Zooplankton community state in the NortheasternMarmara Sea during early autumn with comments onmass mortality of the Black Sea species due to thesalinity gradient

Year 2006, Volume: 12 Issue: 3, 213 - 231, 01.12.2006

Leonid Svetlichny Elena Hubareva Ahmet Kideys Aleksandra Shmeleva

https://izlik.org/JA83KL44TR

Abstract

Abstract In October 2005 species composition and abundance of mesozooplankton collected in the Black Sea (near the entrance of the Bosphorus) and in the Marmara Sea (near the exit of the Bosphorus and Prince Islands) were studied taking into account the number of live and dead individuals. Along the Bosphorus, the numbers of the Black Sea originated Copepoda species reduced whilst the abundance of Cladocera and Oikopleura dioica increased towards the Marmara. The Black Sea species constituting 78% of total fodder zooplankton abundance in the Marmara Sea aggregated mainly in the subsurface layers with lower salinity. In the layers deeper than salinity gradient (25-50 m) 57% of the individuals from these taxa were deadbeing at different stages of decomposition. Respiration rates of copepods also differed among layers of distinct salinity.

Keywords

Key words: Zooplankton , Calanus euxinus , vertical migration , Marmara Sea

References

• Anraku, M. (1964). Influence of the Cape Cod Canal on the hydrography and on the copepods in Buzzards Bay and Cape Cod Bay, Massachusetts. II. Respiration and feeding. Limnol.Oceanogr. 9: 195-206.
• Besiktepe, S.T., Sur, H.I., Ozsoy, E., Latif, M.A., Oguz, T., Unluata, U. (1994). The circulation and hydrography of the Marmara Sea. Progress in Oceanography 34: 285-334.
• Cervetto, G., Pagano, M., Gaudy, R. (1995). Adaptation aux variations de la salinite chez le copepode Acartia clausi. J. Rech. Oceanogr. 20: 42-49.
• Conover, R.J. (1956). Oceanography of Long Island Sound, 1952-1954. VI. Biology of Acartia clausi and A. tonsa. Bull. Bingham Oceanogr. Coll. 15: 156-233.
• Gubanova, A. (2000). Occurrence of Acartia tonsa Dana in the Black Sea. Was it introduced from the Mediterranean?. Mediterranean Marine Science 1/1: 105-109.
• Kocatas, A., Koray, T., Kaya, M., Kara, O. F. (1993). Review of the fishery resources and their environment in the Sea of Marmara. Studies and Reviews, General Fisheries Council for the Mediterranean (GFCM), FAO 64: 87-143.
• Lee, C.E. (1999). Rapid and repeated invasions of fresh water by the saltwater copepod Eurytemora affinis. Evolution 53: 1423-1434.
• Lee, C.E., Petersen, C.H. (2002). Effects of developmental acclimation on adult salinity tolerance in the freshwater-invading copepod Eurytemora affinis. Physiological and Biochemical Zoology 76: 296-301.
• Riccardi, N., Mariotto, L. (2000). Seasonal variations in copepod body length: a comparison between different species in the Lagoon of Venice. Aquatic Ecology 34: 243-252.
• Svetlichny, L. S. (1983). Calculation of the biomass of planktonic copepods using the coefficients of proportionality between volume and linear dimensions of the body. Ecologia Morya 15: 46-58 (in Russian).
• Svetlichny, L. S., Hubareva, E. S. (2005). The energetics of Calanus euxinus: locomotion, filtration of food and specific dynamic action. J. Plankton Res. 27: 671-682.
• Svetlichny, L.S., Kideys, A.E., Hubareva, E.S., Besiktepe, S., Isinibilir, M. (2006). Development and lipid storage in Calanus euxinus from the Black and Marmara seas: variabilities due to habitat conditions. J. Mar. Syst. 59: 52-62.
• Tarkan, A.N., Erguven, H. (1988). The main copepod species of Marmara Sea. J. Aquatic Products 2: 71-84.
• Tarkan, A.N., Isinibilir, M., Tarkan, A.S. (2005). Seasonal variations of the zooplankton composition and abundance in the Istanbul Strait. Pakistan J. Biological Sciences 8: 1327-1336.
• Zajaczkowski, M., Legezynska, J. (2001). Estimation of zooplankton mortality caused by an Arctic glacier outflow. Oceanologia 43: 341-351.