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001-es BibID:	BIBFORM117438
Első szerző:	Brassó Dóra Lili (állattenyésztő mérnök)
Cím:	The analysis of ostrich chick vitality / Lili Dóra Brassó, Renáta Knop, Zsófia Rózsáné Várszegi, István Komlósi
Dátum:	2023
ISSN:	1587-1282
Megjegyzések:	Examinations on ostrich chick vitality can help to improve the effectiveness of Hungarian ostrich husbandry and hatching technology. The investigations were carried out on an ostrich breeder farm in Eastern Hungary. For the analyses, the Tona et al. (2003) scoring system was applied presenting eight main criteria (activity, feather, condition, eyesight, the condition of navel and leg, the amount of the remaining shell membrane and egg content, and the size and tenderness of the abdomen). Most chicks (98.08%) were vigilant and had clean and dry feathers. There was no difference between the average hatching weights between May and August but a decreasing tendency was shown during the laying season. The vitality total score was above 90 in each evaluated month and was not affected by the hatching month. Our results revealed that the vitality of chicks was not affected by either the hatching month (P=0.51) or the weight category (P=0.11). Neither the hatching weight of chicks and leg condition were correlated (P=0.79). Results showed that the Tona scoring system with small modifications can be well applied to ostrich chicks. Practical on-farm usage of the system can be suggested as an aid in day-old chick evaluation. After individual marking of chicks, the investigation of growth and culling rate could be carried out for more precise conclusions, involving more farms and laying seasons.
Tárgyszavak:	Agrártudományok Állattenyésztési tudományok idegen nyelvű folyóiratközlemény hazai lapban folyóiratcikk ostrich chick vitality hatching month hatching weight weight categories Tona scoring system
Megjelenés:	Agrártudományi közlemények = Acta agraria Debreceniensis. - 2023 : 2 (2023), p. 35-40. -
További szerzők:	Knop Renáta (1983-) (állatorvos) Rózsáné Várszegi Zsófia (1975-) (agrármérnök) Komlósi István (1960-) (agrármérnök)
Pályázati támogatás:	EFOP-3.6.3-VEKOP-16-2017-00008 EFOP
Internet cím:	Intézményi repozitóriumban (DEA) tárolt változat Szerző által megadott URL
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001-es BibID:	BIBFORM106312
Első szerző:	Lugata, James Kachungwa (Ph.D hallgató)
Cím:	Effect of genotype on the hematological parameter of TETRA-SL and Hungarian Partridge coloured chickens at young age / James Kachungwa Lugata, Xénia Erika Ozsváth, Sawadi Fransisco Ndunguru, Gebrehaweria Reda Kidane, Renáta Knop, Eszter Angyal, János Oláh, Csaba Szabó
Dátum:	2022
ISSN:	1587-1282
Megjegyzések:	Indigenous chickens are well known for their dual-purpose function and palatable meat. However, the information on their hematology parameters is lacking and hence hampering the poultry industry production of local breeds. The main objective of this study was to examine the hematological parameters of Hungarian Partridge Coloured hen (HPC) and TETRA-SL (TSL) genotype and determine the hematological reference interval values. This trial was part of the larger experiment where a total of 200 chicks (HPC + TSL) were reared. For this trial the blood samples were obtained from brachial wing veins of 8 chicks of each genotype for blood hematological analysis. The results indicated that some of the hematological parameters such as red blood cells-RBC, white blood cells-WBC, hemoglobin-Hb, hematocrit-Ht, platelets-Plt, lymphocytes-LYM, and granulocytes-GRAN were significantly affected by the genotypes (p < 0.05). The genotype did not affect the mean corpuscular volume-MCV, mean corpuscular hemoglobin-MCH, mean corpuscular hemoglobin concentration-MCHC, and GRAN (p > 0.05). The hematological reference interval values were slightly higher in the TSL genotype compared to HPC chicks. It is concluded that genotype has a significant effect on the hematological parameters. The results from this trial will be help and design the baseline reference values for the HPC genotype which will be useful in assessing the health status of these indigenous chickens.
Tárgyszavak:	Agrártudományok Állattenyésztési tudományok idegen nyelvű folyóiratközlemény hazai lapban folyóiratcikk Hungarian Partridge coloured hen Hematology parameter TETRA-SL Genotype
Megjelenés:	Agrártudományi közlemények = Acta agraria Debreceniensis. - 2022 : 1 (2022), p. 99-104. -
További szerzők:	Ozsváth Xénia Erika Ndunguru, Sawadi Fransisco (1980-) Reda, Gebrehaweria Kidane (1986-) (Animal Sceince) Knop Renáta (1983-) (állatorvos) Angyal Eszter (1994-) (állatorvos doktor) Oláh János (1976-) (állattenyésztés) Szabó Csaba (1968-) (agrármérnök)
Pályázati támogatás:	EFOP-362-16-2017-00001 EFOP EFOP-3.6.3-VEKOP-16-2017-00008 EFOP-VEKOP
Internet cím:	Szerző által megadott URL DOI Intézményi repozitóriumban (DEA) tárolt változat
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001-es BibID:	BIBFORM130592
Első szerző:	Tóth Eszter (Állattenyésztési tudományok)
Cím:	Understanding leptin's influence on calf development: A review of metabolic and reproductive mechanisms / Eszter Tóth, József Rátky, János Posta, Renáta Knop
Dátum:	2025
ISSN:	1587-1282 2416-1640
Megjegyzések:	Leptin, a hormone primarily produced by adipose tissue, regulates the energy balance, metabolism, and reproductive functions. This review explores leptin's role in calf development from embryogenesis to puberty. Leptin expression is strongly influenced by the nutritional status, with circulating levels dependent on adipose tissue mass and modulated by metabolic hormones such as insulin and glucocortico ids. It plays a regulatory role in the embryonic cell division, adipogenesis, and postnatal energy metabolism. Additionally, leptin modulates appetite, the growth hormone secretion, and the reproductive system maturation. Its presence in the colostrum and milk highlights its significance in the early calf development, influencing the neonatal metabolism and immune function. As calves approach puberty, leptin serves as a key metabolic signal for reproductive maturation. A deeper understanding of leptin's multifunctional role in calf development could contrib ute to improved livestock growth and reproductive management strategies.
Tárgyszavak:	Agrártudományok Állattenyésztési tudományok idegen nyelvű folyóiratközlemény hazai lapban folyóiratcikk leptin hypothalamus adenohypophysis reproduction cattle
Megjelenés:	Agrártudományi közlemények = Acta agraria Debreceniensis. - 1 (2025), p. 145-153. -
További szerzők:	Rátky József (1960-) (állattenyésztés) Posta János (1978-) (informatika tanár, agrármérnök) Knop Renáta (1983-) (állatorvos)
Internet cím:	Szerző által megadott URL DOI Intézményi repozitóriumban (DEA) tárolt változat
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