Journal ArticleDOI
Specificity of ovulation hormones of some basommatophoran species studied by means of iso- and heterospecific injections.
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TLDR
Isospecific injections of intercerebral commissure extracts of L. stagnalis, L. palustris, and L. ovata induced oviposition in a high percentage of the experimental snails and indicated a likely structural similarity of the ovulation hormones within the genus Lymnaea.About:
This article is published in General and Comparative Endocrinology.The article was published on 1983-10-01. It has received 11 citations till now. The article focuses on the topics: Bulinus truncatus & Lymnaea.read more
Citations
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Journal ArticleDOI
Neuro-Endocrine Control of Reproduction in Hermaphroditic Freshwater Snails: Mechanisms and Evolution
TL;DR: This review provides a comprehensive overview of the neuro-endocrine control of male and female reproductive processes in freshwater snails and suggests a few possible mechanisms via which this animal can effectively switch between the two sexual roles in the flexible way that it does.
Book ChapterDOI
Cytobiology of the Ovulation-Neurohormone Producing Neuroendocrine Caudo-Dorsal Cells of Lymnaea stagnalis
TL;DR: The quantitative electron microscopic analyses of the cyclic dynamics of CDC activity show the way in which a neuroendocrine system can meet the physiological demand for a sudden high titer of neurohormone to induce ovulation by synthesizing, transporting, and degrading secretory material in a timed, cyclic, and quantitative fashion.
Journal ArticleDOI
Effect of the photoperiod on the time schedule of egg mass production in Lymnaea stagnalis, as induced by ovulation hormone injections.
TL;DR: In the pulmonate snail Lymnaea stagnalis the neurosecretory caudo-dorsal cells (CDC) produce an ovulation hormone (CDCH) which is released at the periphery of the cerebral commissure (COM).
Journal ArticleDOI
Morphology of neurosecretory cells in basommatophoran snails homologous with egg-laying and growth hormone-producing cells of Lymnaea stagnalis.
E. W. Roubos,A.M.H. van de Ven +1 more
TL;DR: In a light and electron microscope study, neurosecretory cells morphologically homologous with the egg-laying hormone- producing caudodorsal cells (CDC) and growth hormone-producing dorsal cells (DC) of the freshwater basommatophoran snail Lymnaea stagnalis have been found and it is concluded that the functions of these cells are homologueous as well.
References
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Journal ArticleDOI
The control of ovulation in the hermaphroditic freshwater snail Lymnaea stagnalis by the neurohormone of the caudodorsal cells
TL;DR: It is concluded that the CDC produce a hormone, which controls ovulation, which is injected into intact, unoperated, adult snails and induced egg-laying in most but not all recipients, indicating that other factors, at present unknown, can impede the effect of the ovulation hormone.
Journal ArticleDOI
Dorsal Bodies and Dorsal Neurosecretory Cells of the Cerebral Ganglia of Lymnaea Stagnalis L
Journal ArticleDOI
States of excitability in ovulation hormone producing neuroendocrine cells of Lymnaea stagnalis (gastropoda) and their relation to the egg-laying cycle.
TL;DR: The electrotonically coupled network of about 100 neuroendocrine caudodorsal cells of the freshwater snail Lymnaea stagnalis exhibits three states of excitability with distinct electrophysiological characteristics, and the excitability states are clearly related to the egg-laying cycle of the snail.
Journal ArticleDOI
Some Observations Upon the Maintenance of Australorbis Glabratus in the Laboratory
Journal ArticleDOI
Formation, storage, and release of neurosecretory material studied by quantitative electron microscopy in the fresh water snail Lymnaea stagnalis (L.).
TL;DR: The process of neurosecretion in the fresh water snail Lymnaea stagnalis was analysed quantitatively at the ultrastructural level and it was concluded that the rate of transport of the elementary granules through the axons fluctuates rhythmically.