Results 171 to 180 of about 2,376 (198)

Diversity and occurrence of siphonophores in Irish coastal waters

Biology and Environment: Proceedings of the Royal Irish Academy, 2016
Siphonophores are at times amongst the most abundant invertebrate zooplankton predators in the oceans. Historically, siphonophores have been under-sampled and of the studies conducted there has been a bias towards oceanic oligotrophic waters where they are considered to be more important.
Damien Haberlin,, Gillian Mapstone,, Rob McAllen,, Andrea J. McEvoy,, Thomas K. Doyle,   +4 more
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Myoid Conduction in the Siphonophore Nanomia bijuga

Nature, 1971
MYOID conduction has been suspected in the Cnidaria for some sixty years1, but has only recently been demonstrated2,3. There are no recordings available of activity at the cellular level; until now potentials from cnidarian muscles have been recorded with large extracellular electrodes covering a number of active units.
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Siphonophores and the Deep Scattering Layer

Science, 1963
Bathyscaphe dives in the San Diego Trough have revealed a close spatial relation between siphonophores and the deep scattering layer as recorded by precision depth recording echo-sounders. Measurements of gas bubbles within the flotation structures of Nanomia bijuga captured in a closing net in an ascended ...
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A Historical Consideration of the Siphonophores

Proceedings of the Royal Society of Edinburgh. Section B. Biology, 1972
In his report of theChallengersiphonophores Ernst Haeckel sketches a picture of biological debate and solution calculated to excite historians and philosophers of biology. Here is a distinct zoological issue, Haeckel suggests, to which Darwin's theory of evalution both gives new meaning and offers a solution.
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Bioluminescent and Red-Fluorescent Lures in a Deep-Sea Siphonophore

Science, 2005
Bioluminescence (light production) and fluorescence (re-emission of absorbed radiation as light) are found in an unaccountably diverse array of marine organisms, where their functions are largely unknown. Here we report a deep-sea siphonophore that twitches glowing lures to attract fish. This is rare evidence of bioluminescence used for prey attraction
Haddock, S.H.D., Dunn, C.W., Pugh, P.R., Schnitzler, C.E.   +3 more
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Acoustic Scattering from a Layer of Siphonophores

The Journal of the Acoustical Society of America, 1963
In situ visual and photographic observations of organisms made during a dive of the bathyscaph Trieste in waters off San Diego, California, have been compared with acoustic volume-scattering measurements made simultaneously from a nearby surface ship.
W. E. Batzler, E. G. Barham
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Organization of the nervous system of physonectid siphonophores

Cell And Tissue Research, 1986
An antiserum to the sequence Arg-Phe-amide (RFamide) was used to stain the nervous systems of various physonectid siphonophores. In the stem of Nanomia bijuga, this antiserum stained an ectodermal nerve net, which was interrupted, at regular intervals, by transverse collars of neurons.
Grimmelikhuijzen, C. J.P., Spencer, A. N., Carré, D.   +2 more
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Three new species of remosiid siphonophore (Siphonophora: Physonectae)

Journal of the Marine Biological Association of the United Kingdom, 2009
Three new species belonging to the family Resomiidae (Siphonophora: Physonectae) are described from material mainly collected by ROVs in the vicinity of Monterey Bay, California, USA, with some additional submersible-collected specimens from The Bahamas. Although these species,Resomia ornicephala,R. persica, andR.
Pugh, P.R., Haddock, S.H.D.
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Analysis of locomotion in a siphonophore colony

Proceedings of the Royal Society of London. Series B. Biological Sciences, 1964
The siphonophoreNanomia caraswims forwards and backwards by means of its nectophores. Reverse swimming is a through-conducted response in which the circular muscle in each nectophore contracts and radial fibres (‘fibres of Claus’) in the velum simultaneously shorten, deflecting the water jet emitted through the velar opening forwards.
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Notes on Siphonophores. 3. Nectopyramis spinosa n. sp.

1952
(Uploaded by Plazi from the Biodiversity Heritage Library) No abstract provided.
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