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Effect of supplemental lighting on puberty, follicular development, pituitary and serum concentrations of LH and hypothalamic content of GnRH in gilts

Published online by Cambridge University Press:  02 September 2010

K. E. Brandt ,
M. A. Diekman ,
D. M. Grieger  and
G. E. Moss
K. E. Brandt
Affiliation:
Department of Animal Sciences, Purdue University, West Lafayette, Indiana 47907, USA
M. A. Diekman
Affiliation:
Department of Animal Sciences, Purdue University, West Lafayette, Indiana 47907, USA
D. M. Grieger
Affiliation:
Department of Animal Sciences, Purdue University, West Lafayette, Indiana 47907, USA
G. E. Moss
Affiliation:
Department of Animal Sciences, Purdue University, West Lafayette, Indiana 47907, USA
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Abstract

One hundred and thirty crossbred gilts (Yorkshire × Duroc × Hampshire) were exposed to either natural (40 lux) or supplemental lighting (700 lux) beginning at 8 weeks of age. Gilts received supplemental lighting from 40-W flourescent bulbs from 05·15 to 09·00 h and 16·30 to 20·15 h from 9 September to 22 April. At 4 months of age, all gilts were exposed daily for 15 min to mature boars five times weekly. Twelve gilts from each group were slaughtered at 4, 5, 6 and 7 months of age. All gilts were bled from indwelling cannulas at 20-min intervals for 4 h the day preceding slaughter. In addition, blood samples were drawn weekly from 17 gilts in each group from 7 to 9 months of age and analysed for progesterone to determine age of puberty. Twelve of 17 gilts that received supplemental lighting reached puberty at 228 (s.e. 11) days of age whereas 11 of 16 gilts that received natural lighting reached puberty at 252 (s.e. 7) days of age (P = 0·07). No significant differences occurred in anterior pituitary gland weight or pituitary concentration of LH, mean concentrations of serum LH or number of LH secretory spikes between natural and supplemental-lighted gilts at each month (all P > 005). Concentration of oestradiol-17β and progesterone in follicular fluid was similar between treatment groups within months and follicular size (P > 0·05). Content of GnRH in the stalk-median eminence, preoptic area and hypothalamus proper were also similar between treatment groups (P > 0·05). In summary, supplemental lighting reduced the age of puberty in gilts without a detectable change in pituitary, hypothalamic or ovarian parameters.

Keywords

folliclesgiltslightingpuberty
Type
Research Article
Information
Animal Production , Volume 51 , Issue 2 , October 1990 , pp. 365 - 373
Copyright
Copyright © British Society of Animal Science 1990

