Abstract
In this study, discard rates of the commercial red mullet (Mullus barbatus) gillnets, made from different netting twine; monofilament and multifilament were presented. The nets were set near the shore in which contains sea grasses (Posidonia oceanica) in İzmir Bay. These areas are sensitive habitats. During the fishing trials, totally 32 fish species have been caught, 21 of which were non-marketable. The rates of these non-marketable species are 77.8% and %22.8 for monofilament and multifilament gillnets respectively in number. The Serranidae and Labridae families were dominant in catch composition. The CPUE of the monofilament and multifilament gillnets for weight were calculated as 129.6±5.1 and 36.9±1.3 respectively. As a result, monofilament gillnets were caught more non-marketable species than multifilament gillnets (P<0.05; z=0.007). Because of the high rate of discard species, it's not advisable to use monofilament gillnets near the shore, in which contains sensitive habitats.
References
- Akyol, O. 2003. Retained and trash Şsh catches of beach- seining in the Aegean Coast of Turkey. Turkish J. of Veterinary and Animal Sci., 27: 1111-1117.
- Akyol, 0. and Kara, A. 2003. An investigation on the determination of catch compositions of the bottom trawling and beach-seining in the Bay of Izmir Aegean Sea, E.Ü. J. of Fisheries and Aquatic Sci., 20(3—4): 321-328
- Alverson, D.L., Freeber, M.H., Murawski, S. and Pope, J.P. 1994. A Global Assesment of Fisheries Bycatch and Discards. FAO Fish. Tech. Pap. No. 339. FAO, Rome, 223 pp.
- Andrew, N.L., Jones, T., Terry, C. and Pratt, R. 1995. By- catch form an Australian stow net Şshery for school prawns (Metapenaeus macleayi). Fisheries Research, 22: 119-136.
- Anonymous. 1999. Fisheries regulation for marine and fresh waters for commercial Şshery, 1999-2000 fishing period No.:33\1, Ministry of Agriculture and Rural Affair of Turkey, Protect and Control General OfŞce, Ankara, 71 pp. (in Turkish).
- Aydın, C., Kaykaç, H. and Tokaç, A. 2004 Application of double grid systems in Turkish traditional trawl Şsheries. E.Ü. J. of Fisheries and Aquatic Sci., 22(1- 2): 43-48.
- Aydın, C. and Tosunoğlu, Z. 2004. Sorting grids in trawl. E.Ü. J. of Fisheries and Aquatic Sci., 23:(1-2): 235- 238.
- Aydın, İ., Gökçe, G. and Metin, C. 2006. The effects of monofiament and multiflament PA netting twine on catch composition of the red mullet gillnets. E.Ü. J. of Fisheries and Aquatic Sci., 23:(3-4): 285-289.
- Aydın, İ. and Metin, C. 2008. Effects of time of the day on catch composition in monoŞlament and multiŞlament gillnets Şshing. Journal of Fisheries Sciences.com, 2: 608-615 (in Turkish).
- Dutt, S. 1965. An interpretation of the data from the effect of mesh size on the Şshing efŞciency of sardine gillnets. Fishing Technology, 11(2): 249-250.
- Fabi, G., Sbarana, M., Biogi, F., Grati, F., Leonori, I. and Saıtor, P. 2002. Trammel net and gillnet selectivity for Lithognatus mormyrus (L., 1758), and Mullus barbatus (L., 1758) in the Adriatic and Lingurian seas. Fisheries Research, 54: 375-388.
- Godoy, H., Furevik, D. and Lokkeborg, S. 2003. Reduced bycatch of red king crab (Paralithodes camtschatı'cus) in the gillnet Şshery for cod (Gadus morhua) in northern Norway. Fisheries Research, 62: 377-3 84.
- Gökçe, G. 2004. Research on reduction of non-target species in shrimp trammel net. PhD. thesis, Izmir: Ege University. (in Turkish).
- Gökçe, G. and Metin, C. 2007. Landed and discarded catches from commercial prawn trammel net Şshery. Journal of Applied Ichthyology, 23: 543-546.
- Kelleher, K. 2005. Discards in the world’s marine Şsheries. FAO Fisheries Technical Paper, Rome, 470 pp.
- Kınacıgil, H.T., Çıra, E. and İlkyaz, A. 1999. By-catch problems in Şsheries and preliminary study. E.Ü. J. of Fisheries and Aquatic Sci., 16(3-4): 437-444.
- Metin, C., Lök, A. and İlkyaz, A.T. 1998. The selectivity of gill net in different mesh size for Dı'plodus annuları's (L., 1758) and Spicara şexuosa (RaŞnesque, 1810). E.Ü. J. of Fisheries and Aquatic Sci., 15(3-4): 293- 303.
