Trophic transfer of cyanobacterial toxins from zooplankton to planktivores: Consequences for pike larvae and mysid shrimps
Trophic transfer of cyanobacterial toxins from zooplankton to planktivores: Consequences for pike larvae and mysid shrimps
复制标题
DOI：
10.1002/tox.20112
复制
发表时间：
2005-06-01
影响因子：
4.5
通讯作者：
Viitasalo, M
中科院分区：
文献类型：
--
作者：
Karjalainen, M;Reinikainen, M;Viitasalo, M
本研究的目的是评估潜在的有害影响的浮游动物预先暴露于蓝藻对两种食虫动物：鱼的幼虫（派克，Esox lucius）和糠虾（Neomysis整数）。摄食的浮游动物从一个自然的社区，已预先暴露于无细胞提取物或纯化的毒素（nodularispumigena）的蓝藻节瘤藻，和生长，摄食，和颗粒生产的摄食，以及颗粒的毒素含量，进行了测量。此外，放射性标记的节球藻毒素（（3）H-二氢节球藻毒素）被用于单独的实验中，以测量节球藻毒素从浮游动物向其捕食者的载体转移。在11天的暴露过程中，溶解的节球藻毒素转移到梭子鱼幼虫和N。整数通过浮游动物在非常低的积累率。用N. spumigena提取物降低梭子鱼幼虫的摄食率和粪便产生率。单独使用纯化的节球藻毒素，没有观察到这样的效果。对蜕皮周期长度、粪粒产生、C：N比或N的生长没有影响。integer被检测到。结果表明，溶解的蓝藻毒素在水华腐烂过程中释放可以有一个负面的影响，喂养，因此，通过浮游动物对鱼苗的生长，即使没有直接接触蓝藻和鱼。(c)2005 Wiley Periodicals，Inc.
The aim of this study was to evaluate the potentially harmful effects of zooplankton preexposed to cyanobacteria on two planktivorous animals: a fish larva (pike, Esox lucius) and a mysid shrimp (Neomysis integer). The planktivores were fed zooplankton from a natural community that had been preexposed to cell-free extract or to purified toxin (nodularin) of the cyanobacterium Nodularia spumigena, and the growth, feeding, and pellet production of the planktivores, as well as the toxin content of the pellets, were measured. In addition, radiolabeled nodularin ((3)H-dihydronodularin) was used in separate experiments to measure the vector transfer of nodularin from zooplankton to their predators. During 11-day exposures, dissolved nodularin was transferred to pike larvae and N. integer via zooplankton at very low rates of accumulation. Treatment with N. spumigena extract decreased the ingestion and feces production rates of pike larvae. With purified nodularin alone, no such effect could be observed. No effect on molting cycle length, fecal pellet production, C:N ratio, or growth of N. integer was detected. The results suggest that dissolved cyanobacterial toxins released during bloom decay can have a negative impact on feeding and, hence, on the growth of fish larvae via zooplankton, even without direct contact between cyanobacteria and the fish. (c) 2005 Wiley Periodicals, Inc.