Mucilage Problem in the Sea of Marmara

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DOI :10.26650/B/LS32.2023.003.04   IUP :10.26650/B/LS32.2023.003.04    Full Text (PDF)

Effect of Mucilage on Fish Health

Tülay Akaylı, Çiğdem Ürküş

Marine mucilage has been widely seen in the Mediterranean in recent years; is a natural phenomenon, also called sea slime, sea slobber, and polluted sea phenomenon. Today; The significant increase in the amount of mucilage in the seas has become a worldwide public health, economic and environmental problem. There are various phytoplankton, colloidal components, and various microorganisms (various prokaryotes such as bacteria, and viruses) in the structure of mucilage. The mucilage layer covers the water's surface; Since it significantly blocks the sunlight reaching the marine ecosystems, it covers the gills of the sea creatures living under this layer, cutting off the oxygen and causing their death. In addition, opportunistic human pathogens in seawater as well as other environmental microorganisms can develop in the mucilage layer. This study was carried out to investigate the effect on the health of some pelagic marine fish species caught by angling of mucilage mass, which was seen intensely in Istanbul in June 2021. Live fish samples used in the study were obtained from 4 different regions. Parasitological, bacteriological, and histopathological examination methods were applied to various fish species such as mullet (Mugil cephalus), bluefish (Pomatomus saltatrix), horse mackerel (Trachurus trachurus), and anchovy (Engraulis encrasicolus) in the laboratories of our faculty. In addition, bacteriological cultivations were made from mucilage samples taken from seawater. While no clinical findings were observed in all fish samples examined, the presence of thin mucilage layers in the wet preparations prepared from the gills and skin of these fish was noted. However, some differences were noted in the internal examination of the autopsied fish samples. Isolates of different Vibrio and Pseudomonas species were obtained as a result of bacteriological cultivation from the liver samples. According to the data from this study, it has been determined that marine fish were stressed because of mucilage and that the gill and liver tissues of these fish were most affected. It has also been determined that the isolated bacterial species were not pathogenic to humans and consisted of bacteria species that could be found in the typical flora of seawater and fish. In addition, in this study, Vibrio diazotrophicus species, which is commonly found in the marine environment and whose nitrogen-fixing ability was detected, was isolated and identified for the first time in mucilage-containing water samples.


