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你們真的不知道在中國(guó)養(yǎng)小龍蝦有多難！

2017-09-19 13:28:44 來(lái)源：中國(guó)農(nóng)機(jī)網(wǎng) 閱讀量：51031 評(píng)論

　　【中國(guó)農(nóng)機(jī)網(wǎng) 本站原創(chuàng)】每年5月下旬開(kāi)始，長(zhǎng)江以南的地區(qū)就是吃小龍蝦的天堂，比如湖北湖南小龍蝦餐館的叫賣(mài)，“吃蝦子開(kāi)始了，吃蝦子開(kāi)始了，本店特惠XXX”。因?yàn)樵?月到8月，這期間的小龍蝦為肥美。殊不知，小龍蝦在日本卻成為了當(dāng)?shù)赝鈦?lái)物種禍害的典型代表。
 
　　據(jù)媒體報(bào)道，小龍蝦學(xué)名克氏原螯蝦，原產(chǎn)美國(guó)，1930年隨著美國(guó)商船進(jìn)入日本境內(nèi)。每年夏秋之際(5-11月)北海道釧路市阿寒湖旁，都會(huì)有人前來(lái)捕獲一種中國(guó)人很熟悉的水產(chǎn)：小龍蝦。但是當(dāng)?shù)夭东@小龍蝦并非為了一嘗美味，而是嚴(yán)密控制這種外來(lái)物種的擴(kuò)張，防止破壞湖水生態(tài)。
 
　　由于小龍蝦繁衍太快，1980年代開(kāi)始當(dāng)?shù)卣试S漁民圍捕小龍蝦。當(dāng)?shù)匦『⒆佑袝r(shí)候也會(huì)幫忙捉蝦，每年大約有4噸的收貨量。但是小龍蝦的繁衍速度實(shí)在太快，單靠捕撈完全無(wú)法根除這種生物。所以當(dāng)?shù)氐拇髮W(xué)、農(nóng)業(yè)研究所等對(duì)小龍蝦的繁殖習(xí)慣、生活習(xí)性進(jìn)行跟蹤觀察，以確定更科學(xué)的驅(qū)逐方法。
 
　　在阿寒湖捕獲的小龍蝦，也會(huì)被當(dāng)?shù)厝嗣駠L試送到東京等大城市里當(dāng)成食材。但是這部分?jǐn)?shù)量很少，販賣(mài)小龍蝦的收入也只占了漁民總收入的4%。因此，大家對(duì)賣(mài)小龍蝦還是沒(méi)有太大的興趣。
 
　　那些多余的小龍蝦怎么辦呢？那只好當(dāng)場(chǎng)人道毀滅，漁民直接踩碎了，當(dāng)成肥料了。網(wǎng)友大呼，這又在騙我們?nèi)ト毡境晕r的節(jié)奏?；蛟S，北海道當(dāng)?shù)厝嗣裾娴牟恢涝谥袊?guó)為了吃蝦，養(yǎng)殖的過(guò)程有多么艱辛。
 
　　養(yǎng)蝦也是技術(shù)活，不要簡(jiǎn)單地以為人工養(yǎng)殖淡水河蝦，只需定時(shí)投放飼料。
 
　　首先，育苗設(shè)施有講究。工廠化育苗設(shè)施主要有室內(nèi)孵化池、臺(tái)苗池、供水系統(tǒng)、供氣系統(tǒng)及應(yīng)急供電設(shè)備等。繁殖池、育苗池的面積一般為12～20米²，池水1米左右，建有進(jìn)排水系統(tǒng)及供氣設(shè)施，進(jìn)排水管道以塑料制品為好。
 
　　其次，水源是基本也是重要的因素，它決定著水質(zhì)條件和養(yǎng)殖成敗。一般要求水源穩(wěn)定、充足、清潔、衛(wèi)生、水溫適宜，水質(zhì)良好，無(wú)任何污染，符合國(guó)家漁業(yè)水質(zhì)標(biāo)準(zhǔn)，同時(shí)要求注、排水方便，且單排單注。在注、排水口要建好攔魚(yú)網(wǎng)具，既避免敵害生物及野雜魚(yú)入池，又可防止各種養(yǎng)殖品種的逃逸。
 
　　第三，要增產(chǎn)須調(diào)節(jié)水質(zhì)。精養(yǎng)池塘應(yīng)配備專(zhuān)門(mén)的增氧機(jī)，一般在晴天的中午2時(shí)-3時(shí)開(kāi)機(jī)增氧，有浮頭危險(xiǎn)時(shí)也可開(kāi)機(jī)增氧。增氧機(jī)具有增氧、攪水和曝氣的功能，是目前有效的改善水質(zhì)、防止浮頭、提高產(chǎn)量的專(zhuān)用養(yǎng)殖機(jī)械之一。因此，在池塘養(yǎng)殖小龍蝦時(shí)，高產(chǎn)池塘需要使用增氧機(jī)。目前，我國(guó)已生產(chǎn)出噴水式、水車(chē)式、管葉式、涌噴式、射流式和葉輪式等類(lèi)型的增氧機(jī)，其中以葉輪式增氧機(jī)增氧效果好，在小龍蝦池塘養(yǎng)殖中使用也廣泛。
 
　　據(jù)水產(chǎn)專(zhuān)家試驗(yàn)表明，使用增氧機(jī)的池塘凈產(chǎn)可增長(zhǎng)14%左右。在高產(chǎn)池塘里合理使用增氧機(jī)，具有以下作用:一是促進(jìn)池塘 內(nèi)物質(zhì)循環(huán)的速度，能充分利用水體;二是提前開(kāi)啟機(jī)器，能有效預(yù)防浮頭，穩(wěn)定水質(zhì);三是在浮頭發(fā)生時(shí)，開(kāi)啟增氧機(jī)，可直接解救浮頭，防止池塘進(jìn)一步惡化為泛塘現(xiàn)象；四是可增加魚(yú)種和小龍蝦苗種的放養(yǎng)密度和增加投喂施肥量，從而提高產(chǎn)量。
 
　　雖然，高產(chǎn)養(yǎng)殖小龍蝦的技術(shù)不止這些，但足以看出，這個(gè)在北海道*繁殖，被視為外來(lái)入侵生物的小龍蝦，在中國(guó)人工養(yǎng)殖卻還是個(gè)精細(xì)活。
 
　　注：中國(guó)農(nóng)機(jī)網(wǎng)原創(chuàng)，轉(zhuǎn)載請(qǐng)注明出處，違者必究！
 
　　資料數(shù)據(jù)參考：水產(chǎn)資料大全
 
　　圖片來(lái)源：互聯(lián)網(wǎng)
 

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