Comparison of selectivity of the trawl codends for whiting (Merlangius merlangus euxinus) in the Black Sea

Mustafa Zengin; İlkay Özcan Akpınar; Muharrem Hakan Kaykaç; Zafer Tosunoğlu

doi:10.12714/egejfas.2019.36.3.11

TR EN

Karadeniz’de Mezgit (Merlangius merlangus euxinus) avcılığındaki trol torba seçiciliklerinin karşılaştırılması

Öz

Karadeniz'de toplam mezgit (Merlangius merlangus euxinus) balığı avcılığının büyük bir kısmı, Türkiye kıyılarındaki geleneksel dip trol ağları ile gerçekleştirilmektedir. 40 mm ağ göz büyüklüğünde (40D) baklava gözlü ağlar bu trollerin torbalarında kullanılmaktadır. Bu çalışmada, geleneksel dip trol torbası (40D) ve farklı ağ göz büyüklüğündeki kare gözlü (36S ve 40S) trol torbaları mezgit balığının boy seçiciliği için mukayese edildi. Seçicilik verileri bir örtü torba yöntemi kullanılarak toplandı ve çekimler arası varyasyonlar hesaba katılarak analiz edildi. Seçicilik parametreleri CC2000 programı kullanılarak hesaplandı. Sonuçlar ticari olarak kullanılan 40D trol torbasının mezgit balığının olgunlaşmamış bireyleri için seçici olmadığını göstermiştir. Oysa baklava gözlü (40D) trol torbası yerine kare gözlü torba (36S ve 40D) değişikliği mezgit balığı için ağ göz seçiciliğini önemli ölçüde artırmıştır. 40S trol torbası 15,74 cm yüzde elli yakalanma oranı (L₅₀) ile ilk üreme boyundan daha yüksektir (L_M50). Sonuç olarak çalışmada denemeye alınan farklı ağ göz boyundaki tüm kare gözlü torbalar, mezgit balığının karaya çıkarılma büyüklüğü (MLS) göz önünde bulundurulduğunda uygun seçicilik sağlamıştır.

Anahtar Kelimeler

Karadeniz,mezgit,torba seçiciliği,baklava gözlü ağ,kare gözlü ağ

Comparison of selectivity of the trawl codends for whiting (Merlangius merlangus euxinus) in the Black Sea

Abstract

A large part of the total whiting (Merlangius merlangus euxinus) fishing in the Black Sea is carried out with the traditional bottom trawl nets along the coast of Turkey. Diamond mesh shape with 40 mm mesh size (40D) has been used in the codends of these trawls. In this study, the traditional trawl codend (40D) and square-mesh codend with different size (36S and 40S) were compared for whiting size selectivity in August 2014. Selectivity data were collected by using a covered codend method and analysed taking between haul variations in to account. The selectivity parameters were estimated by using CC2000 software. Results showed that commercially used 40D trawl codend is not selective enough to release immature of whiting. However, the net change in square mesh (36S and 40S) instead of a diamond-shaped (40D) mesh significantly improved the mesh selectivity for whiting. The 40S trawl codend is even higher than the first maturity size (L_M50) with a length at fifty percent retention (L₅₀) of 15.74 cm. In conclusion all square mesh codends with different mesh size tested here supplied appropriate selection considering minimum landing size (MLS) of whiting.

Keywords

The Black Sea,whiting,codend selectivity,diamond mesh,square mesh

Destekleyen Kurum

European Union

Proje Numarası

EU-FP7-312008

Teşekkür

This work was financed by the European Project “BENTHIS (EU-FP7-312008)”. The authors would like to thanks and gratitude to the project leader Prof. Dr. Adrian RJINSDORP providing all kinds of support. Thanks are also due to all the project researchers for participating the sea trials.

