Temperature-dependent regulation of sperm motility of Ijima's copper pheasants (Syrmaticus soemmerringii ijimae), one of 'near threatened' species

Animal Reproduction Science
Koji AshizawaY Tsuzuki


In order to conserve the copper pheasants, one of the Japanese 'near threatened' species, the knowledge of the sperm characteristics is the inevitable issue. Therefore, temperature-dependent regulation of copper pheasant sperm motility was investigated in comparison with that of domestic fowl spermatozoa. Motility of intact spermatozoa from both species was markedly affected by temperature. During incubation at 30 degrees C, copper pheasant spermatozoa showed around 60-70% motility, but became almost immotile when the temperature was raised to 40 degrees C. Then, when the temperature of the sperm suspension was subsequently cooled to 30 degrees C, the spermatozoa regained their motility. The motility of domestic fowl spermatozoa showed a similar pattern. Temperature also affected the motility of both demembranated copper pheasant and domestic fowl spermatozoa in the same way. The motility of intact copper pheasant and domestic fowl spermatozoa at 30 degrees C was unaffected following the addition of 2 mM CaCl(2), 100 nM calyculin A, an inhibitor of protein phosphatase-type 1 (PP1), or 4 mM diB-cAMP, respectively, compared with those with no effectors. However, the presence of 10 microM ML-7, a selective inhibitor of myosin ligh...Continue Reading


Jun 15, 1992·Biochemical and Biophysical Research Communications·K AshizawaY Tsuzuki
Aug 1, 1992·Journal of Reproduction and Fertility·K Ashizawa, G J Wishart
Nov 1, 1991·Journal of Reproduction and Fertility·M F Thomson, G J Wishart
Jan 1, 1990·Archives of Andrology·G C MajumderM Barua
Mar 31, 1989·Biochemical and Biophysical Research Communications·H IshiharaD Uemura
May 1, 1989·Journal of Reproduction and Fertility·K AshizawaK Okauchi
Jan 1, 1989·Annual Review of Biochemistry·P Cohen
Jan 1, 1989·Cell Motility and the Cytoskeleton·J S Tash
Jan 1, 1989·Archives of Andrology·C B Lindemann, K S Kanous
May 1, 1989·Journal of Reproduction and Fertility·K AshizawaK Okauchi
Jul 1, 1987·Journal of Reproduction and Fertility·G J Wishart, K Ashizawa
Nov 1, 1987·Journal of Cellular Biochemistry·C J Brokaw
Feb 1, 1981·Fertility and Sterility·D F Katz, J W Overstreet
Oct 1, 1993·Molecular Reproduction and Development·H Mohri
Dec 28, 1999·Animal Reproduction Science·G J Wishart, Y I Wilson

❮ Previous
Next ❯


Nov 4, 2015·Annual Review of Animal Biosciences·William V Holt, Alireza Fazeli

❮ Previous
Next ❯