SavedAdd your journal

Journals / Marine and Life Sciences / 2026 / Cilt: 4 Sayı: 1

A preliminary study on the estimation of selectivity of Norwegian lobster (Nephrops norvegicus) using morphological characteristics in bottom trawl fishing

Dip trol balıkçılığında Norveç ıstakozunun (Nephrops norvegicus) morfolojik özellikleri kullanılarak seçiciliğinin tahminine ilişkin bir ön çalışma

Celalettin Aydın(EGE ÜNİVERSİTESİ, URLA DENİZCİLİK MESLEK YÜKSEKOKULU)0000-0001-8993-6013
Adnan Tokaç(EGE ÜNİVERSİTESİ, SU ÜRÜNLERİ FAKÜLTESİ, SU ÜRÜNLERİ AVLAMA VE İŞLEME TEKNOLOJİSİ BÖLÜMÜ)0000-0002-2968-7315
Gamze Akpınar(EGE ÜNİVERSİTESİ, URLA DENİZCİLİK MESLEK YÜKSEKOKULU)0000-0002-6876-8601
Pages
46–52
Publication Date
2022-06-30
🏛️Bibliographic metadata and full text access for this article are provided via DergiPark.
DergiPark Record ↗
✨

AI Summary & Key Takeaways

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

As result of the FISHSELECT simulation, it was determines as the best model ships for 133,745; R 2 = 0,810), CS2= 192,324; R 2 = 0,961) ve CS3 (184,590; R 2 = 0,948) As a result of FISHSELECT simulation, for 3 different body sections selected for Norway lobster , ship for CS1 and Flexellips 1 for CS2 and CS3 were determined as the most suitable models, respectively.

📌 3 Key Takeaways

🎯
Objective & Hypothesis:This study includes a preliminary study to predict the possible L 50 selectivity parameter, which can be obtained for different mesh sizes used in bottom trawl fisheries, by using the morphological features of the Norwegian lobster ( Nephrops norvegicus ).
📊
Key Findings & Data:In the study, 20 Norwegian lobsters in various sizes, from the smallest to the largest (18-61 mm carapace length), were used to represent the population as much as possible.
💡
Conclusion & Impact:As result of the FISHSELECT simulation, it was determines as the best model ships for 133,745; R 2 = 0,810), CS2= 192,324; R 2 = 0,961) ve CS3 (184,590; R 2 = 0,948) As a result of FISHSELECT simulation, for 3 different body sections selected for Norway lobster , ship for CS1 and Flexellips 1 for CS2 and CS3 were determined as the most suitable models, respectively.
🔬Design:Modeling & Simulation
📍Scope:Comprehensive Sample
⚙️Variables:Nephrops norveciqus · FISHSELECT · Seçicilik

Abstract

This study includes a preliminary study to predict the possible L 50 selectivity parameter, which can be obtained for different mesh sizes used in bottom trawl fisheries, by using the morphological features of the Norwegian lobster ( Nephrops norvegicus ). The study was carried out in two stages as morphologically based works in the laboratory and then simulation studies in the computer-based. In the study, 20 Norwegian lobsters in various sizes, from the smallest to the largest (18-61 mm carapace length), were used to represent the population as much as possible. In laboratory studies, the carapace lengths and weights of these individuals were measured and the probability of escaping/passing from the mesh templates was tested. The data transmission to FISHSELECT software and also simulation process were done and isobar figures showing the L 50 values of Norway lobster against mesh sizes and mesh openness degrees were produced. As result of the FISHSELECT simulation, it was determines as the best model ships for 133,745; R 2 = 0,810), CS2= 192,324; R 2 = 0,961) ve CS3 (184,590; R 2 = 0,948) As a result of FISHSELECT simulation, for 3 different body sections selected for Norway lobster , ship for CS1 and Flexellips 1 for CS2 and CS3 were determined as the most suitable models, respectively.

Özet

Bu çalışma, Norveç ıstakozunun ( Nephrops norvegicus ) morfolojik özelliklerinden yararlanılarak dip trol balıkçılığında kullanılan farklı torba ağ göz açıklıkları için elde edilebilecek olası L 50 seçicilik parametresinin önceden tahmin edilebilmesine yönelik bir ön çalışmayı kapsamaktadır. Laboratuvarda yapılan morfolojik tespit çalışmaları ve sonrasında bilgisayar ortamında yapılan simülasyon olarak iki aşamalı olarak gerçekleştirilmiştir. Çalışmada populasyonu mümkün olduğunca temsil edebilecek en küçükten en büyüğe kadar farklı boy gruplarındaki (18- 61 mm karapas boyu) 20 adet Norveç ıstakozu kullanılmıştır. Bireylerin karapas boyları ve ağırlıkları tespit edilmiş ve ağ göz kalıplarından kaçma/geçme olasılıkları test edilmiştir. Daha sonra veriler FISHSELECT’e aktarılmış ve simülasyon başlatılmış, türe ait L 50 değeri için ağ göz büyüklüğü ve açıklık derecesine karşı gelen izobar grafiği elde edilmiştir. FISHSELECT simülasyonu sonucunda Norveç ıstakozu için seçilen 3 farklı vücut kesiti için sırasıyla CS1 için ships (133,745; R 2 = 0,810), CS2= 192,324; R 2 = 0,961) ve CS3 (184,590; R 2 = 0,948) için ise Flexelips 1 en uygun model olarak tespit edilmiştir.

