This Article Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Services Similar articles in this journal Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via HighWire Citing Articles via Google Scholar Google Scholar Articles by Hoffmann, K. Search for Related Content PubMed Articles by Hoffmann, K.

Effects of short photoperiods on puberty, growth and moult in the Djungarian hamster (Phodopus sungorus)

Summary. Male Djungarian hamsters were raised from birth in either long (16L: 8D) or short (8L:16D) photoperiods. In 16L:8D, testes were large (about 400 mg) and showed full spermatogenesis from 31 days of age, the cauda epididymidis contained motile spermatozoa from 35 days and the accessory glands were large and reached their final size at about 60 days of age. In 8L:16D, testes remained small (about 15 mg) and undeveloped up to an age of about 130 days; they then developed to reach normal size and full spermatogenesis. In 16L:8D body weight increased steadily up to an age of about 160 days, but in 8L:16D body weight increase was slower and reached normal values, after a plateau at about 80 days, at about 190–260 days. Most animals in 8L:16D moulted into winter pelage, and then into the summer pelage; those in 16L:8D kept the summer pelage throughout.

This article has been cited by other articles:

				A. K. Beery, M. J. Paul, D. M. Routman, and I. Zucker Maternal Photoperiodic History Affects Offspring Development in Syrian Hamsters J Biol Rhythms, October 1, 2008; 23(5): 445 - 455. [Abstract] [PDF]

				M. P. Butler, M. J. Paul, K. W. Turner, J. H. Park, J. R. Driscoll, L. J. Kriegsfeld, and I. Zucker Circadian Rhythms of Photorefractory Siberian Hamsters Remain Responsive to Melatonin J Biol Rhythms, April 1, 2008; 23(2): 160 - 169. [Abstract] [PDF]

				F. Scherbarth, J. Rozman, M. Klingenspor, G. Brabant, and S. Steinlechner Wheel running affects seasonal acclimatization of physiological and morphological traits in the Djungarian hamster (Phodopus sungorus) Am J Physiol Regulatory Integrative Comp Physiol, September 1, 2007; 293(3): R1368 - R1375. [Abstract] [Full Text] [PDF]

				M. P. Butler, K. W. Turner, J. H. Park, J. P. Butler, J. J. Trumbull, S. P. Dunn, P. Villa, and I. Zucker Simulated natural day lengths synchronize seasonal rhythms of asynchronously born male Siberian hamsters Am J Physiol Regulatory Integrative Comp Physiol, July 1, 2007; 293(1): R402 - R412. [Abstract] [Full Text] [PDF]

				M. P. Butler, J. J. Trumbull, K. W. Turner, and I. Zucker Timing of puberty and synchronization of seasonal rhythms by simulated natural photoperiods in female Siberian hamsters Am J Physiol Regulatory Integrative Comp Physiol, July 1, 2007; 293(1): R413 - R420. [Abstract] [Full Text] [PDF]

				T. Watanabe, T. Yamamura, M. Watanabe, S. Yasuo, N. Nakao, A. Dawson, S. Ebihara, and T. Yoshimura Hypothalamic expression of thyroid hormone-activating and -inactivating enzyme genes in relation to photorefractoriness in birds and mammals Am J Physiol Regulatory Integrative Comp Physiol, January 1, 2007; 292(1): R568 - R572. [Abstract] [Full Text] [PDF]

				J. H. Park, A. S. Kauffman, M. J. Paul, M. P. Butler, A. K. Beery, R. M. Costantini, and I. Zucker Interval timer control of puberty in photoinhibited siberian hamsters. J Biol Rhythms, October 1, 2006; 21(5): 373 - 383. [Abstract] [PDF]

				M. E Timonin, N. J Place, E. Wanderi, and K. E Wynne-Edwards Phodopus campbelli detect reduced photoperiod during development but, unlike Phodopus sungorus, retain functional reproductive physiology. Reproduction, October 1, 2006; 132(4): 661 - 670. [Abstract] [Full Text] [PDF]

				M. J. Paul, J. H. Park, T. H. Horton, M. I. Alvarez, M. K. Burke, N. J. Place, and I. Zucker Photoperiodic Regulation of Compensatory Testicular Hypertrophy in Hamsters Biol Reprod, August 1, 2006; 75(2): 261 - 269. [Abstract] [Full Text] [PDF]

				T. R. Pak, G. R. Lynch, D. M. Ziegler, J. B. Lunden, and P.-S. Tsai Disruption of pubertal onset by exogenous testosterone and estrogen in two species of rodents Am J Physiol Endocrinol Metab, January 1, 2003; 284(1): E206 - E212. [Abstract] [Full Text] [PDF]

				K. Rousseau, Z. Atcha, F. R. A. Cagampang, P. Le Rouzic, J. A. Stirland, T. R. Ivanov, F. J. P. Ebling, M. Klingenspor, and A. S. I. Loudon Photoperiodic Regulation of Leptin Resistance in the Seasonally Breeding Siberian Hamster (Phodopus sungorus) Endocrinology, August 1, 2002; 143(8): 3083 - 3095. [Abstract] [Full Text] [PDF]

				S. Anand, S. Losee-Olson, F. W. Turek, and T. H. Horton Differential Regulation of Luteinizing Hormone and Follicle-Stimulating Hormone in Male Siberian Hamsters by Exposure to Females and Photoperiod Endocrinology, June 1, 2002; 143(6): 2178 - 2188. [Abstract] [Full Text] [PDF]

				T. R. Pak, G. R. Lynch, and P.-S. Tsai Testosterone and Estrogen Act via Different Pathways to Inhibit Puberty in the Male Siberian Hamster (Phodopus sungorus) Endocrinology, August 1, 2001; 142(8): 3309 - 3316. [Abstract] [Full Text] [PDF]

				D. J. Bernard, I. Y. Merzlyak, T. H. Horton, and F. W. Turek Differential Regulation of Pituitary Gonadotropin Subunit Messenger Ribonucleic Acid Levels in Photostimulated Siberian Hamsters Biol Reprod, January 1, 2000; 62(1): 155 - 161. [Abstract] [Full Text]

				T. Porkka-Heiskanen, N. Khoshaba, K. Scarbrough, J. H. Urban, M. H. Vitaterna, J. E. Levine, F. W. Turek, and T. H. Horton Rapid photoperiod-induced increase in detectable GnRH mRNA-containing cells in Siberian hamster Am J Physiol Regulatory Integrative Comp Physiol, December 1, 1997; 273(6): R2032 - R2039. [Abstract] [Full Text] [PDF]

				M. R. Gorman, D. A. Freeman, and I. Zucker Photoperiodism in Hamsters: Abrupt Versus Gradual Changes in Day Length Differentially Entrain Morning and Evening Circadian Oscillators J Biol Rhythms, April 1, 1997; 12(2): 122 - 135. [Abstract] [PDF]

				C. M. Finley, M. R. Gorman, C. R. Tuthill, and I. Zucker Long-Term Reproductive Effects of a Single Long Day in the Siberian Hamster (Phodopus sungorus J Biol Rhythms, March 1, 1995; 10(1): 33 - 41. [Abstract] [PDF]

				D. A. Freeman and I. Zucker Refractoriness to melatonin occurs independently at multiple brain sites in Siberian hamsters PNAS, May 22, 2001; 98(11): 6447 - 6452. [Abstract] [Full Text] [PDF]