Template-Type: ReDIF-Article 1.0 Author-Name: D. Kucharczyk Author-Workplace-Name: Department of Lake and River Fisheries, Department of Animal Biochemistry, Warmia and Mazury University in Olsztyn, Olsztyn-Kortowo, Poland Author-Name: R. Kujawa Author-Workplace-Name: Department of Lake and River Fisheries, Department of Animal Biochemistry, Warmia and Mazury University in Olsztyn, Olsztyn-Kortowo, Poland Author-Name: A. Mamcarz Author-Workplace-Name: Department of Lake and River Fisheries, Department of Animal Biochemistry, Warmia and Mazury University in Olsztyn, Olsztyn-Kortowo, Poland Author-Name: K. Targońska-Dietrich Author-Workplace-Name: Department of Lake and River Fisheries, Department of Animal Biochemistry, Warmia and Mazury University in Olsztyn, Olsztyn-Kortowo, Poland Author-Name: E. Wyszomirska Author-Workplace-Name: Institute of Public Health, Warsaw, Poland Author-Name: J. Glogowski Author-Workplace-Name: Institute of Animal Reproduction and Food Research of Polish Academy of Sciences, Olsztyn, Poland Author-Name: I. Babiak Author-Workplace-Name: Department of Lake and River Fisheries, Department of Animal Biochemistry, Warmia and Mazury University in Olsztyn, Olsztyn-Kortowo, Poland Author-Name: T. Szabó Author-Workplace-Name: Institute of Animal Husbandry, Gödöllö University of Agricultural Sciences, Gödöllö, Hungary Title: Induced spawning in bream (Abramis brama L.) using pellets containing GnRH Abstract: Wild spawners of common bream, Abramis brama, were caught in the Kortowskie Lake (north Poland) and transported to a hatchery for artificial spawning. Fish were hormonally induced using GnRH analogue combined with metoclopramide (ovopel). The results of bream reproduction in captivity were compared with fish treated with the combination of hCG and CPE and with control group injected saline. Males from treated groups produced significantly more milt (over 4.3 ml/kg vs. 2.1) of better qualities: spermatozoon concentration (over 9.3 × 109 vs. 6.8) and motility (over 85% vs. 62). Females from the control group did not spawn whereas those from hormonally induced groups ovulated: 62% after CPE treatment and 100% after GnRHa treatment. Generally, the fish after ovopel stimulation showed the best hatchery parameters. Keywords: controlled reproduction, spermiation, ovulation, incubation process Journal: Czech Journal of Animal Science Pages: 89-95 Volume: 50 Issue: 3 Year: 2005 DOI: 10.17221/4000-CJAS File-URL: http://cjas.agriculturejournals.cz/doi/10.17221/4000-CJAS.html File-Format: text/html X-File-Ref: http://agriculturejournals.cz/RePEc/caa/references/cjs-200503-0001.txt Handle: RePEc:caa:jnlcjs:v:50:y:2005:i:3:id:4000-CJAS Template-Type: ReDIF-Article 1.0 Author-Name: J. Wolf Author-Workplace-Name: Research Institute of Animal Production, Prague-Uhříněves, Czech Republic Author-Name: E. Žáková Author-Workplace-Name: Research Institute of Animal Production, Prague-Uhříněves, Czech Republic Author-Name: E. Groeneveld Author-Workplace-Name: Institute for Animal Breeding, Mariensee, Federal Agricultural Research Centre (FAL), Neustadt, Germany Title: Genetic parameters for a joint genetic evaluation of production and reproduction traits in pigs Abstract: The covariance structure was estimated by REML for a joint genetic evaluation of production and reproduction traits for Czech Landrace (58 258 records) and Czech Large White (167 161 records) pigs using four-trait animal models. The following traits were analysed: lean mean percentage at the end of the performance test in the field, estimated from ultrasonic measurements unadjusted for live weight (LM), average daily gain in field test (in g/day) calculated as weight at the end of the test divided by age at the end of the test (ADG), number of piglets born alive in parity 1 (NBA1) and number of piglets born alive in parity 2 and subsequent parities (NBA2+). The heritabilities were in the range from 0.30 to 0.37 for LM, from 0.13 to 0.18 for ADG, from 0.09 to 0.13 for NBA1 and from 0.10 to 0.14 for NBA2+, depending on the breed and on the model (herd-year-season random or fixed). Genetic