NERVOUS SYSTEM OF BIVALVE MOLLUSC MEGANGULUS VENULOSUS UNDER THE INFLUENCE OF INCREASED TEMPERATURE AND HYPOXIA
E. P. Kotsyuba
A. V. Zhirmunsky Institute of Marine Biology, Far East Branch RAS, Vladivostok;
e-mail: epkotsuba@mail.ru
Using immunocytochemistry combined with light and electron microscopy, the distribution and ultrastructure of tyrosine hydroxylase (TH)-immunoreactive neurons in the CNS of bivalve
mollusc, Megangulus venulosus, have been studied under the influence of increased temperature and hypoxia. It has been established, that the stress causes changes in the amount
of TH and in the structure of TH-immunopositive neurons in all ganglia. The most essential changes in CNS of M. venulosus were revealed after 60 min exposure to increased temperature and
hypoxia; degenerative changes in large neurons, reduction of the synapses and reduction of TH-immunoreactivity in neurons and neuropil.
Key words: nervous system, tyrosine hydroxylase, catecholamine, stress, bivalve molluscs
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