https://www.alice.cnptia.embrapa.br/alice/handle/item/88 Artigo em periódico indexado (CPAF-AP) Sun, 16 Aug 2026 23:06:15 GMT 2026-08-16T23:06:15Z https://www.alice.cnptia.embrapa.br/alice/handle/doc/1189023 Título: Identification of superior dwarf cashew clones (Anacardium occidentale) by graphic analysis in Pacajus, Ceará, Brazil. Autoria: YOKOMIZO, G. K. I.; MELO, D. S.; HONGYU, K.; SERRANO, L. A. L.; VIDAL NETO, F. das C. Conteúdo: Cashew (Anacardium occidentale) is a tropical fruit of economic, nutritional and social importance, thus highlighting the importance of research that can provide modern and more productive genetic materials. Without a doubt the manifestation of GxE interaction makes it difficult to select the best materials. An alternative is to use AMMI graphical analysis, which generates simultaneous representations for each genotype and environment, providing information that allows elucidating the performance of dwarf cashew clones, which was the objective of this work. The experimental design adopted was randomized blocks with 18 treatments (clones) of dwarf cashew trees, with three replications and four plants per plot, at a spacing of 8 x 6 m, with the productivity character being evaluated: PRC: nut productivity; PMC: average nut weight; IPP: precocity of production index; for vegetative characters were: ALT: plant height; DIA: crown diameter. The main conclusions indicate that the superior clones are G1 for PRC; G3, G9, G11 and G18 for PMC; G13 and G16 for IPP; G3, G4 and G6 for ALT and; G1 for DIA; despite the existence of superior clones in positive contribution and stability in each character, only G1 and G3 coincided as superior in two of the five characters evaluated and; there is a dispersion of clones regarding different contributions, indicative of the presence of variability, an important aspect for genetic improvement. Despite the existence of superior clones in positive contribution and stability in each character, only G1 and G3 coincided as superior in two of the five characters evaluated. Thu, 01 Jan 2026 00:00:00 GMT https://www.alice.cnptia.embrapa.br/alice/handle/doc/1189023 2026-01-01T00:00:00Z https://www.alice.cnptia.embrapa.br/alice/handle/doc/1188751 Título: Metazoan parasites in Biotodoma cupido (Cichliformes: Cichlidae) from the Jari River basin, in Brazilian eastern Amazon region. Autoria: MOTA-JÚNIOR, L. de O.; SANTOS, P. V. N.; VALENTIM, D. S. S.; OLIVEIRA, M. S. B.; TAVARES-DIAS, M. Conteúdo: O objetivo deste estudo foi avaliar a comunidade e infracomunidades de parasitas metazoários em Biotodoma cupido da bacia do Rio Jari, na Amazônia brasileira. Todos os peixes (100%) estavam parasitados por uma ou mais espécies, mas hospedeiros infectados por três ou quatro espécies de metazoários predominaram. Um total de 3.052 parasitas foram recuperados, compreendendo os seguintes: Biotodomella mirospinata, Procamallanus spiculastriatus, larvas de Spirocamallanus sp., Hysterothylacium sp., Ascocotyle sp., Diplostomidae gen. sp. e Genarchella genarchella; e também Dolops geayi, Ergasilus sp., Therodamas sp. e Acarina gen. sp. No entanto, o achado predominante foi larvas de Ascocotyle sp. nas brânquias e a maioria dos helmintos encontrados eram larvas. Apenas P. spiculastriatus apresentou um padrão de dispersão aleatório, enquanto as outras espécies de parasitas metazoários apresentaram dispersão agregada. A riqueza de espécies de parasitas foi de 3,52 ± 0,76, índice de diversidade de Brillouin de 0,48 ± 0,25, dominância de Berger-Parker de 0,83 ± 0,12 e uniformidade de 0,22 ± 0,12; valores considerados baixos. Além disso, apenas o peso corporal dos hospedeiros apresentou correlação positiva com a riqueza de espécies de parasitas metazoários. Houve correlação negativa entre a abundância de P. spiculastriatus e o peso e comprimento do hospedeiro, enquanto houve correlações positivas entre a abundância de Ergasilus sp. e Therodamas sp. e o peso e comprimento de seus hospedeiros. Este primeiro estudo sobre a comunidade e infracomunidades de parasitas em B. cupido da Amazônia oriental sugere que este ciclídeo é um hospedeiro intermediário para algumas espécies de helmintos, e possivelmente um hospedeiro definitivo para P. spiculastriatus