Seasonal levels of LH, FSH, testosterone and prolactin in adult male pudu (Pudu puda)

Bubenik, George A.; Reyes, Eugenia; Schams, D.; Lobos, Alejandro; Bartoš, Luděk

doi:10.1016/s0305-0491(96)00163-0

Cited by 18 publications

(11 citation statements)

References 17 publications

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“…The non-significant differences between physiological components in relation to primary productivity found in our study suggest that primary productivity across all habitats was high enough to allow roe deer populations to perform their reproductive tasks-births and lactation, adult male defense of territories (Mateos-Quesada, 2011) and juvenile male start of dispersal (Bubenik et al, 1996). Reproduction is a key process in maintaining populations and permitting their expansion.…”

Section: Primary Productivity In Summer But Not In Spring Is Related mentioning

confidence: 61%

“…E 2 has been found to increase at the end of pregnancy-parturition in several cervids and is presumably related to the development of the milk gland (Ryg, 1986 and references therein). Testosterone (T) is related to male territoriality, rut and sexual expression of secondary traits in several cervids (Bubenik et al, 1991(Bubenik et al, , 1996Gómez et al, 2006), and T plays an important role in roe deer in the rut period, antler growth (Roelants et al, 2002;Sempere and Lacroix, 1982;Sempere et al, 1992) and juvenile dispersal (Pinheiro et al, 2012).…”

Section: Reproductive Hormones Evaluatedmentioning

confidence: 99%

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Testing Cort-Fitness and Cort-Adaptation hypotheses in a habitat suitability gradient for roe deer

Escribano-Ávila¹,

Pettorelli²,

Virgós³

et al. 2013

Acta Oecologica

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Section: Primary Productivity In Summer But Not In Spring Is Related mentioning

confidence: 61%

Section: Reproductive Hormones Evaluatedmentioning

confidence: 99%

Testing Cort-Fitness and Cort-Adaptation hypotheses in a habitat suitability gradient for roe deer

Escribano-Ávila¹,

Pettorelli²,

Virgós³

et al. 2013

Acta Oecologica

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“…The seasonal parameters of reproductive hormones in southern pudu indicates a bi-seasonal activation of the reproductive axis (Reyes-Toledo et al 1993, Bubenik et al 1996 with equal peak levels of LH and T observed in the spring and the fall. In addition, an extended period of high concentration of FSH was also detected (see Fig.…”

Section: Discussionmentioning

confidence: 99%

“…Whereas axis deer exhibit no interindividual seasonal synchronization of the antler or the reproductive cycle (Loudon and Curlewis 1988), in muntjacs only the antler cycle is seasonally synchronized but not the reproduction (Chapman and Harris 1991). In pudu, both the antler cycle and the reproductive pattern are more or less synchronized (Reyes et al 1988, Bubenik et al 1996.…”

Section: Antler Growthmentioning

confidence: 99%

“…Most recently, our group determined the rate of development of reproductive organs and circannual variation of luteinizing hormone (LH), follicle stimulating hormone (FSH), testosterone (T), and prolactin (PRL) in plasma of male southern pudu Pudu puda Molina, 1782, a small subtropical deer living in Chile (Reyes et al 1988, Reyes-Toledo et al 1993, Bubenik et al 1996.…”

Section: Introductionmentioning

confidence: 99%

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Seasonal changes of testicular parameters in southern pudu Pudu puda in relationship to circannual variation of its reproductive hormones

Reyes¹,

Bubenik²,

Schams³

et al. 1997

Acta Theriol.

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Morphological and Morphometric Changes of Pituitary Lactotrophs of Viscacha (Lagostomus maximus maximus) in Relation to Reproductive Cycle, Age, and Sex

Filippa

Mohamed

2009

The Anatomical Record

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Lactotrophs in pituitary pars distalis (PD) of viscacha were studied by immunohistochemistry and morphometric analysis in the following groups: 1) adult males throughout the reproductive cycle (reproductive, gonadal regression, and recovery periods), 2) melatonin-treated adults, 3) castrated adults, 4) prepubertal, 5) non-pregnant females, and 6) pregnant females (early, mid, and late pregnancy). Immunopositive percentage area (%IA), cell percentage in PD (% PDC), number of cells per reference area (no.cell/ RA), major cellular and nuclear diameters were analyzed. Lactotrophs were mainly localized in the ventro-medial region and the caudal extreme of PD. In the male viscachas, they were isolated in small and big groups, close to blood vessels and near follicles. These cells were pleomorphic and with a heterogeneous cytoplasmic immunolabeling pattern. In the adult males of the gonadal regression period the morphometric parameters were the lowest. Most parameters of lactotrophs in the prepubertal were significantly lower than in the adult males in the reproductive period. In the melatonintreated animals and in castrated animals there was a decrease in %IA, %PDC, and no.cell/RA. In the females, the morphometric parameters increased at the end of pregnancy. Non-pregnant females exhibited a higher immunopositive area and number, but a smaller size of cells than males. Our results showed that in the adult male viscacha, lactotrophs vary seasonally, probably due to the photoperiod effect through melatonin. Besides the changes observed after castration, in prepubertal animals, in adults of different sex, and during pregnancy suggest that the gonadal steroid hormones might modify the lactotrophs activity. Anat Rec, 293:150-161, 2010. V V C 2010 Wiley-Liss, Inc.

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Seasonal levels of LH, FSH, testosterone and prolactin in adult male pudu (Pudu puda)

Cited by 18 publications

References 17 publications

Testing Cort-Fitness and Cort-Adaptation hypotheses in a habitat suitability gradient for roe deer

Testing Cort-Fitness and Cort-Adaptation hypotheses in a habitat suitability gradient for roe deer

Seasonal changes of testicular parameters in southern pudu Pudu puda in relationship to circannual variation of its reproductive hormones

Morphological and Morphometric Changes of Pituitary Lactotrophs of Viscacha (Lagostomus maximus maximus) in Relation to Reproductive Cycle, Age, and Sex

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