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References

REFERENCES

Ainsworth, L., Tsang, B. K., Downey, B. R., Marcus, G. J. and Armstrong, D. T. 1980. Interrelationship between follicular fluid steroid levels, gonadotropic stimuli, and oocyte maturation during preovulatory development of porcine follicles. Biology of Reproduction 23: 621–627.CrossRefGoogle ScholarPubMed
Armstrong, J. D., Britt, J. H. and Cox, N. M. 1986. Seasonal differences in function of the hypothalamichypophysial-ovarian axis in weaned primiparous sows. Journal of Reproduction and Fertility 78: 11–20.CrossRefGoogle ScholarPubMed
Brandt, K. E., Diekman, M. A., Green, M. L. and Malayer, J. R. 1986. Lack of circadian rhythm in serum concentrations of melatonin in prepubertal gilts. Journal of Animal Science 63: (Suppl. 1), p. 356 (Abstr.).Google Scholar
Chang, S. C. S., Jones, J. D., Ellefson, R. D. and Ryan, R. J. 1976. The porcine ovarian follicle: I. Selected chemical analysis of follicular fluid at different developmental stages. Biology of Reproduction 15: 321–328.CrossRefGoogle ScholarPubMed
Christenson, R. K. 1981. Influence of confinement and season of the year on puberty and estrous activity in gilts. Journal of Animal Science 52: 821–830.CrossRefGoogle ScholarPubMed
Day, M. L., Imakawa, K., Garcia-winder, M., Zalesky, D. D., Schanbacher, B. D., Kittok, R. J. and Kinder, J. E. 1984. Endocrine mechanism of puberty in heifers: estradiol negative feedback regulation of luteinizing hormone secretion. Biology of Reproduction 31: 332–341.CrossRefGoogle ScholarPubMed
Diekman, M. A. and Hoagland, T. A. 1983. Influence of supplemental lighting during periods of increasing or decreasing daylength on the onset of puberty in gilts. Journal of Animal Science 57: 1235–1242.CrossRefGoogle ScholarPubMed
Diekman, M. A. and Trout, W. E. 1984. Serum profiles of progesterone, LH, FSH and prolactin immediately preceding induced puberty in gilts. Journal of Animal Science 56: 139–145.CrossRefGoogle Scholar
Diekman, M. A., Trout, W. E. and Anderson, L. L. 1983. Serum profiles of LH, FSH and prolactin from 10 weeks of age until puberty in gilts. Journal of Animal Science 56: 139–145.CrossRefGoogle ScholarPubMed
Esbenshade, K. L., Paterson, A. M., Cantley, T. C. and Day, B. N. 1982. Changes in plasma hormone concentrations associated with the onset of puberty in the gilt. Journal of Animal Science 54: 320–324.CrossRefGoogle ScholarPubMed
Gonzalez-Padilla, E., Wiltbank, J. N. and Niswender, G. D. 1975. Puberty in beef heifers. I. The interrelationship between pituitary, hypothelamic and ovarian hormones. Journal of Animal Science 40: 1091–1104.CrossRefGoogle Scholar
Gossett, J. W. and Sorensen, A. M. 1959. The effects of two levels of energy and season on reproductive phenomena of gilts. Journal of Animal Science 18: 40–47.CrossRefGoogle Scholar
Grieger, D. M., Brandt, K. E. and Diekman, M. A. 1986. Follicular fluid concentrations of estradiol-17β and progesterone and secretory patterns of LH and FSH in prepubertal gilts reared in confinement or outdoor lots. Journal of Animal Science 62: 751–758.CrossRefGoogle ScholarPubMed
Hoagland, T. A., Diekman, M. A. and Malven, P. V. 1981. Failure of stress and supplemental lighting to affect release of prolactin in swine. Journal of Animal Science 53: 467–472.CrossRefGoogle ScholarPubMed
Ireland, J. J. and Roche, J. F. 1982. Development of antral follicles in cattle after prostaglandin-induced luteolysis: changes in serum hormones, steroids in follicular fluid, and gonadotrophin receptors. Endocrinology 111: 2077–2086.CrossRefGoogle Scholar
Kesler, D. J., Garverick, H. A., Youngquist, R. S., Elmore, R. G. and Bierschwal, C. J. 1977. Effect of days postpartum and endogenous reproductive hormones in GnRH-induced LH release in dairy cows. Journal of Animal Science 45: 797–803.CrossRefGoogle ScholarPubMed
Long, G. G. and 1984. Effect of purified zearalenone on early gestation in gilts. Journal of Animal Science 59: 1662–1670.CrossRefGoogle ScholarPubMed
Lutz, J. B., Rampacek, G. B., Kraeling, R. R. and Pinkert, C. A. 1984. Serum luteinizing hormone and estrogen profiles before puberty in the gilt. Journal of Animal Science 58: 686–691.CrossRefGoogle ScholarPubMed
McConnell, S. J. and Ellendorff, F. 1987. Absence of nocturnal plasma melatonin surge under long and short artificial photoperiods in the domestic sow. Journal of Pineal Research 4: 201–210.CrossRefGoogle ScholarPubMed
Mavrogenis, A. P. and Robison, O. W. 1976. Factors affecting puberty in swine. Journal of Animal Science 42: 1251–1255.CrossRefGoogle ScholarPubMed
Nett, T. M. and Adams, T. E. 1977. Further studies on the radioimmunoassay of gonadotrophin-releasing hormone: effect of radioiodination, antiserum and unextracted serum on levels of immuno-reactivity in serum. Endocrinology 101: 1135–1144.CrossRefGoogle Scholar
Niswender, G. D. 1973. Influence of the site of conjugation on the specificity of antibodies to progesterone. Steroids 22: 413–424.CrossRefGoogle ScholarPubMed
Niswender, G. D., Reichert, L. E. and Zimmerman, D. R. 1970. Radioimmunoassay of serum levels of luteinizing hormone throughout the estrous cycle in pigs. Endocrinology 87: 576–580.CrossRefGoogle ScholarPubMed
Ntunde, B. N., Hacker, R. R. and King, G. J. 1979. Influence of photoperiod on growth, puberty and plasma LH levels in gilts. Journal of Animal Science 48: 1401–1406.CrossRefGoogle ScholarPubMed
Rampacek, G. B., Kraeling, R. R., Kiser, T. E. and Russell, R. B. 1981. Delayed puberty in gilts in total confinement. Theriogenology 15: 491–499.CrossRefGoogle ScholarPubMed
Ryan, K. D. and Foster, D. L. 1980. Neuroendocrine mechanisms involved in onset of puberty in the female: concepts derived from the lamb. Federation Proceedings 39: 2372–2377.Google ScholarPubMed
Sorensen, A. M., Thomas, W. W. and Gossett, J. W. 1961. A further study of the influence of level of energy intake and season on reproductive performance of gilts. Journal of Animal Science 20: 347–349.Google Scholar
Steel, R. G. D. and Torrie, J. H. 1980. Principles and Procedures of Statistics. 2nd ed. McGraw-Hill, New York.Google Scholar
Trout, W. E., Diekman, M. A., Parfet, J. R. and Moss, G. E. 1984. Pituitary responsiveness to GnRH, hypothalamic content of GnRH and pituitary LH and FSH concentrations immediately preceding puberty in gilts. Journal of Animal Science 58: 1423–1431.CrossRefGoogle ScholarPubMed
Wise, M. E., Faltys, G. L. and Zimmerman, D. R. 1981. Luteinizing hormone secretion from birth to puberty in the gilt. Journal of Animal Science 53: Suppl. 1, p. 377 (Abstr.).Google Scholar
Zimmerman, D. R. 1981. Age at puberty as affected by light period. Proceedings of the 21st Annual George A. Young Specific Pathogen Free Conference, University of Nebraska, pp. 13–16.Google Scholar