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The length and weight relationships and feeding ecology of knout goby, Mesogobius batrachocephalus (Pallas, 1814) from Southern Black Sea

Year 2020, Volume 37, Issue 4, 409 - 414, 15.12.2020
https://doi.org/10.12714/egejfas.37.4.12

Abstract

Among ecologically diverse gobies species, knout goby, Mesogobius batrachocephalus (Pallas, 1814), or previously known as Gobius batrachocephalus, is a Black Sea endemic species. There are studies on this species biological features along the Black Sea but there are only studies on its length and weight relationship along the Turkish coasts of the Black Sea. This study aims to contribute to the lack of knowledge on knout goby length and weight relationship and feeding ecology inhabiting Southern Black Sea. Total of 470 individual of knout goby was collected and it was previously reported that knout goby shows negative (-) allometry though within this study it was found that it only shows negative (-) allometry in spring and positive (+) allometry in other seasons. The diet was composed of crustaceans, teleost fishes and gastropods. According to the relative importance analysis, teleost fishes are the main food item for all and male individuals but for female crustaceans are the main food item. Trophic level results show that for all individuals trophic levels is 4.34, and when sexes are compared females have higher trophic level than males. While both sexes only consume teleost during summer, in other seasons females prefer more crustacean in their diet compared to males. Niche breadth index results indicated that when all individuals diet was compared among seasons in winter the niche breadth was the broader and summer was the narrower, in case of females the broader was fall and for males it was winter. In conclusion, feeding ecology of knout goby changes between seasons and sexes but general prey groups remain the same

References

  • Ak, O., Kutlu, S. & Aydın, İ. (2009). Length-weight relationship for 16 fish species from the Eastern black Sea, Turkey. Turkish Journal of Fisheries and Aquatic Sciences, 9, 125-128.
  • Aydın, M., Karadurmuş, U. & Mutlu, C. (2013). The Crab Species of the Middle and East Black Sea (Turkey). The Black Sea Journal of Sciences. 3(9), 1-16.
  • Çalık, S., & Erdoğan Sağlam, N. (2017). Length-weight relationships of demersal fish species caught by bottom trawl from Eastern Black Sea (Turkey). Cah. Biol. Mar, 58, 485-490.
  • 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. DOI: 10.1111/j.1439-0426.2007.00835.x
  • Fischer, W., Schneider, M. & Bauchot M.L. (1987). Méditerranée et Mer Noire (Zone de Pêche 37). Fiches FAO d'identification des espèces pour les besoins de la pêche. Volume 1, 1530 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. DOI: 10.1201/b11397-19
  • Froese, R. & D. Pauly. Editors. (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
  • Karachle, P.K. & Stergiou, K.I. (2012). Morphometrics and allometry in fishes. In Morphometrics. InTech.
  • Kohler, N.E., Casey, J.G. &Turner, P.A. (1996). Length-Length and Length-Weight Relationships for 13 Shark Species from the Western North Atlantic. NOAA Technical Memorandum NMFS-NE-110, 22 p.
  • Krebs, J. & Charles (2009) Ecological methodology, 2nd edn. Addison Wesley Longman, New York
  • Pauly, D., Froese, R. & Sala, P.S. (2000) Trophlab manual. In: ICLARM. Manila, Philippines,
  • 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 & Legislation, 4(2), 123-129.
  • Schneider, J.C., Laarman, P.W. & Gowing, H. (2000), “Length-weight relationships”, In Schneider, JC. (Ed.). Manual of fisheries survey methods II: with periodic updates. Michigan Department of Natural Resources, Fisheries Special Report 25, Ann Arbor. Hyslop EJ (1980) Stomach contents analysis-a review of methods and their application. J Fish Biol 17, 411–429.
  • Smith, E.P. (1982) Nische Breadth Resource Availability, and Inference. Ecology 63:1675–1681. DOI: 10.2307/1940109
  • Wootton, R.J. (1990). Ecology of Teleost Fishes. Chapmam & Hall, London (pp. 404-pp). ISBN 0-412-31730-3.
  • Zar, J.H. 1996. Biostatistical Analysis, 3rd ed. Prentice-hall: Englewood Cliffs, NJ. 662 pp.

Güney Karadeniz’den kayabalığı Mesogobius batrachocephalus (Pallas, 1814) türünün boy-ağırlık ilişkileri ve beslenme ekolojisi

Year 2020, Volume 37, Issue 4, 409 - 414, 15.12.2020
https://doi.org/10.12714/egejfas.37.4.12

