@KTzone » 日常 - 寵物地帶 » 蜂群離奇消失 蜜蜂抑鬱死


2011-6-27 12:15 sinta
蜂群離奇消失 蜜蜂抑鬱死

[img]http://hk.apple.nextmedia.com//images/apple-photos/apple/20110627/large/27wc10pap.jpg[/img]
[size=8pt]蜜蜂也會抑鬱,也會沮喪。[/size]

「小蜜蜂,嗡嗡嗡,飛到西又飛到東,不怕風雨勤做工……」連童謠也讚揚的勤力蜜蜂,原來不是大家心想那樣堅毅耐勞,而是會像人那樣情緒低落和抑鬱,一旦遇到壓力,會失去活力和冒險精神,抑鬱到死。科學家相信,這正可能是近十年全球數以十億計蜜蜂離奇消失的原因。


[size=8pt][b]英大學測試 受搖晃失活力[/size][/b]
英國紐卡斯爾大學( Newcastle University)蜜蜂研究所的科學家,找來 100隻工蜂測試。工蜂先要記住兩種不同氣味,兩種氣味分別會帶來甜食和苦食。接着分成兩組,一組要被用力搖晃 60秒,另一組則不用受此酷刑。之後,兩組工蜂要再嗅兩種氣味混合的新氣味,結果未受搖晃的工蜂精力依然旺盛,勇於探究新氣味是否帶來美食;受過搖晃的則全部失去活力和希望,不敢再冒險嘗新。
測試也顯示,受過搖晃的工蜂,體內多巴胺( dopamine)和複合胺( serotonin)水平,低於另一組蜜蜂。人類的腦袋都會產生這兩種化學物質,能影響一個人的情緒。
主持研究的貝特森( Melissa Bateson)解釋,搖晃蜂群是要模仿蜂巢遭侵略對蜜蜂帶來的精神壓力,而殺蟲劑、疾病等都對野生蜜蜂有類似影響,測試顯示外來侵略和影響會令蜜蜂抑鬱。「焦慮沮喪的人,會變得悲觀;抑鬱的蜜蜂,則不願活動和探尋食物新來源。」
心情藍色的蜜蜂,不但危害蜂群的生存,更大大影響人類的食物供應──人類有多達 1/3糧食,包括多種蔬果,都要靠蜜蜂傳播花粉。但蜜蜂近年大規模消失,一些品種比 30年前減少了 95%,美國已有 1/3蜂群消失,科學家對於造成這個蜂群崩潰症候群( Colony Collapse Disorder)現象的原因,未能達成一致看法,氣候變化、濫用殺蟲藥、疾病、城市化令郊區花草減少[節錄...]

來源:蘋果日報網站

2011-8-18 09:38 e770269649
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2011-10-19 20:51 towaiwalk
i see .

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