Mehmet CİLBİZ, Rahmi UYSAL, Abdulkadir YAĞCI, Süleyman Oğuz KORKUT, Kadir ÇAPKIN, Mehmet CESUR

CPUE comparison of traditional crayfish fyke net rigged with knotted net and alternatively knotless net

In this study, it is aimed to compare the yield and strength of the crayfish fyke rigged with knotless net with 210d/12 rope thickness with those of the traditional net material rigged with 210d/6 knotted net which is widely used in Turkey in fishing crayfish (Pontastacus leptodactylus, Eschscholtz, 1823). The study was carried out on a monthly basis between June 2017 and May 2018. In the study, a total of 300 fyke nets, equipped with 150 classical and 150 alternative nets, were used. The caught crayfishes were measured and weighted according to the fyke net they were caught in. A total of 3509 crayfish were caught, 1465 of which were caught with alternative fyke net and 2044 with traditional fyke net. Average CPUE value ranged from 10.93 (g/fyke net/day) to 281.14 (g/fyke net/day) for per fishing operation. Average CPUE value of the traditional gear was found to be 98.34 (g/fyke net/day) , while that of the alternative gear was determined as 79.46 (g/fyke net/day), and no statistically significant difference was found between average CPUE values (p>0.05). Average strength value of the traditional fyke net was determined as (± SE) 10.43 ± 0.27 kg, while that value in 210d / 12 knotless net was identified as 14.50 ± 0.91 kg (p

Düğümlü ağdan donanmış geleneksel kerevit pinteri ile alternatif olarak düğümsüz ağdan donanmış pinterlerin CPUE karşılaştırması

Bu çalışmada, Türkiye’de kerevit (Pontastacus leptodactylus, Eschscholtz, 1823) avcılığında kullanılmakta olan 210d/6 numara düğümlü ağdan donanmış geleneksel ağ materyali yerine, 210d//12 numara ip kalınlığındaki düğümsüz ağdan donanmış olan kerevit pinterinin verim ve mukavemetinin karşılaştırılması amaçlanmıştır. Çalışma Haziran 2017 ile Mayıs 2018 döneminde aylık olarak yürütülmüştür. Çalışmada 150 adet klasik, 150 adette alternatif ağdan donanmış olan toplam 300 adet pinter kullanılmıştır. Avlanan kerevitler, avlandıkları pinterlere göre ayrılmış ağırlık ve boy ölçümleri yapılmıştır. 1465’i alternatif pinter, 2044’ü de geleneksel pinter ile avlanmış toplam 3509 adet kerevit yakalanmıştır. Operasyon başına ortalama CPUE değeri 10,93 (g/pinter/gün) ile 281,14 (g/pinter/gün) arasında değişim göstermiştir. Geleneksel takımın ortalama CPUE değeri 98,34 (g/pinter/gün) bulunmuş iken alternatif takımınki ise 79,46 (g/pinter/gün) olarak bulunmuş olup; ortalama CPUE değerleri arasında istatistiki farklılık bulunmamıştır (p>0.05). Geleneksel pinter ağının kopma direnci değeri ortalama (±SE) 10,43±0,27 kg; 210d/12 düğümsüz ağın ki ise 14,50±0,91 kg olarak belirlenmiştir (p

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