Abstract

Ekolojik olarak çok çeşitlilik gösteren kayabalığı türlerinden, daha önce Gobius batrachocephalus olarak bilinen kayabalığı Mesogobius batrachocephalus (Pallas, 1814) türü Karadeniz endemiği bir türdür. Karadeniz’de türün biyolojik özellikleri üzerine çalışmalar bulunmasına karşın Karadeniz’in Türkiye kıyılarından sadece boy-ağırlık ilişkilerine dair çalışmalar bulunmaktadır. Bu çalışma Karadeniz’de türün boy-ağırlık ilişkisi ve beslenme ekolojisi üzerine olan bilgi eksikliğine katkı sağlamayı hedelemektedir. Toplamda 470 birey toplanmış olup daha önce negatif (-) allometri gösterdiği rapor edilmiş olan kayabalığının bu çalışmada bahar döneminde negatif (-) ve diğer mevsimlerde positif (+) allometri gösterdiği tespit edilmiştir. Besinini krustaseler, teleost balıklar ve
gastropodlar oluşturmaktadır. Göreceli önemlilik indeksi analizine göre tüm bireyler ve erkekler için teleost balıklar ve dişiler için krustaseler ana besin grubunu oluşturmaktadır. Tüm bireyler için trofik seviye 4.34 bulunmuş olup dişilerin erkeklerden daha yüksek trofik seviyeye sahip olduğu gözlemlenmiştir. Yazın her iki cinsiyette sadece teleost balıkları tercih etmelerine karşın diğer mevsimlerde dişiler erkeklerden daha çok krustaseleri tercih etmektedir. Niş genişliği indeks sonuçlarına göre mevsimler karşılaştırıldığında kışın en geniş ve yazın en dar olduğu, dişilerin sonbaharda ve erkeklerin kışın en geniş sonuçlara sahip olduğu bulunmuştur. Sonuç olarak, türün beslenme ekolojisi mevsimsel ve eşeyler arası değişiklik göstermekte ama genel besin grupları aynı kalmaktadır. 

References

  • Ak, O., Kutlu, S. & Aydın, İ. (2009). Length-weight relationship for 16 fish species from the Eastern black Sea, Turkey. Turkish Journal of Fisheries and Aquatic Sciences, 9, 125-128.
  • Aydın, M., Karadurmuş, U. & Mutlu, C. (2013). The Crab Species of the Middle and East Black Sea (Turkey). The Black Sea Journal of Sciences. 3(9), 1-16.
  • Çalık, S., & Erdoğan Sağlam, N. (2017). Length-weight relationships of demersal fish species caught by bottom trawl from Eastern Black Sea (Turkey). Cah. Biol. Mar, 58, 485-490.
  • 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. DOI: 10.1111/j.1439-0426.2007.00835.x
  • Fischer, W., Schneider, M. & Bauchot M.L. (1987). Méditerranée et Mer Noire (Zone de Pêche 37). Fiches FAO d'identification des espèces pour les besoins de la pêche. Volume 1, 1530 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. DOI: 10.1201/b11397-19
  • Froese, R. & D. Pauly. Editors. (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
  • Karachle, P.K. & Stergiou, K.I. (2012). Morphometrics and allometry in fishes. In Morphometrics. InTech.
  • Kohler, N.E., Casey, J.G. &Turner, P.A. (1996). Length-Length and Length-Weight Relationships for 13 Shark Species from the Western North Atlantic. NOAA Technical Memorandum NMFS-NE-110, 22 p.
  • Krebs, J. & Charles (2009) Ecological methodology, 2nd edn. Addison Wesley Longman, New York
  • Pauly, D., Froese, R. & Sala, P.S. (2000) Trophlab manual. In: ICLARM. Manila, Philippines,
  • 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 & Legislation, 4(2), 123-129.
  • Schneider, J.C., Laarman, P.W. & Gowing, H. (2000), “Length-weight relationships”, In Schneider, JC. (Ed.). Manual of fisheries survey methods II: with periodic updates. Michigan Department of Natural Resources, Fisheries Special Report 25, Ann Arbor. Hyslop EJ (1980) Stomach contents analysis-a review of methods and their application. J Fish Biol 17, 411–429.
  • Smith, E.P. (1982) Nische Breadth Resource Availability, and Inference. Ecology 63:1675–1681. DOI: 10.2307/1940109
  • Wootton, R.J. (1990). Ecology of Teleost Fishes. Chapmam & Hall, London (pp. 404-pp). ISBN 0-412-31730-3.
  • Zar, J.H. 1996. Biostatistical Analysis, 3rd ed. Prentice-hall: Englewood Cliffs, NJ. 662 pp.

Details

Primary Language English
Subjects Marine and Freshwater Biology
Journal Section Articles
Authors

Elizabeth Grace Tunka BENGİL (Primary Author)
GIRNE AMERICAN UNIVERSITY
0000-0002-0071-3786
Türkiye


Mehmet AYDIN
ORDU UNIVERSITY, FATSA FACULTY OF MARITIME SCIENCES, DEPARTMENT OF FISHERIES TECHNOLOGY ENGINEERING, DEPARTMENT OF FISHERY MANAGEMENT
0000-0003-1163-6461
Türkiye

Supporting Institution Ordu University
Project Number Project No. AP-1735
Thanks This study was supported by Ordu University Research Fund Project No. AP-1735.
Publication Date December 15, 2020
Application Date April 9, 2020
Acceptance Date June 26, 2020
Published in Issue Year 2020, Volume 37, Issue 4

Cite

APA Bengil, E. G. T. & Aydın, M. (2020). The length and weight relationships 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 . DOI: 10.12714/egejfas.37.4.12