Performance of oysters selected for dermo resistance compared to wild oysters in northern Gulf of Mexico estuaries
Performance of oysters selected for dermo resistance compared to wild oysters in northern Gulf of Mexico estuaries
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DOI：
10.3354/aei00222
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发表时间：
2017-01-01
影响因子：
2.2
通讯作者：
La Peyre, Jerome
中科院分区：
文献类型：
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作者：
Casas, Sandra;Walton, William;La Peyre, Jerome
从Louisia na选择的东方牡蛎Crassostrea virginica的后代对由Perkinsus marinus（称为“OBOY”）引起的皮肤病的抗性，以及从美国路易斯安那州（Calcasieu Lake）和亚拉巴马州（Cedar Point，Perdido Pass）河口收集的野生牡蛎的后代，比较它们在水产养殖中的潜在用途。2011年9月，使用可调节延绳钓系统，在亚拉巴马的多芬岛和桑迪湾这两个皮肤病流行地点部署了每个种群的牡蛎种子，每两个月监测一次它们的存活率和壳高度。在部署时以及2012年3月、7月和9月测量了海泛藻感染强度和状况指数。在多芬岛，OBOY种群的死亡率低于其他种群（雪松角、佩尔迪多山口、卡尔卡西欧湖），在桑迪湾，路易斯安那州的两个种群的死亡率低于亚拉巴马种群，桑迪湾是一个稍微含盐的地方。死亡率在夏季增加，特别是在7月和9月之间，伴随着在较高的温度和有利的盐度下增加的P. marinus感染强度。在较高的盐度的网站，路易斯安那州的股票有较低的P. marinus感染强度比Perdido通行证股票，股票的最高百分比的牡蛎中度和重度感染和累积死亡率。OBOY股票达到更大的平均壳高度比Calcasieu湖和Perdido通行证股票。在预期产卵后，牡蛎种群的状况指数在3月至7月期间下降了一半以上。种群表现的差异突出了在墨西哥湾北方皮肤病流行的河口进行水产养殖的种群选择的重要性。
The performance of the progeny of eastern oysters Crassostrea virginica from Louisia na selected for resistance to dermo, caused by Perkinsus marinus (referred to as 'OBOY') and of wild oysters collected from Louisiana (Calcasieu Lake) and Alabama (Cedar Point, Perdido Pass), USA, estuaries was compared for their potential use in aquaculture. Seed oysters from each stock were deployed in September 2011 at 2 dermo-endemic sites, Dauphin Island and Sandy Bay, Alabama, using an adjustable longline system, and their survival and shell heights were monitored bimonthly. P. marinus infection intensity and condition index were measured at deployment and in March, July and September 2012. The OBOY stock showed lower mortality than the unselected stocks (Cedar Point, Perdido Pass, Calcasieu Lake) at Dauphin Island, and both Louisiana stocks had lower mortality than the Alabama stocks at Sandy Bay, a slightly more saline site. Mortality increased in summer, especially between July and September, concomitant with increasing P. marinus infection intensities at the higher temperatures and favorable salinities. At the higher salinity site, both Louisiana stocks had lower P. marinus infection intensities than the Perdido Pass stock, the stock with the highest percentage of oysters with moderate and heavy infection and cumulative mortality. The OBOY stock reached greater mean shell height than Calcasieu Lake and Perdido Pass stocks. Condition index of the oyster stocks decreased by more than half between March and July following expected spawning. Differences in stock performance highlight the importance of stock selection for aquaculture in dermo-endemic estuaries of the northern Gulf of Mexico.