Faculty of Sciences of Bizerte, Laboratory of Environment Biomonitoring, Coastal Ecology and Ecotoxicology Unit, University of Carthage, 7021, Zarzouna, Tunisia.
Zoology Department, College of Science, King Saud University, Box 2455, Riyadh, 11451, Saudi Arabia.
Environ Sci Pollut Res Int. 2021 May;28(17):21303-21313. doi: 10.1007/s11356-020-12069-0. Epub 2021 Jan 7.
In this study, a microcosm experiment was conducted for 30 days to assess the impact of the presence of juvenile gray shrimp Crangon crangon on meiofauna. The results suggested that juvenile shrimp had a significant negative impact on the abundance of nematodes and copepods, but no effect on polychaetes. Moreover, nematodes showed a significant decline in individual weight. The collected nematodes were taxonomically identified and assigned to five functional traits: shapes of the tail and amphid, life history, feeding types, and adult length. The nematode traits were affected by the number of shrimp introduced, and descriptors followed normal or inversed bell-shaped curves. When no shrimp were present, the nematofauna had a higher species richness compared with treatments of 4, 8, and 12 shrimp. Bell-shaped curve patterns were common in relation to the two phases of feeding for C. crangon. During the first phase, C. crangon consumed the nematode species Oncholaimus campylocercoides; thereafter, shrimp fed mostly on the nematode Anticoma eberthi and copepods.
本研究通过 30 天的微宇宙实验，评估了幼体中国毛虾（Crangon crangon）对小型底栖动物的影响。结果表明，幼虾对线虫和桡足类的丰度有显著的负面影响，但对线虫类没有影响。此外，线虫的个体重量呈现显著下降。采集的线虫进行了分类学鉴定，并划分为五个功能特征：尾和触角的形状、生活史、摄食类型和成虫长度。线虫特征受到引入虾数量的影响，描述符遵循正态或倒钟形曲线。当没有虾存在时，线虫动物区系的物种丰富度高于引入 4、8 和 12 只虾的处理组。钟形曲线模式与中国毛虾的两个摄食阶段有关。在第一阶段，中国毛虾消耗线虫物种弯尾毛属（Oncholaimus campylocercoides）；此后，虾主要以线虫拟真棘虫属（Anticoma eberthi）和桡足类为食。
