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Effect of pattern of lighting and time of birth on occurrence of puberty in female goat kids

Published online by Cambridge University Press:  02 September 2010

E. A. Amoah  and
M. J. Bryant
E. A. Amoah
Affiliation:
Department of Agriculture and Horticulture, University of Reading, Earley Gate, Reading RG6 2AT
M. J. Bryant
Affiliation:
Department of Agriculture and Horticulture, University of Reading, Earley Gate, Reading RG6 2AT
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Abstract

Thirty-six British Saanen female kids, born between either 20 March and 6 April (E) or 10 April and 16 June (L), were reared under three different patterns of lighting — a constant 18-h light: 6-h dark (C); or a weekly step-wise reduction from 18-h to 10-h light: 14-h dark over 10 weeks, commencing at either 6 (R6) or 10 (R10) weeks of age. Vasectomized males were used to test for oestrus; blood samples were collected to determine plasma progesterone concentration. Thirty-three goats attained puberty; all but two kids showed oestrus at first ovulation. The mean ( ± s.d.) age and live weight at puberty were 174·6 (± 4·1) and 141·7 (± 4·3) days (P < 0·001), and 28·6 (± 0·9) and 22·8 (± 1·0) kg (P < 0·001), for E and L treatments, respectively. For R6, R10 and C treatments, the ages and weights wer e 151·6 (± 4·7), 160·4 (± 5·2) and 164·7 (± 4·9) days (NS), respectively, and 24·5 (± 1·1), 25·3 (± 1·2) and 27·8 (± 1·1) kg (NS), respectively. A significant date of birth × lighting-pattern treatment interaction was found for date at puberty (P < 0·001), with puberty occurring earlier for E than L kids only when a reduction in daylength occurred. Puberty occurred earlier on R6 than R10 treatments only for L kids.

Type
Research Article
Information
Animal Production , Volume 38 , Issue 1 , February 1984 , pp. 83 - 89
Copyright
Copyright © British Society of Animal Science 1984

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References

REFERENCES

AMOAH, E. A. and Bryant, M. J. 1980. The effect of, reduction in day-length and season of birth upon the occurrence of puberty in the female goat. Anim. Prod. 30: 480–481 (Abstr.).Google Scholar
Asdell, S. A. 1926. Variation in the onset of the breeding year of the goat. J. agric. Sci., Camb. 16: 632–639.CrossRefGoogle Scholar
Bissonnette, T. H. 1941. Experimental modification of breeding cycles in goats. Physiol. Zool. 14: 379–383.CrossRefGoogle Scholar
Bondurant, R. H., Darien, B. J., Munro, C. J., Stabenfeldt, G. H. and Wang, P. 1981. Photoperiod induction of fertile oestrus and changes in LH and progesterone concentrations in yearling dairy goats (Capra hircus). J. Reprod. & Fert. 63: 1–9.CrossRefGoogle ScholarPubMed
Ducker, M. J., Bowman, J. C. and Temple, Anne. 1973. The effect of constant photoperiod on the expression of oestrus in the ewe. J. Reprod. & Fert., Suppl. 19, pp. 143–150.Google Scholar
Dýrmundsson, Ó. R. 1973. Puberty and early reproductive performance in sheep. 1. Ewe lambs. Anim. Breed. Abstr. 41: 273–289.Google Scholar
Dýrmundsson, Ó. R. and Lees, J. L. 1972. Attainment of puberty and reproductive performance in Clun Forest ewe lambs. J. agric. Sci., Camb. 78: 39–45.CrossRefGoogle Scholar
Furr, B. J. A. 1973.Radioimmunoassay of progesterone on peripheral plasma of the domestic fowl in various physiological states and in follicular venous plasma. Ada endocr., Copenh. 72: 89N100.Google ScholarPubMed
Honeker, V. 1952. [Remarkable early maturity, pregnancy and birth in goat kids. Berl. Munch. tierarztl. Wschr. 65: 69.Google Scholar
Jones, D. E. and Knifton, A. 1972. Progesterone concentration in the peripheral plasma of goats during the oestrous cycle. Res. vet. Sci. 13: 193–195.CrossRefGoogle Scholar
Lamont, J. L. 1964. Influence of vasectomised bucks on the reproductive performance of Angora does. S. Afr. J. agric. Sci. 7: 305–310.Google Scholar
Land, R. B. 1978. Reproduction in young sheep: some genetic and environmental sources of variation.J. Reprod. & Fert. 52: 427–436.CrossRefGoogle ScholarPubMed
Ott, R. S., Nelson, D. R. and Hixon, J. E. 1980. Effect of presence of the male on initiation of estrous cycle activity of goats. Theriogenology 13: 183–190.CrossRefGoogle ScholarPubMed
Quirke, J. F. 1978. Onset of puberty and oestrous activity in Galway, Finnish Landrace and Finn-cross ewe lambs during their first breeding season. Ir. J. agric. Res. 17: 15–23.Google Scholar
Rogers, L., Erickson, L. F., Hoversland, A. S., Metcalfe, J. and Clary, P. L. 1969. Management of a colony of African pygmy goats for biomedical research. Lab. Anim. Care 19:181.Google ScholarPubMed
Shelton, M. 1960. Influence of the presence of a male goat on the initiation of estrous cycling and ovulation of Angora does. J. Anim. Sci. 19: 368–375.CrossRefGoogle Scholar
Smith, I. D. 1967. The effect of constant long daily photoperiod upon the onset of puberty in ewes. J. agric. Sci., Camb. 69: 43–45.CrossRefGoogle Scholar
Thorburn, G. D. and Schneider, W. 1972. The progesterone concentration in the plasma of the goat during the oestrous cycle and pregnancy. J. Endocr. 52: 23–36.CrossRefGoogle Scholar
Wentzel, D., Botha, L. J. J. and Viljoen, K. S. 1979. Progesterone levels in the peripheral plasma of the cycling Angora goat doe. Agroanimalia 11: 27–28.Google Scholar
Yoshioka, Z., Awasawa, T. and Suzuki, S. 1951. Effect of short-day treatment on the modification of the breeding season in goats. Bull. natn. Inst. agric. Sci., Tokyo, Ser. G, No. 1, pp. 105–110.Google Scholar