Locomotory behaviour and swimming performance of the Norway lobster,Nephrops norvegicus,in the presence of an acoustic tag |
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Authors: | P. L. Newland C. J. Chapman |
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Affiliation: | (1) Department of Zoology, The University, G12 8QQ Glasgow, Scotland;(2) Marine Laboratory, Victoria Road, P.O. Box 101, AB9 8DB Aberdeen, Scotland;(3) Present address: Department of Zoology, University of Cambridge, CB2 3EJ Cambridge, England |
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Abstract: | Observations have been made on the locomotory behaviour and swimming performances of the Norway lobster, Nephrops norvegicus (L.), fitted with an acoustic transmitter ventrally under the cephalothorax. The walking behaviour of adult males (44 mm carapace length) appeared to be unaffected, but the tag caused significant reductions in certain measures of tail-flip swimming performance such as swimming speed and endurance. Flume-tank experiments in low water currents suggested that the transmitter would increase hydrodynamic drag during swimming by 9 to 32%, depending on lobster size. Given the weight and dimensions of the acoustic transmitters currently available, it is considered advisable to confine acoustic tracking studies to relatively large N. norvegicus.Correspondence to: C. J. Chapman |
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