Selectivity of monofilament gillnets with different mesh sizes used in fishing of pearl mullet, (Alburnus tarichi (Güldenstädt, 1814)) in Lake Van

Mustafa Akkuş; Adem Sezai Bozaoğlu; Ahmet Raif Eryaşar

doi:10.12714/egejfas.40.1.08

EN TR

Selectivity of monofilament gillnets with different mesh sizes used in fishing of pearl mullet, (Alburnus tarichi (Güldenstädt, 1814)) in Lake Van

Abstract

This study was carried out between September 2020 and March 2021 to determine the selectivity of monofilament gillnets used in pearl mullet, Alburnus tarichi (Güldenstädt, 1814), fishing in Lake Van. The SELECT method was applied to determine the selectivity. The best model for the selectivity of monofilament gillnets used in pearl mullet fishing was determined as the log-normal model. The optimum catch lengths of monofilament gillnets with 20, 22 and 24 mm mesh sizes were calculated as 21.69 cm, 23.84 cm and 26.01 cm, respectively. Catch per unit effort was determined as 10.03 kg/90 m/day at 20 mm, 15.91 kg/90 m/day at 22 mm and 12.99 kg/90 m/day at 24 mm. The average catch per unit effort was determined as 151 unit/90 m/day at 20 mm, 151 unit/90 m/day at 22 mm, and 110 unit/90 m/day at 24 mm. According to the results of optimum catch length and daily average catch per unit effort, using monofilament gillnets with 22 mm mesh size was more convenient for sustainable pearl mullet fishing in Lake Van.

Keywords

Van Gölü İnci Kefali (Alburnus tarichi (Güldenstädt,1814)) avcılığında kullanılan farklı ağ göz açıklığına sahip monofilament sade uzatma ağlarının seçiciliği

Öz

Bu çalışma, Van Gölü inci kefali, Alburnus tarichi (Güldenstädt, 1814), avcılığında kullanılan monofilament sade uzatma ağlarının seçiciliğinin belirlenmesi amacıyla 2020 Eylül ve 2021 Mart tarihleri arasında gerçekleştirilmiştir. Seçiciliğin belirlenmesinde SELECT metod kullanılmıştır. İnci kefali avcılığında kullanılan monofilament galsama ağlarının seçiciliği için en iyi modelin log-normal modeli olduğu belirlenmiştir. 20, 22 ve 24 mm ağ göz genişliğine sahip monofilament sade uzatma ağlarının optimum yakalama boyları sırasıyla 21,69 cm, 23,84 cm ve 26,01 cm olarak hesaplanmıştır. Birim av verimi 20 mm de 10,03 kg/90 m/gün, 22 mm de 15,91 kg/90 m/gün ve 24 mm de 12,99 kg/90 m/gün olarak tespit edilmiştir. Adet olarak ortalama birim av verimi 20 mm de 151 adet/90 m/gün, 22 mm de 151 adet/90 m/gün ve 24 mm de 110 adet/90 m/gün olarak belirlenmiştir. Optimum yakalama boyu ve günlük ortalama birim av verimi sonuçlarına göre, Van Gölü’nde sürdürülebilir inci kefali avcılığı için 22 mm ağ göz genişliğindeki monofilament galsama uzatma ağlarının kullanılmasının daha uygun olduğu belirlenmiştir.

Anahtar Kelimeler

Destekleyen Kurum

Van Yüzüncü Yıl Üniversitesi Bilimsel Araştırmalar Projeleri Koordinasyon Birimi

Proje Numarası

FHD-2020-8664

Teşekkür

Projeyi destekleyerek, bu çalışmanın gerçekleşmesini sağlayan Van Yüzüncü Yıl Üniversitesi Bilimsel Araştırmalar Projeleri Koordinasyon Birimi'ne teşekküre ederiz.

Kaynakça

Alverson, D.L., Freeberg, M.H., Pope, H., & Murawski, S.A. (1994). A Global assessment of fisheries by-catch and discards. FAO Fish Technical Paper No: 339, 233p.
Aura, C.M., Nyamweya, C.S., Njiru, J.M., Musa, S., Ogari, Z., May, L., & Wakwabi, E. (2018). Exploring the demarcation requirements of fish breeding and nursery sites to balance the exploitation, management and conservation needs of Lake Victoria ecosystem. Fisheries Management and Ecology, 1-9. https://doi.org/10.1111/fme.12311
Avşar, D. (2005). Fisheries Biology and Population Dynamics. Nobel Yayınevi, 332 s. (in Turkish) Bozaoğlu, A.S., Akkuş, M., & Yeşil, A. (2019). Pearl Mullet (Alburnus tarichi (Guldenstaedtii, 1814)) Fishing with trammel nets in Lake Van. Commagene Journal of Biology, 3(1): 27-31. https://doi.org/10.31594/commagene.547234
BSGM, (2020). Regulation for Commercial Fisheries in Seas and Inland Waters for 2020–2024 Fishing Period. Number 5/1 (No: 2020/20). Ankara: General Directorate of Fisheries and Aquaculture (BSGM), Republic of Turkey Ministry of Food Agriculture and Livestock; 69 pp. (in Turkish)
Çetinkaya, O., Sarı, M., & Arabacı, M. (1995). A Preliminary study on catch composition and selectivity of the trammel net used in fishing of Chalcalburnus tarichi (Pallas 1811) in Lake Van (Türkiye). Su Ürünleri Dergisi, 12 (1-2), 1-13. (in Turkish with English abstract)
Godøy, H., Furevik, D., & Løkkeborg, S. (2003). Reduced bycatch of red king crab (Paralithodes camtschaticus) in the gillnet fishery for cod (Gadus morhua) in northern Norway. Fisheries Research, 62(3), 377-384. https://doi.org/10.1016/S0165-7836(02)00281-3
İlkyaz, A.T. (2005). Determination of gillnet size selectivity by the direct estimation method. Ege University Graduate School of Natural and Applied Sciences, PhD Thesis, 131 p.
Kılıç, S. (2014). A new concept “precautionary fisheries management” for the management of fish stocks in Turkey seas. Yunus Araştırma Bülteni, (4): 85-97.

