Farklı avlak sahalarında mono-multi ve multi filament fanyalı uzatma ağlarının av verimliliği
Küçük Resim Yok
Tarih
2005
Yazarlar
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Erişim Hakkı
info:eu-repo/semantics/openAccess
Özet
Önceki çalışmalarda mono filament galsama ağlarının multi filament galsama ağlara göre daha verimli olduğunu bildirilmektedir. Mono-multi filament ile multi filament fanyalı uzatma ağları arasındaki ilişki hakkında yeterli bilgi yoktur. Bu nedenle; çalışmada farklı ağ göz genişliğine ve materyallere sahip mono-multi ve multifilament uzatma ağlarının av verimleri üzerindeki etkisi incelenmiştir. Çalışma İzmir Körfezi, Urla İskele'de aktif balıkçılık yapılan saha ile Muğla ili, Kazıklı Koyu'nda balık yetiştiriciliği yapılan kafesler çevresinde yürütülmüştür. Araştırmada, mono-multi ve multi filament 28, 30, 32 mm tor göz genişliğine sahip fanyalı uzatma ağları kullanılmıştır. Saha çalışmalarında, sırasıyla; 28, 30, 32 mm tor göz genişliğine sahip fanyalı uzatma ağları birbiri ardına bağlanarak dönek yöntemi uygulanmıştır. Avlanan biyomas ağ ve göz genişliği kriterleri dikkate alınarak ayrılmıştır. Herbir ağda yakalanan türlerin biyometrik ölçümleri yapılmıştır. Mono-multi ve multi filament ağların çalışma sahaları farkı gözetmeksizin elde edilen av verimlerinin (61 Kg) birbirlerine eşit olduğu bulunmuştur. Av sahalarındaki av verimleri dikkate alındığında akuakültür sahasında yapılan avcılık %24 daha verimlidir. Aktif avcılık yapılan sahalardaki av veriminin, akuakültür alanlarındaki av verimine göre daha düşük değerde olduğu tespit edilmiştir. Balıkçılık alanındaki mono-multi filament uzatma ağlarının verimi multi filament ağların verimine göre %28 daha düşük ve akakültür alanındaki veriminin %17 daha yüksek bulunmuştur. Göz genişliğine göre; 28 mm ağ göz genişliğine sahip ağların diğer ağlardan daha verimli bulunmuştur. Çalışmada 32 tür yakalanmış olup, en fazla avlanan tür isparoz balığı (Diplodus annularis) %53 oranına sahiptir. Avlanma sahaları mono-multi ve multi filament fanyalı uzatma ağlarının av verimi üzerinde etkili olduğu bulunmuştur.
The previous researches have been stated that monofilament gill nets are more efficient than multifilament trammel nets. There hasn't enough knowledge on catch efficiency between mono-multifilament and multifilament trammel nets. In this case; it was examined effects on the catch efficiency of the mono-multi and multi filament trammel nets which had different mesh size and net materials. This study was carried out in active fishing ground where was Urla iskele in the Izmir Bay and in aquaculture grounds where was in Kazıklı Bay. It was used mono-multi and multifilament trammel nets having 28,30 and 32 mm bar mesh size in this study. It was applied passive fixed methods with trammel nets having 28, 30 and 32 mm bar mesh size which was connected in turn in order one after the other. The biomass was seperated taken into consideration mesh size and net. It was measured caught each species which had biometric mesurements. It was found that catchs of mono-multi and multifilament trammel nets was almost equal unless it took care of fishing grounds. It was more productive, (24%) in aquaculture ground than fishing ground taken consideration different fishing grounds. It was determined Fishing efficiency of fishing ground was low according to aquaculture ground. I was found out that catchs of mono-multifilament trammel nets in the active fishing ground according was lower (28%) and higher (17%) than aquaculture grounds. Accounding to mesh size; it was found that catches of 28 mm bar mesh size nets was more effective than others. It was caught 32 species, ratio of annular sea bream (Diplodus vulgaris L, 1758) as the most caught species had 53%. It was found that fishing ground was effective on catches of the mono-multi and multifilament trammel nets.
The previous researches have been stated that monofilament gill nets are more efficient than multifilament trammel nets. There hasn't enough knowledge on catch efficiency between mono-multifilament and multifilament trammel nets. In this case; it was examined effects on the catch efficiency of the mono-multi and multi filament trammel nets which had different mesh size and net materials. This study was carried out in active fishing ground where was Urla iskele in the Izmir Bay and in aquaculture grounds where was in Kazıklı Bay. It was used mono-multi and multifilament trammel nets having 28,30 and 32 mm bar mesh size in this study. It was applied passive fixed methods with trammel nets having 28, 30 and 32 mm bar mesh size which was connected in turn in order one after the other. The biomass was seperated taken into consideration mesh size and net. It was measured caught each species which had biometric mesurements. It was found that catchs of mono-multi and multifilament trammel nets was almost equal unless it took care of fishing grounds. It was more productive, (24%) in aquaculture ground than fishing ground taken consideration different fishing grounds. It was determined Fishing efficiency of fishing ground was low according to aquaculture ground. I was found out that catchs of mono-multifilament trammel nets in the active fishing ground according was lower (28%) and higher (17%) than aquaculture grounds. Accounding to mesh size; it was found that catches of 28 mm bar mesh size nets was more effective than others. It was caught 32 species, ratio of annular sea bream (Diplodus vulgaris L, 1758) as the most caught species had 53%. It was found that fishing ground was effective on catches of the mono-multi and multifilament trammel nets.
Açıklama
Anahtar Kelimeler
Zooloji, Balıkçılık
Kaynak
Su Ürünleri Dergisi
WoS Q Değeri
Scopus Q Değeri
Cilt
22
Sayı
1-2
