Spatial and temporal variability of macrobenthic communities in Chalus Shore of the Caspian Sea | ||
| مجله علمی شیلات ایران | ||
| Article 15, Volume 19, Issue 4, June 2011, Pages 147-152 PDF (799.32 K) | ||
| DOI: 10.22092/isfj.2017.109969 | ||
| Authors | ||
| M. Tavoli* ; M. Islami; S.M. Mahdavi | ||
| Abstract | ||
| The changes in density and biomass of macrobenthos were seasonally investigated from winter 2005 till fall 2006 in southern Caspian Sea. Samples were taken with a 225cm2 Van Veen grab from depths of 7 and 20 meters along two transects: Line 8 area (western part) and Radio Darya area (eastern part). Totally, 5 classes of macrobenthos were identified of which the most abundant populations were Polychaeta 68.7%, Oligochaeta 14.6%, Bivalvia 8.5%, Crustacea 8.2% and Gastropoda 0.08%. The maximum density (4251.8 1419 (ME SE) ind/m2) of macrobenthos was observed during summer in the depth of 20m of Radio Darya area, while the minimum density (725.9 64.5 (ME SE) ind/m2) was observed during spring in the depth of 7m in the same area. Between the two studied depths, the mean annual density in 7m depth (2266.7 350.3 (ME SE)ind/m2), was higher from 20m depth (1977.8 290.1 (ME SE)ind/m2). The maximum biomass (475 243.8 (ME SE)g/m2), of macrobenthos was observed during autumn in the depth of 20 meter of Radio Darya area, while the minimum biomass (0.3 0.1 (ME SE)g/m2), was observed during winter in the depth of 7m in the same area. Between the two studied depths, the mean annual biomass in 20m depth (184.8 24.6 (ME SE)g/m2), was higher from 7m depth (73.7 24.6 (ME SE)g/m2). Generally speaking, the eastern part of Chalus coast had more density and biomass compared with the western part. *Corresponding author | ||
| Keywords | ||
| biomass; Macrobenthos; Ecology; Caspian Sea | ||
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