摘要
Sediment samples collected at 33 stations in Tokyo Bay during the autumn of 1999 were examined to determine the distribution and abundance of resting cysts of Alexandrium tamarense and/or A. catenella. Extremely low concentrations of cysts were observed in Tokyo Bay compared with previously investigated sites in the Seto Inland Sea and Lake Hamana which have almost the same marine environmental conditions as found in Tokyo Bay. Cysts were only found in the upper 2.0–3.0 cm of sediment at three stations along the northwestern coast of the bay, at concentrations ranging from 0.8–2.1 cysts cm−3 of wet sediment. All of the observed cysts consisted of the outer thecal integument with no vegetative contents and are therefore concluded to be unable to play a role in the seeding of blooms. Thus, currently the possibility of paralytic shellfish poisoning, caused by a bloom of A. tamarense and/or A. catenella initiated from benthic cysts, is considered to be low in Tokyo Bay. However, commercial shellfish fisheries and recreational shellfish gathering are expected to remain important activities in this bay. Careful monitoring of toxic dinoflagellates and shellfish toxicity is necessary, because invasion by toxic dinoflagellates into Tokyo Bay via ballast water or oceanic water are potential events in the future.
摘要译文
在33站东京湾1999年秋季期间收集的沉积物样本进行了检查，以确定休息亚历山大藻和/或A. catenella囊肿的分布和数量。囊肿，观察在东京湾，在濑户内海和滨名湖先前调查的网站具有在东京湾发现，几乎同样的海洋环境状况进行比较。囊肿只在三站沿着海湾的西北海岸发现在上2.0-3.0厘米沉积物中，其浓度为0.8-2.1厘米的囊肿SUP -3 / SUP湿泥沙。所有的观察囊肿由外腱鞘珠没有营养内容，因此得出的结论是无法发挥开花的种子作用。因此，目前的麻痹性贝毒的可能性，造成A.藻和/或底栖囊肿发起A. catenella的绽放，被认为是低在东京湾。然而，商业贝类渔业和休闲贝类聚会预计将保持在这个海湾的重要活动。仔细监测有毒甲藻和贝类的毒性是必要的，因为入侵有毒腰鞭毛虫到东京湾通过压载水或海洋水是未来的潜在事件。
Yuichi Kotani[1]; Yukihiko Matsuyama[2]; Masao Hayashi[3];Kazumi Matsuoka[4]. Distribution and Abundance of resting cysts of Alexandrium tamarense and/or A. catenella (Dinophyceae) in Tokyo Bay, Japan[J]. Plankton and Benthos Research, 2006,1(3): 147-154