TY - JOUR TT - Mortality Rates and Stock Assessment of Tench (Tinca tinca L., 1758) in Lake Yenicaga (Bolu- Turkey) AU - Kılıç, Savaş AU - Becer, Zehra Arzu PY - 2015 DA - April DO - 10.22392/egirdir.246344 JF - Süleyman Demirel Üniversitesi Eğirdir Su Ürünleri Fakültesi Dergisi JO - JEFF PB - Isparta University of Applied Sciences WT - DergiPark SN - 1308-7517 SP - 1 EP - 9 VL - 11 IS - 1 KW - Bolu KW - kadife balığı KW - Tinca tinca KW - ölüm oranları KW - stok tahmini KW - Yeniçağa Gölü N2 - The mortality rates of the 291 tench sampled from the Lake Yenicaga between March 2009 and July 2010 were investigated, by the estimation of stock size, suitable fishing effort, yield and biomass determined to utilize most efficient way. Total mortality (Z), natural mortality (M), and fishing mortality (F) coefficients, stock exploitation (E) and survival (S) rateswere calculated as Z= 0.55 year-1, M= 0.46 year-1, F= 0.09 year- 1, E= 0.16 year-1, and S= 57.86%, respectively. During the research period 8344 (4350 kg) tench which were fished from Lake of Yenicaga, was calculated that in one fishing season 130204 (43317 kg) tench were found in the lake. To benefit from this stock most efficiently, by increasing the current fishing effort 203% were determined that 8793 kilos of yield could be obtained. CR - Anonim, 2015. Avlanan talısu ürünleri miktarı. Türkiye İstatistik Kurumu. http://www.tuik.gov.tr (erişim tarihi, 09 Temmuz, 2015). CR - Balık, S., Sarı, H., Ustaoğlu, M.R., İlhan, A. 2004. Çivril Gölü (Denizli, Türkiye) kadife balığı (Tinca tinca (L., 1758)) populasyonunun yapısı, mortalitesi ve büyümesi. Turk. J. Vet. Anim. Sci., 28: 973-979. CR - Balık, I., Çubuk, H., Çınar, Ş., Özkök, R. 2009. Population structure, growth, mortality and estimated stock size of the introduced tench, Tinca tinca (L.), population in Lake Beysehir, Turkey. Journal of Applied Ichthyology, 25(2): 206-210. CR - Benzer, S. 2014. Population structures and some growth properties of tench (Tinca tinca L., 1758) in Mogan Lake, Ankara, Turkey. Ankara Üniv. Vet. Fak. Derg., 61: 261-266. Beverton, R.J.H., Holt, S.J.1957. On the Dynamics of Exploited Fish Populations. U.K. Min. Agric. Fish. Invest. Series 2, London. CR - Gulland, J.A. 1971. The Fish Resources of the Ocean. West By fleet, Surrey, Fishing News (Books) Ltd., England. CR - Jones, R. 1984. Assessingtheeffect of changes in exploitation patterns using length composition data (with notes on VPA and cohort analysis). FAO Fisheries Technical Paper, 256, Rome. CR - Kılıç, S. 2003. Yeniçağa Gölü’ndeki sazan (Cyprinus carpio carpio L., 1758) populasyonu ve avcılığı. Yüksek Lisans Tezi, Karadeniz Teknik Üniversitesi, Trabzon. Kılıç, S., Becer Özvarol, Z.A. 2008. Yeniçağa Gölü’nün (Bolu) av kompozisyonunun belirlenmesi üzerine bir çalışma. Su Ürünleri Mühendisleri Derneği Dergisi, 32: 18-21. CR - Lagler, K.F. 1966. Fresh water Fishery Biology. W.M.C. Brown Company, Iowa. Okgerman, H., Yıgıt Atasagun, S., Oral, M. 2010. The age and growth features of tench (Tinca tınca L., 1758) in Kapulukaya Dam Lake. Central Anatolia, Turkey. Journal of Anımal and Veterinary Advances, 9 (13): 1833-1838. CR - Pauly, D. 1980. On the interrelationships between natural mortality, growth parameters, and mean environmental temperature in 175 fishstocks. J. Cons. Int. Explor. Mer., 39 (2): 175-192. CR - Pompei, L., Franchi, E., Giannetto, D., Lorenzoni, M. 2012. Growth and reproductive properties of Tench, Tinca tinca Linnaeus, 1758 in Trasimeno Lake (Umbria, Italy). Knowledge and Management of Aquatic Ecosystems, 406, 07. CR - Ricker, W.E. 1975. Computations and interpretation of biological statistics of fish populations. Fish. Res. Bd. CanadaBull, 191. CR - Saygı, B.Y., Demirkalp, F.Y. 2004. Trophic status of shallow Yeniçağa Lake (Bolu, Turkey) in relation to physical and chemical environment. Fresenius Environmental Bulletin, 13(5): 385-393. CR - Sparre, P., Venema, S.C. 1992. Introduction to Tropical Fish Stock Assesment. FAO Fisheries Technical Paper, Review: 1, Rome. UR - https://doi.org/10.22392/egirdir.246344 L1 - https://dergipark.org.tr/en/download/article-file/214174 ER -