Kaynakça

Anonymous, (2016). 4/1 Numaralı Ticari Amaçlı Su Ürünleri Avcılığını Düzenleyen Tebliğ. [The commercial ﬁsh catching regulations in seas and inland waters in Turkey, Circular No. 4/1.]
Armstrong, D.W., Ferro, R.S.T., MacLennan, D.N. & Reeves, S.A. (1990). Gear selectivity and the conservation of fish. Journal of Fish Biology, 37, 261–262. DOI:10.1111/j.1095-8649.1990.tb05060.x
Ateş, C., Deval, M.C., Bök, T. & Tosunoğlu, Z. (2010). Selectivity of diamond (PA) and square (PE) mesh codends for commercially important fish species in the Antalya Bay, Eastern Mediterranean. Journal of Applied Ichthyology, 26, 465–471. DOI:10.1111/j.1439-0426.2010.01462.x
Aydın, C. & Tosunoğlu, Z. (2010). Selectivity of diamond, square and hexagonal mesh codends for Atlantic horse mackerel (Trachurus trachurus), European hake (Merluccius merluccius) and greater forkbeard (Phycis blennoides) in the eastern Mediterranean. Journal of Applied Ichthyology, 26, 71-77. DOI: 10.1111/j.1439-0426.2009.01376.x
Aydın, C., Tokaç, A., Ulaş, A., Maktay, B. & Şensurat, T. (2011). Selectivity of 40 mm square and 50 mm diamond mesh codends for five species in the Eastern Mediterranean demersal trawl fishery. African Journal of Biotechnology, 10, 5037–5047. DOI:10.5897/AJB11.082
Aydın, C. & Tokaç, A. (2015). Selectivity of 40 mm square- and 90º turned-mesh codend for the deepwater rose shrimp, Parapenaeus longirostris (Crustacea), and greater forkbeard, Phycis blennoides (Actinopterygii: Gadiformes: Phycidae), in the eastern Mediterranean. Acta Ichthyologica Piscatoria, 45(4), 353–362. DOI: 10.3750/AIP2015.45.4.03
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, 15–25. DOI:10.1016/j.fishres.2006.05.020
Bilgin, S., Bal H. & Taşcı, B. (2012). Length Based Growth Estimates and Reproduction Biology of Whiting, Merlangius merlangus euxinus (Nordman, 1840) in the Southeast Black Sea. Turkish Journal of Fisheries and Aquatic Science, 12, 871-881. DOI:10.4194/1303-2712-v12_4_15

