REPRODUCTIVE BIOLOGY OF Hoplias malabaricus (BLOCH, 1794) (CHARACIFORME: ERYTHRINIDAE) FROM ARTISANAL FISHERIES IN THE PERICUMÃ RIVER BASIN, AMAZON MARANHENSE – BRAZIL

• Autor(a) principal: Fernandes, Jenilce Monica Ferreira
• Data de Publicação: 2021
• Outros Autores: Azevedo, James Werllen de Jesus, Leal de Castro, Antonio Carlos, Ottoni, Felipe Polivanov, Guimarães, Erick Cristofore, Silva de Brito, Pâmella, Lima, Sandy Evelin Rodrigues, Lopes, Danilo Francisco Corrêa, Santos, Jadson Pinheiro
• Tipo de documento: Artigo
• Idioma: por
• Título da fonte: Biota Amazônia
• Texto Completo: https://periodicos.unifap.br/index.php/biota/article/view/6710
• topic: Índice Gonodossomático; Primeira Maturação; Manejo sustentável

This research aimed to analyze the reproductive biology of Hoplias malabricus, a fish known as traíra, in the Hydrographic Basin of the Pericumã River, Amazon Maranhense. All the specimens captured came from artisanal fishing, carried out every two months from July 2018 to July 2019, the fishing gear used was the waiting net. Analysis of length variation in relation to the collection period was made, indicating the month of March 2019 with the highest length rates. In the sexual proportion, females predominated in practically all the months of sampling. The type of growth differed from males to females, with negative isometric and allometric growth, respectively. In the analysis of the condition factor, the highest values were observed in the months of July 2018 and July 2019, a period of drought. The IGS gonodosomatic index showed more accentuated reproductive activity in the rainy season, in December 2018. Finally, the length of the first maturation (L50), and the length where 100% of the specimens were able to reproduce (L100), were 19.6 cm and 27.8 cm, respectively, however the highest catch rates were in the 17 to 18 cm length class, indicating excessive catches and directed at individuals below (L50), which may lead to a population decline. In this way, this study is relevant, as it provides subsidies for further studies, and practices aimed at the preservation and adequate management for the maintenance of populations of this important species in the Baixada Maranhense.Keywords: Gonodosomatic Index; First Maturation; Sustainable management.