Akın Türker İLKYAZ, GÜLNUR METİN, OZAN SOYKAN, HASAN TUNCAY KINACIGİL

Spawning Season, First Maturity Length and Age of 21 Fish Species from the Central Aegean Sea, Turkey

The aim of this study was to determine the spawning season and length and ages at first maturity lengths of demersalfish species in the central Aegean Sea. Fish samples were collected by bottom trawling in İzmir Bay. Sampling was carriedout at monthly intervals over a three-year period. The sample size of 21 species was sufficient to estimate their spawningperiod and length at first maturity. These species were Arnoglossus laterna, A. thori, Blennius ocellaris, Boops boops,Buglossidium luteum, Cepola macrophthalma, Citharus linguatula, Deltentosteus quadrimaculatus, Dentex macrophthalmus,Diplodus annularis, D. vulgaris, Gobius niger, Lepidotrigla cavillone, Merluccius merluccius, Mullus barbatus barbatus,Pagellus acarne, P. erythrinus, Serranus cabrilla, S. hepatus, Spicara maena and Trisopterus minutus. It was determined thatthe current prohibited season protects only 47.1% of these during peak spawning periods and that some commercial species’spawning periods are not covered by recent closed seasons. Although it was determined that a total of 13 species were fishtargeted by artisanal fisheries, there are only four minimum landing size regulations in place for them. Therefore, for the studyarea we recommend a new prohibited season for fisheries carrying out bottom trawling as well as minimum landing sizes.

PDF

___

Darwin, C. (1871). The Descent of Man, and Selection in Relation to Sex, Vol: 2. New York, USA, D. Appleton and Company, 436 pp.

Fischer, W., Schneider, M. & Bauchot, M.L. (1987). Fishes FAO D’inentification des Especes Pour Les Besoines de la Pêche. Méditerranée et Mer Noire, Zon de Pêche 37, Rev. 1, Vol. II, Vertèbres. Rome, Italy, FAO, 761- 1529 pp.

Froese, R. & Pauly, D. (2017). FishBase. Retrieved from http://www.fishbase.org

Ghiselin, M.T. (1974). The Economy of Nature and the Evolution of Sex. California, USA, University of California Press, 346 pp.

Gunderson, D.R. (1993). Surveys of Fisheries Resources. New York, USA, John Wiley, 248 pp.

İlkyaz A.T., Metin, C. & Kınacıgil, H.T. (1998). A Computer Program About the Calculation of the Selectivity Parameters in Towed Fishing Gear Illustrated with Cover Cod-End Method (L50 Version: 1.0.0). Journal of Fisheries and Aquatic Sciences, 15(3-4), 305-314.

İlkyaz, A.T., Metin, G., Soykan, O. & Kınacıgil, H.T. (2010a). Age, Growth and Sexual Development of Solenette, Buglossidium luteum (Risso, 1810), in the Central Aegean Sea. Journal of Applied Ichthyology, 26(3), 436-440. http://dx.doi.org/ 10.1111/j.1439-0426.2009.01382.x

İlkyaz, A.T., Metin, G., Soykan, O. & Kınacıgil, H.T. (2010b). Growth and Reproduction of Large-Scaled Gurnard (Lepidotrigla cavillone Lacepède, 1801) (Triglidae) in the Central Aegean Sea, Eastern Mediterranean. Turkish Journal of Zoology, 34(4), 471-478. http://dx.doi.org/10.3906/zoo-0906-47

İlkyaz, A.T., Metin, G., Soykan, O. & Kınacıgil, H.T. (2017). Age, Growth and Reproduction of Mediterranean Scaldfish Arnoglossus laterna (Walbaum, 1792) in the East-Central Aegean Sea. Acta Ichthyologica et Piscatoria, 47(1), 53-61. http://dx.doi.org/10.3750/AIEP/02051

King, M. (2007). Fisheries Biology, Assessment and Management, 2nd ed. Oxford, UK, Blackwell Publishing, 382 pp. http://dx.doi.org/10.1002/9781118688038

Metin, G. & Kınacıgil, H.T. (2001). The Sectioning Technique in Age Determination by Otolith. Journal of Fisheries and Aquatic Sciences, 18(1), 271-277.

