...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Marine biology >Effects of the dinoflagellates Karlodinium veneficum and Prorocentrum minimum on early life history stages of the eastern oyster {Crassostrea virginica)
【24h】

Effects of the dinoflagellates Karlodinium veneficum and Prorocentrum minimum on early life history stages of the eastern oyster {Crassostrea virginica)

机译：鞭毛藻和小中心藻对东部牡蛎（Crassostrea virginica）早期生活史阶段的影响

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The bloom-forming dinoflagellates Prorocentrum minimum and Karlodinium veneficum can have detrimental effects on some marine life, including shellfish, but little is known about their effects on early life history stages of bivalves. In the Chesapeake Bay region, blooms of these dinoflagellates overlap with the spawning season of the eastern oyster, Crassostrea virginica. In laboratory experiments, we compared the effects of P. minimum and K. veneficum on the survival and development of embryos and larvae of the eastern oyster. At 10~4 cells ml~(-1), P. minimum did not have a negative effect on embryos and larvae in 2-day exposures. The yield of D-hinge larvae was equal to or greater than in control treatments. At 2 × 10~4 cells ml~(-1) (approximately equal biomass to the P. minimum treatment) K. veneficum caused significant mortality to oyster embryos within 1 day and almost no embryos developed into D-hinge larvae. This effect was not alleviated by the provision of an alternate food source (Isochrysis sp.). Significant mortality was observed when larvae were exposed to K. veneficum at concentrations of 10~4 cells ml~(-1) (approximately 5 ng ml~(-1) of karlotoxin). The K. veneficum cultures used in these experiments were relatively low in toxin content, more toxic strains could be expected to cause mortality at lower cell concentrations. Survival and maturation of embryos and larvae may be reduced when spawns of the eastern oyster coincide with high bloom densities of K. veneficum.
机译：绽放形成的鞭毛纲最低原螯虾和金缕梅可能对某些海洋生物（包括贝类）产生有害影响，但对其对双壳类动物早期生命史阶段的影响知之甚少。在切萨皮克湾地区，这些鞭毛藻的繁殖与东部牡蛎Crassostrea virginica的产卵季节重叠。在实验室实验中，我们比较了最小体育对虾和K. veneficum对东部牡蛎胚胎和幼虫存活和发育的影响。在10〜4个细胞ml〜（-1）下，最小P.对暴露2天的胚胎和幼虫没有负面影响。 D-铰链幼虫的产量等于或大于对照处理。在2×10〜4个细胞ml〜（-1）（生物量与最小化假单胞菌处理相等）下，金黄色K. veneficum在1天之内对牡蛎胚胎造成了明显的死亡，几乎没有胚胎发育成D型铰链幼虫。提供其他食物来源（Isochrysis sp。）并不能减轻这种影响。当幼虫暴露于浓度为10〜4个细胞ml〜（-1）（约5 ng ml〜（-1）的卡洛托辛）的K. veneficum时，观察到显着的死亡率。这些实验中使用的K. veneficum培养物的毒素含量相对较低，在较低的细胞浓度下，预期毒性更大的菌株会导致死亡。当东部牡蛎的产卵与高浓度的K. veneficum吻合时，胚胎和幼虫的存活和成熟可能会减少。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号