Results 141 to 150 of about 468 (168)
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Ephyra jellyfish as a new model for ecotoxicological bioassays
Marine Environmental Research, 2014The aim of this study was a preliminary investigation on the possibility of using the ephyra of Scyphozoan jellyfish Aurelia aurita (Linnaeus, 1758), the common moon jellyfish, as an innovative model organism in marine ecotoxicology. A series of sequential experiments have been carried out in laboratory in order to investigate the influence of ...
Marco Faimali +2 more
exaly +6 more sources
The morphogenesis of ephyra in Coronatae (Cnidaria, Scyphozoa)
Marine Biology, 2007The morphogenesis of ephyrae of Atorella vanhoeffeni Bigelow, 1909 (Werner, 1967) and of Nausithoe maculata Jarms, 1990 during strobilation is described. We found differences in the developmental pattern of marginal structures and structural changes of longitudinal muscle tubes in particular.
Gerhard Jarms, Jarms Gerhard
exaly +2 more sources
Marine Biology, 1983
The development of Pelagia noctiluca (F\(\mathop o\limits^o\)rskal) larvae, obtained from fertilization in aquarium, has been observed and recorded from the stage of planula to the stage of ephyra of 1.4 mm in diameter. Nine developmental stages are described, corresponding to the variation in the general morphology, in the morphology of the ...
M Avian
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The development of Pelagia noctiluca (F\(\mathop o\limits^o\)rskal) larvae, obtained from fertilization in aquarium, has been observed and recorded from the stage of planula to the stage of ephyra of 1.4 mm in diameter. Nine developmental stages are described, corresponding to the variation in the general morphology, in the morphology of the ...
M Avian
exaly +3 more sources
The Nervous System of the Ephyra Larva of Aurellia aurita
Journal of Cell Science, 1956 ABSTRACT The rapid co-ordination of the beat had been identified with a specialized system of neurones which spreads over the muscles from the marginal ganglia. By analogy with other invertebrates this has been called the giant fibre system. The feeding response and the spasm are co-ordinated by a separate net, called ‘the
exaly +2 more sources
Graviceptor development in jellyfish ephyrae in space and on earth
Advances in Space Research, 1994Graviceptor (rhopalium) development in Aurelia aurita ephyrae which developed on Earth and in space during the nine-day NASA SLS-1 mission was compared. The space-developed ephyrae made graviceptors which were morphologically similar to those of their ground-based controls.
D B, Spangenberg +3 more
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Rhopalium development in Aurelia aurita ephyrae
Hydrobiologia, 1991Rhopalia of developing ephyrae were examined using the SEM and TEM at 24 h intervals following strobilation induction. Kinocilia are shorter in the ephyra stage than in polyps. A few ephyra-type kinocilia are found in rhopalia as early as 24 h after induction, before a distinct rhopalium is seen.
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Effect of neurotoxic compounds on ephyrae of Aurelia aurita jellyfish
Hydrobiologia, 2015The aim of this study was to analyze the toxicity of two neurotoxic compounds on the ephyra stage of the Scyphozoan jellyfish Aurelia aurita, an innovative and sensitive model organism recently proposed in ecotoxicological bioassays. Indeed, jellyfish play an important role in the marine ecosystem, being a key component of the gelatinous zooplankton ...
Costa E +9 more
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Mechanics of prey selection by ephyrae of the scyphomedusa Aurelia aurita
Marine Biology, 1997In situ feeding patterns of ephyrae of the jellyfish Aurelia aurita (Linnaeus) revealed the importance of relatively large (>1 mm) prey in the diet of these scyphozoan predators. These studies were carried out in Narragansett Bay, Rhode Island, USA in March and April, from 1993 through 1996.
B. K. Sullivan +2 more
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First record of wild ephyrae of the giant jellyfish Nemopilema nomurai
Fisheries Science, 2012To understand the causes and to control harmful blooms of the giant Nomura’s jellyfish Nemopilema nomurai, it is essential to study the seed population (benthic polyps) and its environment. To locate the habitat of polyps, the first step is to find ephyrae shortly after detachment from polyps. We found five ephyrae of N.
Masaya Toyokawa +9 more
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