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REPORT on SWORDFISH in TURKISH WATERS in 1999-2000* Işık K

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REPORT on SWORDFISH in TURKISH WATERS in 1999-2000* Işık K SCRS/00/128 REPORT ON SWORDFISH IN TURKISH WATERS IN 1999-2000* Işık K. ORAY** and Zahit Tuğrul ALIÇLI** 1. CATCHİNG GROUNDS In Turkish waters swordfish are mainly caught in the Mediterranean Sea (Gulf of Antalya) in the Northern Aegean Sea (in Gökçeada), Gulf of Saroz and , in the Bay of Edremit and in the Southern Aegean Sea (in the Gulf of Fethiye). 2. CATCHİNG TECHNOLOGY İN THE CATCHİNG GROUNDS a) In the Northern Aegean Sea with Harpoones and Drift nets. b) In the Southern Aegean Sea with Drift nets and Longlines. c) In the Mediterranean Sea with Longlines. 3. PERİODS OF CATCH a) In the Northern Aegean Sea : In this area; the catch period varies of central varies according to the methods of catch. In May as the water gets warmer catch with harpoons begins. Depending on the water temperature, the catch with harpoons goes on till the middle or the end of June. South of this area in the Bay of Edremit, swordfish are only caught by driftnets. The number of boats including the boats coming also from the Sea of Marmara reaches 100-150. b) In the Southern Aegean Sea : In this area mainly drift nets are used. The catch periods begins in September and goes on till the end of October. The catch in this area is carried by means of longlines by fishermen who come from the Gulf of Antalya. The catch period could countinue till September-End of October. The number of boats varies. c) In the Mediterranean Sea : Catch by longlines begins June and goes on depending on till August-September. The total number of the boats involved in the catch is maximal 50. The catch in the above mentioned regions depends on the weather conditions, the amount of fish and the financial situation of the fishermen. The length of the boats in the above three areas are around in 9- 10m. (multi purpose). The boats are made of wood and other materials. 4. CATCH RESTRİCTİONS a) Time restrictions : In the 2000; the catch restrictions of the Ministry of the Agriculture and Rural Affairs is; In all Turkish waters between 15 June – 1 August. b) Restriction of length; 120cm fork length. In 1999 113 tons of swordfish were caught in Turkish Seas. The length distribution of 111 samples in 1999 is shown in table 1 and figure 1. * This work was supported by the Research Fund of the University of İstanbul. Project number B- 690/10082000. ** University of Istanbul, Faculty of Aquatic Products. Department of Fish Catching Technology. Ordu cad. no: 200 34470 Laleli - İstanbul / TURKEY. Table 1. Length distribution of the samples in 1999. FL f FL % 60-64,9 0 60 0 65-69,9 1 65 0,900901 70-74,9 7 70 6,306306 75-79,9 7 75 6,306306 80-84,9 13 80 11,71171 85-89,9 10 85 9,009009 90-94,9 1 90 0,900901 95-99,9 3 95 2,702703 100-104,9 0 100 0 105-109,9 1 105 0,900901 110-114,9 9 110 8,108108 115-119,9 2 115 1,801802 120-124,9 5 120 4,504505 125-129,9 5 125 4,504505 130-134,9 4 130 3,603604 135-139,9 5 135 4,504505 140-144,9 4 140 3,603604 145-149,9 9 145 8,108108 150-154,9 4 150 3,603604 155-159,9 5 155 4,504505 160-164,9 1 160 0,900901 165-169,9 1 165 0,900901 170-174,9 3 170 2,702703 175-179,9 5 175 4,504505 180-184,9 2 180 1,801802 185-189,9 1 185 0,900901 190-194,9 1 190 0,900901 195-199,9 1 195 0,900901 200-204,9 1 200 0,900901 205-209,9 0 205 0 n= 111 1999 % FL Distribution 14 12 n = 111 10 8 6 % percentage 4 2 0 60 70 80 90 100 110 120 130 140 150 160 170 180 190 200 FORK LENGTH Figure 1. Length distribution of the samples in 1999. .
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