🔖

Cite This Article

Aydın, C., Tokaç, A., Akpınar, G. (2022). A preliminary study on the estimation of selectivity of Norwegian lobster (Nephrops norvegicus) using morphological characteristics in bottom trawl fishing. Marine and Life Sciences, Cilt: 4 Sayı: 1, 46–52. https://doi.org/10.51756/marlife.1081958

📄 Full Text PDF Viewer

📄

PDF görüntüleyici hazırlanıyor...

References (31)

  1. Bahamon, N., Sardà, F. & Suuronen, P. (2006). Improvement of trawl selectivity in the NW Mediterranean demersal fishery by using a 40 mm square mesh codend. Fisheries Research, 81(1): 15-25. https://doi.org/10.1016/j.fishres.2006.05.020
  2. Briggs, R. P. (1992). An assessment of nets with a square mesh panel as a whiting conservation tool in the Irish Sea Nephrops fishery. Fisheries Research, 13(2): 133-152. https://doi.org/10.1016/0165-7836(92)90023-M
  3. Campos, A., Fonseca, P. & Erzini, K. (2002). Size selectivity of diamond and square mesh cod ends for rose shrimp (Parapenaeus longirostris) and Norway lobster (Nephrops norvegicus) off the Portuguese south coast. Fisheries Research, 58(3): 281-301. https://doi.org/10.1016/S0165-7836(01)00396-4
  4. FAO. (2014). List of Species for Fishery Statistics Purposes, Nephrops norvegicus (Linnaeus 1758). Retrieved on March 2, 2022 from http://www.fao.org/fishery/species/2647/en.
  5. Frandsen, R. P., Herrmann, B. & Madsen, N. (2010). A simulation-based attempt to quantify the morphological component of size selection of Nephrops norvegicus in trawl codends. Fisheries Research, 101(3): 156-167. https://doi.org/10.1016/j.fishres.2009.09.017
  6. Froglia, C. & Gramitto, M. E. (1981). Summary of biological parameters on the Norway lobster, Nephrops norvegicus (L.) in the Adriatic. FAO Fisheries Reports, 253: 165-178.
  7. Guijarro, B. & Massutí, E. (2006). Selectivity of diamond-and square-mesh codends in the deepwater crustacean trawl fishery off the Balearic Islands (western Mediterranean). ICES Journal of Marine Science, 63(1): 52-67. https://doi.org/10.1016/j.icesjms.2005.08.011
  8. Hall, M. A., Alverson, D. L. & Metuzals, K. I. (2000). By-catch: problems and solutions. Marine Pollution Bulletin, 41(1-6): 204-219. https://doi.org/10.1016/S0025-326X(00)00111-9
  9. Herrmann, B. (2005a). Effect of catch size and shape on the selectivity of diamond mesh cod-ends: I. Model development. Fisheries Research, 71(1): 1-13. https://doi.org/10.1016/j.fishres.2004.08.024
  10. Herrmann, B. (2005b). Effect of catch size and shape on the selectivity of diamond mesh cod-ends: II. Theoretical study of haddock selection. Fisheries Research, 71(1): 15-26. https://doi.org/10.1016/j.fishres.2004.08.021
  11. Herrmann, B., Priour, D. & Krag, L. A. (2006). Theoretical study of the effect of round straps on the selectivity in a diamond mesh cod-end. Fisheries Research, 80(2-3): 148-157. https://doi.org/10.1016/j.fishres.2006.04.018
  12. Herrmann, B. (2008). A user-guide to the FISHSELECT software tool. DTU Aqua. http://dx.doi.org/10.13140/2.1.3055.0086
  13. Herrmann, B., Krag, L. A., Frandsen, R. P., Madsen, N., Lundgren, B. & Stæhr, K. J. (2009). Prediction of selectivity from morphological conditions: methodology and a case study on cod (Gadus morhua). Fisheries Research, 97(1-2): 59-71. https://doi.org/10.1016/j.fishres.2009.01.002
  14. Kaykaç, H., Özbilgin, H. & Tokaç, A. (2009). Effects of mesh configuration on the selectivity of demersal trawl codends for Nephrops norvegicus (Linnaeus, 1758) (Decapoda, Nephrophidae). Crustaceana, 1569-1578. https://doi.org/10.1163/001121609X12487811051705
  15. Kostak E. N. & Tokaç A. (2018). Predicting the size selectivity based on the striped red mullet morphology (Mullus surmuletus) in bottom trawl fisheries. Aquatic Sciences and Engineering, 33(3): 90-95. https://doi.org/10.26650/ASE201817
