譯 小圓 校 胡路怡 中國(guó)水產(chǎn)頻道獨(dú)家報(bào)道，日前，在2013年全球水產(chǎn)聯(lián)盟年會(huì)的座談小組上，有專(zhuān)家談到“斑節(jié)對(duì)蝦對(duì)EMS的反應(yīng)可以為治療該疾病提供線(xiàn)索”。 馬來(lái)西亞Agrobest有限公司總經(jīng)理Noriaki Akazawa博士說(shuō)，即使養(yǎng)殖在同一個(gè)池塘里，南美白對(duì)蝦被EMS感染，斑節(jié)對(duì)蝦也不會(huì)發(fā)病。而正大集團(tuán)的Robins McIntosh說(shuō)，“斑節(jié)對(duì)蝦易感染EMS,但其感染之后卻有著較好的存活率。斑節(jié)對(duì)蝦感染EMS后不會(huì)立刻死亡，除非人為投喂病菌。” Robins McIntosh認(rèn)為，這是預(yù)防EMS暴發(fā)的眾多線(xiàn)索之一，還需要探索。另外，與紅羅非魚(yú)混養(yǎng)也是一個(gè)值得探索的方式。如果采用對(duì)蝦與尼羅紅混養(yǎng)的養(yǎng)殖模式，對(duì)蝦暴發(fā)EMS的風(fēng)險(xiǎn)可大大減小。 “這種混養(yǎng)的模式為EMS治愈提供一個(gè)線(xiàn)索”Robins McIntosh說(shuō)�！拔覀円舶l(fā)現(xiàn)EMS病原菌對(duì)鹽度極其敏感，鹽度越高的水環(huán)境，對(duì)蝦存活率越低（編注：原文為鹽度越高，對(duì)蝦存活率越高。譯者認(rèn)為可能是作者失誤。）。 不久前，Akazawa博士發(fā)現(xiàn)在高pH值下更易暴發(fā)EMS——這一結(jié)果得到了全球水產(chǎn)養(yǎng)殖聯(lián)盟主席George Chamberlain的認(rèn)可。他的蝦場(chǎng)有著亞洲“最好的管理”和詳細(xì)的數(shù)據(jù)收集。他收集了兩次他的蝦塘大規(guī)模暴發(fā)EMS的數(shù)據(jù)，一次是在2010年底2011年初，一次是在2013年年中。 “2010年暴發(fā)的那次EMS很?chē)?yán)重，但產(chǎn)量恢復(fù)過(guò)來(lái)后，密度達(dá)到85尾/米2，存活率80%-95%�！盇kazawa博士說(shuō)，相比之下，第二次暴發(fā)的EMS嚴(yán)重程度輕很多，對(duì)蝦死亡率較低。 專(zhuān)家預(yù)計(jì)今年泰國(guó)對(duì)蝦將減產(chǎn)至30萬(wàn)噸以下，約28萬(wàn)噸左右。根據(jù)McIntosh的樂(lè)觀估計(jì)，2017年對(duì)蝦產(chǎn)量有望恢復(fù)到60萬(wàn)噸左右。而也有學(xué)者悲觀的認(rèn)為，到2017年泰國(guó)產(chǎn)量只可能恢復(fù)到30萬(wàn)噸。 【關(guān)鍵字】：斑節(jié)對(duì)蝦 對(duì)EMS反應(yīng) 治愈提供線(xiàn)索 以下為原文： Black tiger reaction to EMS offers clues on disease October 9, 2013, 11:12 am Eva Tallaksen The reaction of Black tiger, or Penaeus monodon, to the early mortality syndrome (EMS) bacteria can offer some clues into the disease, said speakers during a panel at GOAL 2013 in Paris. Noriaki Akasawa, managing director of the Malaysian shrimp farm Agrobest, said black tiger shrimp were never infected by EMS, even if they were raised in the same ponds as infected vannamei. However, black tiger are susceptible to EMS, said Robins McIntosh, of Charoen Pokphand Foods. “Black tiger seems to survive much better,” he said. But while it doesn’t die in the ponds, “if you feed it the bacteria, it dies.” What goes on there is one of the many clues to EMS that are needed to explore, said McIntosh. Another clue, he said, involves tilapia. The mortality of shrimp from EMS declines if you have tilapia in the water. “That’s a clue there.” The EMS bacteria has also been found to be highly sensitive to salinity, and does not survive well in high salinity areas, he said. Akasawa — who was credited by GAA’s president George Chamberlain for having discovered the effect of high PH on EMS, and for having Asia’s ”best managed” farm and thorough data collection — detailed how his farm had been hit by two EMS outbreaks, one in late 2010/early 2011, and another in mid-2013. The first outbreak was serious, but production recovered and was gradually re-established to 85p/square meter, with 80-95% survival rates, he said. In comparison, the second outbreak was far worse, and the mortality was much slower. With Thai production levels due to fall to less than 300,000 metric tons this year, to around 280,000t, predictions as to its recovery are anyone’s guess. The most optimistic scenarios, according to a slide by McIntosh, foresee a recovery to 600,000 by 2017, whereas the pessimistic outlooks predict volumes of just above 300,000 by 2017. |
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