Academic Scientific JournalsPreliminary results on the ovarian histology of rabbitfish Siganus rivulatus (Forsskal, 1775) in the southern Aegean Sea, Turkey
Keywords:
fisheries management, Siganus rivulatus, ovary, histologyAbstract
The study aimed to determine the annual reproductive cycle of Siganus rivulatus females based on monthly variation of the gonadosomatic index (GSI) and histological changes in gonads. A total of 240 fish samples were collected monthly from small-scale (trammel nets) and recreational (angling and pot fishery) fishing from Gökova Bay, the southern Aegean Sea, between July 2017 and June 2018. The length and weight of female fish varied from 10.8 to 26.1 cm with a mean length of 18.7 ± 0.2 cm and from 14.98 to 293.42 g with a mean weight of 91.1 ± 2.93 g. GSI values began to increase in May, peaked in June and gradually decreased in July, indicating that the spawning season was early summer. A total of 240 gonads were histologically examined. Granular, pinkish structure of eggs was observed primarily between April and June, which was consistent with the increase in the gonadosomatic index. Post-spawning follicles were determined in July. Values of the gonadosomatic index gradually decreased after August and they were minimal between September and November. During this period, ovaries were surrounded by immature oocytes at the chromatin and peri-nucleolus stages. These results revealed that Siganus rivulatus started vitellogenesis in April and the gonadosomatic index peaked in June.
Downloads
References
Aksiray, F. (1954). Türkiye Deniz Balıkları ve Tayin Anahtarı (The Identification sheets for the Turkey’s marine fishes). Istanbul Üniv. Fen Fak. Hidrobiyoloji Arastırma Enstitüsü yayınları. Sayı 1: Pulhan Matbaası, Istanbul, 283 p.
Amin, E.M. (1985). Reproductive cycle of male Siganus rivulatus Forsskal with indication to gonosomatic and hepatosomatic indices. Bull. Inst. Oceanogr. Fish. Cairo 11: 149–164.
Amin, E.M. (1985). Seasonal development changes in the ovaries of Siganus rivulatus from the Red Sea. Bull. Inst. Oceanogr. Fish. Cairo 11: 131–147.
Bariche, M. (2005). Age and growth of Lessepsian rabbitfish from the eastern Mediterranean. Journal of Applied Ichthyology 21: 141–145.
Bancroft, J.D. & Stevens, A. (1996). Theory and practice of histological techniques. 4th edn, Churchill Livingstone, New York.
Ben-Tuvia, A. (1966). Red Sea fishes recently found in Mediterranean. Copeia 2: 254–275.
Ben-Tuvia, A. (1985). The impact of the Lessepsian (Suez Canal) fish migration on the eastern Mediterranean ecosystem. In M. Moraitou-Apostolopoulou & V. Kiortsis (Eds.), Mediterranean Marine Ecosystems (pp. 367–375). Plenum Press, New York,.
Bilecenoglu, M. & Kaya, M. (2002). Growth of marbled spinefoot, Siganus rivulatus, (Forsskål, 1775, Teleostei: Siganidae) introduced to Antalya Bay, eastern Mediterranean Sea (Turkey). Journal of the Fisheries Research 54(2): 279–285.
El-Far, A. (2008). Artisanal fisheries along Alexandria coast area with special reference to the fishery biology of Siganus spp. Unpublished M.Sc. dissertation. Department of Zoology, Faculty of Science, Zagazig University.
El-Gammal, F.I. (1988). Age, growth and mortality of the rabbitfish Siganus rivulatus (Forsk., 1775) from the Red Sea. Bulletin of the Institute of Oceanography and Fisheries 14: 13–21.
El-Ganainy, A.A. (2002). Assessment of the lizard fish Saurida undosquamis (Richardson) fishery in the Gulf of Suez, Red Sea. Bulletin of the Institute of Oceanography and Fisheries 28.
Fisheries and Aquaculture Software. (2019). FishStatJ – software for fishery statistical time series. FAO, Rome. Updated 21 July 2016,. Petrived February 12, 2019 from http://www.fao.org/fishery/statistics/software/fishstatj/en.
Froese, R. & Pauly, D. (Eds.). (2019). FishBase (version Feb 2018). In Y. Roskov, G. Ower, T. Orrell, D. Nicolson, N. Bailly et al. (Eds.) Species 2000 & ITIS Catalogue of Life, 2019 Annual Checklist. Species 2000: Naturalis, Leiden, the Netherlands.
Golani, D. (1990). Environmentally-induced meristic changes in Lessepsian fish migrants, a comparison of source and colonizing populations. Bulletin de 1’Ist. Ocean., Monaco, n. Special 7: 143–150.
Gunderson, D.R. (1993) Surveys of Fisheries Resources. John Wiley&Sons, Inc. N.Y. Hoque, M.M., Takemura, A. & Takano, K. (1998). Annual changes in oocyte development and serum vitellogenin level in the rabbitfish Siganus canaliculatus (Park) in Okinawa, Southern Japan. Fisheries Science 64: 44–45. DOI: 10.2331/fishsci.64.44.
Hussein, K.A. (1986). The use of minute embedded scales for age determination of Mediterranean Sea siganid Siganus rivulatus (Forsskal). Bulletin of the Institute of Oceanography and Fisheries Cairo 12: 187–198.
Luna, G.L. (1982). Manual of histologic staining methods. American Registry of Pathology, Mc Graw-Hill Co. NewYork. Mehanna, S.F., Abdallah, M. (2002). Population dynamics of the Rabbitfish Siganus rivulatus from the Egyptian sector of the Red Sea. J. King Abdulaziz University, Marine Science 13: 161–170.
Mohammed, N. (1991). Biological and biochemical studies of some siganid fishes from the Mediterranean waters off Alexandria. Unpublished M.Sc. dissertation, Faculty of Science, Alexandria University.
Rahman, M.S., Takemura, A. & Takano, K. (2000). Annual changes in ovarian histology, plasma steroid hormones and vitellogenin in the female golden rabbitfish, Siganus guttatus. Bull. Mar. Sci. 67: 729.
Ricker, W.E. (1975). Computation and Interpretation of biological statistics of fish populations. Bulletin of the Fisheries Research Board of Canada 191–382.
Salaki, M.S. (1993). Studies on gonadal reproductive and lunar spawning cycles of Siganus argenteus (Quoy et Gaimard), Siganidae. Unpublished M.Sc. dissertation. Dept. Mar. Sci., Univ. Ryukyus.
Soykan, O., Akgül, Ş.A. & Kınacıgil, H.T. (2016). Catch composition and some other aspects of bottom trawl fishery in Sığacık Bay, central Aegean Sea, eastern Mediterranean. Journal of Applied Ichthyology 32: 542–547. DOI: 10.1111/jai.13042.
Torcu, H. (1994). Indo Pacific-fish species distributed along the Southern Aegean sea and Mediterranean, and the studies on the biology and ecology of goatfish (Upeneus moluccensis (Bleeker, 1885)), lizardfish (Saurida undosquamis (Richardson,1848))). Selçuk Üniversitesi Fen Bil. Enst. Doktora Tezi. Konya.
Yeldan, H. & Avşar, D. (2000). A preliminary study on the reproduction of the rabbitfish (Siganus rivulatus (Forsskal, 1775)) in the Northeastern Mediterranean. Turkish Journal of Zoology 24(2): 173–182.
