Studies on the physiology of reproducton in the male fowl : III. On the addition of transparent fluid to the cock\u27s semen

1) It is found in the present experir ents that a considerable amount of transparent fluid flowed presumably out of the phallus or lymph-fold or both is added to the dense semen in vas deferens, at the moment when it is ejected; and so the ejaculated semen of a cock is considered to be a mixture of the dense semen in vas deferens and the transparent fluid. 2) The greater part of the vas deferens\u27 semen which is able to be collected by repeated manipulations is ejected in the first manipulation, and the bulk of semen is reduced markedly to smaller amount in the following manipulations. The rate of reducton of ejected transparent fluid, however, is lower, so that, the more repeatedly the manipulations occur the more dilute the collected semen becomes. 3) There is considerable variation in the amount of ejected transparent. fluid among individuals, while slight differences in the amount of ejected semen from the vas deferens among individuals are found, and so large amount of dilute semen is collected from individuals which eject more transparent fluid. 4) It seems that the vas . deferens secretes and adds a small amount of some fluid to the semen in it, and the semen in the . vas deferens becomes gladually more dilute in successive daily collection of the semen. 5) The transparent fluid Seems to be also ejected at the time of normal eopulation.(1) 透明液は生殖隆起或は淋巴褶襞の何れか一方又は両者より排出され, 精管内より精液が射出せらるゝに当つて之に添加される, 従つて雄鶏より射出される精液は精管内精液と透明液との混合したものである. (2) 連続4回以上の採取に於て, 精管より射出される精液は第1回にその大半を射出し, 第2回以後は急激に減少するが, 一方透明液の排出量は回次の進むにつれ減少することが少い為, 採取せられた精液は回次の進むにつれ次第に稀薄となる. (3)連続採取の場合, 透明液の排出量は個体に依り大なる差異があり, 一方精管よりの精液の射出量には大なる相違がない為, 透明液の排出量の多い個体ほど多量の稀薄なる精液が採取される. (4) 精管も亦その内に含まれる精管内精液に対して, 僅か乍ら分泌液を添加するものと思はれる. (5) 透明液は自然交尾の際も同様に排出されるものと推定される