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Journal of Experimental Biology 118,341-349 (1985)
Published by Company of Biologists 1985

Effects of Adrenalin on the Oxygen Consumption and Luminescence of the Photophores of the Mesopelagic Fish Argyropelecus Hemigymnus

J. Mallefet 1 and F. Baguet 1

1 Laboratoire de Physiologie Générale et des Animaux Domestiques, Universite Catholique de Louvain, 5, Place de la Croix du Sud, B-1348 Louvain-la-Neuve, Belgium

1. Photophores isolated from the mesopelagic fish Argyropelecus hemigymnus consume oxygen at a rate of l.22 ± 0.17 nmol min-1 in saline at 20°C.

2. In the presence of 5 x 10-4 moll-1 adrenalin the preparations that responded by a long-lasting luminescence showed a significant decrease of their resting respiration rate. After the adrenalin had been washed out, oxygen consumption increased immediately to the previous resting level and was inhibited by 5 x 10-4moll-1 KCN.

3. It is suggested that the mechanism of light production by isolated photophores of the epipelagic fish Porichthys and the mesopelagic fish Argyropelecus are different.

Key words: Respiration, luminescence, photophores

Accepted on April 3, 1985






© The Company of Biologists Ltd 1985