Seasonal pattern of LH and testosterone secretion in adult male fallow deer, Dama dama

Asher, G. W.; Peterson, A. J.; Bass, J. J.

doi:10.1530/jrf.0.0850657

Cited by 41 publications

(31 citation statements)

References 19 publications

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“…In the male deer that we used (kept at 4 4°N latitude), serum LH concentra tions increased from spring (March or April), peaked during early summer (June or July), and decreased th ereaft er . Ann ual c hang es in p las ma L H concentrations in temperate cervids (short-day breeders) have been observed in red [10], fallow [11] and white-tailed deer [12,13]. The results of the present study closely agree with the findings of those reports.…”

Section: Discussionsupporting

confidence: 92%

“…This phenomenon may be partly caused by pulsatile secretion of LH [10][11][12] or the age of stag [14]. However, the annual changes of LH based on the monthly sampling in our data are quite clear.…”

Section: Discussionmentioning

confidence: 58%

“…However, the annual changes of LH based on the monthly sampling in our data are quite clear. It is well known that the annual changes of LH secretion in temperate cervids are characterized by fluctuations in mean plasma concentrations and in pulse frequency, duration and amplitude [10][11][12]. Asher et al [11] reported that the major annual change in LH secretion by male fallow deer was seen in the basal concentration.…”

Section: Discussionmentioning

confidence: 99%

“…It is well known that the annual changes of LH secretion in temperate cervids are characterized by fluctuations in mean plasma concentrations and in pulse frequency, duration and amplitude [10][11][12]. Asher et al [11] reported that the major annual change in LH secretion by male fallow deer was seen in the basal concentration. They also found in the same study that the circadian rhythm of T secretion is related to LH secretion with a time-lag of 2 months [11].…”

Section: Discussionmentioning

confidence: 99%

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Annual Changes in Serum LH and Testosterone Concentrations in Male Sika Deer (Cervus nippon).

Kameyama

Miyamoto

Kobayashi

et al. 2002

Journal of Reproduction and Development

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Abstract. Although sika deer is valuable for deer farming in Japan, little is understood about the reproductive endocrinology of the male. Especially, there is no information on the blood LH concentration in male sika deer. The present study aimed to determine the annual changes of serum LH and testosterone (T) secretion in male sika deer. Blood samples were collected monthly from three stags for 3 years (1998)(1999)(2000). Serum LH and T concentrations were determined using a secondantibody enzyme immunoassay and a time-resolved fluorescent immunoassay, respectively. The serum LH and T concentrations fluctuated obviously in an annual fashion. The LH concentrations peaked in May, June and July, while the T concentrations peaked in September and October. These results suggest that LH and T secretion in adult male sika deer are mainly controlled by annual rhythm in the same manner as in other temperate cervids. Key words: Sika deer, Stag, LH, Testosterone (J. Reprod. Dev. 48: [613][614][615][616][617] 2002) eer farming is popular in China, New Zealand, A us t r a l ia a nd K o r ea . Var i o us s pec ie s , including red deer (Cervus elaphus), sika deer (C. nippon), rusa deer (C. timorensis) and fallow deer (Dama dama), are farmed to produce venison and/ or antler velvet [1]. In Japan, deer farming has not been as popular. We believe that farming native sika deer would be useful for protecting against genetic contamination of these deer with other species, for providing a constant supply of venison, and for buffering the wild sika deer population that has been reduced by hunting as it has in Europe [2].Successful deer farming requires appropriate management systems based on physiological information. However, such a system for sika deer has not been established yet. Sika deer are seasonal breeders that mate in the fall [3] and it is essential f o r e f f e c t i v e f a r m i n g t o u n d e r s t a n d t h e reproductive endocrinology of this species. Little is known about the reproductive endocrinology of sika deer except for the steroid hormones such as testosterone (T) in males [4][5][6] and progesterone in females [5,7]. Yamaji et al. [8] described seasonal changes in the gonadotropic cells in the pituitary of wild sika deer. However, there is no published information of blood LH concentrations in sika deer. Therefore, this study aimed to determine the annual changes of serum LH and T concentrations in male sika deer.

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Section: Discussionsupporting

confidence: 92%

Section: Discussionmentioning

confidence: 58%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

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Annual Changes in Serum LH and Testosterone Concentrations in Male Sika Deer (Cervus nippon).

Kameyama

Miyamoto

Kobayashi

et al. 2002

Journal of Reproduction and Development

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“…A seasonal cycle in body weight, neck and chest girths was also observed in Eld's deer that was qualitatively similar to that observed in red deer (Suttie et al, 1984), chital (Loudon and Curlewis, 1988) and fallow deer (Asher et al, 1989 (Lincoln and Guinness, 1973) and Soay rams (Lincoln and Davidson, 1977). Aggressive behaviours in ungulates generally coincide with changes in sexual libido and mating behaviour in ungulates (Fraser, 1968 (Lincoln, 1971), fallow deer (Chaplin and White, 1972), black-tailed deer (West and Nordan, 1976), white-tailed deer (Wislocki, 1943), reindeer (Meschaks and Nordkvist, 1962) and chital (Loudon and Curlewis, 1988 Lincoln, 1981).…”

Section: Introductionsupporting

confidence: 73%

Circannual inter-relationships among reproductive hormones, gross morphometry, behaviour, ejaculate characteristics and testicular histology in Eld's deer stags (Cervus eldi thamin)

Monfort¹,

Brown²,

Bush³

et al. 1993

Reproduction

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Effects of an antiandrogen treatment on morphological characters and physiological functions of male fallow deer (Dama dama L.)

1993

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From mid-April to late November, i.e., during antler growth phase and main breeding season, a group of four (later three) male fallow deer was treated with increasing doses of the antiandrogen cyproterone acetate (CA). Throughout the treatment period, plasma testosterone levels of the bucks were either undetectable or only slightly above the detection limit of 0.1 ng/ml. In marked contrast to controls, testicular volumes and neck girths of the CA treated bucks were basal during the application period, proving the strong antigonadotropic effect of CA (testicular volume) and the absence of androgen action at the normal target organs (neck girths), respectively. Antler growth in the CA treated bucks occurred during the normal time span for fallow deer and the antlers produced were of species specific shape. From this it is concluded that in fallow deer, onset, duration, and termination of antler growth are independent of androgen action. Velvet shedding in the CA treated bucks however did not occur at the normal time (late August/early September), but was postponed until late December/early January, i.e., about 5 weeks after the termination of CA application. Activity of alkaline phosphatase in the experimental animals increased during the antler growth phase, but was markedly lower than in controls. Maximum body weight in the CA treated bucks was reached already in June, i.e., about 3 months prior to controls. Furthermore, the rut associated, drastic decline in body weight observed in controls did not occur in the experimental animals.

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Seasonal pattern of LH and testosterone secretion in adult male fallow deer, Dama dama

Cited by 41 publications

References 19 publications

Annual Changes in Serum LH and Testosterone Concentrations in Male Sika Deer (Cervus nippon).

Annual Changes in Serum LH and Testosterone Concentrations in Male Sika Deer (Cervus nippon).

Circannual inter-relationships among reproductive hormones, gross morphometry, behaviour, ejaculate characteristics and testicular histology in Eld's deer stags (Cervus eldi thamin)

Effects of an antiandrogen treatment on morphological characters and physiological functions of male fallow deer (Dama dama L.)

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