外寄生虫の感染と,宿主の性別偏りのあるローカル募集
P Heeb1, I Werner, A C Mateman
1Zoology Department, University of Bern, Centre for Behaviour and Evolution, Hinterkappelen-Bern, Switzerland. philipp.heeb@esh.unibe.ch
Nature
|July 14, 1999
まとめ
鶏 (Ceratophyllus gallinae) が巨乳 (Parus major) に侵入すると,幼虫の性別比に影響を与え,分散距離が縮小した. 寄生虫は宿主集団と生命史の特徴に大きく影響します.
科学分野:
- エコロジー エコロジー エコロジー
- 進化生物学の進化生物学について
- 寄生虫学とは,寄生虫学である.
背景:
- 生物の分散パターンは,集団遺伝学と社会構造にとって極めて重要です.
- 寄生虫は宿主の生存と繁殖に影響を与え,宿主の分散行動に潜在的に影響を与える.
研究 の 目的:
- ハン・フlea (Ceratophyllus gallinae) の感染が,大乳頭 (Parus major) の幼虫の性に関する募集に影響するかどうかを実験的に調査する.
- 寄生虫が宿主における先天的分散と局所的募集に与える影響を決定する.
主な方法:
- 性別特有のDNAマーカーを利用して,新入生の募集を追跡した.
- 感染したと感染していないオオカミの繁殖の間の3年間の採用パターンと分散距離を比較した.
主要な成果:
- 跳び虫の感染により,1年以内に現地で男性新生児を募集する割合が高くなりました.
- 感染したの群れでは,の大きさに伴い,男性新兵の割合が増加し,感染していないの群れでは減少した.
- ナタルの分散距離は,感染した巣から来た新兵にとって,感染していない巣と比較して短かった.
結論:
- この研究は,寄生虫媒介の宿主産生分散と性に関連した局所的徴募の最初の証拠を示しています.
- 寄生虫は,宿主の生命史の特徴と拡散戦略を形作る重要な要因と考えられるべきである.
- 寄生虫と宿主の相互作用は,集団の動態と進化に深い影響を及ぼします.
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