Master Thesis / Master students with fieldwork at RSEC
Beziehung zwischen der Schwebegarnele Idiomysis tsurnamali und Coelenteraten im Roten Meer
Gerlinde Aichinger - Masterarbeit - 2010 - Universität Salzburg
The mysid Idiomysis tsurnamali was found hovering over the jellyfish Cassiopeia andromeda, the anemone Megalactis griffithsi and Cerianthus sp.. During the observations a new species of the genus Idiomysis was found between the stings of the sea urchin Diadema setosum. This new species, temporarily called Idiomysis sp. A, is going to be described. Some of the collected specimens were observed under the scanning electron microscopy. The correlation between the size of C. andromeda and the size of the mysid swarm could be demonstrated, as well as the correlation between the size of the jellyfish and the distance the swarm was hovering above its host as well as the distance the individuals of a mysid swarm were keeping among themselves. Furthermore the behavior of the swarm during the approach of a potential enemy and the return behavior after the dislocation of the swarm were observed. Because of the swarm-behaviour during the night, it is assumed that the mysid I. tsurnamali does not have any protection against the nematocysts of its host.
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