The effect of irradiance on photosynthesis of the green form of the dinoflagellate Noctiluca scintillans was studied. Photosynthesis, measured in cells collected from the field and without the addition of prey, increased with irradiance to ca. 200 ng C cell–1 d–1 at an irradiance of ~250 to 300 μmol photons m–2 s–1. N. scintillans cells were observed to prey and grow actively on a number of dif...

The action potential which elicits luminescence in Noctiluca is recorded from the flotation vacuole as a transient all-or-none hyperpolarization in response to either local or general application of inward (bath to vacuole) current. Experiments were performed to determine whether the unorthodox polarities of both the stimulus current and the potential response resulted from uncommon bioelectric...

In the preceding paper the movements of the food-gathering tentacle of the marine dinoflagellate Noctiluca mtUaris were shown to be temporally related to spontaneous potential patterns in a manner which indicates that the potential changes are involved in the control of tentacle movements (Eckert & Sibaoka, 1967). The spontaneous potentials were therefore termed tentacle-regulating potentials (...

This manuscript presents four new observations of the jellyfish Mawia benovici in Adriatic Sea. species was recently identified as Pelagia by Piraino et al. (2014) and then placed genus Avian 2016. is rare almost exclusively observed Interestingly, majority refer to males only. Few studies have addressed issue sex determination Syphozoa particular, identity can only be determined at medusa stag...

1 UCDavis Genome Center, University of California—Davis, Davis, California, United States of America, 2 School of Biosciences, University of Birmingham, Birmingham, United Kingdom, 3 Georgia Aquarium Research Center, Atlanta, Georgia, United States of America, 4 California Sea Grant, La Jolla, California, United States of America, 5 Department of Ecology and Evolutionary Biology, Brown Universi...

The nomenclature of the purple-striped jelly® sh from southern California, currently known as Pelagia colorataRussell, 1964, is apparently in error. Our cladistic analysis of 20 characters for 15 pelagiid species indicates that P. colorata shares a common evolutionary history with members of the genus Chrysaora. There appears to be a number of characters shared among species of Chrysaora due to...