The study that I read, which was quoted in a canine reproduction book, stated that 4 hours after a collection, the dog had 80% of his motile sperm in full force. This makes me think back to other things that I've read that encourage you to collect on the dog a day before a planned breeding to clean out the system so to speak. If you collect on your dogs and examine them on a sytematic basis, you will certainly notice that a collection taken a couple of weeks apart, will have more debris, more bent tails, more with the caps separated etc. Do your sources have an information about what the viable shelf life of a sperm is while still residing in the dog? I know that they are constantly being manufactured, but how long do they live? Myra Savant
>From: Leanne Bertani <[EMAIL PROTECTED]> >Reply-To: The Cavalier King Charles Spaniel List ><[EMAIL PROTECTED]> >To: [EMAIL PROTECTED] >Subject: [CKCS-L] influence of short interval ejaculate >Date: Sun, 10 Feb 2002 16:33:16 -0500 > >A second ejaculation an hour later contains 70% of the amount of sperm of >the first ejaculate. >L > > > >Theriogenology 1999 Oct 15;52(6):981-6 >Semen quality in dogs and the influence of a short-interval second >ejaculation. > >England GC. > >Department of Farm Animal and Equine Medicine and Surgery, Royal Veterinary >College, University of London, Hatfield, Herts, England. > >Semen quality was examined in each of 65 known fertile dogs. Values were >found to be similar to those previously published, although an apparent >breed influence was demonstrated, with German shepherd dogs producing >ejaculates of larger volume and greater total spermatozoal output than >other >breeds. A second ejaculate was collected from each dog with a mean interval >of 63 min. The second samples had significantly lower values for the volume >of the second fraction, the spermatozoal concentration and the total >spermatozoal output. There were no differences for the percentage motility >or the percentage of morphologically normal live spermatozoa. While there >was no increase in semen quality of the second ejaculate, the technique may >be useful since it results in the collection of approximately 70% more >spermatozoa than a single ejaculate. These spermatozoa also had normal >motility and morphology and could, therefore, be used for insemination or >cryopreservation. > >========================================================= >"Magic Commands": >to stop receiving mail for awhile, click here and send the email: >mailto:[EMAIL PROTECTED]?body=SET%20CKCS-L%20NOMAIL >to start it up gain click here: >mailto:[EMAIL PROTECTED]?body=SET%20CKCS-L%20MAIL > > E-mail [EMAIL PROTECTED] for assistance. >Search the Archives... http://apple.ease.lsoft.com/archives/ckcs-l.html > >All e-mail sent through CKCS-L is Copyright 2002 by its original author. Myra Savant Gardengate Cavaliers _________________________________________________________________ Send and receive Hotmail on your mobile device: http://mobile.msn.com ========================================================= "Magic Commands": to stop receiving mail for awhile, click here and send the email: mailto:[EMAIL PROTECTED]?body=SET%20CKCS-L%20NOMAIL to start it up gain click here: mailto:[EMAIL PROTECTED]?body=SET%20CKCS-L%20MAIL E-mail [EMAIL PROTECTED] for assistance. Search the Archives... http://apple.ease.lsoft.com/archives/ckcs-l.html All e-mail sent through CKCS-L is Copyright 2002 by its original author.
