The first data on the population parameters and morphometry of Mesogobius batrachocephalus (Pallas 1814) (Family: Gobiidae) in the southern Black Sea

Knout goby, Mesogobius batrachocephalus Pallas, 1814, which belongs to Gobiidae, inhabits inthe Black Sea, Sea of Azov, the Caspian Sea and the rivers that flow in these three seas. The majorpopulation parameters and morphometry of Mesogobius batrachocephalus from the coasts of thesouthern Black Sea were investigated in this study. A total of 641 individuals were sampled between January 2019 and December 2019 between the depths of 2 to 120 m depth by using a trammel net with a mesh size of 17-24 mm. The average length and weight values were calculated as23.1 cm (5.3-34.0) and 130.1 g (1.34-377.54) respectively. The male to female ratio of the population was found as 1:0.91 (P>0.05). Age of sampled 641 individuals varies between zero andseven. For all the sampled individuals, the von Bertalanffy growth parameters were calculated as;L∞ = 38.2 cm, k = 0.245 year-1 and t0 = -1.873 year and the length-weight relationship was foundas W = 0.0058 TL3.148. Total mortality (0.481), natural mortality (0.466), fishing mortality (0.015),growth performance index (2.55) and condition factor (0.913) were calculated. The maximumvalue of gonadosomatic index was reached in March. Average relative fecundity was found to be118.3 eggs per g (78.9-234.5), while the average diameter of the eggs was found as 2733.0 µm±221.18 (2287.1-3097.8). This study provides the first data on the population parameters and themorphometry of Mesogobius batrachocephalus. These data could contribute to the establishmentof a sustainable management plan for fisheries resources in the Black Sea.

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Ak, O., Kutlu, S., Aydın, I. (2009). Length-weight relationship for 16 fish species from the Eastern Black Sea, Turkey. Turkish Journal of Fisheries and Aquatic Science, 9, 125-128.

Bănărescu, P. (1964). Fauna RPR. Pisces-Osteichthyes. Vol XVIII, Editura R.P.R., București.

Bengı̇l, E.G.T., Aydın, M. (2020). The length and weight re-lationships and feeding ecology of knout goby, Mesogobius batrachocephalus (Pallas, 1814) from Southern Black Sea. Ege Journal of Fisheries and Aquatic Sciences, 37(4), 409-414. https://doi.org/10.12714/egejfas.37.4.12

Berg, L.S. (1965). Freshwater fishes of the U.S.S.R. and adjacent countries. Volume 3, 4th edition. Israel Program for Scientific Translations Ltd, Jerusalem.

Beverton, R.J.H., Holt, S.J. (1957). On the dynamics of exploited fish populations. Fisheries Investigations, 19, 1-533.

Çalık, S., Erdoğan Sağlam, N. (2017). Length-weight relationships of demersal fish species caught by bottom trawl from Eastern Black Sea (Turkey). Cahiers de Biologie Marine, 58, 485-490.

Crețeanu, M., Papadopol, M.C. (2006). Population structure, nutrition, reproduction of Mesogobius batrachocephalus (Pallas, 1811) (Pisces, Gobiidae) (Preliminary Data). Cercetari Marine, INCDM, Constanta, 36, 319-340.

De Vlaming, V., Grossman, G., Chapman, F. (1982). On the use of the gonadosomatic index. Comparative Biochemistry and Physiology Part A: Physiology, 73(1), 31-39. https://doi.org/10.1016/0300-9629(82)90088-3

Demirhan, S.A., Can, M.F. (2007). Length-weight relationships for seven fish species from the southeastern Black Sea. Journal of Applied Ichthyology, 23(3), 282-283. https://doi.org/10.1111/j.1439-0426.2007.00835.x

Engin, S. (2008). Bio-ecological characteristic of some gobies Neogobius platyrostris (Pallas, 1814), Neogobius melanostomus (Pallas, 1814), Gobius paganellus Linnaeus, 1758 and Gobius cobitis Pallas, 1814 in the south eastern Black Sea rocky shore coastal ecosystem. PhD Thesis, Trabzon, Turkey: Karadeniz Technical University, 198 pp.

Freyhof, J. (2011). Diversity and distribution of freshwater gobies from the Mediterranean, the Black and Caspian Seas. The Biology of Gobies. Science Publishers, Enfield, NH, 279-288. https://doi.org/10.1201/b11397-19

Froese, R., Pauly, D. (2019). FishBase. Mesogobius batrachocephalus (Pallas, 1814). Accessed through: World Register of Marine Species at: http://www.marinespecies.org/aphia.php?p=taxdetails&id=126909 on 2019-02-15.

Gulland, J.A. (1969). Manual of methods for fish stock assessment. Part I. Fish population analysis. FAO Manuals in Fisheries Science, 4, 44.

Hartnoll, R.G. (1974). Variation in growth pattern between some secondary sexual characters in crabs (Decapoda, Brachyura). Crustaceana, 27,131-136. https://doi.org/10.1163/156854074X00334

Holden, M.J., Raitt, D.F.S. (eds) (1974). Manual of fisheries science. Part 2: Methods of resource investigation and their application. FAO Fishery Technology Paper 115 (Rev. 1), Rome, Italy.

