Behaviour and survival of pike, Esox lucius, with a retained lure in the lower jaw

Authors

  • R. ARLINGHAUS,

  • T. KLEFOTH,

  • A. J. GINGERICH,

  • M. R. DONALDSON,

  • K. C. HANSON,

  • S. J. COOKE


Prof. Dr Robert Arlinghaus, Department of Biology and Ecology of Fishes, Leibniz-Institute of Freshwater Ecology and Inland Fisheries, Müggelseedamm 310, 12587 Berlin, Germany (e-mail: arlinghaus@igb-berlin.de)

Abstract

Abstract  The behaviour and survival of pike, Esox lucius L., released with a retained lure in the mouth was studied relative to control fish, which simulated line breakage prior to landing. Behaviour was monitored during the first hour post-release with the aid of visual floats attached to the fish, and longer-term for 3 weeks, by means of externally attached radio transmitters. Lure-treated pike were less mobile during the first hour post-release, but exhibited greater mobility and travelled further distances from the release area in the first 24 h after release than controls. From the second day after release, the behaviour of lure-treated pike was similar to control fish. No mortality occurred in a 3-week monitoring period. These results are indicative of only short-term behavioural impairments resulting from a retained lure and rapid resubmission of normal behaviour after simulated break-offs.

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