有鱼和无鱼情况下鱼塘底栖大型无脊椎动物群落评价

Q2 Environmental Science
M. S. G. Moura e Silva, A. J. B. Luiz, M. E. Losekann, Hamilton Hisano
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引用次数: 0

摘要

摘要目的研究尼罗罗非鱼存在和不存在情况下池塘底栖无脊椎动物的结构。方法对两个池塘(有鱼和无鱼)的大型底栖无脊椎动物及其理化参数进行为期8周的分析,每隔15天进行一次。底栖无脊椎动物是用人工基质取样器取样的,这种取样器是用廉价而普通的材料制成的,比如膨胀粘土、丝瓜叶和砾石。结果除浊度外,其他水质理化指标均在罗非鱼养殖的理想范围内。尽管如此,所有监测的物理化学参数都有显著差异,有鱼的池塘的平均浊度要高得多。利用人工底物采样器进行生物监测,可在短时间内(15天)对多个分类群进行定植。在底栖生物群落指标方面,无鱼池的生物丰富度、多样性和均匀度显著高于无鱼池。另一方面,在有鱼的池塘中,手蝇科的优势度和舌蝇科的丰度都要高得多。在两种处理中,该科均为优势科,但在有鱼池中出现频率(98.49%)高于无鱼池(92.87%)。在无鱼的池塘中,细尾蝇科(毛翅目)等敏感科的存在率较高,而蜉蝣目、毛翅目和毛翅目的度量值(% EPT)也较高。结论鱼类的存在改变了大型底栖动物群落,有鱼的池塘丰富度和多样性指标较低。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Community assessment of benthic macroinvertebrates in fishponds in the presence and absence of fish
Abstract Aim In the present study, the structure of the benthic invertebrates in ponds in the presence and absence of Nile tilapia was evaluated. Methods The benthic macroinvertebrates and physicochemical parameters were analyzed for a period of eight weeks, every 15 days, in two ponds (one with fish and the other without fish). Benthic invertebrates were sampled with artificial substrate samplers, made with cheap and common materials, like expanded clay, loofah leaves and gravel. Results With the exception of turbidity, the other physical and chemical variables of water quality were within the ideal limits for tilapia farming. Despite that, there was a significant difference for all physical-chemical parameters monitored, and the average turbidity was much higher in pond with fish. The use of artificial substrate samplers for biomonitoring was effective in the colonization of several taxa in a short period of time (15 days). For benthic community metrics, organism richness, diversity and evenness were significantly higher in the pond without fish. On the other hand, the dominance of Chironomidae and the abundance of Glossiphonidae were much higher in the pond with fish. For Chironomidae, this family was dominant in both treatments, but reached a higher frequency in the pond with fish (98.49%) than in pond without fish (92.87%). The presence of sensitive families, like Leptoceridae (Order Trichoptera), was higher in the pond with no fish, as well as the metric of Ephemeroptera, Plecoptera and Trichoptera families (% EPT). Conclusions The presence of fish altered the macrobenthic community, since metrics of richness and diversity presented lower values in pond with fish.
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来源期刊
Acta Limnologica Brasiliensia
Acta Limnologica Brasiliensia Environmental Science-Ecology
CiteScore
2.20
自引率
0.00%
发文量
17
审稿时长
50 weeks
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