  16. Lucchetti, A., Virgili, M., Vasapollo, C., Petetta, A., Bargione, G., Veli, D. L. & Sala, A. (2021). An overview of bottom trawl selectivity in the Mediterranean Sea. Mediterranean Marine Science, 22(3): 566-585. https://doi.org/10.12681/mms.26969
  17. Main, J., & Sangster, G. I. (1985). The behaviour of the Norway lobster, Nephrops norvegicus (L.), during frawling. Department of Agriculture and Fisheries for Scotland, 1-23.
  18. Mytilineou, C., Fourtouni, A. & Politou, C. Y. (1998). Trawl selectivity studies on Nephrops norvegicus (L.) in the eastern Mediterranean Sea. Scientia Marina, 62(S1): 107-116. https://doi.org/10.3989/scimar.1998.62s1107
  19. O'Neill, F. G. & Herrmann, B. (2007). PRESEMO-a predictive model of codend selectivity-a tool for fishery managers. ICES Journal of Marine Science, 64(8): 1558-1568. https://doi.org/10.1093/icesjms/fsm101
  20. O’Neill, F. G. & Mutch, K. (2017). Selectivity in trawl fishing gears. Scottish Marine and Freshwater Science, 8(01). https://doi.org/10.4789/1890-1
  21. Robertson, J. H. B. & Ferro, R. S. T. (1991). Selectivity of Nephrops trawls. EEC Study Contract, 9: 1-15.
  22. Sala, A., Lucchetti, A., Piccinetti, C. & Ferretti, M. (2008). Size selection by diamond-and square-mesh codends in multi-species Mediterranean demersal trawl fisheries. Fisheries Research, 93(1-2): 8-21. https://doi.org/10.1016/j.fishres.2008.02.003
  23. Sarda, F. (1998). Nephrops norvegicus (L.): Comparative biology and fishery in the Mediterranean Sea. Introduction, conclusions and recommendations, Scientia Marina, 62(Suppl. 1): 5-15.
  24. Sarda, F., Conan, G. Y. & Fusté, X. (1993). Selectivity of Norway lobster Nephrops norvegicus (L.) in the northwestern Mediterranean, Scientia Marina, 57(2-3): 167-174.
  25. Stergiou, K. I., Petrakis, G. & Politou, C. Y. (1997). Size selectivity of diamond and square mesh cod-ends for Nephrops norvegicus in the Aegean Sea. Fisheries Research, 29(3): 203-209. https://doi.org/10.1016/S0165-7836(96)00542-5
  26. Tokaç, A. (2001). Studies on the improvement of bottom trawl selectivity in Aegean Sea. 5th International Workshop, Methods For The Development and Evaluation of Maritime Technologies, DEMAT ’01, Prooceedings book, 2: 259-274.
  27. Tokaç, A., Lök, A., Kaykaç, M.H., Aydın, C., Ulaş, A., Gökçe, G. & Özbilgin, H. (2012). Morfolojik özellikler kullanılarak trol torba seçiciliğinin önceden tahmini. Tübitak Proje No: 111O492 Sonuç Raporu, İzmir, 48.
  28. Tokaç, A., Herrmann, B., Gökçe, G., Krag, L, A., Nezhad, D.S., Lök, A., Kaykaç M. H., Aydın, C. & Ulaş, A. (2016). Understanding the size selectivity of red mullet (Mullus barbatus) in Mediterranean trawl codends. A study based on fish morphology. Fisheries Research, 174, 81-93. https://doi.org/10.1016/j.fishres.2015.09.
  29. Tokaç, A., Herrmann B., Gökçe G., Krag L. A., Nezhad, D. S., (2018). The Influence of mesh size and shape on the size selection of European hake (Merluccius merluccius) in demersal trawl codends: An investigation based on fish morphology and simulation of mesh geometry. Scientia Marina, 82(3): 147-157. https://doi.org/10.3989/scimar.04764.18A
  30. Tokac, A., Özbilgin, H. & Kaykac, H. (2009). Alternative codend designs to improve size selectivity for Norway lobster (Nephrops norvegicus) and rose shrimp (Parapenaeus longirostris) in the Aegean Sea. Crustaceana, 82(6): 689-702. https://doi.org/10.1163/156854009X407696
  31. Walsh, S. J., Engås, A., Ferro, R., Fonteyne, R. & van Marlen, B. (2002). To catch or conserve more fish: the evolution of fishing technology in fisheries science. ICES Marine Science Symposia, 215: 493-503.