微型裸腹溞在不同餌料環(huán)境馴化下的攝食行為【開題報告】

1、<p><b>　　畢業(yè)論文開題報告</b></p><p><b>　　海洋生物資源與環(huán)境</b></p><p>　　微型裸腹溞在不同餌料環(huán)境馴化下的攝食行為</p><p>　　一、選題的背景與意義</p><p>　　近幾十年隨著人類活動的加劇，我國的淡水湖泊富營養(yǎng)化現(xiàn)象日趨嚴重。

2、湖泊富營養(yǎng)化常伴隨著夏季藍藻水華的爆發(fā)。微囊藻是藍藻水華的常見類群。因微囊藻缺乏營養(yǎng)價值并能產(chǎn)生微囊藻毒素(MC ) ,而被認為是對浮游動物有毒害作用的藻類。</p><p>　　在淡水生態(tài)系統(tǒng)中，浮游動物多以浮游植物為食，同時它們又是較高營養(yǎng)級生物的捕食對象，因此浮游動物在淡水生態(tài)系統(tǒng)食物鏈中起著重要的樞紐作用。有研究表明水華藍藻對浮游動物的危害不但會導致浮游動物群落結構的變動，而且對次級生產(chǎn)力也會產(chǎn)生深遠的影

3、響，這些影響包括水華藍藻降低浮游動物的存活率、抑制生長和繁殖、降低攝食率等。</p><p>　　枝角類可以攝食水華藍藻的代表——銅綠微囊藻。然而枝角類的品種不同，適應溫度大小和生理狀況，微囊藻的存在狀態(tài)和數(shù)量，光照等都會枝角類攝食藍藻有影響，但這一方面的研究報道相對較少。本文希望通過研究銅綠微囊藻（Microcystis aeruginosa）對微型裸腹溞（Moina micrura）攝食行為的影響，確定經(jīng)自然

4、馴化和人工馴化后枝角類攝食行為是否改變，探討是否經(jīng)過馴化的微型裸腹溞比在對藍藻有更強的適應性。從而為治理水華提供更好的理論依據(jù)。</p><p>　　二、研究的基本內(nèi)容與擬解決的主要問題：</p><p>　　研究基本內(nèi)容：在藍藻的自燃馴化條件下，藍藻對枝角類攝食行為的影響；</p><p>　　在藍藻的人工馴化條件下，藍藻對枝角類攝食行為的影響。</p>

5、;<p><b>　　擬解決的主要問題：</b></p><p>　　如何借助別針和真空硅膠黏住枝角類的背部，并盡量降低對其活性的影響；</p><p>　　如何于解剖鏡下觀察并準確數(shù)出枝角類小顎的吞咽頻率和尾爪的拒食頻率。</p><p>　　三、研究的方法與技術路線：</p><p><b>

6、　　研究方法：</b></p><p>　　在人工條件下馴化微型裸腹藻；</p><p>　　獲取自燃馴化的微型裸腹藻；</p><p>　　于解剖鏡下觀察并數(shù)出枝角類的小顎的吞咽頻率和尾爪的拒食頻率。</p><p><b>　　技術路線： </b></p><p>　　四、研究的總

7、體安排與進度：</p><p>　　1、20010.7-2010.9 微囊藻對微型裸腹藻攝食行為影響的實驗、外文文獻翻譯；</p><p>　　2、2010.11-2010.12 撰寫文獻綜述、開題報告、任務書等；</p><p>　　3、2011.4-2011.5 數(shù)據(jù)整理，修改、完成論文定稿，畢業(yè)論文答辯。</p><p><

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