no ecossistema estudado. Thu, 01 Jan 2026 00:00:00 GMT https://www.alice.cnptia.embrapa.br/alice/handle/doc/1188751 2026-01-01T00:00:00Z https://www.alice.cnptia.embrapa.br/alice/handle/doc/1188421 Título: Astrocaryum aculeatum fixed oil is effective against dactylogyrideans without compromising gill structure in Colossoma macropomum. Autoria: BRITO, B. D.; MARINHO, V. H. S.; FERREIRA, I. M.; TAVARES-DIAS, M. Conteúdo: Dactylogyrideans infect the gills of Colossoma macropomum (tambaqui), causing parasitosis that requires therapeutic intervention. Phytotherapeutics may provide an alternative to chemotherapeutants, which have limited efficacy.This study evaluated the anti-dactylogyridean efficacy of Astrocaryum aculeatum fixed oil on tambaqui, as well as the effects of bath treatments on hematological parameters and gill histopathology. The fixed oil, composed predominantly of palmitic and oleic acids (95.5%), exhibited in vitro efficacy against the dactylogyrideans Anacanthorus spathulatus, Notozothecium janauachensis, and Mymarothecium boegeri, with efficacy depending on the dose. The tegument of these dactylogyrideans exhibited few structural alterations that could account for the observed efficacy. Fish tolerated baths containing 20–160 mg/L of A. aculeatum fixed oil, as no fish died and similar behavioral changes were observed across all concentrations. The highest concentration of A. aculeatum fixed oil (160 mg/L) was then used in 2-h therapeutic baths administered over four consecutive days to tambaqui, alongside one group exposed to culture tank water (negative control) and another exposed to absolute ethyl alcohol (positive control). These bath treatments achieved high efficacy (74.4%) against dactylogyrideans infecting the gills of tambaqui. Treatment with A. aculeatum fixed oil increased plasma protein and glucose levels, as well as mean corpuscular volume, while decreasing mean corpuscular hemoglobin concentration. Fish exposed to ethyl alcohol developed macrocytic hypochromic anemia, and no severe structural alterations of the gills were observed in any of the three groups. Therefore, baths with A. aculeatum fixed oil were effective against dactylogyrideans infecting tambaqui without compromising gill structure, as they induced mild stress in the fish and should therefore be administered with caution. Thu, 01 Jan 2026 00:00:00 GMT https://www.alice.cnptia.embrapa.br/alice/handle/doc/1188421 2026-01-01T00:00:00Z https://www.alice.cnptia.embrapa.br/alice/handle/doc/1183341 Título: Bath treatments with emamectin benzoate control dactylogyrideans infecting. Autoria: BAIA, R. R. de J.; VIDEIRA, M. N.; PACHECO, A. M.; YOSHIOKA, E. T. O.; TAVARES-DIAS, M. Conteúdo: Intensification of fish aquaculture worldwide has led to severe problems of diseases caused by parasitic dactylogyrideans. In this study, the anti-dactylogyridean efficacy of treating Colossoma macropomum with baths of emamectin benzoate (EMB) was investigated for the first time, along with the effects of this treatment on the haematology and histology of its gills. Thirty-nine fish (three replicates of 13 each) received four consecutive daily baths with EMB at a concentration of 0.5 g L−1 and one control group of 39 fish (three replicates of 13 each) only received water from the cultivation tank. The EMB treatments showed effectiveness of 50.2% against Anacanthorus spathulatus, Notozothecium janauachensis and Mymarothecium boegeri infecting the gills of C. macropomum. Fish treated with EMB only caused decreases in the total red blood cell, total thrombocytes, leukocytes, monocytes and neutrophils numbers, while the mean corpuscular haemoglobin concentration (MCHC) increased. Aneurysm was the gill structural alteration caused by EMB treatment, and mean assessment values (MAV) indicated moderate to severe damage due to this irreversible gill alteration. Our results lay a safe foundation for the application of EMB as a potential chemotherapeutic agent for dactylogyridean control in C. macropomum aquaculture, because this drug should be used cautiously for anthelminthic treatment in fish. Thu, 01 Jan 2026 00:00:00 GMT https://www.alice.cnptia.embrapa.br/alice/handle/doc/1183341 2026-01-01T00:00:00Z