Exposure of pregnant dairy heifer to magnetic fields at 60 Hz and 30 μT

Bioelectromagnetics

Volumn 28, Issue 6, 2007, Pages 471-476

  Burchard, J F ^a   Nguyen, D H ^b   Monardes, H G ^a  

^a MCGILL UNIVERSITY   (Canada)

^b HYDRO QUÉBEC   (Canada)

Author keywords

Dairy cattle; ELF; IGF 1; Magnetic field; Melatonin; Progesterone; Prolactin

Indexed keywords

ANTHROPOMETRY; BLOOD; HEALTH HAZARDS; HORMONES; MAGNETIC FIELDS;

BODY WEIGHT; DAIRY CATTLES; ELF; EXPOSED TO; INSULIN-LIKE GROWTH FACTOR-1; LIGHT CYCLES; MAGNETIC-FIELD; MELATONIN; PROGESTERON; PROLACTIN;

ANIMALS;

MELATONIN; PROGESTERONE; PROLACTIN; SOMATOMEDIN C; HORMONE;

ANIMAL EXPERIMENT; ARTICLE; BODY WEIGHT; CONTROLLED STUDY; DAIRY CATTLE; FEMALE; FOOD INTAKE; GESTATIONAL AGE; HEALTH HAZARD; HEIFER; MAGNETIC FIELD; NONHUMAN; PREGNANCY; PRIORITY JOURNAL; WEIGHT GAIN; ANIMAL; BLOOD; BREEDING; CATTLE; DAIRYING; ELECTROMAGNETIC FIELD; ENVIRONMENTAL EXPOSURE; RADIATION DOSE; RADIATION EXPOSURE; RADIATION RESPONSE;

ANIMALIA; BOS;

ANIMALS; CATTLE; DAIRYING; DOSE-RESPONSE RELATIONSHIP, RADIATION; ELECTROMAGNETIC FIELDS; FEMALE; HORMONES; MATERNAL EXPOSURE; PREGNANCY; PREGNANCY, ANIMAL; RADIATION DOSAGE;

EID: 36049027432     PISSN: 01978462     EISSN: 1521186X     Source Type: Journal    
DOI: 10.1002/bem.20325     Document Type: Article

References (26)

