科学家发现拥有“一次性阴茎”的海参
<p>英国广播公司报道，据发布在英国皇家学会《生物学通讯》杂志上的报告称，日本研究者发现，太平洋中一种名为“<span word="Chromodoris">Chromodoris</span> <span word="reticulata">reticulata</span>”的海参能够丢弃、再生、重新使用其阴茎。研究者称其阴茎为“一次性阴茎”。他们认为，它是第一种能使用“一次性阴茎”交配的已知生物。</p><p><span word="A">A</span> <span word="sea">sea</span> <span word="slug">slug</span> <span word="that">that</span> <span word="is">is</span> <span word="able">able</span> <span word="to">to</span> <span word="detach">detach</span>, <span word="re">re</span>-<span word="grow">grow</span> <span word="and">and</span> <span word="then">then</span> <span word="re">re</span>-<span word="use">use</span> <span word="its">its</span> <span word="penis">penis</span> <span word="has">has</span> <span word="surprised">surprised</span> <span word="scientists">scientists</span>.</p><p><span word="Japanese">Japanese</span> <span word="researchers">researchers</span> <span word="observed">observed</span> <span word="the">the</span> <span word="bizarre">bizarre</span> <span word="mating">mating</span> <span word="behaviour">behaviour</span> <span word="in">in</span> <span word="a">a</span> <span word="species">species</span> <span word="called">called</span> <span word="Chromodoris">Chromodoris</span> <span word="reticulata">reticulata</span>, <span word="which">which</span> <span word="is">is</span> <span word="found">found</span> <span word="in">in</span> <span word="the">the</span> <span word="Pacific">Pacific</span> <span word="Ocean">Ocean</span>.</p><p><span word="They">They</span> <span word="believe">believe</span> <span word="this">this</span> <span word="is">is</span> <span word="the">the</span> <span word="first">first</span> <span word="creature">creature</span> <span word="known">known</span> <span word="that">that</span> <span word="can">can</span> <span word="repeatedly">repeatedly</span> <span word="copulate">copulate</span> <span word="with">with</span> <span word="what">what</span> <span word="they">they</span> <span word="describe">describe</span> <span word="as">as</span> <span word="a">a</span> "<span word="disposable">disposable</span> <span word="penis">penis</span>".</p><p><span word="The">The</span> <span word="study">study</span> <span word="is">is</span> <span word="published">published</span> <span word="in">in</span> <span word="the">the</span> <span word="Royal">Royal</span> <span word="Society">Society</span>'<span word="s">s</span> <span word="journal">journal</span> <span word="Biology">Biology</span> <span word="Letters">Letters</span>.</p><p><span word="Male">Male</span> <span word="and">and</span> <span word="female">female</span></p><p><span word="The">The</span> <span word="sex">sex</span> <span word="life">life</span> <span word="of">of</span> <span word="the">the</span> <span word="sea">sea</span> <span word="slug">slug</span> <span word="is">is</span> <span word="complicated">complicated</span> <span word="even">even</span> <span word="before">before</span> <span word="detachable">detachable</span> <span word="organs">organs</span> <span word="come">come</span> <span word="into">into</span> <span word="play">play</span>.</p><p><span word="Almost">Almost</span> <span word="all">all</span> <span word="of">of</span> <span word="these">these</span> <span word="creatures">creatures</span>, <span word="which">which</span> <span word="are">are</span> <span word="also">also</span> <span word="known">known</span> <span word="as">as</span> <span word="nudibranchs">nudibranchs</span>, <span word="are">are</span> <span word="thought">thought</span> <span word="to">to</span> <span word="be">be</span> "<span word="simultaneous">simultaneous</span> <span word="hermaphrodites">hermaphrodites</span>". <span word="This">This</span> <span word="means">means</span> <span word="they">they</span> <span word="have">have</span> <span word="both">both</span> <span word="male">male</span> <span word="and">and</span> <span word="female">female</span> <span word="sexual">sexual</span> <span word="organs">organs</span> <span word="and">and</span> <span word="can">can</span> <span word="use">use</span> <span word="them">them</span> <span word="both">both</span> <span word="at">at</span> <span word="the">the</span> <span word="same">same</span> <span word="time">time</span>.</p><p><span word="Bernard">Bernard</span> <span word="Picton">Picton</span>, <span word="curator">curator</span> <span word="of">of</span> <span word="marine">marine</span> <span word="invertebrates">invertebrates</span> <span word="at">at</span> <span word="the">the</span> <span word="National">National</span> <span word="Museums">Museums</span> <span word="Northern">Northern</span> <span word="Ireland">Ireland</span>, <span word="explained">explained</span>: "<span word="The">The</span> <span word="genital">genital</span> <span word="apparatus">apparatus</span> <span word="is">is</span> <span word="on">on</span> <span word="the">the</span> <span word="right">right</span> <span word="hand">hand</span> <span word="side">side</span> <span word="of">of</span> <span word="the">the</span> <span word="body">body</span>. <span word="So">So</span> <span word="two">two</span> <span word="nudibranchs">nudibranchs</span> <span word="come">come</span> <span word="together">together</span> <span word="and">and</span> <span word="one">one</span> <span word="faces">faces</span> <span word="one">one</span> <span word="way">way</span> <span word="and">and</span> <span word="one">one</span> <span word="faces">faces</span> <span word="the">the</span> <span word="other">other</span> <span word="way">way</span>, <span word="with">with</span> <span word="the">the</span> <span word="right">right</span> <span word="hand">hand</span> <span word="side">side</span> <span word="of">of</span> <span word="their">their</span> <span word="bodies">bodies</span> <span word="touching">touching</span>.</p>
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