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Ecotoxicology

, Volume 26, Issue 1, pp 13–21 | Cite as

Stress test of a biological early warning system with zebrafish (Danio rerio)

  • João Amorim
  • Miguel Fernandes
  • Vitor Vasconcelos
  • Luis Oliva Teles
Article

Abstract

The aim of this work was to develop a novel methodology to stress test the diagnostic capability of a video tracking system with zebrafish (Danio rerio), against two pre-established disturbances. Eight different treatments were tested varying the presence or absence of a toxicant (NaOCl) and two disturbances: the passing of a shadow (mimicking a predator) and entrapment of the fish. The concentration tested corresponded to a sublethal (1 % 24 h-LC50) and short term exposure (2 h). A total of 56 organisms were tested resulting in 112 diagnoses (before and after the contamination). A statistical model of diagnosis was developed using Self-organizing Map (SOM) and Correspondence Analysis (CA). Sensitivity, specificity, accuracy, false positive and false negative values were calculated to evaluate the diagnostic performance. The disturbances did not negatively affect the capability of the model. In the presence of at least one of these variables, the diagnostic performance was similar or even superior to the baseline results without disturbances. Furthermore, the system produced a large number of correct diagnoses, at an ecologically relevant concentration of exposure, in a non-invasive way.

Keywords

Behavior Diagnostic performance Disturbances Sodium hypochlorite Zebrafish 

Notes

Acknowledgments

This research was partially funded by UID/Multi/04423/2013 project from Fundação para a Ciência e Tecnologia.

Compliance with ethical standards

Conflict of interest

The authors declare that they have no competing interests.

Ethical approval

All applicable international, national, and/or institutional guidelines for the care and use of animals were followed.

Informed consent

Informed consent was obtained from all individual participants included in the study.

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Copyright information

© Springer Science+Business Media New York 2016

Authors and Affiliations

  1. 1.Departamento de BiologiaFaculdade de Ciências da Universidade do PortoPortoPortugal
  2. 2.CIIMAR, Centro Interdisciplinar de Investigação Marinha e AmbientalPortoPortugal

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