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Direct measurements of metabolism, activity and feeding behaviour of pike, Esox Zucius L., in the wild, by the use of heart rate telemetry
Author(s) -
Lucas M. C.,
Priede I. G.,
Armstrong J. D.,
Gindy A. N. Z.,
Vera L.
Publication year - 1991
Publication title -
journal of fish biology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.672
H-Index - 115
eISSN - 1095-8649
pISSN - 0022-1112
DOI - 10.1111/j.1095-8649.1991.tb04366.x
Subject(s) - pike , esox , biology , metabolic rate , zoology , heart rate , specific dynamic action , telemetry , metabolism , metabolic activity , fish <actinopterygii> , ecology , endocrinology , fishery , physiology , engineering , aerospace engineering , blood pressure
Heart rate telemetry records of up to 5 days duration were obtained from pike living in Lochs Kinord and Davan, Scotland. Applying metabolic rate correlations it was found that mean metabolic rate (R) was 1.5 times standard metabolic rate (R a ), The fish rarely worked near their metabolic limits. Activity metabolism (R a ) was much higher than estimates based on mean swimming speed and comprised up to 10% of R. Most activity metabolism was the result of localized bursts of activity. Less than 10% of activity showed evidence of oxygen debt. Specific Dynamic Action or feeding metabolism (R f ) comprised 15–25% of R. Food intake estimated from heart rate was 1.5% wet body weight day −1 , consumed in the form of small items captured during the day and digested during the afternoon and night.