Journal
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY
Volume 227, Issue -, Pages -Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jphotobiol.2021.112379
Keywords
Thermal diffusivity; Fish scale; Photoacoustic spectroscopy
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Funding
- Conselho Nacional de Desenvolvimento Cientifico e Tecnologico (CNPq) [301852/2017-0, 305067/2019-2]
- Fundacao de Apoio ao Desenvolvimento do Ensino, Ciencia e Tecnologia do Estado de Mato Grosso do Sul (FUNDECT)
- Coordenacao de Aperfeicoamento de Pessoal de Nivel Superior (CAPES)
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The thermal diffusivity (D) of Astyanax lacustris fish scale was measured using a photoacoustic method, showing that D values can differentiate among different basins, indicating its dependence on scale thickness and water conductivity.
In this work the thermal diffusivity (D) of Astyanax lacustris fish scale is investigated aiming to use it for environmental integrity certification. The D values were obtained by a relatively simple procedure by a photoacoustic method. The chosen fish species is from wide occurrence in Brasil's basins. It has short migration, and it has also been used as environmental bioindicator. The results obtained in 195 scales sampled from three different streams in the Midwest region in Brazil gives an average value of D -& nbsp;4 x 10(-3) cm(2)/s. ANCOVA analysis demonstrated that D values are able to differentiate among the three basins and indicates that it is dependent on the scales thickness and water conductivity. This last one is strongly affected by biotic and abiotic actions, so that D values measured by photoacoustic method can be used for interpreting the environmental integrity from where the fishes were sampled.
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