Observations on the bloom-forming jellyfish Crambionella stuhlmanni (Chun, 1896) in the St Lucia Estuary, South Africa

R. Perissinotto, R. H. Taylor, N. K. Carrasco, C. Fox

Abstract


Opportunistic observations made in the St Lucia estuarine lake, mainly during the period 1991 to 2000, show that the rhizostomatid scyphozoan Crambionella stuhlmanni often forms aggregations with densities in excess of 1 ind.m-3. Its salinity tolerance varies in the range of 12–65 ‰, with the highest jellyfish con­centrations often observed at hypersaline levels of 40–65 ‰. Considering that the species has persisted in the system under the present closed mouth conditions, it is suggested that it is capable of completing its life cycle within the estuarine lake. Its role in the ecosystem needs to be investigated, with emphasis on its po­tential ability to remove suspended sediment particles from the water-column.

 

To cite this paper: Perissinotto, R., Taylor, R.H., Carrasco, N.K. & Fox, C. 2013. Observations on the bloom-forming jellyfish Crambionella stuhlmanni (Chun, 1896) in the St Lucia Estuary, South Africa. African Invertebrates 54 (1): 161–170.

Published electronically: 14 May 2013
urn:lsid:zoobank.org:pub:5DBDA81A-AF55-4589-A19E-27BA7449CA26


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