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Review Article

How daylight affects reproduction in sheep

Pages 137-138 | Published online: 23 Feb 2011

References

  • Barrell , G.K. and Lapwood , K.R. 1979 . Seasonality of semen production and plasma luteinizing hormone, testosterone and prolactin levels in Romney. Merino and Polled Dorset rams . Anim. Reprod. Sci , 1 : 213 – 228 .
  • Berrcll , G.K. and Lapwood , K.R. 1979 . Effects of pinealectomy on the secretion of luteinizing hormone, testosterone and prolactin in rams exposed to various lighting regimes . J. Endocr. , 80 : 397 – 405 .
  • Barrell , G.K. and Lapwood , K.R. 1979 . Effects of various lighting regimens and pincalectomy on semen production m Romney rams . J. Reprod. Fert. , 57 : 273 – 279 .
  • Berrell , G.K. and Lapwood , K.R. 1979 . Effects of modifying olfactory and pineal gland function on the seasonality of semen production and plasma luteinizing hormone, testostene and prolactin levels in rams . Anim. Reprod. Sci. , 1 : 229 – 243 .
  • Bittman , E.L. , Karsch , F.J. and Hopkins , J.W. 1981 . Role of the pineal gland in ovine photoperiodism: regulation of negative feedback effect of estrediol upon LH . Biol. Reprod. , 24 ( Suppl. 1 ) : 104A. – 104A. .
  • Brown, Wendy , B. and Forbes , J.M. 1980 . Diurnal variations of plasma prolactin in growing sheep under two lighting regimes and the effect of pincalectomy . J Endocr. , 84 : 91 – 99 .
  • Demaine , C. and Kann , H.C. 1979 . “ Modification of the electrical activity of hypothalamic neurones by pineal indoles ” . In Progress in Brain Research. The pineal gland of vertebrates including man, vol. 42 , Edited by: Kappers & , J.A. and Pevet , P. 373 – 375 . Elsevier : Amsterdam .
  • Ducker , M.J. and Bowman , J.C. 1970 . Photoperiodism in the ewe. 3. The rffects of various patterns of increasing day length on the onset of anoestrus in Clun Forest ewes . Anim. Prod. , 12 : 465 – 471 .
  • Ducker , M.J. , Thwaites , C.J. and Bowman , J.C. 1970 . Photoperiodism in the ewe. 2. The effects of various patterns of decreasing daylength on the onset of oestrus in Clun Forest ewes . Anim. Prod. , 12 : 115 – 123 .
  • Eichler , V.B. and Moore , R.Y. 1971 . Pineal hydroxyindole-0.merhyltrans ferase and gonadal responses to blinding or continuous darkness blocked by pincal denervation in the male hamster . Neuroendocrinology , 8 : 81 – 85 .
  • Karsch , F.J. , Goodman , R.L. and Legan , S.J. 1980 . Feedback basis of seasonal breeding: test of an hypothesis . J. Rrprod Fert. , 58 : 521 – 535 .
  • Kelly , R.W. , Allwn , A.J. and Shaekell , G.H. 1976 . Seasonal variation m oestrous and ovariar activity of five breeds of ewes in Otaga . N.Z. J. Exp. Agric. , 4 : 209 – 214 .
  • Kennaway , D.J. , Gilmore , T.A. and Seamark , R.F. 1982 . The effect of melatonin feeding on serum prolactin and gonadotropin levels and the onset of seasonal estrouscyclicity in sheep . Endocrinology , 110 : 1766 – 1772 .
  • Kennaway , D.J. , Obst , J.H. , Dunstan , E.A. and Freisen , H.G. 1981 . Ultradian and seasonal rhythms on plasma gonadotropins, prolactn, cortisol, and testosterone in pineatec- tomized rams . Endocrinology , 108 : 693 – 646 .
  • Lincoln , G.A. 1979 . Light-induced rhythms of prolactin secretion in the ram and the effeets of cranial sympatheetomy . Acta Endocr , 91 : 412 – 427 .
