The Presence of Spontaneous and Induced Filaments in the Melanophores of Three Species of Teleosts

Abstract
EM study of the melanophores in 3 spp. of teleosts [Fundulus heteroclitus, Opsanus tau and Paralichthys dentatus] shows the presence of 11 nm filaments in their cytoplasm. Three sympathomimetic substances (adrenalin [epinephrine], 6-hydroxydopamine and 5-hydroxydopamine) act in vivo and in vitro to induce a considerable increase in the number of these filaments, mainly in the cell branches.

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