CELALETTİN AYDIN, Mehmet CİLBİZ, ALİ İLHAN, HASAN MUSA SARI

Selectivity of multifilament trammel and gillnets for common carp (Cyprinus carpio L., 1758) in Lake Marmara

Bu çalışmada, Marmara Gölü'ndeki sazan balığı (Cyprinus carpio L., 1758) için multifilament fanyalı ve galsama uzatma ağlarının seçicilik özelliklerinin tahmin edilmesi amaçlanmıştır. 210d/2 ip kalınlığına ve 4, 6, 8, 10 cm ağ gözü açıklığına sahip fanyalı ve galsama ağlar Marmara Gölü'nde test edilmiştir. Ayrıca elde edilen verilerle 11, 12, 13 ve 14 cm göz açıklığındaki fanyalı ve galsama uzatma ağlarının optimum yakalama boyları için modelleme yapılmıştır. Seçicilik parametrelerinin tahmininde SELECT metot kullanılmıştır. Avcılık denemeleri gölü yatay olarak temsil edecek şekilde; batı, orta ve doğu kısmından belirlenen üç farklı istasyonda aylık olarak yürütülmüştür. Hem fanyalı hem de galsama ağları ile 36 adet avcılık denemesi yapılmıştır. 11,3 - 49,0 cm boy aralığında toplam 119 adet sazan yakalanmıştır. Hem fanyalı hem de galsama ağları için en düşük sapmayı veren Bi-normal modele göre; 4, 6, 8, 10, 11, 12, 13 ve 14 cm göz açıklığındaki fanyalı ağların model boyları; 12,98, 19,47, 25,96, 32,45, 35,70, 38,94 ve 42,19 cm, aynı göz açıklığındaki galsama ağları için model boyları 12,40, 18,60, 24,80, 31,00, 34,10, 37,20, 40,30 ve 43,40 cm, olarak tahmin edilmiştir. Sazan balığının 40 cm minimum avlama boyu göz önüne alındığında, 13 cm göz açıklığının altındaki hem galsama hem de fanyalı uzatma ağlarının yasaklanması tavsiye edilmektedir.

Marmara Gölü'nde sazan balığı (Cyprinus carpio L., 1758) için multifilament fanyalı ve galsama uzatma ağlarının seçiciliği

This study was aimed to estimate the selectivity properties of multifilament trammel and gillnets for common carp (Cyprinus carpio L., 1758) in Marmara Lake in Manisa, Turkey. Trammel and gillnets of 4, 6, 8, and 10 cm stretched mesh size and 210 d/2 no twine thickness were tested in the Marmara Lake. In addition, selectivity parameter of 11, 12, 13 and 14 cm mesh size of trammel and gillnets were modelled. SELECT method was used to estimate the selectivity parameters. Experiments were carried out monthly in the three different stations identified eastern, middle and western areas which represent longitudinal length of the lake. A total of 36 trials were conducted both nets. A total of 119 common carps were caught ranges between 11.3 - 49.0 cm total lengths. According to the Bi- normal model, which gave the lowest deviance for both trammel and gillnets, selectivity curves were estimated for 4, 6, 8, 10, 11, 12, 13 and 14 cm stretched mesh size modelled lengths as 12.98, 19.47, 25.96, 32.45, 35.70, 38.94, 42.19 and 45.43 cm for trammel nets, 12.40, 18.60, 24.80, 31.00, 34.10, 37.20, 40.30 and 43.40 cm for gillnets, respectively. When considering minimum landing size (40 cm total length), it is recommended that both nets under 13 cm mesh size should be prohibited for common carp fishery in the Lake Marmara.