Hôrková, K., Kovácˇ, V. (2014). Different life-histories of native and invasive Neogobius melanostomus and the possible role of phenotypic plasticity in the species' invasion success. Knowledge and Management of Aquatic Ecosystems, 412, 1-11. https://doi.org/10.1051/kmae/2013081

Keskin, C. (2012). A preliminary study on demersal fishes in the south-western Black Sea shelf (NW Turkey). Journal of Black Sea/Mediterranean Environment, 18(3), 341-349.

King, M. (1995). Fisheries Biology, Assessment and Management, Osney Mead, Oxford OX2 OEL, England. Kottelat, M., Freyhof, J. (2007). Handbook of European freshwater fishes. Publications Kottelat, Cornol and Freyhof, Berlin. 646 pp. ISBN: 978 2 8399 0298 4

Lavrincikova, M., Kovácˇ, V. (2007). Invasive round goby Neogobius melanostomus from the Danube mature at small size. Journal of Applied Ichthyology, 23, 276-278. https://doi.org/10.1111/j.1439-0426.2007.00851.x

Lowerre-Barbieri, S.K., Brown-Peterson, N.J., Murua, H., Tomkiewicz, J., Wyanski, D.M., Saborido-Rey, F. (2011). Emerging issues and methodological advances in fisheries reproductive biology. Marine and Coastal Fisheries, 3(1), 32-51. https://doi.org/10.1080/19425120.2011.555725

Mihălcescu, A.M. (2005). Studiul sitematic și ecologic al gobiidelor (Pisces, Gobiidae) din apele dobrogene. Teză de doctorat, Editura Universității Ovidius, Constanța.

Miller, P.J. (1986). Gobiidae. p. 1019-1085. In P.J.P. Whitehead, M.-L. Bauchot, J.-C. Hureau, J. Nielsen and E. Tortonese (eds.) Fishes of the North-eastern Atlantic and the Mediterranean. Volume 3. UNESCO, Paris.

Patzner, R.A., Van Tassell, J.L., Kovačić, M., Kapoor, B.G. (2011). The biology of gobies. Enfield, NH: Science Publishers; Boca Raton, FL: Distributed by CRC Press, 685 p. ISBN: 9781578084364 https://doi.org/10.1201/b11397

Pauly, D. (1980). On the interrelationships between natural mortality, growth parameters, and mean environmental temperature in 175 fish stocks. ICES Journal of Marine Science, 39(2), 175-192. https://doi.org/10.1093/icesjms/39.2.175

Pauly, D. (1984). Fish population dynamics in tropical water: a manual for use with programme calculators. ICLARM Studies and Reviews 8. 325 pp.

Pauly, D., Munro, J.L. (1984). Once more on the comparison of the growth in fish and invertebrates, ICLARM Fishbyte, 2(1), 21.

Pinchuk, V.I., Vasiľeva, E.D., Vasiľev, V.P., Miller, J.P. (2004). Mesogobius batrachocephalus (Pallas, 1814). In: The Freshwater fishes of Europe Vol. 8/II - Gobiidae 2, Miller J. P. (ed), pp. 109-131, AULA-Verlag, Wiebelsheim. 478 pp. ISBN: 9783891046692

Porumb, I. (1961). Contribuții la cunoașterea biologiei guvizilor (Gobius batrachocephalus, Gobius cephalarges și Gobius melanostomus) din dreptul litoralului românesc al Mării Negre (date preliminare). Hidrobiologia, 3, 271-282.

Ricker, W.E. (1975). Computation and interpretation of biology statistics of fish populations. Bulletin of the Fisheries Research Board of Canada, 191, 382.

Roşca, I., Mânzu, C.C. (2011). Feeding ecology of knout goby (Mesogobius batrachocephalus Pallas, 1814) from the Romanian Black Sea (Agigea-Eforie Nord area). Aquaculture, Aquarium, Conservation and Legislation, 4(2), 123- 129.

Roşca, I., Surugiu, V. (2010). Feeding Ecology of Some Benthic Fish Species From the Romanian Black Sea Coast (Agigea-Eforie Nord Area). Analele tiin ifice ale Universităii LVI.

Simpfendorfer, C.A., Bonfil, R., Latour, R.J. (2005). Mortality estimation. FAO Fisheries Technical Paper, 474, 127.

Sparre, P., Venema, S.C. (1992). Introduction to Tropical Fish Stock Assessment. Part I. Manual. FAO Fisheries Technical Paper No.306, 376p. ISBN: 9251039968

URL, 1. http://ribalkainfo.ru/stati-o-rybalke/riba-nashihvodoemov/46-bychok-knut-martovik.html

Yankova, M.H., Pavlov, D., Ivanova, P., Karpova, E., Boltachev, A., Öztürk, B., Bat, L., Oral, M., Mgeladze,M. (2014). Marine fishes in the Black Sea: recent conservation status. Mediterranean Marine Science, 15(2), 366-379. https://doi.org/10.12681/mms.700