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By J.L. Arpigny, J. Coyette, S. Davail, G. Feller, E. Fonze, E.C. Foulkes, J.-M. Frere, R. Fujii, S. Genicot, C. Gerday, B. Joris, J. Lamotte-Brasseur, J.N. Maina, E. Narinx, M. Nguyen-Disteche, N. Oshima, A. Vairengo, Z. Zekhnini

ISBN-10: 3642785980

ISBN-13: 9783642785986

ISBN-10: 3642786006

ISBN-13: 9783642786006

ADVANCES IN COMPARATIVE AND ENVIRONMENTAL body structure is helping biologists, physiologists, and biochemists continue song of the vast literature in thefield. delivering complete, built-in stories and sound, serious, and provocative summaries, this sequence is a needs to for all energetic researchers in environmental and comparative body structure. the current quantity includes six studies on: - Motile actions of Fish Chromatophores. - Epithelial shipping of Heavy Metals. - Heavy steel Cytotoxicity in Marine Organisms. - Comparative Pulmonary Morphology and Morphometry. - Molecular variations in Resistance to Penicillins. - Molecular diversifications of Enzymes From Thermophilic and Psychrophilic Organisms.

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Since then, several researchers have examined the effects of various inorganic ions on the chromatophores offish (cf. Fujii 1959a, b, 1969). In accord with Spaeth's results, most later workers have reported that cations of alkaline and alkaline-earth metals have pigment-aggregating effects on melanophores of various species of teleosts. The pigment-aggregating action of these ions on chromatophores was considered to be direct. Primarily from observations that denervated melanophores were unresponsive to pigmentaggregating cations, and that the liberation of the sympathetic neurotransmitter was involved in the action on innervated cells, Fujii (1959a) concluded that these cations do not act directly on the melanophores but act on the presynaptic elements of the pigment-aggregating nerves.

In the present article, therefore, we shall review relevant work only briefly, paying particular attention to recent developments. The effects of principles that modulate the responses of chromatophores to hormonal stimuli have seldom been reviewed. 3). 1 Melanophore-Stimulating Hormone In 1957, Pickford and Atz published an extensive review of the pituitary control of fish chromatophores. The more recent reviews cited above are also very useful. In the present review, our citations are mainly restricted to subsequent publications.

The "excitement darkening", which will be touched upon later in this review, may be representative of the beta-receptor-mediated Filctors Influencing Motile Activities of Fish Chromatophores 31 reactions (Sect. 7). A sudden outflow of the amine from the chromaffin cells is considered to induce this remarkable change in coloration. Enami (1955) recorded a peculiar case ofa teleost, namely the siluroid catfish Silurus asotus, in which epinephrine applied either in vivo or in vitro always induced darkening of the skin.

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Advances in Comparative and Environmental Physiology by J.L. Arpigny, J. Coyette, S. Davail, G. Feller, E. Fonze, E.C. Foulkes, J.-M. Frere, R. Fujii, S. Genicot, C. Gerday, B. Joris, J. Lamotte-Brasseur, J.N. Maina, E. Narinx, M. Nguyen-Disteche, N. Oshima, A. Vairengo, Z. Zekhnini


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