminal male lines, while the selection for higher total body fat content could be an advantage for rabbit does in providing fat (energy) reserves.