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Entropy 2016, 18(6), 209; doi:10.3390/e18060209

Shannon Entropy in a European Seabass (Dicentrarchus labrax) System during the Initial Recovery Period after a Short-Term Exposure to Methylmercury

1
Research Center for Experimental Marine Biology and Biotechnology—Plentziako Itsas Estazioa (PIE), University of the Basque Country (UPV/EHU), E-48620 Plentzia, Spain
2
Department of Systems Engineering and Automatics, University of the Basque Country (UPV/EHU), E-20018 Donostia, Spain
3
IKERBASQUE Basque Foundation for Science, E-48013 Bilbao, Spain
4
Norwegian College of Fishery Science, Faculty of Biosciences, Fisheries and Economics, University of Tromsø, N-9019 Tromsø, Norway
*
Author to whom correspondence should be addressed.
Academic Editors: Carlos M. Travieso-González and Jesús B. Alonso-Hernández
Received: 29 January 2016 / Revised: 20 May 2016 / Accepted: 21 May 2016 / Published: 27 May 2016
(This article belongs to the Special Issue Entropy on Biosignals and Intelligent Systems)
View Full-Text   |   Download PDF [2029 KB, uploaded 27 May 2016]   |  

Abstract

Methylmercury (MeHg) is an environmental contaminant of increasing relevance as a seafood safety hazard that affects the health and welfare of fish. Non-invasive, on-line methodologies to monitor and evaluate the behavior of a fish system in aquaculture may make the identification of altered systems feasible—for example, due to the presence of agents that compromise their welfare and wholesomeness—and find a place in the implementation of Hazard Analysis and Critical Control Points and Fish Welfare Assurance Systems. The Shannon entropy (SE) of a European seabass (Dicentrarchus labrax) system has been shown to differentiate MeHg-treated from non-treated fish, the former displaying a lower SE value than the latter. However, little is known about the initial evolution of the system after removal of the toxicant. To help to cover this gap, the present work aims at providing information about the evolution of the SE of a European seabass system during a recuperation period of 11 days following a two-week treatment with 4 µg·MeHg/L. The results indicate that the SE of the system did not show a recovery trend during the examined period, displaying erratic responses with daily fluctuations and lacking a tendency to reach the initial SE values. View Full-Text
Keywords: non-linear signal processing; Shannon entropy; fish welfare; aquaculture; environmental monitoring; contaminant detection; biological warning systems; methylmercury; seafood safety; system perturbation non-linear signal processing; Shannon entropy; fish welfare; aquaculture; environmental monitoring; contaminant detection; biological warning systems; methylmercury; seafood safety; system perturbation
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Eguiraun, H.; López-de-Ipiña, K.; Martinez, I. Shannon Entropy in a European Seabass (Dicentrarchus labrax) System during the Initial Recovery Period after a Short-Term Exposure to Methylmercury. Entropy 2016, 18, 209.

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