Effect of net twine on efficiency of trammel nets for catching carp (Cyprinus carpio Linnaeus, 1758) in Lake Beyşehir and silver crucian carp (Cyprinus carpio Linnaeus. 1758) in lake Beyşehir and Silver Crucian carp (Carassius gibelio Bloch, 1782) in Lake Eğirdir

Fishing experiments were carried out with four trammel net types from May 1998 to August 1999, to determine the influence of net twine type (monofilament and multifilament) on efficiency of trammel nets for catching carp, Cyprinus carpio Linnaeus, 1758 in Lake Beyşehir and silver crucian carp, Carassius gibelio Bloch, 1782 in Lake Eğirdir. Each net type had four nets with mesh sizes of 56, 80, 100 and 120 mm (stretched mesh of inner walls). Type A nets (monofilament inner wall and outer walls) were more efficient than the other net types (type B, monofilament inner and multifilament outer walls; type C, multifilament inner wall and monofilament outer walls; and type D, multifilament inner wall and outer walls) for capturing carp and silver crucian carp. Effect of monofilament net twine on efficiency of trammel nets was found to be 3.07 and 2.70 times higher than multifilament net twine for capturing carp and silver crucian carp, respectively. Monofilament inner walls of trammel nets were more efficient than multifilament inner walls for both carp and silver crucian carp. However, no significant difference in catching efficiency of monofilament and multifilament outer walls was found.

Anahtar Kelimeler:

Carassius carassius, balık avlama, tuzak ağlar, sazan balığı, balık avlama ekipmanı

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Anonymous. 2004. Denizlerde ve İçsularda Ticari Amaçlı Su Ürünleri Avcılığını Düzenleyen 2004-2006 Av Dönemine Ait 36/1 Numaralı Sirküler. Tarım ve Köyişleri Bakanlığı Koruma ve Kontrol Genel Müdürlüğü, Ankara, 88 pp.

Balık, İ. 1998. Investigation of productivity of multifilament trammel nets, multifilament gill nets and monofilament gill nets that used on fishing pikeperch (Stizostedion lucioperca (L., 1758)) (in Turkish). III. Fisheries Symposium, June 10-12, Erzurum: 645-649.

Balık, İ. 2001. Comparison of seasonal catch per unit efforts for mono and multi-filament trammel nets in Lake Beyşehir. Turkish Journal of Fisheries and Aquatic Sciences, 1: 17-21.

Balık, İ. and Çubuk, H. 2000. Efficiency of capture of tench, Tinea tinea L. by trammel nets of monofilament and multifilament net twine combinations. Fisheries Management and Ecology, 7: 515-521.

Çömlekçi, N. 1988. Deney Tasarımı ve Çözümlemesi. Anadolu Üniversitesi, Eğitim, Sağlık ve Bilimsel Araştırma Çalışmaları Vakfı Yayınları, Ankara, 312 PP

Elbek, A.G., Oktay, E. and Saygı, H. 2002. İstatistik. Ege Üniversitesi Su Ürünleri Fak. Yay. No: 19, Ders Kitabı Dizin No: 6, Ege Üniv. Basımevi, Bornova, İzmir, 304 pp.

Hamley, J.M. 1975. Review of gillnet selectivity. Journal of Fisheries Research Board of Canada, 32: 1943-1969.

Huse, I., L0kkeborg, S. and Soldal, A.V. 2000. Relative selectivity in trawl, longline and gillnet fisheries for cod and haddock. ICES Journal of Marine Science, 57: 1271-1282.

Klust, G. 1982. Netting Materials for Fishing Gear. Second edition, FAO, 175 pp.

Koike, M. and Matuda, K. 1988. Catching efficiency of a trammel net with different vertical slackness and mesh size of inner net. Proceeding World Symposium on Fishing Gear and Fishing Vessel Design, Marine Institute, St. John's Newfoundland, Canada: 468-472

Kuşat M. 1996. Eğirdir Gölü 'ndeki fsudak balığı Stizostedion lucioperca (L., 1758) avcılığında kullanılan multifıîament ve monofilament sade uzatma ağlarının av verimliliği etkileri üzerine araştırmalar. P.h.D. thesis, Izmir: Ege Üniversitesi Fen Bilimleri Enstitüsü.

Machiels, M.A.M., Klinge, M., Lanters, R. and van Densen, W.L.T. 1994. Effect of snood length and hanging ratio efficiency and selectivity of bottom-set gillnets for pikeperch Stizostedion lucioperca L. and bream Abramis brama. Fisheries Research, 9: 231-239.

Njoku, D.C. 1991. Comparative catching efficiency and techno-economics of multifilament and monofilament gillnets on Oguto Lake, Nigeria. Fisheries Research, 12: 23-30.

Steinberg, R. 1964. Monofilament gill nets in fresh water experiments and practice. Modern Fishing Gear of the World, Vol. 2. Fishing News Books Ltd., London: 111-115.

Stewart, P.A.M. 1987. The selectivity of slackly hung cod gillnets constructed from three different types of twine. J. Cons. Int. Explor. Mer., 43: 189-193.

Thomas, S.N., Edwin, L. and George, V.C. 2003. Catching efficiency of gill nets and trammel nets for penaeid prawns. Fisheries Research, 60: 141-150.

Yurtsever, N. 1984. Deneysel İstatistik Metodları. TOKB Genel Yayın No: 1212, Teknik Yayın No: 56, Ankara, 623 pp.