Cited by 53Effects of Environmental Stressors on LivestockAnimal Behavior and Welfare StudiesAnimal health and immunology

The effects of different environmental conditions on thermoregulation and clinical and hematological variables in long-distance road-transported calves1

Bernardini, D., Gerardi, G., Peli, A., Nanni Costa, L., Amadori, M., Segato, S.·2012·Journal of Animal Science

Abstract

The aim of this study was to investigate the effects of long-distance road transport (19 h, from Poland to Italy) during 2 seasons (summer vs. winter) on clinical and hematological variables in calves. The environmental temperature range that could compromise the thermoregulation system (thermal stress) of the calves was tested. For the 7 Holstein calves in each transport, the BW and rectal temperature (RT) were measured, and blood samples were collected at the farm of origin, before loading at the transit center (T2), after unloading at the farm of destination (T3), and 1, 2, 3, and 4 d after arrival. The body temperature (BT) and heart rate (HR) were continuously monitored from T2 to T3. The data were statistically analyzed according to a mixed model that considered the fixed effects of transport (repeated measurements), season of journey, and their interaction. Within the observed temperature-humidity index (THI) range (30 to 80), effective thermoregulation allowed the calves to maintain their BT with small physiologic changes to prevent thermal stress, particularly in the summer. With no seasonal differences, the HR was greater at loading than unloading (120 vs. 115 beats per min; P = 0.012). As for the transport effect, the BW was less (P < 0.001) after unloading, and the RT was greater (P = 0.004). This effect was more marked in summer. The hematological variables indicated a moderate effect of transport on the hydration condition, reactive and muscular systems, and metabolism, although hematocrit (P = 0.004), erythrocytes, cortisol, NEFA, β-hydroxybutyrate, lactate, creatine kinase, lactate dehydrogenase, and aspartate aminotransferase activity (P < 0.001), and total protein (P = 0.007) were greater after unloading. This was confirmed by a moderate decrease in total leukocytes (P = 0.031) and glucose concentration (P = 0.002). The changes in the clinical variables were similar for both seasons even though in the summer, hematocrit (P < 0.001), urea (P = 0.008), and total protein (P = 0.010) increased and glucose concentration (P = 0.038) decreased. In conclusion, the data did not show a pronounced effect attributable to the season of the journey. Long-distance road transport leads to notable changes in clinical and hematological variables at the end of the journey. However, these variables remained within their physiological ranges and returned to basal values within a few days after the journey.

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Crossref · 10.2527/jas.2011-4113

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  • The impact of altered physiological status and health of calves during and after transport is triggered by a combination of factors including reduced feed and water intake, increased physiological and physical stressors, muscle fatigue and immunosuppression.

    “The impact of altered physiological status and health of calves during and after transport has been well documented and has been shown to be triggered by a combination of factors including a reduction in feed and water intake, and increased physiological and physical stressors, muscle fatigue and immunosuppression [3–9].”
  • Indicators of dehydration such as blood urea and lactate display more variability and may gradually return to normal levels over a span of one to five weeks post-arrival.

    “However, indicators of dehydration such as blood urea and lactate display more variability and may gradually return to normal levels over a span of one to five weeks post-arrival [4, 11].”
  • Transport of 18-20 h has been shown to negatively alter hematology and biochemistry.

    “Transport (18–20 h) has been shown to negatively alter hematology (16) and biochemistry (11), and even short transport (2h) was shown to increase cortisol levels (17).”
  • These results reinforce conclusions drawn from previously published research data for calves transported over land for short and long durations, although these studies did not include a combination of ferry and lorry transport.

    “Regardless, these results reinforce conclusions drawn from previously published research data for calves transported over land for short and long durations (11, 16, 27), although these studies did not include a combination of ferry and lorry transport.”
  • Higher levels of plasma cortisol, NEFA, urea, BHB, packed cell volume, neutrophils, basophils, and total white blood cell numbers are commonly found in calves upon arrival at the veal farm compared with pretransport values.

    “Higher levels of plasma cortisol, nonesterified fatty acids (NEFA), urea, BHB, packed cell volume, neutrophils, basophils, and total white blood cell numbers are commonly found in calves upon arrival at the veal farm (Knowles et al., 1997”

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Authors
Bernardini, D., Gerardi, G., Peli, A., Nanni Costa, L., Amadori, M., & Segato, S.
Affiliations
  • University of Padua (IT)
  • University of Bologna (IT)
  • Istituto Zooprofilattico Sperimentale della Lombardia e dell'Emilia Romagna "Bruno Ubertini" (IT)
Venue
Journal of Animal Science
Published
2012-04-01
Volume
90
Issue
4
Pages
1183-1191
ISSN
  • 0021-8812 (ISSN-L)
  • 1525-3163
OpenAlex
W2071975154
Cited by
53
References
39
Citations by year
2026: 3 · 2025: 3 · 2024: 3 · 2023: 4 · 2022: 7 · 2021: 6 · 2020: 6 · 2019: 2 · 2018: 4 · 2016: 6 · 2015: 2 · 2014: 2 · 2013: 4 · 2012: 1
FWCI
3.76
Type
journal article
Language
en
Open access
closed
Locations
  • Journal of Animal Science (publishedVersion)
  • PubMed (publishedVersion)
  • Archivio istituzionale della ricerca (Alma Mater Studiorum Università di Bologna) (submittedVersion)
  • Padua Research Archive (University of Padova) (submittedVersion)
Topics
  • Life Sciences › Agricultural and Biological Sciences › Animal Science and Zoology › Effects of Environmental Stressors on Livestock
  • Health Sciences › Veterinary › Small Animals › Animal Behavior and Welfare Studies
  • Health Sciences › Veterinary › Small Animals › Animal health and immunology
Keywords
calves, thermoregulation, thermal stress (biology), Holstein cows, hematological parameters, clinical factors, heart rate, body temperature, rectal temperature, cortisol, creatine kinase, lactate dehydrogenase, aspartate aminotransferase, beta-hydroxybutyrate, NEFA, hydration, seasonal variation, temperature-humidity index
MeSH terms
Animals, Animal Husbandry, Body Temperature, Body Temperature Regulation, Cattle, Erythrocyte Count, Heart Rate, Hematocrit, Leukocyte Count, Male, Transportation

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