Estimation of Exploitable Sprat (Sprattus sprattus, Linnaeus, 1758) Biomass along Black Sea Coasts of Turkey (Samsun Region): This Paper is Dedicated to the Memory of Sedat GÖNENER

Year 2020, Volume: 9 Issue: 3, 1 - 8, 25.12.2020

Uğur Özsandıkçı

Abstract

In this study, exploitable stock biomass of sprat (Sprattus sprattus, Linnaeus, 1758) distributed along Samsun shelf area (SSA) was estimated for the period 2014 January – May. “Swept Area” method was used in the study. Catch per unit area (CPUA) and stock biomass of sprat in the SSA in size 2508.395 km2 were estimated for deeper and shallower waters than 40 meters which were accepted as the midpoint. Accordingly, CPUA values were determined as; 40018.76 ± 10852.61 kg/km2 in shallower area than 40 meters, 27758.77 ± 4.242.07 kg/km2 in deeper area than 40 meters and 33602 ± 6017.46 kg/km2 for SSA. The exploitable stock size of sprat was estimated as 84287 ± 15094 tons in SSA. Average length values of sampled sprats were 7.08 ± 0.02 and it was determined that 7-7.4 cm is the densest size group in the distribution of length-frequency. The other hand, length frequency distribution with respect to depth, densest size groups as follows; 7 – 7.4 cm for shallower waters than 40 meters, 6.5 – 6.9 cm for deeper waters than 40 meters.

Keywords

swept area, Sprattus sprattus, CPUA, Mid water trawl, Black Sea

Thanks

This paper is dedicated to the memory of Sedat Gönener (gone but never forgotten) who supervised the master thesis that is the basis of this work. We also kindly thank to Cemal MALKOÇ and “Malkoçoğlu Fisheries Comp.” for providing generous contributes to the study.

