Activity patterns in pike (Esox lucius), as determined by motion-sensing telemetry

Дата канвертавання19.04.2016
Памер3.46 Kb.
Activity patterns in pike (Esox lucius), as determined by motion-sensing telemetry.
W R C Beaumont, K H Hodder, J E G Masters, J S Welton & L J Scott
CEH Dorset, Winfrith Technology Centre, Winfrith Newburgh, Dorchester. Dorset. DT2 8ZD. UK.

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Activity patterns of pike fitted with motion-sensing tags were recorded using novel automated monitoring equipment. Activity was categorised into short duration (<5 s) and long duration (>5 s) events. Pike showed short activity events throughout the day and night however overall duration of activity was low with only c.5% of the time having active pulse patterns. Long duration activity events were very sporadic and were often followed by long periods (>24 h) of quiescence. Experimental and observational records indicated that these long duration events followed by quiescent periods were associated with the fish feeding. Analysis of the temporal patterns in these long duration activity events showed distinct diel patterns, and some seasonal variation associated with sunrise and sunset times. Results from the automated system are compared with results obtained from manual tracking. Data show that activity monitoring is a useful method for determining the feeding periodicity of these fish and will enable a greater understanding of predator – prey interaction.

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