correlations between production and reproduction traits were estimated to be non-zero. Correlations between traits caused by the herd-year-season effect were mostly positive. As a general conclusion, the joint genetic evaluation of production and reproduction traits is recommended. The herd-year-season effect should be preferably considered as random. Keywords: pig, production traits, reproduction traits, multi-trait animal model, genetic parameters Journal: Czech Journal of Animal Science Pages: 96-103 Volume: 50 Issue: 3 Year: 2005 DOI: 10.17221/4001-CJAS File-URL: http://cjas.agriculturejournals.cz/doi/10.17221/4001-CJAS.html File-Format: text/html X-File-Ref: http://agriculturejournals.cz/RePEc/caa/references/cjs-200503-0002.txt Handle: RePEc:caa:jnlcjs:v:50:y:2005:i:3:id:4001-CJAS Template-Type: ReDIF-Article 1.0 Author-Name: J. Kuchtík Author-Workplace-Name: Department of Animal Breeding, Mendel University of Agriculture and Forestry, Brno, Czech Republic Author-Name: H. Sedláčková Author-Workplace-Name: Department of Animal Breeding, Mendel University of Agriculture and Forestry, Brno, Czech Republic Title: Effect of some non-genetic factors on the growth of kids of the brown short-haired breed Abstract: The evaluation of effects of some non-genetic factors (sex, litter size, age of dams and year of study) on the growth of 85 kids of the Brown Short-haired breed was carried out in a period of two successive years. The analysis of the growth of all kids revealed that in the time interval from birth to Day 90 of age daily gain and final body weight were 181.3 g and 19.52 kg, respectively. As far as the effect of sex was concerned, the intensity of growth was significantly higher in males than in females (P ≤ 0.01) in all periods under study. From birth to Day 90, the respective daily gains of males and females were 200.6 g and 162.0 g. As far as the litter size was concerned, it was found out that daily gains of singles and triplets were higher than those of twins and that the differences between single kids and twins were significant (P ≤ 0.01) in all periods under study. Specifically, daily gains of single kids, twins and triplets in the time interval from birth to Day 90 were 201.4 g; 167.1 g and 175.6 g, respectively. The analysis of the effect of age of dams on daily gains revealed significant effects of this factor on daily gains in the time intervals of Day 30 - Day 60; Day 60 - Day 90; Day 30 - Day 90 and from birth to Day 90 (P ≤ 0.05). With the exception of the period from birth to Day 30, the highest daily gains were recorded in kids of four-years-old dams in all other periods under study. In both years of study, all kids were reared under nearly identical conditions but the effect of year of study on the growth was significant. Keywords: goat, growth traits, kid, brown short-haired Journal: Czech Journal of Animal Science Pages: 104-108 Volume: 50 Issue: 3 Year: 2005 DOI: 10.17221/4002-CJAS File-URL: http://cjas.agriculturejournals.cz/doi/10.17221/4002-CJAS.html File-Format: text/html X-File-Ref: http://agriculturejournals.cz/RePEc/caa/references/cjs-200503-0003.txt Handle: RePEc:caa:jnlcjs:v:50:y:2005:i:3:id:4002-CJAS Template-Type: ReDIF-Article 1.0 Author-Name: G. Chládek Author-Workplace-Name: Department of Animal Breeding, Mendel University of Agriculture and Forestry, Brno, Czech Republic Author-Name: J. Žižlavský Author-Workplace-Name: Department of Animal Breeding, Mendel University of Agriculture and Forestry, Brno, Czech Republic Author-Name: J. Šubrt Author-Workplace-Name: Department of Animal Breeding, Mendel University of Agriculture and Forestry, Brno, Czech Republic Title: A comparison of carcass proportions in Czech Pied and Montbeliarde bulls with a high carcass weight Abstract: The aim of the experiment was to compare the carcass composition of 20 Montbeliarde bulls (M) and 20 Czech Pied bulls (C). The carcass weight of the animals in one group varied minimally and was about 380 kg. The Montbeliarde bulls showed a higher growth rate, expressed by a significantly lower (P < 0.01) age at slaughter (562.6 vs. 626 days) while the