Induction of oestrus and ovulation in anoestrous fallow deer (Dama dama) by using progesterone and GnRH treatment

Asher, G. W.; Macmillan, K.L.

doi:10.1530/jrf.0.0780693

Cited by 12 publications

(5 citation statements)

References 6 publications

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“…This is in agreement with other reports utilizing progesterone and PMSG or GnRH to induce early calving in the red hind (Adam et al, 1985;Fisher et al, 1986;Moore and Cowie, 1986) and the fallow doe (Asher and Macmillan, 1986;Asher and Smith, 1987). This is in agreement with other reports utilizing progesterone and PMSG or GnRH to induce early calving in the red hind (Adam et al, 1985;Fisher et al, 1986;Moore and Cowie, 1986) and the fallow doe (Asher and Macmillan, 1986;Asher and Smith, 1987).…”

supporting

confidence: 91%

A note on the induction of ovulation in lactating red deer hinds prior to the breeding season

Fisher¹,

Fennessy²,

Davis³

1989

Anim. Sci.

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Methods of inducing ovulation 3 weeks prior to the onset of the breeding season were evaluated in lactating adult red deer. Following 11 days of intravaginal progesterone pre treatment, hinds were either untreated (control), or given 300 i.u. PMSG i.m. or 500 mglh GnRH s.c. by osmotic pump. All hinds were laparoscoped 7 days after progesterone withdrawal to record the presence or absence of a corpus luteum on the ovaries, Laparoscopy showed 0113 control, 11113 PMSG and 8/13 GnRH-treated hinds ovulated indicating that during lactation, both methods of inducing ovulation are similarly effective, However, although these treatments induced ovulation, fertility as assessed from calving records, was poor.

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supporting

confidence: 91%

A note on the induction of ovulation in lactating red deer hinds prior to the breeding season

Fisher¹,

Fennessy²,

Davis³

1989

Anim. Sci.

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“…hard antler. Indeed, Asher & Macmillan (1986) reported early conception on 23 February on the Ruakura Station, New Zealand, and it is well known that fallow deer actually mate as late as February or March (Chapman & Chapman, 1975;Fischer, , 1984.…”

Section: Discussionmentioning

confidence: 99%

Seasonal changes of testis volume and sperm quality in adult fallow deer (Dama dama) and their relationship to the antler cycle

Gosch¹,

Fischer²

1989

Reproduction

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Four adult male fallow deer were investigated for 1-4 consecutive years to study the relationships between annual changes in testis volume, sperm quality and antler status. Testicular volume started to increase in July/August, peaked just before the rut, declined until December to 50% of maximum, persisted at this level up to February/March and reached minimal volume after antler casting in late April. There was no apparent age effect on the seasonality of testis size fluctuations. Velvet shedding and antler casting occurred at about 80% and 25%, respectively, of maximal testis volume. Spermatozoa had the same general appearance as those of related ruminants. Viable spermatozoa appeared between August and early May which corresponds almost exactly to the time when fallow deer are in hard antler. From September to March sperm quality would fulfil artificial insemination standards for cattle semen. In June and the first half of July 14 out of 15 ejaculates were devoid of any sperm cells. There were no indications of a secondary seasonal peak in values monitored.

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“…As oestradiol is believed to regulate oestrous behaviour by acting on the hypothalamus (Clegg et al, 1958;Radford, 1967), the seasonal variation in the expression of oestrus may be due to a variation in the action of oestradiol on the hypothalamic-pituitary axis. In this study, the melatonin-treated deer were responsive in late February, some 8 weeks before the onset of the natural rut (the first natural mating in 1990 was recorded on 21 April); and contrary to other methods of advancing the onset of oestrus or ovulation in intact deer (pregnant mares' serum gonadotrophin: Adam et al, 1985;Asher & Smith, 1987; gonadotrophin-releasing hormone (GnRH): Asher & Macmillan, 1986) melatonin treatment has been shown to induce recurring reproductive activity in the nonbreeding season (Adam & Atkinson, 1984;Adam et al, 1986;Asher et al, 1988b McLeod et ai, 1991).…”

