Distribution of gelatinous Macrozooplankton in the southern Black sea during 1996 1999

Date

2001-01-01

Author

Kıdeyş, Ahmet Erkan

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In this study, spatial and temporal distributions of three gelatinous macrozooplankton, the scyphozoan Aurelia aurita and the ctenophores Pleurobrachia pileus and Mnemiopsis leidyi, were evaluated using the data obtained from seven southern Black Sea cruises carried out from 1996 to 1999. A comparison of nets used for the sampling of gelatinous macrozooplankton illustrated the superiority of the Hensen net with a larger mesh size (300 mum) over the Nansen net (112 mum). P. pileus was mainly concentrated below the mixed layer, while A. aurita and M. leidyi were generally confined to surface waters. Horizontally, P. pileus was associated with deep, offshore waters. P. pileus also displayed the least interannual variation of the three species. Biomass of A. aurita and M. leidyi varied substantially seasonally and inter-annually. In September 1999, the average biomass of M. leidyi was at its lowest level (12 g wet weight m(-2)) since its explosive development at the end of the 1980s. This was associated with the appearance of the new predatory ctenophore Beroe ovata, which appeared in the Black Sea at the end of the 1990s.

Subject Keywords

Biomass, Explosive, Temporal distribution, Mesh size, Mixed layer

URI

https://hdl.handle.net/11511/29972

Journal

Marine Biology

DOI

https://doi.org/10.1007/s002270100602

Collections

Graduate School of Marine Sciences, Article

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Citation Formats

A. E. Kıdeyş, “Distribution of gelatinous Macrozooplankton in the southern Black sea during 1996 1999,” Marine Biology, pp. 535–547, 2001, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/29972.