A Theoretical Approach to Determine the Total Resistance on Different Trawl Gears Used in Turkey
The study aims to theoretically determine the total resistance forces acting on bottom trawls used in the commercial trawl fishery around the Turkish Peninsula. For this purpose, a total of 14 (2 for Black Sea, 2 for Sea of Marmara, 6 for Aegean Sea and 4 Mediterranean Sea) trawl gears were examined...
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| Language: | English |
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Istanbul University Press
2022-03-01
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| Series: | Aquatic Sciences and Engineering |
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| Online Access: | https://cdn.istanbul.edu.tr/file/JTA6CLJ8T5/690F7094D4924F0F93E5957D8B40A470 |
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| author | Ozan Soykan Celalettin Aydın |
| author_facet | Ozan Soykan Celalettin Aydın |
| author_sort | Ozan Soykan |
| collection | DOAJ |
| description | The study aims to theoretically determine the total resistance forces acting on bottom trawls used in the commercial trawl fishery around the Turkish Peninsula. For this purpose, a total of 14 (2 for Black Sea, 2 for Sea of Marmara, 6 for Aegean Sea and 4 Mediterranean Sea) trawl gears were examined during the study representing all types of the bottom trawl fishery (e.g., fish targeted, shrimp targeted and mix) in Turkey. The calculation of the hydrodynamic forces of the gears was based on the determination of each gear component; net, floaters, sweep, door, warp and the friction force caused by footrope, sweep and door. The total resistance of trawl gears was calculated according to different towing speeds and warp lengths. Average resistance values of the examined nets with a 500 m warp length indicated that the frictional force of the trawl door composed more than 41.3% of the total resistance, followed by net (39.4%), both doors (6.3%), footrope friction (6.1%), sweep frictions (3.1%) and the rest belonged to sweeps, warps and floaters (totally 3.8%). It was determined that resistance caused by friction including sweeps, footrope and doors constituted more than 50% of the total resistance. Among the examined gears, the greatest resistance values were determined for the 600 meshes tailored-traditional Mediterranean type trawl gear. |
| format | Article |
| id | doaj-art-e48a1fb583234ca5837c3e8e4e766075 |
| institution | Kabale University |
| issn | 2602-473X |
| language | English |
| publishDate | 2022-03-01 |
| publisher | Istanbul University Press |
| record_format | Article |
| series | Aquatic Sciences and Engineering |
| spelling | doaj-art-e48a1fb583234ca5837c3e8e4e7660752025-08-20T03:52:52ZengIstanbul University PressAquatic Sciences and Engineering2602-473X2022-03-01372869910.26650/ASE2021999022123456A Theoretical Approach to Determine the Total Resistance on Different Trawl Gears Used in TurkeyOzan Soykan0https://orcid.org/0000-0002-2227-1245Celalettin Aydın1https://orcid.org/0000-0001-8993-6013Ege Üniversitesi, Izmir, TurkiyeEge Üniversitesi, Izmir, TurkiyeThe study aims to theoretically determine the total resistance forces acting on bottom trawls used in the commercial trawl fishery around the Turkish Peninsula. For this purpose, a total of 14 (2 for Black Sea, 2 for Sea of Marmara, 6 for Aegean Sea and 4 Mediterranean Sea) trawl gears were examined during the study representing all types of the bottom trawl fishery (e.g., fish targeted, shrimp targeted and mix) in Turkey. The calculation of the hydrodynamic forces of the gears was based on the determination of each gear component; net, floaters, sweep, door, warp and the friction force caused by footrope, sweep and door. The total resistance of trawl gears was calculated according to different towing speeds and warp lengths. Average resistance values of the examined nets with a 500 m warp length indicated that the frictional force of the trawl door composed more than 41.3% of the total resistance, followed by net (39.4%), both doors (6.3%), footrope friction (6.1%), sweep frictions (3.1%) and the rest belonged to sweeps, warps and floaters (totally 3.8%). It was determined that resistance caused by friction including sweeps, footrope and doors constituted more than 50% of the total resistance. Among the examined gears, the greatest resistance values were determined for the 600 meshes tailored-traditional Mediterranean type trawl gear.https://cdn.istanbul.edu.tr/file/JTA6CLJ8T5/690F7094D4924F0F93E5957D8B40A470bottom trawltotal resistancefrictionhydrodynamic |
| spellingShingle | Ozan Soykan Celalettin Aydın A Theoretical Approach to Determine the Total Resistance on Different Trawl Gears Used in Turkey Aquatic Sciences and Engineering bottom trawl total resistance friction hydrodynamic |
| title | A Theoretical Approach to Determine the Total Resistance on Different Trawl Gears Used in Turkey |
| title_full | A Theoretical Approach to Determine the Total Resistance on Different Trawl Gears Used in Turkey |
| title_fullStr | A Theoretical Approach to Determine the Total Resistance on Different Trawl Gears Used in Turkey |
| title_full_unstemmed | A Theoretical Approach to Determine the Total Resistance on Different Trawl Gears Used in Turkey |
| title_short | A Theoretical Approach to Determine the Total Resistance on Different Trawl Gears Used in Turkey |
| title_sort | theoretical approach to determine the total resistance on different trawl gears used in turkey |
| topic | bottom trawl total resistance friction hydrodynamic |
| url | https://cdn.istanbul.edu.tr/file/JTA6CLJ8T5/690F7094D4924F0F93E5957D8B40A470 |
| work_keys_str_mv | AT ozansoykan atheoreticalapproachtodeterminethetotalresistanceondifferenttrawlgearsusedinturkey AT celalettinaydın atheoreticalapproachtodeterminethetotalresistanceondifferenttrawlgearsusedinturkey AT ozansoykan theoreticalapproachtodeterminethetotalresistanceondifferenttrawlgearsusedinturkey AT celalettinaydın theoreticalapproachtodeterminethetotalresistanceondifferenttrawlgearsusedinturkey |