Density and identification of macrobenthose Haraz river influenced rainbow trout farm

Document Type : scientific research article

Authors

1 gonbad univercity,fisheri

2 gonbad kavos,shahid falahi,univercity gonbad

3 univercity gonbad

4 univercity gorgan

5 univercity gonbad kavos

Abstract

Recognizing and investigating the resources of surface water, especially rivers and streams, which are in fact not just strategic sources, are important for the management of well-being. For this purpose, the effect of rainbow trout breeding workshop on the fauna and the number of macro-benthos in the river Haraz were investigated . Sampling was performed seasonally in two seasons of summer and autumn of 1393 by Surber Sampler with three replications at each station. A total of 4 stations were set up before and after the fish breeding farm. In the laboratory, cluster bands were examined qualitatively and quantitatively in the genus or species. The results of the study showed the presence of 11 classes or macrobenthic sequences belonging to 19 families. Most of the genus was Diptera family with 9 genera and 13 genera were identified from other classes. Sampling showed that the highest percentage of Baetidae family was found in Ephemeroptera.
The biggest impact of workshop pollution was on Ephemeropterta, Terichoptera and Plecoptera, which is known as the sensitive group of EPT and has reduced its population at station 3 (outlet). On the contrary, the population of the Chironomidae, which is resistant to pollution, has increased.

Keywords

References

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Journal of Utilization and Cultivation of Aquatics
Volume 8, Issue 1
May 2019
Pages 47-55

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