Energy, metabolism of young, unadapted calves

Research output: Thesisinternal PhD, WUAcademic

Abstract

<p>Calves reared for veal or other meat production are usually purchased before 2 weeks of age. The first weeks at the rearing unit represent a critical phase regarding their health. During this period calves are fed at a very low level. In this thesis, the energy metabolism of young, newly purchased calves, as affected by feeding level and ambient temperature, was studied. It was found that such calves are highly dependent upon body energy reserves due to restrictive feeding, their high maintenance requirements, and the low availability of nutrients from the diet. During this period, the response of these animals to temperature is not consistent with the current concept of thermoregulation. Thermal requirements are affected by the calf's posture (standing or lying). The influence of temperature on heat production of calves varies within a day. Part of this circadian fluctuation is related to the within day variation in time spent standing. The first 2 weeks after arrival the calves are not in a steady-state regarding their energy metabolism. Both the relationship between heat production and feeding level and heat production and temperature, change with time after arrival.
LanguageEnglish
QualificationDoctor of Philosophy
Awarding Institution
Supervisors/Advisors
  • Noordhuizen, J.P.T.M., Promotor, External person
  • Verstegen, Martin, Promotor
  • Arieli, A., Promotor, External person
Award date10 Dec 1993
Place of PublicationS.l.
Publisher
Print ISBNs9789054851868
Publication statusPublished - 1993

Fingerprint

energy metabolism
calves
heat production
feeding level
veal calves
temperature
meat production
thermoregulation
posture
animal behavior
nutrient availability
ambient temperature
rearing
heat
energy
diet

Keywords

  • calves
  • meat production
  • feeds
  • composition
  • chemistry
  • physiology

Cite this

@phdthesis{8c942e6d71e54a12b4f7259ff228edc0,
title = "Energy, metabolism of young, unadapted calves",
abstract = "Calves reared for veal or other meat production are usually purchased before 2 weeks of age. The first weeks at the rearing unit represent a critical phase regarding their health. During this period calves are fed at a very low level. In this thesis, the energy metabolism of young, newly purchased calves, as affected by feeding level and ambient temperature, was studied. It was found that such calves are highly dependent upon body energy reserves due to restrictive feeding, their high maintenance requirements, and the low availability of nutrients from the diet. During this period, the response of these animals to temperature is not consistent with the current concept of thermoregulation. Thermal requirements are affected by the calf's posture (standing or lying). The influence of temperature on heat production of calves varies within a day. Part of this circadian fluctuation is related to the within day variation in time spent standing. The first 2 weeks after arrival the calves are not in a steady-state regarding their energy metabolism. Both the relationship between heat production and feeding level and heat production and temperature, change with time after arrival.",
keywords = "kalveren, vleesproductie, voer, samenstelling, chemie, fysiologie, calves, meat production, feeds, composition, chemistry, physiology",
author = "J.W. Schrama",
note = "WU thesis 1713 Proefschrift Wageningen",
year = "1993",
language = "English",
isbn = "9789054851868",
publisher = "Schrama",

}

Schrama, JW 1993, 'Energy, metabolism of young, unadapted calves', Doctor of Philosophy, S.l..

Energy, metabolism of young, unadapted calves. / Schrama, J.W.

S.l. : Schrama, 1993. 139 p.

Research output: Thesisinternal PhD, WUAcademic

TY - THES

T1 - Energy, metabolism of young, unadapted calves

AU - Schrama, J.W.

N1 - WU thesis 1713 Proefschrift Wageningen

PY - 1993

Y1 - 1993

N2 - Calves reared for veal or other meat production are usually purchased before 2 weeks of age. The first weeks at the rearing unit represent a critical phase regarding their health. During this period calves are fed at a very low level. In this thesis, the energy metabolism of young, newly purchased calves, as affected by feeding level and ambient temperature, was studied. It was found that such calves are highly dependent upon body energy reserves due to restrictive feeding, their high maintenance requirements, and the low availability of nutrients from the diet. During this period, the response of these animals to temperature is not consistent with the current concept of thermoregulation. Thermal requirements are affected by the calf's posture (standing or lying). The influence of temperature on heat production of calves varies within a day. Part of this circadian fluctuation is related to the within day variation in time spent standing. The first 2 weeks after arrival the calves are not in a steady-state regarding their energy metabolism. Both the relationship between heat production and feeding level and heat production and temperature, change with time after arrival.

AB - Calves reared for veal or other meat production are usually purchased before 2 weeks of age. The first weeks at the rearing unit represent a critical phase regarding their health. During this period calves are fed at a very low level. In this thesis, the energy metabolism of young, newly purchased calves, as affected by feeding level and ambient temperature, was studied. It was found that such calves are highly dependent upon body energy reserves due to restrictive feeding, their high maintenance requirements, and the low availability of nutrients from the diet. During this period, the response of these animals to temperature is not consistent with the current concept of thermoregulation. Thermal requirements are affected by the calf's posture (standing or lying). The influence of temperature on heat production of calves varies within a day. Part of this circadian fluctuation is related to the within day variation in time spent standing. The first 2 weeks after arrival the calves are not in a steady-state regarding their energy metabolism. Both the relationship between heat production and feeding level and heat production and temperature, change with time after arrival.

KW - kalveren

KW - vleesproductie

KW - voer

KW - samenstelling

KW - chemie

KW - fysiologie

KW - calves

KW - meat production

KW - feeds

KW - composition

KW - chemistry

KW - physiology

M3 - internal PhD, WU

SN - 9789054851868

PB - Schrama

CY - S.l.

ER -