Nachweis circanualer Periodik bei der Quappe (Lota lota L.) (Pisces,Gadidae)

Summary Investigations on daily rhythm in the burbot (Lota lota L.) in the Arctic Circle showed that a phase-shift in the locomotor activity occurred under nLD; the fish, which is night-active in the summer, phase-shifted 180 degrees in relation to the phase-timing factor. This phase-shift was also found in a fish kept in artificial light (LD 1212) which occurred at almost the same time of year. Accordingly an endogenous circaannual rhythm is suggested.

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Die Untersuchungen erfolgten mit Unterstützung der Max-Planck-Gesellschaft zur Förderung der Wissenschaften und des Staatlichen Schwedischen Naturwissenschaftlichen Forschungsrates.