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Title: | 蜜蜂工蜂磁感受能力與分工職能之差異性 Differentiation of labour division and magnetoreception of honey bee (Apis mellifera) workers |
Authors: | Yu-Wen Chang 張又文 |
Advisor: | 楊恩誠 |
Keyword: | 蜜蜂,生物感磁,古典制約,鐵顆粒,腦, honey bee,magnetoreception,classical condition,iron,brain, |
Publication Year : | 2015 |
Degree: | 碩士 |
Abstract: | 蜜蜂 (Apis mellifera L.)的採集活動需依賴發達的導航系統,其利用感受磁場的能力來協助導航已被廣泛接受。前人研究顯示蜜蜂的行為會受到外加磁場所影響,並在蜜蜂腹部發現超順磁鐵顆粒 (Superparamagnetic magnetite),由於超順磁鐵顆粒會隨外加磁場變化,因此被推論為蜜蜂的磁感受器。隨著蜜蜂日齡的增長,蜜蜂腹部的鐵顆粒沉積量也隨之增加。然而,目前尚未有相關證據證明鐵顆粒的含量會影響蜜蜂的磁感受力與腦處理磁場訊息的區位。本研究以不同日齡的蜜蜂為研究對象,透過古典制約的方式以磁場刺激制約口吻延伸反應,觀察蜜蜂磁感受力的差異;並利用感應耦合電漿質譜分析儀的技術量化腹部鐵顆粒含量,同時,透過2-NBDG的染色技術,探討蜜蜂腦部處理磁感受之區位。研究結果發現,鐵顆粒沉積量會隨著日齡成長而增加,外勤蜂具有較佳的磁感受能力,在外勤蜂中區分出磁感受能力較佳與不佳的個體,發現磁感受能力較佳之外勤蜂,鐵顆粒含量較高。2-NBDG的染色結果顯示,蕈狀體為處理磁場訊息的主要區位,不同磁感受能力之外勤蜂蕈狀體在染色後螢光亮度上有顯著差異。經由內勤蜂與外勤蜂感磁能力的差異與腦部運作區位,本研究有助於了解蜜蜂磁感受能力在行為生態上可能扮演的角色。 The foraging ability of honey bee, Apis mellifera L., relies on a well-developed compass system. In addition to sun position, sun-linked skylight patterns and landmarks, it has been shown that honey bees are able to navigate based on magnetic compass. It is not only when they were stationary but also flying honey bees have the ability to detect the earth’s magnetic field with intensity as low as 26 nano-Tesla (nT). Previous studies showed that the bees are able to sense the magnetic field through the iron granules in their fat bodies and trophocytes mostly located in the ventral abdomen. However, the magnetoreception of honey bee has not been fully elucidated yet and the mechanism behind sensing the magnetic field is still mysterious. Although there are many behavioral evidences to support that honey bees are able to sense magnetic field, the physiological evidence is still needed. To further study honey bee’s magnetoreception, classical conditioning of proboscis extension reflex (PER) with magnetic stimulus and inductively coupled plasma-mass (ICP-MS) was employed in this study. By comparing the difference in magnetic reception, the results showed that forager performed better than nurse bee, and this could be due to the iron granule in honey bees which precipitate along with aging positively. The results showed that there are responsive and non-responsive foragers. With 2-NBDG staining technique, mushroom bodies play an important role in magnetoreception in honey bee’s brain. The intensity of responsive and non-responsive foragers are significantly different. Based on the evidence of neural responses to the changes of magnetic field, it is believed that this study will shed light on the physiology of honey bee magnetoreception. |
URI: | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/51667 |
Fulltext Rights: | 有償授權 |
Appears in Collections: | 昆蟲學系 |
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