SURVEYING THE CHANGES OF SEDIMENT STRUCTURE OF SEABED DUE TO FISHING ACTIVITIES BY TRAWL NETTING METHOD IN THE BAHRAKAN FISHING AREA (PERSIAN GULF)

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SHIRMOHAMMADI MEHRNAZ; DOOSTSHENAS BABAK; DEHGHAN MADISEH SIMIN; SAVARI AHMAD; SAKHAEI NASRIN

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Journal: JOURNAL OF MARINE BIOLOGY Year:2012 | Volume:4 | Issue:13 Page(s): 21-32

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Title

SURVEYING THE CHANGES OF SEDIMENT STRUCTURE OF SEABED DUE TO FISHING ACTIVITIES BY TRAWL NETTING METHOD IN THE BAHRAKAN FISHING AREA (PERSIAN GULF)

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Keywords

TRAWLINGQ2

SEDIMENTQ2

GRAIN SIZEQ2

BAHRAKANQ2

PERSIAN GULFQ2

Abstract

This study took place to survey the changes of seabed characteristic features due to trawl netting in the BAHRAKAN area in 2010. Sampling of SEDIMENT was carried out two times namely once before the season of the fishing activity of trawls and the other two weeks after the end of the trawls activity in BAHRAKAN fishing area, (northwest of PERSIAN GULF). For this purpose, eighteen stations were placed in 6 and 10 m depths. SEDIMENT samples were collected by Van Veen grab (0.025 square meters). Silt and clay percentages were 92.4 to 99.48% and 99.76 to 89.08% in 6 and 10 m depths respectively, that had a significant increase in both depths after TRAWLING (P<0.05). Also the percentage of organic substances was estimated 28.41 to 19.75% and 27.97 to 19.29% in 6 and 10 m depths respectively, that had significantly increased in both depths after TRAWLING (P<0.05). Organic carbon was recorded 12.18 to 4.9 and 12.68 to 4.7 mg/l in 6 and 10 m depths respectively, that was proportionate with organic matter and increased after TRAWLING significantly (P<0.05). In both depths, organic matter showed a significant positive correlation with the organic carbon and the percentage of silt-clay (P<0.05). Our results showed that the impact of TRAWLING on SEDIMENT characteristics had not a specific difference between both depths.

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APA: Copy

SHIRMOHAMMADI, MEHRNAZ, DOOSTSHENAS, BABAK, DEHGHAN MADISEH, SIMIN, SAVARI, AHMAD, & SAKHAEI, NASRIN. (2012). SURVEYING THE CHANGES OF SEDIMENT STRUCTURE OF SEABED DUE TO FISHING ACTIVITIES BY TRAWL NETTING METHOD IN THE BAHRAKAN FISHING AREA (PERSIAN GULF). JOURNAL OF MARINE BIOLOGY, 4(13), 21-32. SID. https://sid.ir/paper/174619/en

Vancouver: Copy

SHIRMOHAMMADI MEHRNAZ, DOOSTSHENAS BABAK, DEHGHAN MADISEH SIMIN, SAVARI AHMAD, SAKHAEI NASRIN. SURVEYING THE CHANGES OF SEDIMENT STRUCTURE OF SEABED DUE TO FISHING ACTIVITIES BY TRAWL NETTING METHOD IN THE BAHRAKAN FISHING AREA (PERSIAN GULF). JOURNAL OF MARINE BIOLOGY[Internet]. 2012;4(13):21-32. Available from: https://sid.ir/paper/174619/en

IEEE: Copy

MEHRNAZ SHIRMOHAMMADI, BABAK DOOSTSHENAS, SIMIN DEHGHAN MADISEH, AHMAD SAVARI, and NASRIN SAKHAEI, “SURVEYING THE CHANGES OF SEDIMENT STRUCTURE OF SEABED DUE TO FISHING ACTIVITIES BY TRAWL NETTING METHOD IN THE BAHRAKAN FISHING AREA (PERSIAN GULF),” JOURNAL OF MARINE BIOLOGY, vol. 4, no. 13, pp. 21–32, 2012, [Online]. Available: https://sid.ir/paper/174619/en

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