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- Title
O EFEITO DE DEFENSIVOS AGRÍCOLAS SOBRE A REPRODUÇÃO DE PEIXES NATIVOS.
- Authors
Duarte dos Santos, Gabriel Felipe; Rocha Garcez, Jânderson; Martinez Freire, Guilherme; dos Santos, Magno; Menezes Frisso, Rosimery; Rodriguez, Emanuel Sanchez; Façanha Cavalcante, Lyen Kalline; Garcia Olimpio, Roney; Castilho Marinho, André Felipe; Amaral Junior, Walter Pinto; Marques de Brito, Victor Gabriel; Cuadros Cavalcante, Jasmine Luisa
- Abstract
Agricultural pesticides are products used in rural environments aimed at controlling pests, however, improper use can lead to contamination of aquatic environments. The objective of this study was to evaluate the effects of glyphosate, malathion, and casugamycin on the fertilization, hatching, and survival rates of tambaqui larvae. Two pairs of tambaqui (females 7.73 ± 1.54 kg and males 6.18 ± 0.65 kg) were subjected to artificial reproduction using the synthetic GnRH analog Sincrofort®. Three experiments were conducted: (i) concentrations of 0.0; 2.0; 4.0; 6.0; 8.0; 10.0; and 14.0 mg L-1 of glyphosate were tested, (ii) concentrations of 0.0; 0.25; 0.5; 0.75; 1.0; 1.25; and 1.5 µg L-1 of malathion, and (iii) concentrations of 0.0; 0.25; 0.5; 0.75; 1.0; 1.25; and 1.5 mg L-1 of casugamycin. The eggs were incubated in plastic containers, and the treatments were the different concentrations evaluated, all with five replications. A container with 20 eggs was considered as one experimental unit. The experiment was conducted under controlled conditions, at room temperature, and with low light. Data were subjected to analysis of variance. The treatment with incubation water without glyphosate showed the best fertilization, hatching, and survival rates (p<0.05). Incubation water without malathion showed the best fertilization rate (p<0.05), with no effect on hatching and survival rates (p>0.05). The treatment containing 0.25 mg L-1 of casugamycin increased the fertilization rate, and water without casugamycin had higher larval survival (p<0.05), with no effect on the hatching rate (p>0.05). Thus, it was verified that all tested products showed toxicity during some phase of tambaqui egg incubation.
- Subjects
POLLUTION; AGRICULTURE; PEST control; WATER purification; MALATHION
- Publication
Revista Foco (Interdisciplinary Studies Journal), 2024, Vol 17, Issue 4, p1
- ISSN
1981-223X
- Publication type
Article
- DOI
10.54751/revistafoco.v17n4-056