Abstract
In this study, discard rates of the commercial red mullet (Mullus barbatus) gillnets, made from different netting twine; monofilament and multifilament were presented. The nets were set near the shore in which contains sea grasses (Posidonia oceanica) in İzmir Bay. These areas are sensitive habitats. During the fishing trials, totally 32 fish species have been caught, 21 of which were non-marketable. The rates of these non-marketable species are 77.8% and %22.8 for monofilament and multifilament gillnets respectively in number. The Serranidae and Labridae families were dominant in catch composition. The CPUE of the monofilament and multifilament gillnets for weight were calculated as 129.6±5.1 and 36.9±1.3 respectively. As a result, monofilament gillnets were caught more non-marketable species than multifilament gillnets (P<0.05; z=0.007). Because of the high rate of discard species, it's not advisable to use monofilament gillnets near the shore, in which contains sensitive habitats.
References
- Akyol, O. 2003. Retained and trash Şsh catches of beach- seining in the Aegean Coast of Turkey. Turkish J. of Veterinary and Animal Sci., 27: 1111-1117.
- Akyol, 0. and Kara, A. 2003. An investigation on the determination of catch compositions of the bottom trawling and beach-seining in the Bay of Izmir Aegean Sea, E.Ü. J. of Fisheries and Aquatic Sci., 20(3—4): 321-328
- Alverson, D.L., Freeber, M.H., Murawski, S. and Pope, J.P. 1994. A Global Assesment of Fisheries Bycatch and Discards. FAO Fish. Tech. Pap. No. 339. FAO, Rome, 223 pp.
- Andrew, N.L., Jones, T., Terry, C. and Pratt, R. 1995. By- catch form an Australian stow net Şshery for school prawns (Metapenaeus macleayi). Fisheries Research, 22: 119-136.
- Anonymous. 1999. Fisheries regulation for marine and fresh waters for commercial Şshery, 1999-2000 fishing period No.:33\1, Ministry of Agriculture and Rural Affair of Turkey, Protect and Control General OfŞce, Ankara, 71 pp. (in Turkish).
- Aydın, C., Kaykaç, H. and Tokaç, A. 2004 Application of double grid systems in Turkish traditional trawl Şsheries. E.Ü. J. of Fisheries and Aquatic Sci., 22(1- 2): 43-48.
- Aydın, C. and Tosunoğlu, Z. 2004. Sorting grids in trawl. E.Ü. J. of Fisheries and Aquatic Sci., 23:(1-2): 235- 238.
- Aydın, İ., Gökçe, G. and Metin, C. 2006. The effects of monofiament and multiflament PA netting twine on catch composition of the red mullet gillnets. E.Ü. J. of Fisheries and Aquatic Sci., 23:(3-4): 285-289.
- Aydın, İ. and Metin, C. 2008. Effects of time of the day on catch composition in monoŞlament and multiŞlament gillnets Şshing. Journal of Fisheries Sciences.com, 2: 608-615 (in Turkish).
- Dutt, S. 1965. An interpretation of the data from the effect of mesh size on the Şshing efŞciency of sardine gillnets. Fishing Technology, 11(2): 249-250.
- Fabi, G., Sbarana, M., Biogi, F., Grati, F., Leonori, I. and Saıtor, P. 2002. Trammel net and gillnet selectivity for Lithognatus mormyrus (L., 1758), and Mullus barbatus (L., 1758) in the Adriatic and Lingurian seas. Fisheries Research, 54: 375-388.
- Godoy, H., Furevik, D. and Lokkeborg, S. 2003. Reduced bycatch of red king crab (Paralithodes camtschatı'cus) in the gillnet Şshery for cod (Gadus morhua) in northern Norway. Fisheries Research, 62: 377-3 84.
- Gökçe, G. 2004. Research on reduction of non-target species in shrimp trammel net. PhD. thesis, Izmir: Ege University. (in Turkish).
- Gökçe, G. and Metin, C. 2007. Landed and discarded catches from commercial prawn trammel net Şshery. Journal of Applied Ichthyology, 23: 543-546.
- Kelleher, K. 2005. Discards in the world’s marine Şsheries. FAO Fisheries Technical Paper, Rome, 470 pp.
- Kınacıgil, H.T., Çıra, E. and İlkyaz, A. 1999. By-catch problems in Şsheries and preliminary study. E.Ü. J. of Fisheries and Aquatic Sci., 16(3-4): 437-444.
- Metin, C., Lök, A. and İlkyaz, A.T. 1998. The selectivity of gill net in different mesh size for Dı'plodus annuları's (L., 1758) and Spicara şexuosa (RaŞnesque, 1810). E.Ü. J. of Fisheries and Aquatic Sci., 15(3-4): 293- 303.
Details
| Primary Language | Turkish |
|---|---|
| Journal Section | Articles |
| Authors | |
| Publication Date | April 1, 2008 |
| Published in Issue | Year 2008 Volume: 8 Issue: 2 |