Brčić, J., Herrmann, B. & Sala, A. (2018). Can a square-mesh panel inserted in front of the codend improve size and species selectivity in Mediterranean trawl fisheries? Canadian Journal of Fisheries and Aquatic Science, 75(5), 704-713. DOI:10.1139/cjfas-2017-0123
Broadhurst, M.K. & Millar, R.B. (2009). Square-mesh codend circumference and selectivity. ICES Journal of Marine Science, 66, 566-572. DOI:10.1093/icesjms/fsp001
Ceylan, Y., Şahin, C. & Kalaycı, F. (2014). Bottom trawl fishery discards on the Black Sea coast of Turkey. Mediterranean Marine Science, 15(1), 156-164. DOI:10.12681/mms.421
ConStat. (1995). CC Selectivity. Granspaettevej 10, DK 9800 Hjjlarring, Denmark
Dahm, E., Wienbeck, H., West, C.W., Valdemarsen, J.W. & O’Neill, F.G. (2002). On the influence of towing speed and gear size on the selective properties of bottom trawls. Fisheries Research, 55, 103-119. DOI:10.1016/S0165-7836(01)00301-0
Deval, M.C., Bök, T., Ateş, C., Ulutürk, T. & Tosunoğlu Z. (2009). Comparison of the size selectivity of diamond (PA) and square (PE) mesh codends for deepwater crustacean species in the Antalya Bay, eastern Mediterranean. Journal of Applied Ichthyology, 25, 372–380. DOI:10.1111/j.1439-0426.2009.01239.x
Düzbastilar, F.O., Breen, M., Aydın, C., Özbilgin, H., Özgül, A., Ulaş, A., Metin, G., Gül, B. & Lök A. (2017). Seasonal variation in mortality of red mullet (Mullus barbatus) escaping from codends of three different sizes in the Aegean Sea. Scientia Marina, 81(3), 339-349. DOI:10.3989/scimar.04600.19A
Düzbastılar, F.O., Laleli, T., Özgül, A. & Metin, G. (2015). Determining the severity of skin injuries of red mullet, Mullus barbatus (Actinopterygii: Perciformes: Mullidae), inflicted during escape from trawl codend. Acta Ichthyologica Piscatoria, 45(1), 75–83. DOI:10.3750/AIP2015.45.1.08
E.C. (2006). Council regulation (EC 1967/2006) concerning management measures for the sustainable exploitation of fishery resources in the Mediterranean Sea, amending Regulation (EEC) No. 2847/93 and repealing Regulation (EC) No.1626/94. Off. J. Eur. Union 409, 75.
Eryaşar, A.R. & Özbilgin, H. (2015). Implications for catch composition and revenue in changing from diamond to square mesh codends in the north-eastern Mediterranean. Journal of Applied Ichthyology, 31, 282–289. DOI:10.1111/jai.12643
Fryer, R. (1991). A model of the between-haul variation in selectivity. ICES Journal of Marine Science, 48(3), 281–290. DOI:10.1093/icesjms/48.3.281
Fryer, R.J. & Shepherd, J.G. (1996). Models of codend size selection. Journal of Northwest Atlantic Fishery Science, 19, 91–102.
Genç, Y., Mutlu, C., Zengin, M., Aydın, İ., Zengin, B. & Tabak İ. (2002). Doğu Karadeniz’deki av gücünün demersal balık stokları üzerine etkisinin tespiti. [Determination of the effect of catch effort on stocks of demersal fish in Eastern Black Sea]. (Report No: TAGEM/IY/97/17/03/006). Trabzon, Turkey, CFRI Press., 114 pp [In Turkish.]
GFCM. (2010). Report of the Transversal Workshop on Selectivity Improvement, By-Catch Reduction and Alternative Gears, Alexandria, Egypt, 25–27 October.
Graham, N., Kynoch, R.J. & Fryer R.J. (2003). Square mesh panel in demersal trawls: Further data relating haddock and whiting selectivity to panel position. Fisheries Research, 62(3), 361-375. DOI:10.1016/S0165-7836(02)00279-5
Guijarro, B. & Massuti, E. (2006). Selectivity of diamond- and square-mesh codends in the deep water crustacean trawl fishery off the Balearic Islands (western Mediterranean). ICES Journal of Marine Science, 63, 52–67. DOI:10.1016/j.icesjms.2005.08.011
Gümüş, A. & Zengin, M. (2011). 2000’li yılların başında Samsun balıkçılığının durumu: Çöken demersal stoklarına karşılık alternatife arayışlar. [The Situation of Samsun Fisheries in the beginning of 2000’s: Alternative Searches for Crude Demersal Fish Stocks] In: Samsun Sempozyumu, (pp. 315-333). Samsun, Turkey, Governorship of Samsun. [in Turkish.]
