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Effect of the wastewater farm rainbow trout (Oncorhynchus mykiss) on benthic invertebrates Esfidan River (North Khorasan)
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Mojtaba Rahmati   , Mohammad Harsij * , Rahman Patimar , Mohammad Gholi Zade |
| University of Gonbad Kavus |
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Abstract: (2111 Views) |
| Entering waste of fish makes the changes in balance of ecosystems the streams and rivers in abundance are benthic macroinvertebrates. In this research, to determine the effect river water of rainbow trout farms by the abundance of benthic macro-invertebrates in the River Esfidan (North Khorasan province), the study of these the river were during summer in four study sites. During study of large benthic invertebrates, 12 orders and 24 families were identified. The more of benthic fauna of the river Esfidan aquatic insect larvae were found. The great abundance of benthic invertebrates at all stations 6601±4266.68 Specimens per square meter were counted. Studies show that between sampling stations indices EPT, EPT/CHIR, Shannon and Hilsenhoff are significant differences (p<0.05). The results of Hilsenhoff biological indicator of water river and quality changes in range from appropriate to very poor that showing of effect the fish farm on the water quality of river. |
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| Keywords: Trout farms, benthic macro-invertebrates, Bio-indicators, Esfidan River |
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Full-Text [PDF 469 kb]
(456 Downloads)
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Type of Study: Research |
Subject:
General
Received: 2016/06/27 | Accepted: 2017/08/24 | Published: 2018/09/16
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