live weight (682.9 vs. 690.6 kg) and carcass weight (380.4 vs. 382.6 kg) were comparable, which resulted in a significantly higher (P < 0.01) daily weight gain (1.142 vs. 1.045 kg) and net weight gain (0.676 vs. 0.615 kg). The Montbeliarde bulls showed a greater (P < 0.05) height at rump (144.0 vs. 140.2 cm), worse carcass conformation according to SEUROP (3.24 vs. 2.84), lower proportion of forequarter (44.7 vs. 45.7%) and higher proportion of hindquarter (55.3 vs. 54.3%). As for the carcass composition, no significant inter-breed differences were found in weights and proportions of shanks, meat trimmings, separable fat, bones, round, loin, filet, flank with rib, flank, shoulder and chuck. The Montbeliarde bulls had a significantly lower (P < 0.05) weight and proportion of neck (10.1 vs. 11.1 kg and 5.4 vs. 5.9%) and weight of brisket and rib (17.6 vs. 18.7 kg) and proportion of brisket and rib (9.4 vs. 9.9%, P < 0.01). Keywords: Czech Pied, Montbeliarde, beef, carcass value, carcass composition Journal: Czech Journal of Animal Science Pages: 109-115 Volume: 50 Issue: 3 Year: 2005 DOI: 10.17221/4003-CJAS File-URL: http://cjas.agriculturejournals.cz/doi/10.17221/4003-CJAS.html File-Format: text/html X-File-Ref: http://agriculturejournals.cz/RePEc/caa/references/cjs-200503-0004.txt Handle: RePEc:caa:jnlcjs:v:50:y:2005:i:3:id:4003-CJAS Template-Type: ReDIF-Article 1.0 Author-Name: L. Vališ Author-Workplace-Name: Research Institute of Animal Production, Prague-Uhříněves, Czech Republic Author-Name: J. Pulkrábek Author-Workplace-Name: Research Institute of Animal Production, Prague-Uhříněves, Czech Republic Author-Name: J. Pavlík Author-Workplace-Name: Research Institute of Animal Production, Prague-Uhříněves, Czech Republic Author-Name: M. Vítek Author-Workplace-Name: Research Institute of Animal Production, Prague-Uhříněves, Czech Republic Author-Name: J. Wolf Author-Workplace-Name: Research Institute of Animal Production, Prague-Uhříněves, Czech Republic Title: Conformation and meatiness of pork belly Abstract: Based on the results of dissections of 126 pig carcasses, the proportions of pork belly and its parts, i.e. belly with bones, belly without bones and tip of belly, were determined. In addition, proportions of lean meat, bones, intermuscular and subcutaneous fat were determined in belly with bones as percentages of the weight before the dissection. Lean meat content of carcass was the most important factor for determining the pork belly composition. The correlation between lean meat content of carcass and lean meat percentage of belly with bones was 0.92 ± 0.035. Sex and slaughter weight had a greater impact on the composition of pork belly than the crossbred combination. The lean meat percentage of belly with bones in gilts was higher by 4.4% than in barrows. For slaughter weights higher than 100 to 110 kg, lean meat content in pig belly decreased with increasing slaughter weight. Keywords: pig, belly, lean meat percentage, correlations Journal: Czech Journal of Animal Science Pages: 116-121 Volume: 50 Issue: 3 Year: 2005 DOI: 10.17221/4004-CJAS File-URL: http://cjas.agriculturejournals.cz/doi/10.17221/4004-CJAS.html File-Format: text/html X-File-Ref: http://agriculturejournals.cz/RePEc/caa/references/cjs-200503-0005.txt Handle: RePEc:caa:jnlcjs:v:50:y:2005:i:3:id:4004-CJAS Template-Type: ReDIF-Article 1.0 Author-Name: M. Pešek Author-Workplace-Name: Faculty of Agriculture, University of South Bohemia, České Budějovice, Czech Republic Author-Name: J. Špička Author-Workplace-Name: Faculty of Agriculture, University of South Bohemia, České Budějovice, Czech Republic Author-Name: E. Samková Author-Workplace-Name: Faculty of Agriculture, University of South Bohemia, České Budějovice, Czech Republic Title: Comparison of fatty acid composition in milk fat of Czech Pied cattle andHolsteincattle Abstract: In May 2003 differences in milk fat composition in two main dairy breeds in the Czech Republic, Czech Pied cattle and Holstein cattle, were studied in two uniform groups, each containing eight cows. The groups were housed together and received the same daily