PDF

___

Anonymous, (2008). The commercial fish catching regulations in seas and inland waters in 2008-2012 fishing period: circular No. 2008/48 (in Turkish). Republic of Turkey. Minister of Agriculture and Rural Affair, General Directorate of Conservation and Inspection, Ankara. 108. pp.
Arı, Y. & Derinöz, B. (2011). How not to manage a wetland? The case of Lake Marmara (Manisa) with a cultural ecological perspective (in Turkish). Coğrafi Bilimler Dergisi, 9 (1): 41-60. doi: 10.1501/Cogbil_0000000117
Balık, İ. (1996). The Investigation of Selectivity and Productivity of Multifilament Trammel Net and Multifilament Gill Net and Monofilament Gill Net That Used on Fishing for Carp Fish (Cyprinus carpio L. 1758) and Pike-Perch (Stizostedion lucioperca (L. 1758)) in Lake Beyşehir (in Turkish). PhD Thesis, Ege University Graduate School of Natural and Applied Science, Bornova/İzmir/Turkey.
Balık, I. (1999). Investigation of the selectivity of monofilament gill nets used in carp fishing (Cyprinus carpio L., 1758) in Lake Beyşehir. Turkish Journal of Zoology, 23(2): 185-187.
Carol, J. & García-Berthou, E. (2007). Gillnet selectivity and its relationship with body shape for eight freshwater fish species. Journal of Applied Ichthyology, 23 (6): 654-660. doi: 10.1111/j.1439-0426.2007.00871.x
Cilbiz, M., Küçükkara, R., Ceylan, M., Savaşer, S. & Meke, T. (2015). Trammel Net Selectivity of Common Carp (Cyprinus carpio L., 1758) in Manyas Lake, Turkey. Journal of Limnology and Freshwater Fisheries Research, 1 (1): 1-7. doi: 10.17216/LimnoFish-5000083989
Fabi, G., Sbrana, M., Biagi, F., Grati, F., Leonori, I. & Sartor, P. (2002). Trammel net and gill net selectivity for Lithognathus mormyrus (L., 1758), Diplodus annularis (L., 1758) and Mullus barbatus (L., 1758) in the Adriatic and Ligurian Seas. Fisheries Research, 54 (3): 375-388. doi: 10.1016/S0165-7836(01)00270-3
Emiroğlu, Ö. (2011). Alien fish species in upper Sakarya River and their distribution. African Journal of Biotechnology, 10 (73): 16674-16681. doi:10.5897/AJB10.2502
Holt, S.J. (1963). A method for determining gear selectivity and its application. ICNAF Special Publication, 5: 106-115.
İlhan, A. & Sarı, H.M. (2013): Fish fauna and fisheries activities in Lake Marmara (in Turkish). Ege Journal of Fisheries and Aquatic Sciences, 30 (4): 187-191. doi: 10.12714/egejfas.2013.30.04.08
Karakulak, F. S. & Erk, H. (2008). Gill net and trammel net selectivity in the northern Aegean Sea, Turkey. Scientia Marina, 72 (3): 527-540.
Millar, R.B. (1992). Estimating the Size-Selectivity of Fishing Gear by Conditioning on the Total Catch. Journal of the American Statistical Association, 87(420): 962-968. doi: 10.2307/2290632
Millar, R.B. & Fryer, R.J. (1999). Estimating the size-selection curves of towed gears, traps, nets and hooks. Reviews in Fish Biology and Fisheries, 9 (1): 89-116.
Millar, R.B. & Holst, R. (1997). Estimation of gillnet and hook selectivity using log-linear models. ICES Journal of Marine Science, 54 (3): 471-477.
Millar, R.B. (2009). R Code for fitting SELECT models to gillnet data. In: Department of Statistics, University of Auckland, New Zealand. Retrieved from (Accessed: 25.02.2016).
Millar, R.B. (2010). R Code for fitting SELECT models to gillnet data. In: Department of Statistics, University of Auckland, New Zealand. Retrieved from (Accessed:25.02.2016).
Özyurt, C. E. & Avşar, D. (2005). Investigation of the selectivity parameters for carp (Cyprinus carpio Linnaeus, 1758) in Seyhan Dam Lake. Turkish Journal of Veterinary and Animal Sciences, 29 (2): 219-223.
Park, H. H., Millar, R. B., Bae, B.-S., An, H. C., Chun, Y. Y., Yang, J. H. & Yoon, S. C. (2011). Size selectivity of Korean flounder (Glyptocephalus stelleri) by gillnets and trammel nets using an extension of SELECT for experiments with differing mesh sizes. Fisheries Research, 107(1-3): 196- 200. doi: 10.1016/j.fishres.2010.10.020
Siegel, J. & Castellan, N. S. (1989). Non parametric statistics for the behavioural sciences. Statistics Series, 2nd Edition: Mc Graw Hill, New York.
Thomas, S.N., Edwin, L. & George, V.C. (2003). Catching efficiency of gill nets and trammel nets for penaeid prawns. Fisheries Research, 60(1): 141- 150. doi: 10.1016/S0165-7836(02)00057-7
TUIK (2015). Turkey Statistical Institute. Fishery Statistics. Retrieved from http://www.turkstat.gov.tr/PreTablo.do?alt_id=1005 (Accessed: 23.02. 2016)
Yalçın, N. (2006). Comparison of the Selectivity Parameters for Common Carp (Cyprinus carpio L, 1758) and Mirror Carp (Cyprinus carpio L., 1758 var. specularis) in Dam Lakes (in Turkish). Ist Fish Introduction and Reservoir Management Symposium, 07-09. February 2006 Antalya.p 281-288 (Full text available in Akuademi.net).
Yüksel, F., Gündüz, F. & Demirol, F. (2014). Gillnet selectivity for Luciobarbus esocinus (Heckel, 1843) in Keban Dam Lake, Elaziğ, Turkey. Indian Journal of Fisheries, 61 (2): 108-111.