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001-es BibID:	BIBFORM065052
035-os BibID:	(WoS)000387850600011 (Scopus)84995612349
Első szerző:	Halász András (agrármérnök)
Cím:	Weather regulated cattle behaviour on rangeland / Halasz A., Nagy, G., Tasi J., Bajnok M., Mikone J. E.
Dátum:	2016
ISSN:	1589-1623 1785-0037
Megjegyzések:	Cattle behaviour depends both on internal factors (breed, age, oestrus, hierarchy, body homeostasis) and external factors (air temperature, humidity, wind speed, paddock size, grass quality and quantity). In our study we present how weather conditions modify behaviour and daily walked distance. Direct observations of Hungarian grey cows and calves were carried out in Eastern Hungary on a rangeland called Hortobagy. Meteorological, spatial and behavioural data were collected using weather stations, GPS collars and ethogram recordings. Data showed a positive correlation between daily walked distance and atmospheric pressure (r=0.389, P<0.05). Animals consistently used the same daily routes and resting sites. Moreover, frequency of metabolic behaviour (grazing, rumination, drinking, defecation, and urination) depended significantly on type of weather fronts experienced on the day following the examined day (r=0.445, P<0.05). These weather fronts were classified according to the system developed by Peczely. In summary, our study suggests that Hungarian grey cattle show specific behavioural patterns during low-pressure conditions. Therefore, understanding their behavioural responses to different environmental factors may help to improve the handling techniques of extensively farmed beef cattle. As behavioural adaptation is usually driven by the neuroendocrine system, we suggest that this type of regulation could also depend on environmental changes, therefore, this relationship needs further research.
Tárgyszavak:	Agrártudományok Állattenyésztési tudományok idegen nyelvű folyóiratközlemény hazai lapban folyóiratcikk Biometeorology gps Cattle Behaviour Atmospheric Pressure Serotonin
Megjelenés:	Applied Ecology and Environmental Research. - 14 : 4 (2016), p. 149-158. -
További szerzők:	Nagy Géza (1952-) (agrármérnök) Tasi Julianna (1956-) (agrármérnök) Bajnok Márta (1975-) (agrármérnök) Jónás Edit (1974-) (agrármérnök)
Internet cím:	Szerző által megadott URL DOI Intézményi repozitóriumban (DEA) tárolt változat
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001-es BibID:	BIBFORM058390
Első szerző:	Halász András (agrármérnök)
Cím:	Optimised dairy cow feeding economy in Hungary / Andras Halasz, Edit Jónás
Dátum:	2014
ISSN:	1789-7874
Megjegyzések:	High yielder cows optimal feeding is always a major question in farm management. We attempted to find the optimal yield- and weight group in a Holstein_Freisian herd. Handled more than 2000 milk record samples and concluded that the optimal body weight is about 600-650 kg. Also step up from medium yielder to high yielder is more cost efficient than pushing the milk production over 30 kg milk daily. Our results show that fitness traits and body scores are major factors and every 50 kg of extra weight rises the forage cost in average of 0,11 ?cents. The mid-weight cows produce 25 kg of milk daily but the herds are very heterogeneous. The solution should be smaller cows, homogeneous herds and optimized feeding. Optimised dairy cow feeding economy in Hungary. Available from: https://www.researchgate.net/publication/275037788_Optimised_dairy_cow_feeding_economy_in_Hungary [accessed Apr 22, 2015].
Tárgyszavak:	Agrártudományok Állattenyésztési tudományok idegen nyelvű folyóiratközlemény hazai lapban Dairy Economy Feeding
Megjelenés:	Apstract. - 8 : 2-3 (2014), p. 69-72. -
További szerzők:	Jónás Edit (1974-) (agrármérnök)
Internet cím:	Intézményi repozitóriumban (DEA) tárolt változat
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