Journals / Turkish Journal of Fisheries and Aquatic Sciences / 2014 / Cilt: 14 - Sayı: 2

Güney Karadeniz de derinlik, mevsim ve ağ göz açıklığının mezgit ( merlangius merlangus euxinus) solungaç ağı avcılığında av ve ıskarta üzerine etkisi

Effects of depth, season and mesh size on the catch and discards of whiting ( merlangius merlangus euxinus) gillnet fishery in the southern black sea, Turkey

Pages
449–456
DOI
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AI Summary & Key Takeaways

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

These results on the discard information in gillnet fishery can contribute to the literature on ecosystem -based sustainable fisheries management by highlighting relevant results on the protection of species and ecosystem.

📌 3 Key Takeaways

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Objective & Hypothesis:In this study, factors (depth, season and mesh size) influencing the catch and discards of whiting ( Merlangius merlangus euxinus ) gillnet fishery on the Black Sea coasts of Turkey were investigated.
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Key Findings & Data:A total of 19 species were identified and the target species, whiting (Merlangius merlangus euxinus ), dominated 87.56% of the total catch and followed by red mullet (Mullus barbatus ) with 6.32%.
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Conclusion & Impact:These results on the discard information in gillnet fishery can contribute to the literature on ecosystem -based sustainable fisheries management by highlighting relevant results on the protection of species and ecosystem.
🔬Design:Research Article
📍Scope:Comprehensive Sample
⚙️Variables:Domain Parameters

Abstract

In this study, factors (depth, season and mesh size) influencing the catch and discards of whiting ( Merlangius merlangus euxinus ) gillnet fishery on the Black Sea coasts of Turkey were investigated. A total of 19 species were identified and the target species, whiting (Merlangius merlangus euxinus ), dominated 87.56% of the total catch and followed by red mullet (Mullus barbatus ) with 6.32%. While 82.02% of the total catch had commercial value, 17.98% was discarded. The percentage of th e discarded red mullet and whiting under MLS (<13 cm) were found to be 16.03% and 13.27%, respectively. The highest discard amount was observed in winter and the lowest one in summer. The discard rate was highest in the 55 -74 m depth group and the 32 mm me sh size. One -way analysis of similarity (ANOSIM) showed that there were significant differences in the discard species compositions between spring and summer, as well as 32 and 40 mm, 32 and 44 mm mesh sizes (P<0.05). These results on the discard information in gillnet fishery can contribute to the literature on ecosystem -based sustainable fisheries management by highlighting relevant results on the protection of species and ecosystem.

Özet

Bu çalışmada Türkiyenin Karadeniz kıyılarında mezgit (Merlangius merla ngus euxinus) solungaç ağı avcılığında, av ve ıskartayı etkileyen faktörler (derinlik, mevsim ve ağ göz açıklığı) incelenmiştir. Toplam 19 tür tanımlanmış ve hedef tür olan mezgit (Merlangius merla ngus euxinus) %87,56lık oranla toplam avın büyük bir kısmını oluşturmuş ve onu %6,32 ile barbunya (Mullus barbatus ) izlemiştir. Toplam av miktarının %82,02si ticari değer taşırken, %17,98inin ise ıskarta olduğu belirlenmiştir. Asgari avlanabilir boy olan 13 cm altında bulunan ve ıskarta edilen barbunya ve mezgit av miktarları sırasıyla %16,03 ve %13,27 olarak bulunmuştur. En y üksek ıskarta miktarının kış mevsiminde, en düşük ıskarta miktarının ise yaz mevsiminde olduğu görülmüştür. 55 -74 m derinlik grubunda ve 32 mm göz açıklığına sahip ağda ıskarta oranının en yüksek olduğu bulunmuştur. One -way analysis of similarity (ANOSIM) e göre ilkbahar ve yaz mevsimleri arasında, 32 -40, 32 -44 mm göz açıklıklarına sahip ağların ıskarta tür kompozisyonları arasındaki farklılıkların önemli olduğu belirlenmiştir (P<0 ,05). Solungaç uzatma ağları balıkçılığında türleri ve ekosistemi korumak için ıskarta ile ilgili bu bilgilerin kullanılması, ekosisteme dayalı sürdürülebilir balıkçılık yönetimine katkı sağlayabilir .

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Cite This Article

KALAYCI, F., YEŞİLÇİÇEK, T. (2014). Güney Karadeniz de derinlik, mevsim ve ağ göz açıklığının mezgit ( merlangius merlangus euxinus) solungaç ağı avcılığında av ve ıskarta üzerine etkisi. Turkish Journal of Fisheries and Aquatic Sciences, Cilt: 14 - Sayı: 2, 449–456. https://ajindex.com/articles/408349

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References (1)

  1. Aksu, H. 2006. The effects of using sard on in trammel nets on prevent catching of discarded species. MSc thesis. Sinop: Ondokuz Mayıs University. Akyol, O. 2008. Fish by -catch species from coastal small- scale shrimp trammel net fishery in the Aegean Sea (Izmir Bay, Turkey). Journal of Applied Ic hthyology, 24: 339 –341. Alverson, D.L., Freeberg, M.H., Murawski, S.A. and Pope, J.G. 1994. A global assessment of fisheries bycatch and discards. FAO Fisheries, Technical Paper, 339, Rome, 233 pp. Aydin, I., Gökçe, G., Metin, C. 2008. The effects of netting twine on discard rates of commercial red mullet gillnets in Izmir Bay. Turkish Journal of Fisheries and Aquatic Sciences 8: 373 -376. Bettoli, P.W. and Scholten, G.D. 2006. Bycatch rates and initial mortality of paddlefish in a commercial gillnet fishery. Fisheries Research, 77: 343 -347. doi:10.1016/j.fishres.2005.11.008 Clarke, K.R. and Warwick, R.M. 2001. Changes in marine communities: an approach to statistical analysis and interpretation. 2nd edition, PRIMER‐E: Plymouth, Natural Environmental Research Council, 144 pp. Davies, R.W.D., Cripps, S.J., Nickson, A. and Porter, G. 2009. Defining and estimating global marine fisheries bycatch. Marine Policy, 33: 661 -672. doi:10.1016/j.marpol.2009.01.003. Godøy, H., Furevik, D. and Lokkeborg, S. 2003. Reduced bycatch of red king crab (Paralithodes camtschaticus) in the gillnet fishery for cod (Gadus morhua ) in northern Norway. Fisheries Research, 62: 5, 377 -384. Gökce, G. and Metin, C. 2007. Landed and discarded catch es from commercial prawn trammel net fishery. Journal of Applied Ichthyology, 23: 543 –546. doi:10.1111/j.1439 -0426.2007.00832.x. Gray, C.A., Johnson, D.D., Young, D.J. and Broadhurst, M.K. 2004. Discard from the commercial gillnet fishery for dusky flathead, Platycephalus fuscus, in New South Wales. Australia: spatial variability and initial effects of change in minimum legal length of target species. Fisheries Management and Ecology, 11:5, 323 -333. doi: 10.1111/j.1365 - 2400.2004.00385.x. Gray, C.A., Johnson, D.D., Broadhurst, M.K. and Young, D.J. 2005. Seasonal, spatial and gear-related influences on relationships between retained and discarded catches in a multi-species gillnet fishery. Fisheries Research, 75: 56 -72. doi:10.1016/j.fishres.2005.04.014. Hammer, Ø., Harper, D.A.T. and Ryan, P.D. 2001. PAST: Paleontological statistics software package for education and data analysis. Palaeontologia Electronica, 4: 1 –9. Kelleher, K. 2005