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No.17 (1970/12) >

Title :山羊受精卵子の Migration について(畜産学科)
Title alternative :Studies on the intrauterine migration of the fertilized ovum in the goat (Department of Animal Husbandry)
Authors :渡嘉敷, 綏宝
工藤, 規雄
Authors alternative :Tokashiki, Suiho
Kudo, Norio
Issue Date :1-Dec-1970
Abstract :沖縄産山羊40体の左右卵巣黄体数と子宮角内胎児数とを検討し, つぎの成績を得た。1.山羊の排卵は左卵巣よりも右卵巣が優位を示すが, 左右子宮角内の胎児数はほぼ等しく, そのためMigrationを確認したものは全検索例40例中23例で, 57.5%を示した。2.Migrationの方向はすべて排卵機能旺盛な卵巣側から機能の劣る卵巣側へ向うものである。Migrationの結果Cornerのいうがごとく胎児の分布平均するものが多い(57%)が, 工藤のいうOvermigration(過剰移動)により黄体数の少ない側に反って胎児数の多い例も多数(43%)みられる。3.排卵機能の差が大となるにしたがってMigrationの現象も顕著である。すなわちMigrationの動機は左右卵巣の排卵機能不平均によるとのCorner, 工藤の豚についての考察は, 今回の山羊についても肯定される。4.今回の検索例では子宮内胎児死亡例はみられなかったのでMigrationあるいはOvermigrationと胎児死亡との関連については不明である。本研究の要旨は第69回日本獣医学会(1970年4月)において発表した。
The authors studied the numbers of corpus luteums of right and left-side ovaries and embryos in both uterus horns of 40 goats native of Okinawa and obtained the following results. 1. Goats which had dominant right-side ovaries outnumbered those which had dominant left-side ovaries in the number of ovulation, but the occurrences of embryos in both uterus horns of both groups were about the same. It was observed that the rate of intrauterine migration of fertilized ovums was 57.5%-23 out of the 40 individuals. 2. The direction of migration of fertilized ovums always took place from the dominant ovaries to the opposite sides. As the consequence of the migration, there occured two kinds of phenomena.the equalization of embryo numbers in both uterus hornsas Corner expressed andovermigration,as Kudo defined, in which more embryos were found in the uterus horns of the sides of ovaries having lesser number of corpus luteums. Both phenomena occured frequently-the former having been 57% and the latter 43%. 3. The greater the difference of function of ovulation between both ovaries, the greater the rate of the migration of fertilized ovums. The studies of Corner and Kudo on pigs that the migration of fertilized ovums is due to the unbalance of the function of ovulation of both ovaries are also verified by the authors' studies on goats. 4. In the studies there were no early deaths of intrauterine goat embryos that it was not clear the relationship between the migration or overmigration and the early death.
Type Local :紀要論文
ISSN :0370-4246
Publisher :琉球大学農学部
URI :http://hdl.handle.net/20.500.12000/4529
Citation :琉球大学農学部学術報告 = The Science Bulletin of the Faculty of Agriculture. University of the Ryukyus no.17 p.473 -480
Appears in Collections:No.17 (1970/12)

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