Length-weight relationship and condition factor of fish species in shallow freshwater ‎habitats from Khuzestan Province, Iran‎

Publish Year: 1399
نوع سند: مقاله ژورنالی
زبان: English
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شناسه ملی سند علمی:

JR_JWB-4-2_002

تاریخ نمایه سازی: 24 تیر 1399

Abstract:

This study evaluated Length-Weight Relationships (LWRs) and condition factor (K) of the juvenile and young adult fish from shallow littoral zones in some aquatic ecosystems located in Khuzestan province, Iran. In June 2015, the specimens were sampled using a seine net from the Shadegan Wetland, the Dez, and the Karkheh Rivers in the time period of increased juvenile recruitment. The LWRs of fish were calculated using linear regression log formula as log W=loga+blogTL, and the K estimated using K=W/L3. A total of 18 species belong to 5 families collected in the stations. Exotic species comprised 33.33% of the total ichthyofauna. The variation of b-value ranges between 2.65 and 3.26, and the growth pattern is isometric in all species except Acanthobrama marmid. Since the amount of K was higher than one in all species, it can be concluded that the sampling stations are favorable for the growth of the fish.  As a consequence of the decreased floodplain habitats in the surrounding of the water bodies, the shallow waters of littoral zones that have suitable features for the juvenile fish can play an essential role in the survival of the native fish fauna.

Authors

Hussein Valikhani

Department of biodiversity and ecosystem management, Institute of environmental sciences research, Shahid Beheshti University, Tehran, Iran

Jaber Aazami

Assistant Professor, Department of Environmental Sciences, Faculty of Sciences, University of Zanjan, Iran,

Asghar Abdoli

Department of biodiversity and ecosystem management, Institute of environmental sciences research, Shahid Beheshti University, Tehran, Iran

Farshad Nejat

Department of biodiversity and ecosystem management, Institute of environmental sciences research, Shahid Beheshti University, Tehran, Iran

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