School of Natural Sciences, Marine Ecology and Evolution Biology, Linnaeus University, Barlastgatan 11, S-39182 Kalmar, Sweden.
Toxicon. 2011 Jun;57(7-8):1033-40. doi: 10.1016/j.toxicon.2011.04.007. Epub 2011 Apr 20.
This study reveals that both cyanobacterial toxicity and turbidity have the potential to reduce the growth and energy storage of young-of-the-year (YOY) perch and thereby influence survival rates. During the 1990's a reduction in recruitment of YOY perch (Perca fluviatilis) occurred along the Swedish East coast. Concurrently, large blooms of filamentous cyanobacteria have increased in the Baltic Proper and in coastal waters. This study examined whether extended exposure to toxic and non-toxic filamentous cyanobacterium Nodularia affect YOY perch growth and feeding behavior under simulated bloom conditions (30 days at 50 μg Chl a L(-1)). Specific growth rate (SGR), the somatic condition index (SCI) and the lipid content of YOY perch (10-12 weeks old) were significantly lower in perch exposed to Nodularia compared to fed controls (no Nodularia). YOY perch exposed to non-toxic Nodularia displayed a higher attack rate than perch living in Nodularia free controls in 2 out of 3 trials. Reductions in growth and energy storage, mediated by cyanobacteria, increase the risk of starvation and predation and could locally influence recruitment of YOY perch.
本研究表明，蓝藻的毒性和浊度都有可能降低幼鱼（YOY）鲈鱼的生长和储能，从而影响其存活率。在 20 世纪 90 年代，瑞典东海岸幼鱼鲈鱼（Perca fluviatilis）的补充数量减少。与此同时，波罗的海和沿海水域的丝状蓝藻大量繁殖。本研究考察了在模拟水华条件下（30 天，50 μg Chl a L(-1))，延长接触有毒和无毒丝状蓝藻节球藻对 YOY 鲈鱼生长和摄食行为的影响。与投喂对照组（无节球藻）相比，暴露于节球藻中的幼鱼鲈鱼的特定生长率（SGR）、躯体状况指数（SCI）和脂质含量显著降低。在 3 次试验中的 2 次中，暴露于无毒节球藻的幼鱼鲈鱼的攻击率高于生活在无节球藻对照组中的幼鱼鲈鱼。蓝藻介导的生长和储能减少，增加了饥饿和被捕食的风险，并可能在当地影响幼鱼鲈鱼的补充。