diet. Fatty acids were determined in mean milk samples from the individual cows as their methyl esters using a gas chromatography procedure. The groups of the fatty acids, namely saturated (SAFA), monounsaturated (MUFA) and polyunsaturated (PUFA) ones, were examined together with the individual acids. The milk fat of Czech Pied cattle was found to contain significantly less SAFAs than the fat of Holstein cows (60.78 and 63.62% of total acids; P < 0.05). Determined mean MUFA contents (27.64 and 25.76%) and total levels (34.31 and 32.11%) of all the unsaturated acids (MUFAs and PUFAs) were insignificantly elevated in the milk fat of Czech Pied cattle. The contents of the most of the individual fatty acids did not differ considerably between the breeds. In Holstein cows, significantly higher contents (P < 0.05) of capric acid (C10:0) and stearic acid (C18:0) 3.30 and 4.45%, respectively, as compared with 2.69 and 2.61% for Czech Pied cows, were observed. The milk fat of Czech Pied cows had significantly higher contents of oleic acid (C18:1) 23.60% (P < 0.05) and of an isomer of octadecatrienic acid (C18:3n4) 0.16% (P < 0.001) as compared with 21.68 and 0.10%, respectively, in the fat ofHolstein cows. Keywords: cows, breeds, Czech Pied cattle, Holstein cattle, milk fat, fatty acids Journal: Czech Journal of Animal Science Pages: 122-128 Volume: 50 Issue: 3 Year: 2005 DOI: 10.17221/4005-CJAS File-URL: http://cjas.agriculturejournals.cz/doi/10.17221/4005-CJAS.html File-Format: text/html X-File-Ref: http://agriculturejournals.cz/RePEc/caa/references/cjs-200503-0006.txt Handle: RePEc:caa:jnlcjs:v:50:y:2005:i:3:id:4005-CJAS Template-Type: ReDIF-Article 1.0 Author-Name: E. Tůmová Author-Workplace-Name: Department of Animal Husbandry, Czech University of Agriculture, Prague, Czech Republic Author-Name: T. Ebeid Author-Workplace-Name: Department of Animal Husbandry, Czech University of Agriculture, Prague, Czech Republic Title: Effect of time of oviposition on egg quality characteristics in cages and in a litter housing system Abstract: Two experiments were carried out to investigate the effect of the time of oviposition on egg quality characteristics in two different housing systems (cages vs. litter). ISA brown hens from 20 to 64 weeks of age were housed in battery cages (550 cm2/hen, 19 526 laying hens in the house) and on deep litter (7 hen/m2, 4 652 laying hens in the house). In both houses, eggs were collected daily at three oviposition times 06:00, 10:00 and 14:00 h. Every four weeks, 90 eggs for each house (30 eggs for each oviposition time) were used for egg quality assessment. The results indicated that in cages the highest percentages (P ≤ 0.001) of normal (74.47%), non-standard (0.85%) and cracked (1.80%) eggs were laid in the early morning (06:00 h). On deep litter, however, the highest percentages (P ≤ 0.05) of normal sound eggs were produced at10:00 h (35.43%) and at14:00 h (33.03%). In the cage system, the heaviest eggs (63.01 g) were laid in the early morning (06:00 h) and the highest shell percentage (10.33%) was in eggs laid in the afternoon and also at 10:00 h (10.31%). On the other hand, in the litter housing system, the time of oviposition had no significant effect on egg weight and eggshell quality characteristics except for shell thickness. Morning eggs had greater shell thickness (0.398 mm) than afternoon eggs (0.390 mm). In cages and on litter, statistically significant differences in albumen height, albumen index and Haugh Units were observed between early morning eggs and afternoon eggs and data showed a pattern of relatively higher albumen quality for eggs collected in the afternoon in both systems. Keywords: cages, deep litter, oviposition time, egg weight, shell quality, albumen quality, yolk quality Journal: Czech Journal of Animal Science Pages: 129-134 Volume: 50 Issue: 3 Year: 2005 DOI: 10.17221/4006-CJAS File-URL: http://cjas.agriculturejournals.cz/doi/10.17221/4006-CJAS.html File-Format: text/html X-File-Ref: http://agriculturejournals.cz/RePEc/caa/references/cjs-200503-0007.txt Handle: RePEc:caa:jnlcjs:v:50:y:2005:i:3:id:4006-CJAS