Sea anemones
Species delimitation in sea anemones (Anthozoa: Actiniaria): From traditional taxonomy to integrative approaches
... on sea anemones show that the stinging capability of cnidarians was the main reason why earliest zoologists decided to focus on these plant-like ...the sea anemone Actinia rufa to a minor section of ...
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Symbiosis of sea anemones and hermit crabs: different resource utilization patterns in the Aegean Sea
... the sea anem- one via the hermit crab’s behavior of avoiding or even fighting animals attempting to prey on their attached sea anemones (Brooks and Gwaltney ...The sea anemone gains additional ...
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The role of L Dopa in the nervous system of sea anemones: a putative inhibitory transmitter in tentacles
... not associated with any of the three known conducting systems (TCNN, SS1 and SS2) that show no restriction to pulse spread. Local conducting systems do exist in sea anemones but little is known about them. ...
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Sea anemones (Cnidaria: Actiniaria, Corallimorpharia, Ceriantharia, Zoanthidea) from marine shallow-water environments in Venezuela: new records and an updated inventory
... The Caribbean coastline of Venezuela extends approxi- mately 2,695 km, plus an important insular region con- stituted by 14 archipelagos composed of 300 island and keys (Conde & Carmona-Suárez 2003; Miloslavich et ...
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Behavioural physiology of sea anemones
... from sea anemones is probably due to a combination of the recording techniques employed and the nature of the tissue from which recordings are being made* The means by which electrical activity is detected ...
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A Respiratory Rhythm in Sea Anemones
... Recent studies on the O2 consumption of sea anemones have produced results that are inconsistent: Newell & Northcroft 1967 observed that Actinia equina consumed O2 at variable rates at e[r] ...
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OPPOSITE ACTIONS OF THE ANTHOZOAN NEUROPEPTIDE Antho RNamide ON ANTAGONISTIC MUSCLE GROUPS IN SEA ANEMONES
... The actions of Antho-RNamide on isolated muscle preparations of sea anemones and intact animals can be summarized as follows: i it evokes contraction of longitudinal muscles in tentacles[r] ...
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Nerve Nets and Conducting Systems in Sea Anemones: Two Pathways Excite Tentacle Contractions in Calliactis Parasitica
... Single shocks to the column may elicit tentacle movements - either an 'early' contraction after a through-conducting nerve net TCNN pulse or a 'delayed' contraction after an ectodermal s[r] ...
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Menthol induced bleaching rapidly and effectively provides experimental aposymbiotic sea anemones (Aiptasia sp ) for symbiosis investigations
... menthol-treated anemones, and establish whether there were any significant long-term impacts of menthol treatment versus no treatment on physiological performance ( photosynthesis and respiration) of the ...
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Facilitation in Sea Anemones
... RESPONSES TO SINGLE STIMULI WITH OTHER TREATMENTS The observation that extracts of Metridium and CaUiactis enable responses to occur to occasional shocks in a low-frequency series so soo[r] ...
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Short Communication: Chemoreception in Sea Anemones: Betaine Stimulates the Pre Feeding Response in Urticina Eques and U Felina
... In Urticina eques, food extracts that excite the pre-feeding response evoke a low-frequency series of SSI pulses; and electrical stimulation of the SSI, in the absence of food, causes pr[r] ...
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Three Anthozoan Neuropeptides, Antho RFamide and Antho RWamides I and II, Modulate Spontaneous Tentacle Contractions in Sea Anemones
... The Antho-RWamides inhibit spontaneous contractions of ectodermal tentacle muscles in Actinia equina: this is the first time that naturally occurring substances have been shown to inhibi[r] ...
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Effects of three anthozoan neuropeptides, Antho RWamide I, Antho RWamide II and Antho RFamide, on slow muscles from sea anemones
... Some of the muscle preparations we used are known to give only slow contractions circular muscles, while others display fast and slow contractions sphincter and retractor muscles; some o[r] ...
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Facilitation in Sea Anemones
... This absence of the effects associated with a peripheral action suggests that the effect of tyramine on the size and character of the response is due to an action on the neuromuscular ju[r] ...
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Mechanical Organization of Cantileverlike Sessile Organisms: Sea Anemones
... Anthopleura xanthogrammica is exposed to wave action, but because it is short, wide, and thick-walled, maximum tensile stresses in its body walls due to flow forces are an order of magni[r] ...
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Digestion in sea anemones
... In the experiments of Krijgsman & Talbot 1953, cited above, the coelenteric fluid collected from anemones which were fed pieces of sponge containing meat extract showed pronounced proteo[r] ...
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On the nematocysts of sea anemones
... 2 ,-Diagrams illustrating the average size of the capsules of the penicilli in the acontia of twelve specimens of Sagartia elegans.. In this figure, and in Text-Figs.[r] ...
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Effects of Sea Anemones on the Flow Forces They Encounter
... Measurements of drag forces on anemones and models in a flow tank and in the field indicate that the shapes, sizes, flexibilities, and behaviours of anemones affect the flow forces they [r] ...
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Facilitation in Sea Anemones
... At a dilution of 1 : 250 the responses to single stimuli lasted much longer, and although the normal response to the second stimulus predominated after 20 min., single stimuli caused occ[r] ...
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Viso Elastic Properties of the Body Wall of Sea Anemones
... Strain plotted against a logarithmic time scale for experiments H38A • isolated mesogloea and H38B O intact body-wall from the same specimen of Calliactis.. The arrow marks the start o[r] ...
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