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pro vyhledávání: '"Joan R. Marsden"'
Autor:
Joan R. Marsden
Publikováno v:
Journal of Experimental Marine Biology and Ecology. 176:87-105
Vertical distribution, in a 60 cm water column, was recorded for 1, 2, 3, 4 and 6 day larvae of the tropical serpulid Spirobranchus polycerus (Schmarda), in the dark and under low level overhead illumination. All age classes of larvae were distribute
Autor:
Joan R. Marsden, Jessica J. Meeuwig
Publikováno v:
Journal of Experimental Marine Biology and Ecology. 137:95-104
The serpulid polychaete Spirobranchus giganteus (Pallas) is an obligate associate of live coral. On Barbados reefs it is known to occur more commonly on some coral species than on others. Planktonic presettlement larvae of S. giganteus have been foun
Autor:
Doreen R. Snow, Joan R. Marsden
Publikováno v:
Journal of Natural History. 8:513-527
Summary A population of the marine polychaete Nereis virens at Brandy Cove, New Brunswick has been analysed on the basis of weight distribution in monthly collections made throughout a year. Gametogenesis, spawning and larval life were also studied a
Autor:
Joan R. Marsden, Jane Hsieh
Publikováno v:
Zoomorphology. 106:361-368
The eyespot is structurally similar in trochophore larvae of Harmothoe imbricata, Serpula vermicularis and Spirobranchus giganteus. In the receptor cell parallel lamellae lie below a tuft of microvilli which extends into a hollow in one side of the p
Autor:
Joan R. Marsden
Publikováno v:
Comparative Biochemistry and Physiology Part A: Physiology. 60:353-363
1. 1. A radioautographic study of the uptake of [14C]myoinositol by the brain of Nereis virens indicates that the neurosecretory neuropile, the cells of nucleus XIXS and the infracerebral organ acquire a significantly heavier label in immature than i
Publikováno v:
Comparative Biochemistry and Physiology Part C: Comparative Pharmacology. 68:43-47
1. Micro TLC analysis of the cerebral ganglion of Nereis virens indicate 9 free amino acids and amines present in relative abundance. 2. Of these proline, glycine, glutamic acid, aspartic acid and taurine are known to be related to nervous transmissi
Autor:
Joan R. Marsden
Publikováno v:
International Journal of Invertebrate Reproduction. 5:289-297
The cells of the prototroch and neurotroch in the trochophore larva of G. caespitosa carry basal neurite-like processes, as do those of the apical organ and the light-sensitive cell of the eyespot. Within the prototrochal-neurotrochal neurites are 4
Autor:
Joan R. Marsden
Publikováno v:
Journal of Experimental Marine Biology and Ecology. 19:9-18
The classes of lipid demonstrated in eight species of African sponges are described. Structural lipids are dominant while glycerides are common although variable in quantity. There are triglycerides, and glyceryl ether diesters. Steryl esters were fo
Autor:
Lorraine Pawson, Joan R. Marsden
Publikováno v:
International Journal of Invertebrate Reproduction. 3:133-143
The constricted ‘waist’ of the metamorphosing larva of the polychaete Arenicola cristata is described, using light and electron microscopy. The constriction is shown to be the consequence of the discharge and collapse of a post-trochal ring of ep
Publikováno v:
Tissue and Cell. 13:255-267
The histological visualization of choline acetyltransferase (CAT) and acetylcholinesterase (AChE) on frozen sections of prostomia of Nereis virens indicate a concentration of cholinergic activity in the anterior brain. Components are probably sensory