Keywords: Mucilage, Fish, Gill, Liver, Bacteria

References

  • Allen, S.A., Bertilsson, S. & Goedkoop, W. (2005). Factors Determining Distribution and Abundance of Pathogenic Bacteria, with a Focus on Vibrio spp. Available online: https://www.ibg.uu.se/digitalAssets/90/ a_90474-f_ Allen-Anna-Sophie-arbete.pdf. google scholar
  • Aktan, Y., Dede A. & Çiftci P.S (2008). Mucilage event associated with diatoms and dinoflagellates in Sea of Marmara, Turkey. Harmful Algae News, 36,1-3. Available online: https://www.researchgate.net/ publication/284430858. google scholar
  • Austin, B. & Austin, D.A. (2016). Bacterial fish pathogens: disease of farmed and wild fish. London, United Kingdom: Springer International Publishing. google scholar
  • Baker-Austin, C., Oliver, J. D., Alam, M., Ali, A., Waldor, M. K., Qadri, F., Martinez-Urtaza, J. (2018). Vibrio spp. infections. Nature Reviews Disease Primers, 4(1), 1-19. https://doi.org/10.1038/s41572-018-0005-8. google scholar
  • Balkıs-Ozdelıce, N., Durmuş T. & Balcı, M. A. (2021). Preliminary Study on the Intense Pelagic and Benthic Mucilage Phenomenon Observed in the Sea of Marmara. International Journal of Environment and Geoinformatics, 8(4), 414-422. https://doi.org/10.30897/ijegeo.954787 google scholar
  • Berthe, F. C., Michel, C. & Bernardet, J. F. (1995). Identification of Pseudomonas anguilliseptica isolated from several fish species in France. Diseases of Aquatic Organisms, 21(2), 151-155. https://doi.org/10.3354/ dao021151 google scholar
  • Buller N.B. (2004). Bacteria from fish and other aquatic animals: a practical identification manual. Western Australia, Australia: CABI. google scholar
  • Bullock, G. L. (1990). Bacterial gill disease of freshwater fishes (Vol. 84). US Department of the Interior, Fish and Wildlife Service, Division of Fisheries and Wetlands Research. Available online: https://digitalcommons. unl.edu/cgi/viewcontent.cgi?article=1129&context=usfwspubs google scholar
  • Cerdag-Cuéllar, M., Rossello-Mora, R. A., Lalucat, J., Jofre, J. & Blanch, A. (1997). Vibrio scophthalmi sp. nov., a new species from turbot (Scophthalmus maximus). International Journal of Systematic and Evolutionary Microbiology, 47(1), 58-61. https://doi.org/10.1099/00207713-47-1-58 google scholar
  • Colwell, R. R. & Grimes, D. J. (1984). Vibrio diseases of marine fish populations. Helgoländer Meeresuntersuchungen, 37(1), 265-287. Available online: https://link.springer.com/content/pdf/10.1007/ BF01989311.pdf. google scholar
  • Criminger, J. D., Hazen, T. H. Sobecky, P. A. & Lovell, C. R. (2007). Nitrogen Fixation by Vibrio parahaemolyticus and Its Implications for a New Ecological Niche. Applied and Environmental Microbiology, 3(1), 59595961. https://doi.org/10.1128/AEM.00981-07 google scholar
  • Culling, C.F.A. (1963) Handbook of histopathological techniques (including museum technique). London, Butterworths: Butterword & Co.(Publihers) Ltd. google scholar
  • Danovaro, R., Umani,S.F. & Pusceddu, S.A. (2009). Climate change and the potential spreading of marine mucilage and microbial pathogens in the Mediterranean Sea. PLoS ONE, 4 (9). Available online: https:// journals.plos.org/plosone/article?id=10.1371/journal.pone.0007006. google scholar
  • Del Negro, P., Crevatin, E., Larato, C., Ferrari, C., Totti, C., Pompei, M., ... & Umani, S. F. (2005). Mucilage microcosms. Science of the Total Environment, 353(1-3), 258-269. https://doi.org/10.1016/j. scitotenv.2005.09.018. google scholar
  • Deng, H., He Ch., Zhou, Z, Liu, Ch., Tan, K., Wang, N., Jiang, B., Gao, X.... Liu, W., (2009). Isolation and pathogenicity of pathogens from skin ulceration disease and viscera ejection syndrome of the sea cucumber Apostichopus japonicus. Aquaculture, 287:18-21. https://doi.org/10.1016/j.aquaculture.2008.10.015 google scholar
  • Derome, N., Gauthier, J., Boutin, S., & Llewellyn, M. (2016). Bacterial opportunistic pathogens of fish. In Christon J. Hurst (Eds.), The Rasputin Effect: When Commensals and Symbionts Become ParasiticAdvances in Environmental Microbiology (pp. 81-108). Springer, Cham. https://doi.org/10.1007/978-3-319-28170-4_4. google scholar
  • Dutta H.M. (1996). A composite approach for evaluation of the effects of pesticides on fish. In J.S.D. Munshi and H.M. Dutta (Eds), Fish Morphology (pp. 145-180). Science Publishers Inc. google scholar
  • Dutta H.M., Adhikari, N. K., Singh, P.K. & Munshi, J.S. (1993). Histopathological changes induced by malathion in the liver of a freshwater catfish, Heteropneustes fossilis (Bloch). Bulletin of Environmental Contamination and Toxicology, 51, 895-900. https://doi.org/10.1007/BF00198287 google scholar
  • Ergul, A.H., Balkis-Ozdelice, N., Merve Koral, M., Aksan, S., Durmus, T., Kaya,M., Kayal, M., Ekmekci, F., Oltan Canli, O. (2021). The early stage of mucilage formation in the Marmara Sea during spring. Jornal of Black Sea/Mediterranean Environment. 27(2), 232-257. Available online: https://blackmeditjournal.org/ wp-content/uploads/8-2021-2_232-257.pdf google scholar
  • Guerinot, M. L., West, P. A., Lee, J. V. & Colwell, R. R. (1982). Vibrio diazotrophicus sp. nov., a Marine Nitrogen-Fixing Bacterium. International Journal of Systematic Bacteriology, 32(3), 350-357. https://doi. org/10.1099/00207713-32-3-350 google scholar
  • Guisande, J.A., Montes, M., Farto, R., Armada, S.P., Pérez, M.J.& Nieto, T.P. (2004). A set of tests for the phenotypic identification of culturable bacteria associated with Galician bivalve mollusc production. Journal of Shellfish Research, 23, 599-609. Available online: https://go.gale.com/ps/i. google scholar


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