Metin, G., İlkyaz A.T., Soykan, O. & Kınacıgil, H.T. (2011a). Age, Growth and Reproduction of Four- Spotted Goby, Deltentosteus quadrimaculatus (Valenciennes, 1837), in İzmir Bay (Central Aegean Sea). Turkish Journal of Zoology, 35(5), 711-716. http://dx.doi.org/10.3906/zoo-1001-32

Metin, G., İlkyaz, A.T., Soykan, O. & Kınacıgil, H.T. (2011b). Biological Characteristics of the Common Pandora, Pagellus erythrinus (Linnaeus, 1758), in the Central Aegean Sea. Turkish Journal of Zoology, 35(3), 307-315. http://dx.doi.org/10.3906/zoo-0904-4

MFALT (2016). Fisheries Regulation for Marine and Fresh Waters for Commercial Fishery, 2016-2020 Fishing Period No: 4/1. Ankara, Turkey, Ministry of Food, Agriculture and Livestock of Turkey, Protect and Control General Office, 85 pp.

Mitcheson, Y.S. & Liu, M. (2008). Functional Hermaphroditism in Teleosts. Fish and Fisheries, 9(1): 1-43.

Ricker, W.E. (1975). Computation and Interpretation of Biological Statistics of Fish Populations, Bulletin of the Fisheries Research Board of Canada 191, Ottawa, Canada, Information Canada Bookshops, 382 pp.

Samy-Kamal, M., Forcada, A. & Lizaso, J.L.S. (2015). Effects of Seasonal Closures in a Multi-Specific Fishery. Fisheries Research, 172, 303-317. http://dx.doi.org/10.1016/j.fishres.2015.07.027

Shine, R. (1989). Ecological Causes for the Evolution of Sexual Dimorphism: A Review of the Evidence. Quarterly Review of Biology, 64(4), 419-461.

Soykan, O., İlkyaz, A.T., Metin, G. & Kınacıgil, H.T. (2010). Growth and Reproduction of Blotched Picarel (Spicara maena Linnaeus, 1758) in the Central Aegean Sea, Turkey. Turkish Journal of Zoology, 34(4), 453-459. http://dx.doi.org/10.3906/zoo-0903-29

Soykan, O., İlkyaz, A.T., Metin, G. & Kınacıgil, H.T. (2013). Growth and Reproduction of Brown Comber (Serranus hepatus Linnaeus, 1758) in the Central Aegean Sea, Turkey. Turkish Journal of Zoology, 37(2), 211-217. http://dx.doi.org/10.3906/zoo-1203-34

Soykan, O., İlkyaz, A.T., Metin, G. & Kınacıgil, H.T. (2015a). Age, Growth and Reproduction of European Hake (Merluccius merluccius (Linn., 1758)) in the Central Aegean Sea, Turkey. Journal of the Marine Biological Association of the United Kingdom, 95(4), 829-837. http://dx.doi.org/10.1017/S002531541400201X

Soykan, O., İlkyaz, A.T., Metin, G. & Kınacıgil, H.T. (2015b). Growth and Reproduction of Boops boops, Dentex macrophthalmus, Diplodus vulgaris, and Pagellus acarne (Actinopterygii: Perciformes: Sparidae) from East-Central Aegean Sea, Turkey. Acta Ichthyologica et Piscatoria, 45(1), 39-55. http://dx.doi.org/10.3750/AIP2015.45.1.05

Trippel, E.A. & Harvey, H.H. (1991). Comparison of Methods Used to Estimate Age and Length of Fishes at Sexual Maturity Using Populations of White Sucker (Catostomus commersoni). Canadian Journal of Fisheries and Aquatic Sciences, 48(8), 1446-1459. http://dx.doi.org/10.1139/f91-172

TUIK (2014). Fishery Statistics 2013. Ankara, Turkey, Turkish Statistical Institute Publication, 61 pp.