Kolding, J., & Skalevik, A. (2011). PasGear 2. A database package for experimental or artisanal fishery data. Version 2.5. Retrieved from http://www.imr.no/forskning/utviklingssamarbeid/eaf_nansen_programmet/pasgear_2/en
Millar, R.B. (1992). Estimating the size-selectivity of fishing gear by conditioning on the total catch. Journal of the American Statistical Association, 87, 962- 968. https://doi.org/10.1080/01621459.1992.10476250
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, 89-116. https://doi.org/10.1023/A:1008838220001
Millar, R.B., & Holst, R. (1997). Estimation of gillnet and hook selectivity using Log-linear Models. ICES Journal of Marine Science, 54, 471-477. https://doi.org/10.1006/jmsc.1996.0196
Mullon, C., Freon, P., & Cury, P. (2005). The dynamics of collapse in world fisheries. Fish and Fisheries, 6(2), 111-120. https://doi.org/10.1111/j.1467-2979.2005.00181.x
Özdemir, H. (2000). A study on the catch yield and selectivity of monofilament gillnets used in the fishing of İnci Kefali (Chalcalburnus tarichi Pallas, 1811) in Lake Van. Master Thesis, Yüzüncü Yıl University Department of Fisheries and Processing Technology, Van, 68 p.
Regier, H.A. & Robson, D.S. (1966). Selectivity of gill nets, especially to lake whitefish. Journal Fisheries Research Board Canada. 23, 423-454p. https://doi.org/10.1139/f66-034
Rosman, I. & Maugeri, S. (1980). Fishing with bottom gillnets, FAO training series 3, Roma, 39p.
Sarı, M. (1997) The Stock Assessment of Chalcalburnus tarichi, Pallas 1811 in The Lake of Van and The Determination of The Basis Fishery Management. PhD Thesis. Ege University Department of Fisheries and Processing Technology. İzmir, 150p. (in Turkish).
Sarı, M., & Tokaç, A. (2000). Comparison of the catching efficiency of the two different trammel nets used in fishing of Chalcarburnus tarichi, Pallas (1811). Ege Journal of Fisheries and Aquatic Sciences, 17(3-4):27-33
Sürer, M.İ., & Kuşat, M. (2013). Comparative of catching and economic efficiency of monofilament and multifilament gill nets in Eğirdir Lake. Suleyman Demirel University Journal of Natural and Applied Science, 17(1), 43-48.
TUIK (2022). Fishery Statistics of Turkey. https://data.tuik.gov.tr/ Bulten/Index?p=Su-Urunleri - 2021-45745 (07.08.2022).
Williams, N. (1998). Overfishing Disrupts Entire Ecosystems. Sciences, 279, 809-809. https://doi.org/10.1126/science.279.5352.809

Ayrıntılar

Birincil Dil

İngilizce

Konular

Balıkçılık Yönetimi

Bölüm

Araştırma Makalesi

Yazarlar

Mustafa Akkuş ^*
0000-0002-8900-9495
Türkiye

Adem Sezai Bozaoğlu
0000-0003-4078-5159
Türkiye

Ahmet Raif Eryaşar
0000-0001-7656-6113
Türkiye

Yayımlanma Tarihi

15 Mart 2023

Gönderilme Tarihi

11 Kasım 2022

Kabul Tarihi

10 Şubat 2023

Yayımlandığı Sayı

Yıl 2023 Cilt: 40 Sayı: 1

DOI

https://doi.org/10.12714/egejfas.40.1.08

IZ

https://izlik.org/JA54ET29KR

Kaynak Göster

RIS / Bibtex

APA

Akkuş, M., Bozaoğlu, A. S., & Eryaşar, A. R. (2023). Selectivity of monofilament gillnets with different mesh sizes used in fishing of pearl mullet, (Alburnus tarichi (Güldenstädt, 1814)) in Lake Van. Ege Journal of Fisheries and Aquatic Sciences, 40(1), 56-61. https://doi.org/10.12714/egejfas.40.1.08