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

Gosch, B.; Fischer, Konrad

doi:10.1530/jrf.0.0850007

Cited by 49 publications

(27 citation statements)

References 8 publications

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“…These results are comparable to the results obtained in this study for roe deer. Increases in the number of morphologically abnormal spermatozoa during the pre-rut and post-rut periods have also been observed in other cervids, such as fallow deer (Dama dama) (Gosch and Fischer 1989), wapiti (Cervus elaphus) (Haigh et al 1984), Eld's deer (Cervus eldi thamin) (Monfort et al 1993) and spotted deer (Axis axis) (Umapathy et al 2007).…”

Section: Discussionmentioning

confidence: 73%

Morphological defects of epididymal spermatozoa in male roe deer (Capreolus capreolus) during the reproductive season

Kozioł¹,

Koziorowski²

2015

Polish Journal of Veterinary Sciences

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The aim of this study was to analyse the morphology of the epididymal spermatozoa of male roe deer obtained postmortem at the beginning (May), peak (July/August) and the end (September) of the reproductive season. Spermatozoal abnormalities were divided into major (associated with impaired fertility) and minor (not associated with impaired fertility) defects. The highest percentage of abnormal spermatozoa was observed in May (17.78 ± 1.88%), with a much higher proportion of major (12.35 ± 1.11%) than minor defects (5.43 ± 1.59%) being observed. The percentage of abnormal spermatozoa was lowest during the peak of the reproductive season (4.97 ± 1.13%), with the proportion of major (2.68 ± 0.78%) and minor defects (2.28 ± 0.45%) being comparable during this period. The percentage of abnormal spermatozoa increased again in September (11.05 ± 1.60%), with the major defects (6.15 ± 1.04%) slightly surpassing the minor defects (4.90 ± 0.77%); however, total abnormalities still remained lower than those found in May. These differences were statistically significant, with the exception of the difference in minor defects between the pre-rut and post-rut periods. These results indicate that the best period to collect epididymal spermatozoa from roe deer postmortem is the peak of the reproductive season (July/August); however, they can also be recovered at the end of the reproductive season (September), as the percentage of major defects is relatively low at this time. This study provides the basis for further research to determine optimal methods for the storage and cryopreservation of epididymal spermatozoa in this species.

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Section: Discussionmentioning

confidence: 73%

Morphological defects of epididymal spermatozoa in male roe deer (Capreolus capreolus) during the reproductive season

Kozioł¹,

Koziorowski²

2015

Polish Journal of Veterinary Sciences

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“…In contrast, cervids maintained in high latitudes display alternating periods of sperm production and complete spermatogenic arrest (Haigh et al. 1984; Gosch and Fischer 1989), and thus the bucks become infertile during the period of sexual inactivity. In cervids, living in the Mediterranean Basin, this cyclic sequence of sperm production and spermatogenic arrest becomes less apparent, as it is possible to collect spermatozoa during the non‐breeding season, though with very low quality of sperm parameters (Martinez‐Pastor et al.…”

Section: Testicular Activitymentioning

confidence: 99%

Seasonal Endocrine Changes and Breeding Activity in Mediterranean Wild Ruminants

Santiago-Moreno

Gómez-Brunet

Toledano-Dı́az

et al. 2006

Reprod Domestic Animals

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The methods of assisted reproduction commonly used in domestic animals are currently being applied to non-domestic species. This is because of the limitation of maintaining the genetic variability in the wild, as it occurs in wild ruminants of the Mediterranean Basin. Despite the apparent progress of the technology, success of the offspring to grow and become healthy adult individuals has remained low in wild species. Difficulties usually arise from insufficient information about basic reproductive biology, such as the seasonal changes in ovarian and testicular activity. Directional adaptive evolution involves development of speciespecific physiological reproductive patterns to cope with various environmental factors. Thus, species originating and living at the same latitude display different reproductive strategies to entrain the breeding activity at an optimal time of the year. The aim of this paper was to present current knowledge on reproductive physiology of Mediterranean wild ruminants as a basic prerequisite for the successful use of assisted reproduction methods. Special emphasis is given to seasonal endocrine changes, ovarian cycles and testicular activity of Iberian wild ruminants, together with the role of social interactions on the regulation of these events.

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“…For example, annual changes in hormone levels (McMillin et al 1974, Mirarchi et al 1977b, 1978, Bubenik et al 1983, spermatozoan numbers (Lambiase et al 1972, Mirarchi et al 1977a, and weights of testes and epididymes (Mirarchi et al 1977a, Miller 1989) of this species have been described previously. Annual changes in reproductive characteristics have also been described for fallow deer Dama dama (Gosch andFischer 1989, Asher et al 1996) and roe deer Capreolus capreolus (Blottner et al 1996).…”

Section: Introductionmentioning

confidence: 88%

Spermatozoan numbers and characteristics of associated organs in male white-tailed deer during the breeding season

2003

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2003. Spermatozoan numbers and characteristics of associated organs in male white-tailed deer during the breeding season. Acta Theriologica 48: 123-130.Short-term changes in testicular spermatozoa, testes weight, testes length, epididymes weight, epididymal spermatozoa, and body weight of adult and yearling male white-tailed deer Odocoileus virginianus (Zimmermann, 1780) were examined over a 9-week period that included the peak of the breeding season in South Carolina. Mean values for all characteristics were significantly greater in adults compared to yearlings. Values for reproductive characteristics tended to be highest during the last week in October or the first week in November and decreased over the course of the investigation. Body weight of adults decreased from late October through early December, whereas body weight of yearlings fluctuated only slightly throughout the 9-week period. Significant correlations were observed among all reproductive characteristics and body weight was highly correlated with all characteristics except testicular spermatozoa. Values for reproductive characteristics differed significantly between the right and left sides of the reproductive tracts. Results demonstrate the occurrence of short-term changes in reproductive capabilities of white-tailed deer that are relevant for the development of management strategies for this species.

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

Cited by 49 publications

References 8 publications

Morphological defects of epididymal spermatozoa in male roe deer (Capreolus capreolus) during the reproductive season

Morphological defects of epididymal spermatozoa in male roe deer (Capreolus capreolus) during the reproductive season

Seasonal Endocrine Changes and Breeding Activity in Mediterranean Wild Ruminants

Spermatozoan numbers and characteristics of associated organs in male white-tailed deer during the breeding season

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