Document Detail

Moderate seasonality in testis function of domestic cat.
MedLine Citation:
PMID:  17845610     Owner:  NLM     Status:  MEDLINE    
Adult male domestic cats are known to produce sperm throughout the year, although sexual activity is influenced by geographical location. In the northern hemisphere, feral domestic cats reproduce usually between January and July. Thus, seasonality in testicular activity might be suggested. The aim of the present study was to investigate gametogene and endocrine activity of cat testis throughout the entire year. Testes and epididymides (n = 10-12 per month) were collected after castration. Spermatogenesis was quantified by assessment of testicular sperm per testis and by flow cytometric analysis of the cells with different DNA content. Sperm from cauda epididymis were evaluated according to motility and morphological integrity. Testicular testosterone concentration was determined by enzyme immunoassay. Testis mass and sperm production varied moderately throughout the year. Significant seasonal variations were observed in the proportion of cells in the G2/M phase of cell cycle (p = 0.004) and the meiotic transformation (ratio of haploid : tetraploid cells; p = 0.021). Changes in testicular testosterone concentration were more pronounced and showed periods with high (spring) and significantly reduced testosterone levels (autumn). A marked seasonal alteration (p < 0.001) with a peak in March was assessed in the percentage of progressively motile sperm. The proportion of morphological intact sperm was also significantly higher in spring compared with winter time (p < 0.001). In conclusion, the study suggests moderate seasonal changes in quantity of sperm, more pronounced annual variation in hormone production and a distinct seasonal influence on functional sperm parameters in domestic cat.
S Blottner; K Jewgenow
Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Reproduction in domestic animals = Zuchthygiene     Volume:  42     ISSN:  0936-6768     ISO Abbreviation:  Reprod. Domest. Anim.     Publication Date:  2007 Oct 
Date Detail:
Created Date:  2007-09-11     Completed Date:  2007-12-03     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9015668     Medline TA:  Reprod Domest Anim     Country:  Germany    
Other Details:
Languages:  eng     Pagination:  536-40     Citation Subset:  IM    
Institute for Zoo and Wildlife Research, Berlin, Germany.
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MeSH Terms
Cats / physiology*
Epididymis / physiology*
Flow Cytometry / methods,  veterinary
Semen / cytology,  physiology
Sperm Count / veterinary
Sperm Motility / physiology
Spermatogenesis / physiology*
Spermatozoa / cytology
Testis / physiology*
Testosterone / metabolism
Reg. No./Substance:

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