بكار بررسي استحكام رشته نخ هاي رشته قلاب طويل(Longline Fishing) گرفته شده در ناحيه شمال غربي خليج فارس

Investigating the Strength of Longline Threads Used in the Northwest of the Persian Gulf

اﯾﻦ ﺗﺤﻘﯿﻖ ﺑﺎ ﻫﺪف ﺑﺮرﺳﯽ اﺳﺘﺤﮑﺎم ﻧﺦﻫﺎي ﺻﯿﺪ رﺷﺘﻪ ﻗﻠﺎب ﻃﻮﯾﻞ، ﻗﺒﻞ و ﺑﻌﺪ از اﺳﺘﻔﺎده در ﻋﻤﻠﯿﺎت ﺻﯿﺎدي در ﻣﻨﻄﻘﮥ ﺧﻠﯿﺞﻓﺎرس اﻧﺠﺎم ﺷﺪ. از ﻫﺮ ﻧﺦ ﻧﻮ و ﮐﺎرﮐﺮده ﻃﻨﺎب اﺻﻠﯽ و ﻓﺮﻋﯽ، 10 ﻧﺦ اﻧﺘﺨﺎب و ﺟﻬﺖ ﺑﺮرﺳﯽ ﺑﻪ آزﻣﺎﯾﺸﮕﺎه اﻧﺘﻘﺎل داده ﺷﺪﻧﺪ. ﺟﻬﺖ اﻃﻤﯿﻨﺎن از ﯾﮑﺴﺎن ﺑﻮدن ﻣﻮاد ﺗﺸﮑﯿﻞدﻫﻨﺪة ﻧﺦﻫﺎ، ﺑﺎ اﺳﺘﻔﺎده از دﺳﺘﮕﺎه FTIR ﺟﻨﺲ ﻧﺦﻫﺎ ﺗﺸﺨﯿﺺ داده ﺷﺪ و ﻧﺦﻫﺎي ﻣﻮرد آزﻣﺎﯾﺶ ﺑﻪ ﺻﻮرت ﻧﺦﻫﺎي ﺑﺪون ﮔﺮه و در ﺣﺎﻟﺖ ﺧﺸﮏ ﺟﻬﺖ ﺑﺮرﺳﯽ اﺳﺘﺤﮑﺎم در دﺳﺘﮕﺎه اﯾﻨﺴﺘﺮون ﻗﺮار داده ﺷﺪﻧﺪ. ﻧﺘﺎﯾﺞ ﻣﻘﺎدﯾﺮ اﺳﺘﺤﮑﺎم در ﻣﻘﺎﺑﻞ ﭘﺎرﮔﯽ ﺑﺮاي ﻧﻤﻮﻧﻪﻫﺎي ﻧﺦ ﻧﻮ و ﮐﺎرﮐﺮده در ﻃﻨﺎب اﺻﻠﯽ ﺑﻪ ﺗﺮﺗﯿﺐ 318/74±8/84 و 295/31±6/7 و ﺑﺮاي ﻧﻤﻮﻧﻪﻫﺎي ﻧﺦ ﻧﻮ و ﮐﺎرﮐﺮده در ﻃﻨﺎب ﻓﺮﻋﯽ ﺑﻪ ﺗﺮﺗﯿﺐ 309/65±30/83 و 13/3± 301/1 ﺑﻪ دﺳﺖ آﻣﺪﻧﺪ. ﻧﺘﺎﯾﺞ ﻧﺸﺎن داد ﻣﯿﺎﻧﮕﯿﻦ اﺳﺘﺤﮑﺎم ﻧﺦﻫﺎي ﻧﻮ در ﻃﻨﺎب اﺻﻠﯽ و ﻃﻨﺎب ﻓﺮﻋﯽ از ﻣﯿﺎﻧﮕﯿﻦ اﺳﺘﺤﮑﺎم ﻧﺦﻫﺎي ﮐﺎرﮐﺮده ﻃﻨﺎب اﺻﻠﯽ و ﻃﻨﺎب ﻓﺮﻋﯽ ﺑﯿﺶﺗﺮ اﺳﺖ و ﺑﯿﻦ ﻣﯿﺎﻧﮕﯿﻦ اﺳﺘﺤﮑﺎم در ﻣﻘﺎﺑﻞ ﭘﺎرﮔﯽ ﻧﻤﻮﻧﻪﻫﺎي ﻧﺦ ﻧﻮ و ﮐﺎرﮐﺮده در ﻫﺮ دو ﻃﻨﺎب اﺻﻠﯽ و ﻓﺮﻋﯽ اﺧﺘﻠﺎف ﻣﻌﻨﯽداري وﺟﻮد دارد )0/001

The purpose of this study was to investigate the strength of longline fishing yarns before and after use in fishing operations in the Persian Gulf region. 10 threads were selected from each thread of the original and the secondary rope, and transmitted to the laboratory for review. In order to ensure the uniformity of the yarns, FTIR was detected by the threads of the thread and the yarns were tested in the form of non-knot threads in dry condition to test the strength of the Instron. The results of the values of strength against rupture, for example, threading new and used in rope original order of 318.74 ± 8.84 and 295.31 ± 6.7 for examples of yarn new and used in rope sub 309.65 ± 30.83 and 301.1 ± 13.3 respectively. Results showed that the average yarn strength of the new rope Main rope subsidiary of strength yarns used rope Main rope the sub more. The mean strength against tear samples of yarn new and used in both rope and sub significant difference yarn have there (P< 0.001). The strength of the individual samples of yarn Instron showed that the yarns used in addition to reducing its strength and flexibility and softness are less likely to affect the marine environment and the effects of pressure on the ropes is. In other words, the threads worked after a while, in addition to reducing their strength, they get worse. By examining the samples,