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Journals / Su Ürünleri Dergisi / 2014 / Cilt: 31 - Sayı: 2

Determining escape mortality of red bandfish (Cepola macrophthalma) escaping from bottom trawl

Dip trolünden kaçan kurdele balığının (Cepola macrophthalma) ölüm oranlarının belirlenmesi

F. Ozan DÜZBASTILAR
Pages
61–68
DOI
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AI Summary & Key Takeaways

AI Insight
⚡ TL;DR(Too Long; Didn't Read)

Water temperature was a significant factor on escape mortality (p<0.001).

📌 3 Key Takeaways

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Objective & Hypothesis:This study was conducted to prove escape mortality of red bandfish (Cepola macrophthalma), which is a discard fish, escaping from different demersal trawl codends.
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Key Findings & Data:Four experiments were performed off the Yassıca Island, İzmir Bay (Aegean Sea, Turkish coast): in two different seasons and for two years (January and September, 2011 and February and September, 2012). 15 min trawl hauls were carried out for capture to sample fish for the test and control cages.
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Conclusion & Impact:Water temperature was a significant factor on escape mortality (p<0.001).
🔬Design:Lab & Field Experiment
📍Scope:2011 Verileri
⚙️Variables:Domain Parameters

Abstract

This study was conducted to prove escape mortality of red bandfish (Cepola macrophthalma), which is a discard fish, escaping from different demersal trawl codends. Four experiments were performed off the Yassıca Island, İzmir Bay (Aegean Sea, Turkish coast): in two different seasons and for two years (January and September, 2011 and February and September, 2012). 15 min trawl hauls were carried out for capture to sample fish for the test and control cages. Red bandfish mortality varied between %18.2 and 88.1 for the test groups. There were significant differences between the mortality of control (open codend) and test cages (40 mm square, 44 and 50 mm diamond mesh codends) (p<0,001). Water temperature was a significant factor on escape mortality (p<0.001).

Özet

Bu çalışma, farklı trol torbalarından kaçan ıskarta tür kurdele balığının (Cepola macrophthalma) ölüm oranlarının belirlenmesi üzerine yürütülmüştür. İki farklı yıl ve mevsimde (Ocak ve Eylül, 2011 and Şubat ve Eylül, 2012), Ege Denizi, İzmir Orta Körfezi'nde bulunan Yassıca Ada civarında yürütülmüştür. Kurdele balığına ait mortalite, deneme grupları için %18,2 ile 88,1 arasında değişmiştir. Ölüm oranları açısından kontrol (açık torba) ve deneme grupları (40 mm kare, 44 mm ve 50 mm baklava torbalar) arasındaki fark önemli bulunmuştur (p<0,001). Su sıcaklığı kaçış mortalitesine etkileyen önemli bir faktör olarak tespit edilmiştir (p<0.001).

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Cite This Article

DÜZBASTILAR, F. O. (2014). Determining escape mortality of red bandfish (Cepola macrophthalma) escaping from bottom trawl. Su Ürünleri Dergisi, Cilt: 31 - Sayı: 2, 61–68. https://ajindex.com/articles/311233

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