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  • Author: S. WIERZBOWSKI x
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S. WIERZBOWSKI and E. WIERZCHOS

White, Larsen & Wales (1959) obtained semen from the epididymis of the ram by establishing a fistula into the vas deferens. This method enabled the authors to make observations on epididymal semen without contamination by other accessory gland secretions and allowed them to carry out comparative studies on normally ejaculated spermatozoa. The technique was subsequently improved by Ewy & Bielański (1962). Bennett & Rowson (1963) developed a technique for cannulating the vas deferens in the bull, which was modified by Amann, Hokanson & Almquist (1963) and used in further studies on the output of spermatozoa in the ram by Bielański & Ewy (1966), Tischner (1966, 1967) and Zełtobriuch, Łoginowa & Manuiłow (1966). This communication describes a technique for cannulation of the vas deferens in the boar. Three Landrace boars were used. Their ages
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Z. EWY, T. KOŁCZAK, S. WIERZBOWSKI and E. WIERZCHOś

Klumbies & Kleinsorge (1950) and Fox & Fox (1969) recorded blood pressure, heart rate and respiratory changes during ejaculation elicited by masturbation and natural coitus. Jakubowski (1966) reported that a rise in the heart rate occurred and Wierzchoś (1970) observed a rise in blood pressure, heart rate and respiratory rate during copulation in the boar. According to Wójcik (1969), the blood in copulating rams contains substances which induce incomplete contractions of the isolated vas deferens. Gudat & Schnell (1970) found that the levels of erythrocytes, leucocytes, haemoglobin, plasma glucose and transaminases, GOT and GPT, were higher in boars immediately after copulation than before it. Changes in the blood constituents of the male during copulation do not, however, appear to have been described until now. Since copulation in the