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Paper Information

Journal:   IRANIAN SCIENTIFIC FISHERIES JOURNAL   WINTER 2011 , Volume 19 , Number 4 (73); Page(s) 147 To 152.
 
Paper: 

SPATIAL AND TEMPORAL VARIABILITY OF MACROBENTHIC COMMUNITIES IN CHALUS SHORE OF THE CASPIAN SEA

 
 
Author(s):  TAVOLI M.*, ISLAMI M., MAHDAVI S.M.
 
* COLD WATERS FISHES RESEARCH CENTER, TONEKABON, IRAN
 
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.
 
Keyword(s): BIOMASS, MACROBENTHOS, ECOLOGY, CASPIAN SEA
 
References: 
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