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Chemical composition of the essential oil of Aloysia triphylla under seasonal influence and its anaesthetic activity in fish
Author(s) -
Parodi Thaylise Vey,
Gressler Luciane Tourem,
Silva Lenise de Lima,
Becker Alexssandro Geferson,
Schmidt Denise,
Caron Braulio Otomar,
Heinzmann Berta Maria,
Baldisserotto Bernardo
Publication year - 2020
Publication title -
aquaculture research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.646
H-Index - 89
eISSN - 1365-2109
pISSN - 1355-557X
DOI - 10.1111/are.14594
Subject(s) - limonene , citral , essential oil , biology , catfish , chemical composition , composition (language) , fish <actinopterygii> , horticulture , toxicology , botany , chemistry , fishery , organic chemistry , linguistics , philosophy
Plants are sources of secondary metabolites, and some are rich in essential oils (EOs), which possess a bioactive pharmacological importance as sedatives and anaesthetics that have been experimentally demonstrated in fish. In search of products with lower residual effects and optimization of the production based on the local flora, the properties of the EO of Aloysia triphylla (EOAT) have been investigated. The samples of two years were analysed for the percentage variability of the chemical composition and the totality of the major components according to the season. Limonene, citral isomers (α and β), caryophyllene, caryophyllene oxide and spathulenol were the main constituents of the EOAT throughout these two years. In the second year, caryophyllene predominates over its oxide in all seasons; however, in the first year, it occurs only in autumn and winter. Seasonal pools of EOs were made for the biennium obtaining four samples, and silver catfish ( Rhamdia quelen ) juveniles were subjected to a concentration range of 20–800 μl/L EOAT in order to assess induction and recovery times of anaesthesia. The relationships between percentages of individual components in EOAT and time to induce deep anaesthesia indicate that its activity may be attributed to the association of several of its components.