Symbolic dynamics and entropies of copepod behaviour under non-turbulent and turbulent conditions |
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Authors: | Maud Moison, Fran ois G. Schmitt, Sami Souissi, Laurent Seuront,Jiang-Shiou Hwang |
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Affiliation: | aUniversité des Sciences et Technologies de Lille – Lille1, CNRS, UMR 8187 Laboratoire d'Océanographie et de Géoscience, Wimereux Marine Station, 28 av. Foch, 62930 Wimereux, France;bSchool of Biological Sciences, Flinders University, GPO Box 2100, Adelaide 5001, South Australia, Australia;cInstitute of Marine Biology, National Taiwan Ocean University, Keelung, Taiwan 202, Republic of China |
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Abstract: | We consider here behavioural activity of copepods as a succession of symbols associated with swimming states: slow swimming, fast swimming, break and grooming. We characterise these symbolic sequences using tools from symbolic dynamics: probability density function of the residence times in each state; transition probability at each time step; Shannon entropy and dynamic entropy. This approach is applied to the swimming behaviour of Centropages hamatus which we have analyzed as an example of application, in order to stress the differences associated with turbulent and non-turbulent conditions. We characterise in this theoretical framework the behavioural changes exhibited by the copepod under turbulent conditions. |
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Keywords: | Copepods Turbulence Behaviour Entropy Symbolic dynamics |
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