RESUMO: A fitoterapia vem sendo utilizada em criação de peixes a fim de promover estabilidade no ambiente de cultivo e na profilaxia de doenças, contribuindo para melhoria do bem-estar animal. Dentre os fitoterápicos, a canela (Cinnamon zeylanicum) possui atividade antioxidante, antiinflamatória, antifúngica e antiparasitária, além de efeito imunoestimulante. O objetivo do trabalho foi avaliar os efeitos do extrato aquoso de canela sobre o desempenho produtivo de larvas do peixe ornamental amazônico Pyrrhulina brevis. Foram avaliadas cinco concentrações de extrato aquoso (0; 0,25; 0,50; 0,75 e 1,0 g/L) em 4 repetições, durante 20 dias. A utilização de 1,0g/L de extrato de Cinnamon zeylanicum favorece o desempenho produtivo das larvas, com melhores resultados para comprimento total final, taxa de crescimento específico para comprimento e promove 100% de sobrevivência ao lote (P<0,05). Este é o primeiro relato da eficácia do uso de extrato aquoso de canela como promotor de crescimento na larvicultura de peixes.Palavras-chave: fitoterapia, peixe ornamental, sanidade. AQUEOUS CINNAMON EXTRACT AS A GROWTH PROMOTER FOR LARVAE OF THE ORNAMENTAL AMAZON FISH Pyrrhulina brevisABSTRACT: Phytotherapy has been used in fish farming to promote stability in the rearing environment and for the prophylaxis of diseases, improving animal well-being. Among phytotherapeutic agents, cinnamon (Cinnamon zeylanicum) exhibits antioxidant, anti-inflammatory, antifungal and antiparasitic activity, in addition to immunostimulatory effects. The objective of this study was to evaluate the effect of an aqueous cinnamon extract on the productive performance of larvae of the ornamental Amazon fish Pyrrhulina brevis. Five concentrations of the aqueous extract (0, 0.25, 0.5, 0.75 and 1.0 g/L) were evaluated in four replicates over a period of 20 days. The use of 1.0 g/L of Cinnamon zeylanicum extract favored larval performance, improving final total length and the specific growth rate in length and promoting 100% survival of the batch (P<0.05). This is the first study demonstrating the efficacy of the use of aqueous cinnamon extract as a growth promoter in fish larviculture.
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