Herrmann, B. (2005). Effect of catch size and shape on the selectivity of diamond mesh codends. I. Model development. Fisheries Research, 71, 1-13. DOI: 10.1016/j.fishres.2004.08.024 İşmen, A. (2002). A preliminary study on the population dynamics parameters of whiting (Merlangius merlangus euxinus) in Turkish Black Sea coast waters. Turkish Journal of Zoology, 26, 157-166.
Kaykaç, M.H., Zengin, M. & Tosunoğlu, Z. (2018). Can Shifting Codend Mesh Shape and Mesh Size Increase the Size Selectivity of Red mullet (Mullus barbatus) in the Black Sea? Turkish Journal of Fisheries and Aquatic Science, 18, 859-870. DOI:10.4194/1303-2712-v18_7_04
Macher, C., Guyader, O., Talidec, C. & Bertignac, M. (2008). A cost-benefit analysis ofimproving trawl selectivity in the case of discards: The Nephrops norvegicus fishery in the Bay of Biscay. Fisheries Research, 92, 76–89. DOI:10.1016/j.fishres.2007.12.021
MacLennan, D.N. (1992). Fishing gear selectivity: an overview. Fisheries Research, 13, 201–204. DOI: 10.1016/0165-7836(92) 90076-6
Metin, C., Özbilgin, H., Tosunoğlu, Z., Gökçe, G., Aydın, C., Metin, G., Ulaş, A., Kaykaç, H., Lök, A., Düzbastılar, F.O. & Tokaç, A. (2005). Effect of square mesh escape window on codend selectivity for three fish species in the Aegean Sea. Turkish Journal of Veterinary and Animal Sciences, 29, 461–468.
Ordines, F., Enric, M., Beatriz, G. & Mas, R. (2006). Diamond vs. square mesh codend in a multi-species trawl fishery of the western Mediterranean: effect on catch composition, yield, size selectivity and discard. Aquatic Living Resources, 19, 329-338. DOI:10.1051/alr:2007003
Özbilgin, H. & Tosunoğlu, Z. (2003). Comparison of the selectivity of double and single codends. Fisheries Research, 63, 143-147. DOI:10.1016/S0165-7836(03)00005-5
Özbilgin, H., Tokaç, A. & Kaykaç, H. (2012). Selectivity of commercial compared to larger mesh and square mesh trawl codends for four fish species in the Aegean Sea. Journal of Applied Ichthyology, 28, 51-59. DOI:10.1111/j.14390426.2011.01916.x
Özbilgin, H., Tosunoğlu, Z., Aydın, C., Kaykaç, H. & Tokaç, A. (2005a). Selectivity of standard, narrow and square mesh panel trawl codends for hake (Merluccius merluccius) and poor cod (Trisopterus minutus capelanus). Turkish Journal of Veterinary and Animal Sciences, 29, 967–973.
Özbilgin, H., Tosunoğlu, Z., Metin, G. & Tokaç, A. (2005b). Seasonal variation in trawl codend selectivity of annular sea bream (Diplodus annularis L., 1758). Turkish Journal of Veterinary and Animal Sciences, 29, 959–965.
Özdemir, S., Erdem, Y. & Erdem, E. (2012). The Determination of Size Selection of Whiting (Merlangius merlangus euxinus) by Square Mesh Panel and Diamond Mesh Codends of Demersal Trawl in the Southern Part of Black Sea. Turkish Journal of Fisheries and Aquatic Science, 12, 407-410. DOI:10.4194/1303-2712-v12_2_29
Robertson, J.H.B. & Stewart P.A.M. (1988). A comparison of size selection of haddock and whiting by square and diamond mesh codends. ICES Journal of Marine Science, 44, 148–161.
Sala, A., Lucchetti, A. & Buglioni, G. (2007). The influence of twine thickness on the size selectivity of polyamide codends in a Mediterranean bottom trawl. Fisheries Research, 83, 192–203. DOI:10.1016/j.fishres.2006.09.013
Sala, A., Lucchetti, A., Perdichizzi, A., Herrmann, B. & Rinelli P. (2015). Is square-mesh better selective than larger mesh? A perspective on the management for Mediterranean trawl fisheries. Fisheries Research, 161, 182–190. DOI:10.1016/j.fishres.2014.07.011
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, 8–21. DOI:10.1016/j.fishres.2008.02.003
Santiago, J.L., Ballesteros, M.A., Chapela, R., Silva, C., Nielsen, K.N., Rangel, M., Erzini, K., Wise, L., Campos, A., Borges, M.F., Sala, A., Virgili, M., Viðarsson, J.R., Baudron, A. & Fernandes, P.G., (2015). Is Europe ready for a results-based approach to fisheries management? The voice of stakeholders. Marine Policy, 56: 86-97. DOI:10.1016/j.marpol.2015.02.006