References

• Balık, İ., (2018). Comparatively Evaluation of the Sprat (Sprattus sprattus) Fisheries in the Whole of the Black Sea and in the Turkish Coast of the Black Sea. Turkish Journal of Maritime and Marine Sciences, 4(1).
• Bat L, Erdem Y, Ustaoğlu Tırıl S, Yardım Ö., (2008). Balık Sistematiği. Nobel Yayın No: 1330, Fen Bilimler: 77, Nobel Bilim ve Araştırma Merkezi Yayın No: 31. Ankara.
• Daskalov, G., (1999). Relating fish recruitment to stock biomass and physical environment in the Black Sea using generalized additive models. Fish. Res. 41:1–23.
• DUYAR, H. A., BAYRAKLI, B., & ÖZDEMİR, S. Karadeniz’de Hamsi (Engraulis encrasicolus) ve Çaça (Sprattus sprattus) Balıklarının Avcılığı ile Balık Unu-yağı İşleme Teknolojisi Üzerine Bir Araştırma. Menba Kastamonu Üniversitesi Su Ürünleri Fakültesi Dergisi, 5(2), 9-16.
• Erdem, E., (2012). Orta Karadeniz bölgesinde ortasu trolü ile avlanan balık stoklarının tahmin edilmesi. Sinop Üniversitesi Fen Bilimleri Enstitüsü. Sinop, Türkiye. 108s.
• Erdem, Y., Özdemir, S., (2008). Karadeniz kıyılarında çift tekne ile çekilen ortasu trolü ile bazı pelajik balıkların avcılığı, O.M.Ü. Ziraat Fakültesi Dergisi 23(2): 78-82
• Erkoyuncu, İ., (1995). Balıkçılık Biyolojisi ve Populasyon Dinamiği. Ondokuz Mayıs Üni. Yayınları, Samsun, 265 pp.
• Kalaycı, F., Bilgin, S., Samsun, O., & Samsun, N., (2006). Orta Karadeniz’de Avlanan Çaça (Sprattus sprattus phalericus RISSO, 1826) Stoğunun Genel Durumu ve Balık Endüstrisi İçerisindeki Yerinin Araştırılması. Ege Üniversitesi Su Ürünleri Dergisi, 23(1/3), 449-455.
• Keskin, Ç., (2010). A review of fish fauna in the Turkish Black Sea. Black Sea/Mediterranean Environment, 16 (2): 195-210. ISSN: 1304-950
• Marine Information Service (2016). EMODnet Digital Bathymetry (DTM). Marine Information Service. http://doi.org/10.12770/c7b53704-999d-4721-b1a3-04ec60c87238
• Nikolsky, V.N., Yuneva, T.V., Schepkina, A.M., Bat, L., Kideys, A.E. and Shulman, G.E., (2009). Interannual changes of lipid content in the Black Sea sprat. In: G. Shulman, B. Öztürk, E. Kideyş, G. Finenko, L. Bat (Eds.), Trophic relationships and food supply of heterotrophic animals in the pelagic ecosystem of the Black Sea, Black Sea Commission Publ., Istanbul: 227-245.
• Özdemir, S., Erdem, E., Birinci Özdemir, Z., & Aksu, H. (2015). Monthly monitoring of length–weight relationships of allis shad (Alosa immaculata Bennett, 1835), horse mackerel (Trachurus mediterraneus Steindacher, 1968) and sprat (Sprattus sprattus Linnaeus, 1758) from the Southern Black Sea, Turkey. Cahiers de Biologie Marine, 56(1), 25-30.
• Özdemir, S., Erdem, Y., Birinci Özdemir, Z., Erdem, E., Aksu, H., 2018. Estimation of growth parameters and mortality rates of sprat (Sprattus sprattus L.) and anchovy (Engraulis encrasicolus, L.) captured in the Black Sea. Turkish Journal of Maritime and Marine Sciences
• Panayotova, M. D., Raykov, V. S., Todorova, V. R., (2012). Turbot (Psetta maxima L.) abundance indices and stock dynamics of Bulgarian Black Sea Coast during the period 2006-2009. Acta zool. bulg., 64 (1). 85-91
• Prodanov, K., Mikhailov, M., Dasklov, G., Maxim, C., Chashchin, A., Arkhipov, A., Shlyakhov, V., Özdamar, E., (1997).
• Environmental Management Of Fish Resources In The Black Sea And Their Rational Exploitation. General Fisheries Council For the Mediterranean, FAO Studies and Reviews, 60, 100-110
• Radu, G., Maximov, V., Anton, E., Cristea, M., Țiganov, G., Țoțoiu, A., & Spînu, A. D., (2013). State of the fishery resources in the Romanian marine area. Cercetări Marine, 43, 268-295.
• Samsun, O., Kalaycı, F., Samsun, N., Bilgin, S., (2006). Karadeniz’de orta su trolü ile avlanan pelajik balıkların bazı biyolojik özellikleri ve avcılık verilerinin incelenmesi. E.Ü. Su Ürünleri Dergisi, 23(1/3): 487-493.
• Satılmış, H. H., (2005). Egg Production and Distribution of Egg and Larvae of Small Pelagic Fish in Sinop Coast. Ph.D., Ondokuz Mayıs University Graduate School of Natural and Applied Sciences, Sinop, 174p.
• Sparre, P., Venema, S.C., (1998). Introduction to Tropical Fish Stock Assessment, Part I: Manual. FAO Fisheries Technical Papers, No 306/1 Rev.2 ISBN 92-5-103996-8.
• STECF., (2011). Black Sea Assessments (STECF-OWP-11-06). Publications Office of the European Union, Luxembourg, EUR 25020 EN, JRC 67414, 213 pp.
• STECF., (2012). Black Sea Assessments (STECF-12-15). Publications Office of the European Union, Luxembourg, EUR 25580 EN, JRC 76532, ISBN 978-92-79-27208-0 236 pp.
• STECF., (2014). Black Sea Assessments (STECF-14-14). Publications Office of the European Union, Luxembourg, EUR 26896 EN, JRC 92436, 421 pp.
• TurkStat., (2015). Turkish Statistical Institute Fishery Statistics https://biruni.tuik.gov.tr/medas/?kn=97&locale=en (Date of Access: 20.12.2015)
• Zengin, M., Düzgüneş, E., Dinçer, A.C., Mutlu, C., Bahar, M. & Tabak, İ., (2003). Karadeniz’de Orta Su Trolünün Kullanım Olanakları ve Av Verimliliğinin Araştırılması. TAGEM/HAYSUD/1998/17/03/007, Nolu Proje Raporu, T.K.İ.B. Su Ürünleri Araştırma Enstitüsü, Trabzon, Türkiye