書誌事項
- タイトル別名
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- Decreased number of eggs spawned and fertilization rate associated with the damage of male fins in medaka, <i>Oryzias latipes</i> - potential effect of exotic species, mosquitofish, <i>Gambusia affinis</i>, on reproduction
- メダカOryzias latipesにおける雄の鰭の損傷による産卵数および受精率の低下--外来種カダヤシGambusia affinisが与える繁殖への潜在的影響
- メダカ Oryzias latipes ニ オケル オス ノ ヒレ ノ ソンショウ ニ ヨル サンランスウ オヨビ ジュセイリツ ノ テイカ ガイライシュ カダヤシ Gambusia affinis ガ アタエル ハンショク エノ センザイテキ エイキョウ
- ―外来種カダヤシ<i>Gambusia affinis</i>が与える繁殖への潜在的影響―
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説明
<p>Medaka (Oryzias latipes), an indigenous species in Japan, has decreased in population size in many areas since the first introduction of mosquitofish (Gambusia affinis) in 1916. It is known that predation and aggressive attacks by mosquitofish cause damage to the fins of medaka as well as direct mortality. By experimentally manipulating fin size, we examined the potential effects of damaged anal and caudal fins in male medaka on reproduction. Decreased size of anal fin resulted in a decrease in the number of eggs spawned and the proportion of eggs fertilized. By contrast, decreased size of caudal fin decreased the number of eggs spawned but did not affect fertilization rate. Our results show that damaged anal and caudal fins may give rise to different effects on reproduction in medaka, probably due to the different roles in reproductive behavior.</p>
収録刊行物
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- 野生生物保護
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野生生物保護 10 (1-2), 1-7, 2006
「野生生物と社会」学会
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詳細情報 詳細情報について
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- CRID
- 1390001205350467200
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- NII論文ID
- 40016094663
- 130006321396
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- NII書誌ID
- AA11473258
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- ISSN
- 24331252
- 13418777
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- NDL書誌ID
- 9539646
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- 本文言語コード
- ja
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- データソース種別
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- JaLC
- NDLサーチ
- CiNii Articles
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- 抄録ライセンスフラグ
- 使用不可