| Moderate seasonality in testis function of domestic cat. | |
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MedLine Citation:
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PMID: 17845610 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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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. |
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Authors:
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S Blottner; K Jewgenow |
Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: Reproduction in domestic animals = Zuchthygiene Volume: 42 ISSN: 0936-6768 ISO Abbreviation: Reprod. Domest. Anim. Publication Date: 2007 Oct |
Date Detail:
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Created Date: 2007-09-11 Completed Date: 2007-12-03 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 9015668 Medline TA: Reprod Domest Anim Country: Germany |
Other Details:
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Languages: eng Pagination: 536-40 Citation Subset: IM |
Affiliation:
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Institute for Zoo and Wildlife Research, Berlin, Germany. blottner@izw_berlin.de |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Animals Cats / physiology* Epididymis / physiology* Flow Cytometry / methods, veterinary Male Seasons* Semen / cytology, physiology Sperm Count / veterinary Sperm Motility / physiology Spermatogenesis / physiology* Spermatozoa / cytology Testis / physiology* Testosterone / metabolism |
| Chemical | |
Reg. No./Substance:
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58-22-0/Testosterone |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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