  • Lincoln , G.A. 1979 . Photoperiodic control of scasonal breeding in the ram: participation of the cranial sympathetic nervous system . J. Endocr. , 82 : 135 – 147 .
  • Lincoln , G.A. , Almeida , O.F.X. , Klandorf. , H. and Cunningham , R.A. 1982 . Hourly fluctuations in the blood levels of melatonin, prolactin, lutanizing bormone, follicle- stimulating hormone, testosteronc, tri-iodothyronine, thyroxine and cortisol in rams under artificial photoperiods, and the effects of cranial sympathectomy . J. Endocr. , 92 : 237 – 250 .
  • Lincoln , G.A. & Davidson, . 1977 . The relationship between sexual and aggressive behaviour, and pituitary and testicular activity during the seasornal sex cycle of rams, and the influence of photoperiod . J. Reprod. Fert. , 49 : 267 – 276 .
  • Lincoln , G.A. and Peet , M.J. 1977 . Photoperiodic cantrol of gonadotrophin secretion in the ram: a detailed study of the temporal changes in plasma levels of follicle-ctimulating hormone. Juteinizing hormone and testosterone following an abrupt switch from long to short days . J. Endocr. , 74 : 355 – 367 .
  • Lincoln , G.A. , Peet , M.J. and Cunningham , R.A. 1977 . Seaconal and circadian changes in the episodic release of follicle-stimulating hormone. luteinuing hormone and testesterone in rams exposed to artificial photoperiods . J. Endocr. , 72 : 337 – 349 .
  • Lincoln , G.A and Short , R.V. 1980 . Seasonal breeding: Nature’s contraceptive . Reet. Progr. Horm. Res. , 36 : 1 – 52 .
  • Munro, Coralie , J. , McNatty , K.P and Renshaw , L. 1980 . Circa-annual rhythms of prolactin seeretion in ewes and the effect on pincalectomy . J. Endocr. , 84 : 83 – 89 .
  • Nett , T.M.& and Niswender , G.D. 1982 . Influencc of exogenous melatonin on seasonality of reproduction in sheep . Theriogenology , 17 : 645 – 653 .
  • Ortavant , R. and Thibault , C. 1956 . Influence de la durée d'ćlairement sur les productions spermatiques du bélier. C. R. Séane . Soc. Bio. , 150 : 358 – 361 .
  • Pelletier , J.P. 1973 . Evidence for photoneriodic control ot prolactin release in rams . J. Reprod. Fert. , 35 : 143 – 147 .
  • Pelletier , J.P. and Ortavant , R. 1975 . Photoperiodic control of LH releasem in the ram.II: Light-androgens interaction . Acta. Endocr. , 78 : 442 – 450 .
  • Rvault , J.P. and Ortavant , R. 1977 . Light control of prolactin secretion in sheep Evidence for a photo-inducible phase during a diurnal rhythm . Ann. Biol. Anim. Bioch. Biophys , 17 : 459 – 473 .
  • Roche , J.F. , Karsch , F.J. , Foster , D.L. , Takagi , S. and Dziuk , P.J. 1970 . Effect of pinealectomy on estrus. ovulation and luteinizing hormone in ewes . Biol. Reprod. , 2 : 251 – 254 .
  • Rusak , B. and Zucker , I . 1979 . Neural regulation of circadian rhythms . Physiol. Rev. , 59 : 449 – 526 .
  • Schanbacher , B.D. and Crouse , J.D. 1981 . Photoperiodic regulation of growth: a photosensitive phase during light-dark cycle . Am. J. Physiol , 241 : E1 – E5 .
  • Schanbacher , B.D. and Ford , J.J. 1979 . Photoperiodic regulation of ovine spermatogenesis: relationship to serum hormones . Biol. Reprod. , 20 : 719 – 726 .
  • Thimonier , J. 1981 . Control of seasonal reproduction in sheep and goats by light and hormones . J. Reprod. Fert. Suppl. , 30 : 33 – 45 .
  • Wurtman , R.J. , Axelrod , J. and Fiseher , J.F. 1964 . Melatonin synthesis in the pineal gland: effect of light mediated by the sympathetic nervous system . Science N. Y. , 143 : 1328 – 1330 .

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