بررسي ذخاير و پراكنش سنگسر ماهيان در آب‌هاي ناحيه شمالي درياي عمان (استان سيستان و بلوچستان)

The stock surveys and distribution of Haemulidae in the northern Oman Sea (Sistan and Baluchistan province

اﯾﻦ ﻣﻄﺎﻟﻌﻪ ﺑﻪﻣﻨﻈﻮر ﭘﺎﯾﺶ ذﺧﺎﯾﺮ ﺧﺎﻧﻮاده ﺳﻨﮕﺴﺮ ﻣﺎﻫﯿﺎن در ﻣﺤﺪوده آبﻫﺎي درﯾﺎي ﻋﻤﺎن، ﻣﺤﺎﺳﺒﻪ ﻣﯿﺰان ﺷﺎﺧﺺ ﺻﯿﺪ ﺑﺮ واﺣﺪ ﺳﻄﺢ و ﺗﻮده زﻧﺪه آنﻫﺎ ﺗﻮﺳﻂ ﮔﺸﺖ ﺗﺤﻘﯿﻘﺎﺗﯽ ﺑﺎ اﺳﺘﻔﺎده از ﮐﺸﺘﯽ ﻓﺮدوس ﯾﮏ، ﻣﺠﻬﺰ ﺑﻪ ﺗﻮر ﺗﺮال ﮐﻒ از دﻣﺎﻏﻪ ﻣﯿﺪاﻧﯽ )'58˚55( ﻃﻮل ﺷﺮﻗﯽ ﺗﺎ ﺧﻠﯿﺞ ﮔﻮاﺗﺮ در آبﻫﺎي اﺳﺘﺎن ﺳﯿﺴﺘﺎن و ﺑﻠﻮﭼﺴﺘﺎن )'61˚25( ﻃﻮل ﺷﺮﻗﯽ در ﺳﺎل 1392 ﺑﻪ اﺟﺮا درآﻣﺪ. ﮐﻞ ﻣﻨﻄﻘﻪ ﻣﻮردﺑﺮرﺳﯽ در اﯾﻦ ﺗﺤﻘﯿﻖ ﺑﻪ ﭘﻨﺞ اﺷﮑﻮب )A ﺗﺎ E( و اﻋﻤﺎق ﺗﺤﺖ ﭘﻮﺷﺶ )4 ﻻﯾﻪ ﻋﻤﻘﯽ( 30-50 ،20-30 ،10-20 و 50-100 ﻣﺘﺮي ﺑﻪ ﺗﻌﺪاد 82 اﯾﺴﺘﮕﺎه در درﯾﺎي ﻋﻤﺎن ﺗﻘﺴﯿﻢ ﺷﺪ. اﻃﻼﻋﺎت ﻻزم ﻣﺎﻧﻨﺪ ﻣﻮﻗﻌﯿﺖ ﺟﻐﺮاﻓﯿﺎﯾﯽ، ﻋﻤﻖ، ﻣﺴﺎﻓﺖ ﭘﯿﻤﻮده ﺷﺪه و اﺷﮑﻮب ﺛﺒﺖ ﺷﺪ. آﺑﺰﯾﺎن ﺻﯿﺪﺷﺪه ﭘﺲ از ﺗﺨﻠﯿﻪ در ﻋﺮﺷﻪ ﮐﺸﺘﯽ ازﻧﻈﺮ ﺧﺎﻧﻮاده ﺟﺪاﺳﺎزي و ﺳﭙﺲ ﺷﻤﺎرش و ﺗﻮزﯾﻦ ﺷﺪﻧﺪ و ﻣﺤﺎﺳﺒﻪ ﻣﯿﺰان ﺻﯿﺪ ﺑﺮ واﺣﺪ ﺳﻄﺢ و ﺗﻮده زﻧﺪه اﻧﺠﺎم ﺷﺪ. ﺑﯿﺸﺘﺮﯾﻦ ﻣﯿﺰان ﺗﻮده زﻧﺪه ﺧﺎﻧﻮاده ﺳﻨﮕﺴﺮ ﻣﺎﻫﯿﺎن ﻣﺮﺑﻮط ﺑﻪ ﻣﻨﻄﻘﻪ B )ﺻﯿﺪﮔﺎهﻫﺎي درك، ﻣﮑﯽ ﺳﯽ، ﺗﻨﮓ و دﻣﺎﻏﻪ( ﺑﻪ ﻣﯿﺰان 439/2 ﺗﻦ و ﺑﯿﺸﺘﺮﯾﻦ ﻣﻘﺪار ﺷﺎﺧﺺ ﺻﯿﺪ ﺑﺮ واﺣﺪ ﺳﻄﺢ )CPUA(، 1213/8 ﮐﯿﻠﻮﮔﺮم ﺑﺮ ﻣﺎﯾﻞ ﻣﺮﺑﻊ درﯾﺎﯾﯽ، در اﺷﮑﻮب B ﻣﺤﺎﺳﺒﻪ ﺷﺪ. ﺑﺮ اﺳﺎس ﻻﯾﻪﻫﺎي ﻋﻤﻘﯽ ﺑﯿﺸﺘﺮﯾﻦ ﻣﯿﺰان ﺷﺎﺧﺺ ﺻﯿﺪ ﺑﺮ واﺣﺪ ﺳﻄﺢ در ﻻﯾﻪ ﻋﻤﻘﯽ 30-50 ﻣﺘﺮ ﺑﻪ ﻣﯿﺰان 455/9 ﮐﯿﻠﻮﮔﺮم ﺑﺮ ﻣﺎﯾﻞ ﻣﺮﺑﻊ درﯾﺎﯾﯽ و ﺑﯿﺸﺘﺮﯾﻦ ﻣﯿﺰان ﺗﻮده زﻧﺪه، 405/2 ﺗﻦ در ﻻﯾﻪ ﻋﻤﻘﯽ 50-100 ﻣﺘﺮ ﻣﺤﺎﺳﺒﻪ ﮔﺮدﯾﺪ. درﻧﻬﺎﯾﺖ ﻧﻤﻮدار ﭘﺮاﮐﻨﺶ ﻋﻤﻘﯽ و ﻧﻘﺸﻪ ﭘﺮاﮐﻨﺶ ﺧﺎﻧﻮاده ﺳﻨﮕﺴﺮ ﻣﺎﻫﯿﺎن ﺑﻪ ﮐﻤﮏ ﻧﺮماﻓﺰار Arcview-GIS ﺗﺮﺳﯿﻢ ﺷﺪ. ﺑﺮ اﺳﺎس ﯾﺎﻓﺘﻪﻫﺎ ﻣﯽﺗﻮان ﻧﺘﯿﺠﻪ ﮔﺮﻓﺖ ﺑﻬﺘﺮﯾﻦ ﻣﮑﺎن ﺑﺮاي ﺻﯿﺪ و زﯾﺴﺘﮕﺎه اﺻﻠﯽ اﯾﻦ ﺧﺎﻧﻮاده ﻣﻨﻄﻘﻪ B و ﻻﯾﻪ ﻋﻤﻘﯽ ﺗﺮﺟﯿﺤﯽ 50-100 ﻣﺘﺮ اﺳﺖ ﮐﻪ ﺑﻪ ﻋﻠﺖ ﻓﺎﮐﺘﻮرﻫﺎي ﻣﺘﻨﻮع زﯾﺴﺘﯽ و ﻏﯿﺮ زﯾﺴﺘﯽ ﻣﺎﻧﻨﺪ ﺷﮑﺎر ﯾﺎ ﺷﮑﺎرﮔﺮي، دﻣﺎ، ﺷﻮري و ﻧﻮع ﺑﺴﺘﺮ ﻣﯽﺑﺎﺷﺪ.

This research was carried out to assess the amount of the biomass and Catch Per Unit of Area (CPUA) and also to determine the distribution pattern of the haemulidae family in the northern parts equipped with trawl floor area cape of meydani ('58 ˚55) east To Govater (61°25׳) east in the waters of the Oman Sea (Sistan and Baluchistan province) based on trawl survey results in 2013 by R/V Ferdows-1. The area divided to the 5 regions (A, B, C, D, E), with deep layer of 10-20 meters, 20-30 meters, 30-50 meters and 50-100 meters at a total 82 stations, were determined. Required information such as geographic location, depth, covered distance and silence were recorded. The fish caught after being unloaded on the deck were separated from the family and then counted and weighed and calculation of catch per unit area and live mass was performed.The highest biomass and CPUA of haemulidae was recorded approximately 439.2 tons and 1213.8 kg/nm2 in the stratum B and for depth layer of 30-50 m with value of 455.9 kg/nm2 and the highest biomass for depth layer of 50-100 m with value of 405.2 tones. Finally depth distribution chart and distribution map was drawn with Arcview-GIS software. The findings can be concluded that best region for hunting and main habitat for Haemulidae are B stratum and Preferential depth layer is 50-100 m,that Due to different biological and non-organic factors as hunting, temperature, salin