Results 211 to 220 of about 22,102 (258)
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Collective Neuromechanics in Sea Stars
Integrative And Comparative BiologySynopsis Animal locomotion arises from the interaction between motor commands from the nervous system and the body’s mechanical properties. The field of neuromechanics has traditionally framed locomotion as a product of neural control, body mechanics, and sensory feedback. However, many animals deviate from this conventional paradigm.
Theodora Po, Matthew J McHenry
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Isolation and Characterization of Sea Star Factor
Scandinavian Journal of Immunology, 1976Sea star factor (SSF) harvested from the echinoderm Asterias forbesi celomocytes is a potent inhibitor of the primary immune response to T‐dependent antigens and also suppresses concanavalin‐A‐induced mitogenesis. We have isolated and purified a basic protein from this source which has a molecular weight of approximately 38,000 daltons and is ...
R A, Prendergast, S H, Liu
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Sea urchins, sea stars and brittle stars from Terra Nova Bay (Ross Sea, Antarctica)
Polar Biology, 2005Although echinoderms constitute some of the most conspicuous taxa of the Antarctic benthic communities, the echinoderm fauna of Terra Nova has not been described yet. The present study provides the first species list of echinoids, ophiuroids and asteroids from Terra Nova Bay (30–500 m depth) and describes the depth distribution of these species ...
CHIANTORE, MARIACHIARA +5 more
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Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences, 1963
Abstract (1) The rod-shaped skeletal virgalia of lower Palaeozoic somasteroids are homologues of the major skeletal elements of modern asteroids and ophiuroids. (2) The major skeletal elements of asteroids differentiate along growth gradients which show progressive alterations in strength and direction, such that the various families ...
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Abstract (1) The rod-shaped skeletal virgalia of lower Palaeozoic somasteroids are homologues of the major skeletal elements of modern asteroids and ophiuroids. (2) The major skeletal elements of asteroids differentiate along growth gradients which show progressive alterations in strength and direction, such that the various families ...
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Settlement Preferences in Temperate Sea Stars
The Biological BulletinAbstractMany marine invertebrates possess biphasic life histories, during which larvae develop in the plankton and adults inhabit the benthos. The transition between phases entails the settlement of larvae onto substrata, completion of metamorphosis, and survival as vulnerable early juveniles. The perimetamorphic period, encompassing settlement and the
Augustin Roman, Kalytiak-Davis +1 more
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Cooperative transport in sea star locomotion
Current BiologyIt is unclear how animals with radial symmetry control locomotion without a brain. Using a combination of experiments, mathematical modeling, and robotics, we tested the extent to which this control emerges in sea stars (Protoreaster nodosus) from the local control of their hundreds of feet and their mechanical interactions with the body. We discovered
Theodora, Po +2 more
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2011
Before we embark on our journey through the universe, we need to have a look at our preparation. Like on a real journey, certain steps are primordial for the success of the trip. In this chapter, we’ll have a look at our roadmaps, destinations, luggage, and the kind of vehicle we want to use to navigate the stars (Fig. 1.1).
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Before we embark on our journey through the universe, we need to have a look at our preparation. Like on a real journey, certain steps are primordial for the success of the trip. In this chapter, we’ll have a look at our roadmaps, destinations, luggage, and the kind of vehicle we want to use to navigate the stars (Fig. 1.1).
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The Sea and the Stars and the Wastes of the Desert
University of Toronto Quarterly, 1998Imagine the following. You are fortunate enough to be able to attend performances of Verdi's Un ballo in maschera in London, Milan, and then New York. The performances are all different — different casts, conductors, orchestras, staging teams — but you of course have expectations of both difference and sameness.
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Echinoderms (Phylum Echinodermata: sea stars, brittle stars, sea urchins, sea cucumbers)
2018Harold J. Harlan +2 more
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The journey of mankind is the sea of stars
SIGGRAPH Asia 2020 Computer Animation Festival, 2019The film centers around a space carrier in the era of interstellar navigation of the mankind. Inside this space carrier about the size of an asteroid, three rings (i.e. port industrial ring, ecological ring and urban ring) spin slowly with centrifugal force to simulate gravity.
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