Correlative studies on the body weight, testis weight and plasma testosterone of Pteropus giganteus giganteus (Brunnich)
Keywords:
Testis, plasma, testosterone, spermatogenesis, hormoneAbstract
In the present study correlation between the body and testis weight with that of mean plasma testosterone concentration was investigated from the pteropid bat, Pteropus giganteus giganteus. The cyclic variations in the body and testis weight were found to in consonance with the hormonal fluctuations. The total body and testis weight beginning to rise in July-August which is after 1-2 months after food availability (mango fruiting) in the local study area of this bat. And then, further reach to its peak level during Oct-Nov. which may be correlated with higher mean plasma concentration. Early rise in the body and testis weight which is complemented by the increase in plasma testosterone concentration may be due to initiation of spermatogenesis. Availability of food may act as stimulus for the onset of spermatogenesis.
Downloads
References
Bernard RTF (1986) Seasonal changes in plasma testosterone concentrations and Leydig cell and accessory gland activity in the Cape horseshoe bat (Rhinolophus capensis). J.Reprod.Fert., 78: 413-422.
Bernard RTF and Cumming GS (1997) African bats: Evolution of reproductive patterns and delays. The Quarterly Review of Biology, 72, 253–274. Beguelini MR, Moreira PR, Faria KC, Marchesin SR, Morielle-Versute E (2009) Morphological characterization of the testicular cells and seminiferous epithelium cycle in six species of Neotropical bats, J Morphol., 270(8):943-53.
Bhasin S, Storer TW, Berman N, Yarasheski KE, Clevenger B, Phillips J, Lee WP, Bunnell TJ and Casaburi R (1997) Testosterone Replacement increases fat-free mass and muscle size in hypogonadal men. J. Clin. Endocrinol. Metab., 82(2): 407-413.
Blottner S, Hingst O and Meyer HD (1996) Seasonal spermatogenesis and testosterone production in soe deer (Capreolus capreolus). J. Reprod. Fertil. 108: 299-305.
Choudhury S and Sastry MS (2011) Correlative studies on circulatory serum testosterone and reproductive pattern in the male Indian leaf nosed bat, Hipposideros speoris (Schneider), The Ecoscan : special issue Vol. 1; 81-85.
Gopalkrishna AN Badwaik N (1993) Male reproductive cycle of in some Indian Bats. J. Bom. Nat. His. Soc., 92 : 174.1814.
Gustafson AW Damassa DA (1985) Annual variations in plasma sex steroid-binding protein and testosterone concentrations in the adult male little brown bat: Relation to the asynchronous recrudescence of the testis and accessory reproductive organs. Biology of Reproduction, 33 (5): 1126-1137.
Gustafson AW (1987) Changes in Leydig cell activity during the annual testicular cycle of the bat Myotis lucifugus lucifugus: histology and lipid histochemistry. Am .J. Anat., 178;312-325.
Krutzsch PH And Crichton EG (1990) Reproductive biology of bent- winged bat, Minopterous schreibersii (Vespertilionidae) in southeast south Austrelia. Acta Anatomica, 139, 109-125.
McGuckin MA Blackshaw AW (1987) Seasonal changes in spermatogenesis (including germ cell degeneration) and plasma testosterone concentration in the grey headed fruit bat, Pteropus poliocephalus. Aust.J.Biol.Sci., 40:211-220.
McGuckin MA and Blackshaw AW (1991) Seasonal changes in testicular size, plasma testosterone concentrations and body weight in captiveflying foxes, Pteropus poliocephalus and P. scapulatus. J. reprod. Fert. 92 : 339-346.
Sauerwein H and Meyer HHD (1989) Androgen and estrogen receptors in bovine skeletal muscle - relation to steroid induced allometric muscle growth. J. Anim. Sci., 67: 206 - 212.
Sauerwein H, Dursch I and Meyer HHD (1991) Quantification of glucocorticoid receptors in bovine skeletal muscles; topographical distribution, sex effect and breed comparisons. J. Steroid Biochem. 39: 941-945.
Sastry MS and Masram A (2007) Correlative changes in the body weight, testis size and serum testosterone concentrations in the Indian flying fox, Rousettus leschenaultia (Desmerest): Flora and Fauna, 13(1) : 101-114.
Singh UP (1997) Reproductive biology of the male sheath-tailed bat, Taphozous longimanus (Emballonuridae) from India. Biomedical and Environmental Sciences, 10 (1): 14-26.
Singh UP Krishna A (2000) Seasonal changes in circulating testosterone and androstenedione concentration and their correlation with the anamolous reproductive pattern in the male Indian sheath tailed bat, Taphozous longimanus. J. Exp. Zoo., 287: 54-61.
Turner CD Bagnara, JT (1976) Endocrinology of testis. In:General Endocrinology. Eds. C. D. Turner and J.T. Bagnara VI. Edition W.B. Saunders Company. p. 427.
Vivier LM, Vander Merve (1996) Reproductive pattern in the male Angolan free tailed bat, Tadarida (Mops) Condylura (Microchiropterra : Molossidae ) in the Eastern Transvaal, South Africa. J. Zool. Lond., 239:465-476.
Downloads
Published
How to Cite
Issue
Section
License
Copyright (c) 2015 Authors
This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.
Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license unless indicated otherwise in a credit line to the material. If the material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/ licenses/by/4.0/
