Single and Combined Effects of Ultraviolet Radiation and Triclosan During Metamorphosing Solea Senegalensis

32 Pages Posted: 30 May 2022

See all articles by Mario Araujo

Mario Araujo

affiliation not provided to SSRN

Carla Quintaneiro

affiliation not provided to SSRN

Rui J.M. Rocha

affiliation not provided to SSRN

Pedro Pousão-Ferreira

affiliation not provided to SSRN

Ana Candeias-Mendes

affiliation not provided to SSRN

Amadeu M.V.M. Soares

Universidade de Aveiro - Department of Biology

Marta M.S. Monteiro

affiliation not provided to SSRN

Abstract

Ultraviolet radiation (UV) and triclosan (TCS) affect the early development of marine fish; however, the corresponding molecular mechanisms are still not fully understood. Therefore, this work aims to study the effects of the single and combined to these stressors during the thyroid-regulated metamorphosis of the flasfish Solea senegalensis .Sub-lethal exposure (5.89 kJ.m -2 UV and/or 0.546 and 1.090 mg.L -1 TCS) was performed for 48h at the beginning of metamorphosis (13 days after hatching, dah), followed by a period in clean medium until complete metamorphosis (24 dah). Malformations, metamorphosis progression, length, behavior and the expression of thyroid-axis related genes were studied.TCS induced malformations, decreased swimming, and induced metamorphosis acceleration at 15 dah, followed by a significant metamorphosis delay. Such effects were more noticeable in the presence of UV. The down-regulation of five thyroid axis-related genes occurred after the exposure to TCS (15 dah), and after 9 days in clean media, only two genes were still down-regulated. UV exposure increased the effect of TCS by further down-regulating gene expression immediately after the exposure.Since several effects persisted after a period in clean medium, implications of these stressors (mainly TCS) on the ecological performance of the species are suggested.

Keywords: abiotic stress, flatfish, behavior, Metamorphosis, personal care products, thyroid axis

Suggested Citation

Araujo, Mario and Quintaneiro, Carla and Rocha, Rui J.M. and Pousão-Ferreira, Pedro and Candeias-Mendes, Ana and Soares, Amadeu M.V.M. and Monteiro, Marta M.S., Single and Combined Effects of Ultraviolet Radiation and Triclosan During Metamorphosing Solea Senegalensis. Available at SSRN: https://ssrn.com/abstract=4122760 or http://dx.doi.org/10.2139/ssrn.4122760

Mario Araujo (Contact Author)

affiliation not provided to SSRN ( email )

No Address Available

Carla Quintaneiro

affiliation not provided to SSRN ( email )

No Address Available

Rui J.M. Rocha

affiliation not provided to SSRN ( email )

No Address Available

Pedro Pousão-Ferreira

affiliation not provided to SSRN ( email )

No Address Available

Ana Candeias-Mendes

affiliation not provided to SSRN ( email )

No Address Available

Amadeu M.V.M. Soares

Universidade de Aveiro - Department of Biology ( email )

Marta M.S. Monteiro

affiliation not provided to SSRN ( email )

No Address Available

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