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Bycatch Reduction in Trammel Net Fishery for Prawn (Melicertus kerathurus) by Using Guarding Net in İzmir Bay on Aegean Coast of Turkey

Yıl 2009, Cilt: 9 Sayı: 2, - , 01.04.2009

Öz

In this study, by-catch reduction in trammel nets used for prawn fishery in İzmir Bay was studied between May and October 2003. In shrimp trammel net fishery catching of discard species is an important problem due to a series of reasons such as disentangle species causes extra work for fishermen and decreases the labour life of nets. A Guarding net was attached to lead line of traditional shrimp trammel net as a modification to minimize this problem. Control Nets (CNet), originated from traditional commercial nets, and were compared against two groups of Experimental nets (Exp1 and Exp2) in two periods. In the first period of the study Exp1 net group caught 36.46% fewer shrimp (Melicertus kerathurus) in comparison to CNet. In addition to this, 35.62% crab (Goneplax rhomboides), 40.71% mantis shrimp (Squila mantis) and 44.77% purple dye murex (Bolinus brandaris) were caught fewer than those in CNet net group. In the second period of the study Exp2 net group were put into the trial. In this period, Exp1 net group compared with CNet net group caught less shrimp (8.09%), crab (66.15%), mantis shrimp (26.79%) and purple dye murex (32.25%). Exp2 net group caught fewer shrimp (0.99%), crab (50.63%), mantis shrimp (17.33%) and purple dye murex (25.92%) than CNet net group. This study indicates that the net modification was capable of reducing bycatch. Raising of trammel net above the lead line from muddy ground prevent discarding of demersal species from net. Therefore the height of guarding net is an important criterion for bycatch reduction.

Bycatch Reduction in Trammel Net Fishery for Prawn (Melicertus kerathurus) by Using Guarding Net in İzmir Bay on Aegean Coast of Turkey

Yıl 2009, Cilt: 9 Sayı: 2, - , 01.04.2009

Öz

In this study, by-catch reduction in trammel nets used for prawn fishery in İzmir Bay was studied between May and October 2003. In shrimp trammel net fishery catching of discard species is an important problem due to a series of reasons such as disentangle species causes extra work for fishermen and decreases the labour life of nets. A Guarding net was attached to lead line of traditional shrimp trammel net as a modification to minimize this problem. Control Nets (CNet), originated from traditional commercial nets, and were compared against two groups of Experimental nets (Exp1 and Exp2) in two periods. In the first period of the study Exp1 net group caught 36.46% fewer shrimp (Melicertus kerathurus) in comparison to CNet. In addition to this, 35.62% crab (Goneplax rhomboides), 40.71% mantis shrimp (Squila mantis) and 44.77% purple dye murex (Bolinus brandaris) were caught fewer than those in CNet net group. In the second period of the study Exp2 net group were put into the trial. In this period, Exp1 net group compared with CNet net group caught less shrimp (8.09%), crab (66.15%), mantis shrimp (26.79%) and purple dye murex (32.25%). Exp2 net group caught fewer shrimp (0.99%), crab (50.63%), mantis shrimp (17.33%) and purple dye murex (25.92%) than CNet net group. This study indicates that the net modification was capable of reducing bycatch. Raising of trammel net above the lead line from muddy ground prevent discarding of demersal species from net. Therefore the height of guarding net is an important criterion for bycatch reduction.

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Ayrıntılar

Birincil Dil Türkçe
Bölüm Makaleler
Yazarlar

Cengiz Metin Bu kişi benim

Gökhan Gökçe Bu kişi benim

İlker Aydın Bu kişi benim

İsa Bayramiç Bu kişi benim

Yayımlanma Tarihi 1 Nisan 2009
Yayımlandığı Sayı Yıl 2009 Cilt: 9 Sayı: 2

Kaynak Göster

APA Metin, C., Gökçe, G., Aydın, İ., Bayramiç, İ. (2009). Bycatch Reduction in Trammel Net Fishery for Prawn (Melicertus kerathurus) by Using Guarding Net in İzmir Bay on Aegean Coast of Turkey. Turkish Journal of Fisheries and Aquatic Sciences, 9(2).
AMA Metin C, Gökçe G, Aydın İ, Bayramiç İ. Bycatch Reduction in Trammel Net Fishery for Prawn (Melicertus kerathurus) by Using Guarding Net in İzmir Bay on Aegean Coast of Turkey. Turkish Journal of Fisheries and Aquatic Sciences. Nisan 2009;9(2).
Chicago Metin, Cengiz, Gökhan Gökçe, İlker Aydın, ve İsa Bayramiç. “Bycatch Reduction in Trammel Net Fishery for Prawn (Melicertus Kerathurus) by Using Guarding Net in İzmir Bay on Aegean Coast of Turkey”. Turkish Journal of Fisheries and Aquatic Sciences 9, sy. 2 (Nisan 2009).
EndNote Metin C, Gökçe G, Aydın İ, Bayramiç İ (01 Nisan 2009) Bycatch Reduction in Trammel Net Fishery for Prawn (Melicertus kerathurus) by Using Guarding Net in İzmir Bay on Aegean Coast of Turkey. Turkish Journal of Fisheries and Aquatic Sciences 9 2
IEEE C. Metin, G. Gökçe, İ. Aydın, ve İ. Bayramiç, “Bycatch Reduction in Trammel Net Fishery for Prawn (Melicertus kerathurus) by Using Guarding Net in İzmir Bay on Aegean Coast of Turkey”, Turkish Journal of Fisheries and Aquatic Sciences, c. 9, sy. 2, 2009.
ISNAD Metin, Cengiz vd. “Bycatch Reduction in Trammel Net Fishery for Prawn (Melicertus Kerathurus) by Using Guarding Net in İzmir Bay on Aegean Coast of Turkey”. Turkish Journal of Fisheries and Aquatic Sciences 9/2 (Nisan 2009).
JAMA Metin C, Gökçe G, Aydın İ, Bayramiç İ. Bycatch Reduction in Trammel Net Fishery for Prawn (Melicertus kerathurus) by Using Guarding Net in İzmir Bay on Aegean Coast of Turkey. Turkish Journal of Fisheries and Aquatic Sciences. 2009;9.
MLA Metin, Cengiz vd. “Bycatch Reduction in Trammel Net Fishery for Prawn (Melicertus Kerathurus) by Using Guarding Net in İzmir Bay on Aegean Coast of Turkey”. Turkish Journal of Fisheries and Aquatic Sciences, c. 9, sy. 2, 2009.
Vancouver Metin C, Gökçe G, Aydın İ, Bayramiç İ. Bycatch Reduction in Trammel Net Fishery for Prawn (Melicertus kerathurus) by Using Guarding Net in İzmir Bay on Aegean Coast of Turkey. Turkish Journal of Fisheries and Aquatic Sciences. 2009;9(2).