Section: Discussionmentioning

confidence: 77%

Effect of progesterone and oestradiol benzoate on oestrous behaviour and secretion of luteinizing hormone in ovariectomized fallow deer (Dama dama)

Jabbour¹,

Asher²,

Smith³

et al. 1992

Reproduction

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Summary. Eighteen ovariectomized fallow deer does and two adult bucks were used to investigate the effect of exogenous progesterone and oestradiol benzoate on oestrous behaviour and secretion of luteinizing hormone (LH). In Expts 1 and 2, conducted during the breeding season (April\p=n-\September), does were treated with intravaginal Controlled Internal Drug Release (CIDR) devices (0\m=.\3g progesterone per device) for 12 days and differing doses of oestradiol benzoate administered 24 h after removal of the CIDR device. The dose had a significant effect on the proportion of does that exhibited oestrus within the breeding season (P < 0\m=.\001), the incidence of oestrus being 100% with 1\m=.\0,0\m=.\1 and 0\m=.\05 mg, 42% for 0\m=.\01 mg and 0% for 0\m=.\002 mg oestradiol benzoate. There was a significant log\p=n-\linear effect of dose on the log duration of oestrus, which was 6\p=n-\20,2\p=n-\14,2\p=n-\12 and 2h after treatment with 1, 0\m=.\1,0\m=.\05 and 0\m=.\01 mg of oestradiol benzoate, respectively. Dose had a significant effect on the peak plasma LH concentration (P < 0\m=.\01), mean (\m=+-\s.e.m.)surge peaks of 27\m=.\7\ m=+-\ 2\m=.\3, 25\m=.\9\m=+-\1\m=.\8and 18\m=.\6\m=+-\3\m=.\4 ng/ml being observed following treatment with 1, 0\ m=. \ 1and 0\m=.\01 mg oestradiol benzoate respectively. In Expt 3, also conducted during the breeding season, progesterone treatment (0 vs. 6\p=n-\12 days) before the administration of 0\m=.\05mg oestradiol benzoate had a significant effect on the incidence of oestrus (0/6 vs. 10/12, P < 0\m=.\05), but not on LH secretion. The duration of progesterone treatment (6 vs. 12 days) had no effect on oestrus. In Expt 4, conducted in the nonbreeding season (October\p=n-\March), control does were largely unresponsive to treatment with 0\m=.\1 mg oestradiol benzoate. This was manifest in a lower proportion of does exhibiting oestrous behaviour and LH surges. Melatonin treatment, with implants administered on four occasions at intervals of 28\p=n-\30 days starting from 24 October, significantly increased the proportion of does that exhibited oestrus in February, during the later phase of the nonbreeding season (7/8 vs. 1/8, P < 0\m=.\05). Melatonin-treated does also exhibited significantly higher basal plasma LH concentrations after removal of CIDR devices in February (5\m=.\8\ m=+-\0\m=.\5vs. 2\m=.\1\m=+-\0\m=.\4 ng/ml, P < 0\m=.\01). While only one control doe had an LH surge, with a peak of 13\m=.\8 ng/ml, all melatonin-treated does exhibited LH surges, with a mean peak concentration of 58\m=.\0 \ m=+-\ 8\m=.\4 ng/ml.

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Induction of oestrus and ovulation in anoestrous fallow deer (Dama dama) by using progesterone and GnRH treatment

Abstract: Summary. Fourteen

Cited by 12 publications

References 6 publications

A note on the induction of ovulation in lactating red deer hinds prior to the breeding season

A note on the induction of ovulation in lactating red deer hinds prior to the breeding season

Seasonal changes of testis volume and sperm quality in adult fallow deer (Dama dama) and their relationship to the antler cycle

Effect of progesterone and oestradiol benzoate on oestrous behaviour and secretion of luteinizing hormone in ovariectomized fallow deer (Dama dama)

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