橈足類動(dòng)物能以通過觸角感知食物的方式來覓食
近日,英國(guó)《生物學(xué)快報(bào)》上在線報(bào)道的一項(xiàng)研究成果"Prey detection in a cruising copepod"證實(shí),,甲殼類動(dòng)物在尋找食物時(shí),,既能對(duì)化學(xué)信號(hào)作出反應(yīng),也可以通過自己的觸角來感知海藻細(xì)胞從而作出響應(yīng),。
長(zhǎng)久以來,,科學(xué)家們都認(rèn)為,,很多被稱作橈足類的微小海洋甲殼類動(dòng)物,,是靠撞見食物來解決自己的晚餐,。
現(xiàn)在,最新的研究發(fā)現(xiàn),事實(shí)也沒有那么痛苦,。
科研人員把一種生活在北方海域的橈足類動(dòng)物,,即細(xì)長(zhǎng)長(zhǎng)腹水蚤,放入海藻培養(yǎng)箱里,,隨后發(fā)現(xiàn)海藻細(xì)胞不用非得撞上水蚤,才能被發(fā)現(xiàn),。
相反,,那些漂浮在細(xì)長(zhǎng)長(zhǎng)腹水蚤觸角附近的海藻能夠引起一種“攻擊響應(yīng)”。在這種響應(yīng)之下,,橈足類動(dòng)物會(huì)產(chǎn)生一種吸力來引誘獵物,。
無論是哪一種方式,此種“食物偵測(cè)法”之前從未被報(bào)道過,,而且這可能有助于解釋橈足類動(dòng)物是如何在海洋里生存的,。因?yàn)樵诤Q笾校瑯镒泐惖氖澄锸侨绱说南∩?,以至于僅僅依靠在夜里撞見食物是填不飽肚子的,。
橈足類動(dòng)物是甲殼綱中最大與最多樣化的族群,是很多經(jīng)濟(jì)魚類,,如鳙魚,、鯡魚和各種幼魚、須鯨類的重要餌料,。(生物谷bioon.com)
doi:10.1098/rsbl.2011.1073
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Prey detection in a cruising copepod
Kjellerup, Sanne; Ki?rboe, Thomas
Small cruising zooplankton depend on remote prey detection and active prey capture for efficient feeding. Direct, passiveinterception of prey is inherently very inefficient at low Reynolds numbers because the viscous boundary layer surroundingthe approaching predator will push away potential prey. Yet, direct interception has been proposed to explain how rapidlycruising, blind copepods feed on non-motile phytoplankton prey. Here, we demonstrate a novel mechanism for prey detectionin a cruising copepod, and describe how motile and non-motile prey are discovered by hydromechanical and tactile or, likely,chemical cues, respectively.