Sardà, F., Bahamon, N., Moli, B. & Sardà-Palomera, F. (2006). The use of a square mesh codend and sorting grids to reduce catches of young fish and improve sustainability in a multispecies bottom trawl fishery in the Mediterranean. Scientia Marina, 70, 347–353.
STECF. (2017). Scientific, Technical and Economic Committee for Fisheries (STECF) – Stock assessments in the Black Sea (STECF-17-14). Publications Office of the European Union, Luxembourg, 2017, ISBN 978-92-79-67486-0, PUBSY No. JRC108835.DOI:10.2760/881421
Stewart, P.A.M. (2002). A review of studies of fishing gear selectivity in the Mediterranean. FAO COPEMED, 57 pp.
Tokaç, A., Herrmann, B., Gökçe, G., Krag, L.A., Nezhad, D.S., Lök, A., Kaykaç, 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. DOI:10.1016/j.fishres.2015.09.002
Tokaç, A., Özbilgin, H. & Tosunoğlu, Z. (2004). Effect of PA and PE material on codend selectivity in Turkish bottom trawl. Fisheries Research, 67(3), 317-327. DOI:10.1016/j.fishres.2003.10.001
Tosunoğlu, Z. Aydın, C. & Özaydın, O. (2008). Selectivity of a 50-mm diamond mesh knotless polyethylene codend for commercially important fish species in the Aegean Sea. Journal of Applied Ichthyology, 24, 311-315. DOI:10.1111/j.1439-0426.2008.01067.x
Tosunoğlu, Z., Aydın, C., Salman, A. & Fonseca, P. (2009). Selectivity of diamond, hexagonal and square mesh codends for three commercial cephalopods in the Mediterranean. Fisheries Research, 97, 95–102. DOI:10.1016/j.fishres.2009.01.006
Veiga, V., Pita, C., Rangel, M., Gonçalves, J.M.S., Campos, A., Fernandes, P.G., Sala, A., Virgili, M., Lucchetti, A., Brčić, J., Villasante, S., Ballesteros, M.A., Chapela, R., Santiago, J.S., Agnarsson, S., Ögmundarson, Ó. & Erzini, K., (2016). The EU landing obligation and European small-scale fisheries: What are the odds for success? Marine Policy, 64: 64-71. DOI:10.1016/j.marpol.2015.11.008.
Wienbeck, H., Herrmann, B., Moderhak, W. & Stepputtis D. (2011). Effect of netting direction and number of meshes around on size selection in the codend for Baltic cod (Gadus morhua). Fisheries Research, 109, 80–88. DOI:10.1016/j.fishres.2011.01.019
Wileman, D., Ferro, R.S.T., Fonteyne, R. & Millar, R.B. (1996). Manual of methods of measuring the selectivity of towed fishing gear (ICES Coop. Res. Rep., No. 215). Copenhagen K., Denmark, 126 pp.
Yıldız, T. & Karakulak, F.S. (2018). Batı Karadeniz (Şile-İğneada) dip trol balıkçılığında av kompozisyonu. Journal of Aquaculture Engineering and Fisheries Research 4(1), 20-34. DOI:10.3153/JAEFR18003
Zengin, M. & Düzgüneş E. (1999). Karadeniz’de mezgit (Merlangius merlangus euxinus Nord 1840) avcılığında kullanılan dip troll ağlarının seçicliğinin belirlenmesi. [Determination of the bottom trawl selectivity used in the catching of the whiting (Merlangius merlangus euxinus Nord 1840) in the Black Sea]. İstanbul University of Fisheries Faculty, Special Issue, 535-547. [in Turkish.]
Zengin, M., Gümüş, A., Süer, S., Dağtekin, M., Özcan A. İ., Dalgıç, G., Van, A., Zengin, M. & Zengin, B. (2015). Karadeniz’deki Trol Balıkçılığını İzleme Projesi (KARTRİP), Sonuç Raporu, Proje No: TAGEM/HAYSÜD/2010/09/01/04. TAGEM 2015 Yılı Program Değerlendirme Toplantısı, 04-08 Mart, 2015, Antalya.

Ayrıntılar

Birincil Dil

İngilizce

Konular

-

Bölüm

Araştırma Makalesi

Yazarlar

Mustafa Zengin
0000-0002-0243-1432
Türkiye

İlkay Özcan Akpınar
0000-0003-1421-984X
Türkiye

Muharrem Hakan Kaykaç ^*
0000-0002-4807-707X
Türkiye

Zafer Tosunoğlu
0000-0002-1168-9611
Türkiye

Yayımlanma Tarihi

15 Eylül 2019

Gönderilme Tarihi

13 Şubat 2019

Kabul Tarihi

1 Temmuz 2019

Yayımlandığı Sayı

Yıl 2019 Cilt: 36 Sayı: 3

DOI

https://doi.org/10.12714/egejfas.2019.36.3.11

IZ

https://izlik.org/JA69CX22NK

Kaynak Göster

RIS / Bibtex

APA

Zengin, M., Özcan Akpınar, İ., Kaykaç, M. H., & Tosunoğlu, Z. (2019). Comparison of selectivity of the trawl codends for whiting (Merlangius merlangus euxinus) in the Black Sea. Ege Journal of Fisheries and Aquatic Sciences, 36(3), 301-311. https://doi.org/10.12714/egejfas.2019.36.3.11

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