Effects of Pairing on Egg Laying in the Emu
| Autor: | Michinari, Yokohama, Jinushi Hiroyuki, Imai Satoshi, Ikeya Kei |
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| Jazyk: | angličtina |
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| Popis: | エミューは環境適用性に優れた走鳥類で,北海道・網走市ではオイル(機能性物質)生産を主要目的に飼育・増殖されている。しかし,生産家禽として扱うためには,産卵性,受精率,孵化率等に関して改善しなければならい課題が多い。そこで,本研究ではエミューの産卵数の向上を目的として,ペアリングと産卵性との関連を調査した。産卵期間は,11月から翌年5月までの7カ月であった。最も産卵数の多い時期は2月と3月で,それぞれ25.79%と30.94%であった。ペアリングと産卵性の関係について,雌・雄同比率繁殖群の産卵数(雌1羽当たりの産卵数が18.50個)は,集団及び雌・雄異比率繁殖群(それぞれ雌1羽当たり6.55個と9.51個)に比べ有意に高かった(p The emu is a ratite with marked environmental adaptability, bred in Abashiri City, Hokkaido mainly for oil (functional material) production. However, laying, fertility, and hatchability should be improved for mass breeding. Thus, in the present study, we investigated the relationship between pairing and laying to improve egg production. The laying period was seven months between November and May of the following year. Egg production was highest in February and March at 25.79 and 30.94%, respectively. The relationship between pairing and laying demonstrated that egg production in breeding groups of equal female-to-male ratios (18.50 eggs per female) was significantly higher than those of population breeding groups and breeding groups with unequal female-to-male ratios (6.55 and 9.51 eggs per female, respectively) (p |
| Databáze: | OpenAIRE |
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