Results 151 to 160 of about 1,465 (171)
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Ciliary Movement and the Density of Pleurobrachia
Nature, 1942THE density of the living Ctenophore Pleurobrachia pileus (O. F. M. ) has been determined recently at Plymouth by two distinct methods. In the first case ten specimens all having the approximate diameter of 1 cm. were introduced into a 5 ml. density bottle, together with sea water, and weighed.
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Foraging Behavior and Prey Selection by the Ambush Entangling Predator Pleurobrachia Bachei
Ecology, 1986Ctenophores and other gelatinous predators in the ocean are ephemeral in their spatial and temporal distributions, but often have a dramatic impact on the dynamics of their prey populations. Considerable information is currently available on the functional and numerical responses of several nearshore ctenophore species; however, an understanding of ...
Charles H. Greene +2 more
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Unilateral Ciliary Reversal and Motor Responses During Prey Capture by the Ctenophore Pleurobrachia
Journal of Experimental Biology, 1985ABSTRACT High-speed cinematography of feeding Pleurobrachia revealed a stereotyped sequence of ciliary motor responses underlying the feeding behaviour of this ctenophore. Prey capture by a tentacle first elicited high frequency beating in all comb rows, propelling the animal forward at a rapid speed for several seconds.
S L, Tamm, A G, Moss
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Hydrolytic enzymes in the two North Sea ctenophores Pleurobrachia pileus and Beroe gracilis
Marine Biology, 1984Hydrolytic enzyme activities were determined in tissue extracts of the two North Sea ctenophores Pleurobrachia pileus and Beroe gracilis. The following activities were measured in field samples and characterized according to their mean specific activities and their pH optima: protease, aminopeptidase, amylase, N-acetylglucosaminidase, β-glucosidase ...
U. Hoeger, T. P. Mommsen
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Seasonal occurrence of the ctenophore Pleurobrachia pileus in the western Dutch Wadden Sea
Marine Biology, 1984Due to the short residence time of the water in the western Dutch Wadden Sea the ctenophore Pleurobrachia pileus has to be considered as an allochthonous species, which enters the estuary passively from the North Sea. The seasonal occurrence of this species in the Dutch Wadden Sea is a reflection of its abundance in the coatal zone of the North Sea and
H. W. van der Veer, C. F. M. Sadée
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Journal of Experimental Zoology Part B: Molecular and Developmental Evolution, 2010
AbstractCtenophores are non‐bilaterian animals sharing with cnidarians and bilaterians the presence of sensory receptors, nerve cells, and synapses, absent in placozoans and sponges. Although recent immunofluorescence studies have renewed our knowledge of cnidarian neuro‐anatomy, ctenophores have been much less investigated despite their importance to ...
Jager, Muriel +5 more
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AbstractCtenophores are non‐bilaterian animals sharing with cnidarians and bilaterians the presence of sensory receptors, nerve cells, and synapses, absent in placozoans and sponges. Although recent immunofluorescence studies have renewed our knowledge of cnidarian neuro‐anatomy, ctenophores have been much less investigated despite their importance to ...
Jager, Muriel +5 more
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The physiology of feeding in the ctenophore Pleurobrachia pileus
Hydrobiologia, 1991Ciliary organelles play important roles in many of the locomotory and sensory functions of ctenophores. This paper reviews published work on the physiology and behavior of ciliary-based feeding in Pleurobrachia pileus and presents recent preliminary work on the conduction pathway controlling this behavior.
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Gene Expression Patterns in the Ctenophore Pleurobrachia bachei: In Situ Hybridization
In situ hybridization is a powerful and precise tool for revealing cell- and tissue-specific gene expression and a critical approach to validating single-cell RNA-seq (scRNA-seq). However, applying it to highly fragile animals such as ctenophores is challenging.Andrea B, Kohn +2 more
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Effect of ctenophore predation on mesozooplankton during a spring outburst of Pleurobrachia pileus
Netherlands Journal of Sea Research, 1990A spring outburst of the ctenophore Pleurobrachia pileus in Dutch coastal waters was studied by almost daily sampling. Till the end of May, small ctenophores (
Bouwe R. Kuipers +3 more
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1975
(Uploaded by Plazi from the Biodiversity Heritage Library) No abstract provided.
Flores, Marilyn, Brusca, Gary J
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(Uploaded by Plazi from the Biodiversity Heritage Library) No abstract provided.
Flores, Marilyn, Brusca, Gary J
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