1. Burchard JF, Nguyen DH, Richard L, Block E. 1996. Biological effects of electric and magnetic fields on productivity of dairy cattle. J Dairy Sci 79:1549-1554.
2. Burchard JF, Nguyen DH, Block E. 1998a. Effects of electric and magnetic fields on nocturnal melatonin concentrations in dairy cows. J Dairy Sci 81:722-727.
3. Burchard JF, Nguyen DH, Block E. 1998b. Progesterone concentrations during estrous cycle of dairy cows exposed to electric and magnetic fields. Bioelectromagnetics 19:438-443.
4. Burchard JF, Nguyen DH, Richard L, Young SN, Heyes MP, Block E. 1998c. Effects of electromagnetic fields on the levels of biogenic amine metabolites, quinolenic acid, and beta-endorphin in the cerebrospinal fluid in dairy cows. Neurochem Res 23:1527-1531.
5. Burchard JF, Nguyen DH, Block E. 1999. Macro- and trace element concentrations in blood plasma and cerebrospinal fluid of dairy cows exposed to electric and magnetic fields. Bioelectromagnetics 20:358-364.
6. Burchard JF, Monardes H, Nguyen DH. 2003. Effect of 10 kV, 30 μT, 60 Hz electric and magnetic fields on milk production and feed intake in nonpregnant dairy cattle. Bioelectromagnetics 24:557-563.
7. Burchard JF, Nguyen DH, Monardes HG, Petitclerc D. 2004. Lack of effect of 10 kV/m 60Hz electric field exposure on pregnant dairy heifer hormones. Bioelectromagnetics 25:308-312.
8. Burchard JF, Nguyen DH, Rodriguez M. 2006. Plasma concentrations of thyroxine in dairy cows exposed to 60 Hz electric and magnetic fields. Bioelectromagnetics 27:553-559.
9. CCAC. 1984. Guide to the care and use of experimental animals, Vol. 2. Ottawa, Ont., Canada: Canadian Council on Animal Care.
10. Dahl GE, Buchanan B A, Tucker HA. 2000. Photoperiodic effects on dairy cattle: A review. J Dairy Sci 83:885-893.
11. Dominique BMF, Wilson PR, Dellow DW, Barry TN. 1992. Effect of subcutaneous melatonin implants during long day length on voluntary feed intake, rumen capacity and heart rate of red deer fed a forage diet. Br J Nutr 68:77-88.
12. Fraser S, Cowen P, Franklin M, Franey C, Arendt J. 1983. Direct radioimmunoassay for melatonin in plasma. Clin Chem 29:396-397.
13. León HV, Hernández-Cerón J, Keisler DH, Gutierrez CG. 2004. Plasma concentrations of leptin, insulin-like growth factor-I, and insulin in relation to changes in body condition score in heifers. J Anim Sci 82:445-451.
14. Mäntysaari P, Ingvartse KL, Toivonen V. 1999. Feeding intensity of pregnant heifers. Effect of feeding intensity during gestation on performance and plasma parameters of primiparous Ayrshire cows. Livestock Prod Sci 62:29-41.
15. Miller ARE, Stanisiewski EP, Erdman RA, Douglass LW, Dahl GE. 1999. Effects of long daily photoperiod and bovine somatotropin (Trobesta) on milk yield in cows. J Dairy Sci 82:1716-1722.
16. Muthuramalingam P, Kennedy AD, Berry RJ. 2006. Plasma melatonin and insulin-like growth factor-1 responses to dim light at night in dairy heifers. J Pineal Res 40:225-229.
17. Nguyen DH, Richard L, Burchard J. 2005. Exposure chamber for determining the biological effects of electric and magnetic fields on dairy cows. Bioelectromagnetics 26:138-144.
18. Nosbush BB, Linn JG, Eisenbeisz WA, Wheaton JE, White ME. 1996. Effect of concentrate source and amount in diets on plasma hormone concentrations of prepubertal heifers. J Dairy Sci 79:1400-1409.
19. NRC. 2001. Nutrient requirements of dairy cattle. Washington DC: National Academy Press.
20. Petitclerc D, Chapin LT, Emery RS, Tucker HA. 1983. Body growth, growth hormone, prolactin and puberty response to photoperiod and plane of nutrition in Holstein heifers. J Anim Sci 57:892-898.
21. Ratkowsky D, Evans M, Alldredge JR. 1993. Cross-over experiments design, analysis and application. New York, NY: Marcel Decker.
22. Rodriguez M, Petitclerc D, Nguyen DH, Block E, Burchard JF. 2002. Effect of electric and magnetic fields (60 Hz) on production, and levels of growth hormone and insulin-like growth factor 1 in lactating, pregnant cows subjected to short days. J Dairy Sci 85:2843-2849.
23. Rodriguez M, Petitclerc D, Burchard JF, Nguyen DH, Block E, Downey BR. 2003. Responses of the estrous cycle in dairy cows exposed to electric and magnetic fields (60 Hz) during 8-h photoperiods. Anim Repr Sci 77:11-20.
24. Rodriguez M, Petitclerc D, Burchard JF, Nguyen DH, Block E. 2004. Blood melatonin and prolactin concentrations in dairy cows exposed to 60 Hz electric and magnetic fields during eight-hour photoperiods. Bioelectromagnetics 25:508-515.
25. Takebe H, Shiga T, Kato M, Masada E. 1999. Research on Nervous and Endocrine Systems. In: Biological and health effects from exposure to power-line frequency electromagnetic fields. Omasha, Tokyo, Japan. pp 43-73
26. Wood AW, Armstrong SM, Sait ML, Devine L, Martin MJ. 1998. Changes in human plasma melatonin profiles in response to 50 Hz magnetic field exposure. J Pineal Res 25:116-127.