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First Record in Brazil of Epistylis sp. (Ciliophora) Adhered to Argulus sp. (Argulidae), a Parasite of Hoplias aimara (Eritrhinidae)

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Natural Resources 2016年第6期7卷 331-336页

作者： lincoln lima corrêa Marcos Sidney Brito Oliveira Luiza Prestes Marcos Tavares-Dias Universidade Federal do Oeste do Pará (UFOPA) Instituto de Ciências e Tecnologia das águas (ICTA) Santarém Brasil Programa de Pós-Graduaç ã o em Recursos Aquáticos Continentais Amazô nicos (PPGRACAM) Universidade Federal do Oeste do Pará (UFOPA) Instituto de Ciências e Tecnologia das águas (ICTA) Santarém Brasil Programa de Pós-Graduaç ã o em Ecologia Aquática e Pesca (PPGEAP) Universidade Federal do Pará (UFPA) Belém Brasil Embrapa Amapá Rodovia Juscelino Kubitschek Macapá Brasil

This paper records the first occurrence of Epistylis sp. on the body surface of Argulus sp. parasitizing Hoplias aimara from the upper Araguari River, in the eastern Amazon region, in the north of Brazil. Of the 16 specimens of H. aimara examined, 93.7% had their pelvic, caudal and pectoral fins and tegument infested by Argulus sp. (n = 73), which in turn were infested by Epistylis sp. The specimens of Epistylis sp. from the body surface of Argulus sp. were analyzed using Scanning Electron Microscopy (SEM). The present study also identified a widening of the geographic distribution of these two species of ectoparasites to the eastern Amazon region of Brazil.

关键词： Parasite Ecology Opportunistic Parasite Rio Araguari Eastern Amazon

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Metazoan Parasites of <i>Geophagus proximus</i>, a Cichlidae Fish from the Eastern Amazon (Brazil)

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Natural Resources 2017年第3期8卷 268-277页

作者： Marcos Sidney Brito Oliveira lincoln lima corrê a Liliane de Araújo Castro Letícia Silva Brito Marcos Tavares-Dias Universidade Federal do Oeste do Pará -UFOPA Instituto de Ci&ecirc ncias e Tecnologia das &AACUTE guas (ICTA) Santar&eacute m Brazil Embrapa Amapá Macap&aacute Brazil

The present study investigated the fauna of metazoan parasites of a Geophagus proximus population from the lower Tapajós River, in the state of Pará, northern Brazil. A total of 137 monogeneans were collected from the gills of G. proximus, including Sciadicleithrum kritskyi, Sciadicleithrum paranaensis and Sciadicleithrum geophagi, while 119 Raphidascaris (Sprentascaris) lanfrediae nematodes and 28 metacercariaes of digenea undetermined were collected from the intestine. Hosts harboring four species of parasites were predominant. The parasites had an aggregated dispersion pattern. The present study represents the first record of S. geophagi parasitizing G. proximus, increasing the geographic distribution of these parasite species to the Tapajós River basin.

关键词： Helminths Parasites Freshwater Fish Tapajós River

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Energetic-protein supplementation in the last 60 days of gestation improves performance of beef cows grazing tropical pastures

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Journal of Animal Science and Biotechnology 2018年第1期9卷 208-216页

作者： Aline Gomes da Silva Mário Fonseca Paulino Edenio Detmann Henrique Jorge Fernandes lincoln da Silva Amorim Román Enrique Maza Ortega Victor Valério de Carvalho Josilaine Aparecida da Costa lima Felipe Henrique de Moura Mariana Benevides Monteiro Jéssika Almeida Bitencourt Universidade Federal de Vicosa VicosaMinas Gerais 36570-000Brazil Universidade Federal de Mato Grosso do Sul Campo GrandeMato Grosso do Sul 79074-460Brazil Universidade Estadual de Mato Grosso do Sul AquidauanaMato Grosso do Sul 79200-000Brazil Biotran Biotecnologia e Treinamento em Reproducao Animal AlfenasMinas Gerais 37130-000Brazil Universidade Federal do Acre Rio BrancoAcre 69920-900Brazil

Background： Nutrition is one of the most important factors that affect animal performance, and it therefore also impacts on financial results in beef systems. In this way, finding the best strategy for feeding supplements is of paramount importance. Aiming to evaluate the effect of supplement feeding strategies for beef cows in the last third of gestation, two experiments were conducted. In Experiment 1, 35 pregnant Nellore cows were assigned to a completely randomized design with four treatments： control, which received no supplement; supplementation for the last 30 d of gestation（30-d; 3.0 kg/d）; supplementation for the last 60 d of gestation（60-d; 1.5 kg/d）; or supplementation for the last 90 d of gestation（90-d; 1.0 kg/d）. All supplemented treatments received the same total amount of supplement throughout the experiment： 90 kg（20% of crude protein）. A second experiment（Experiment 2） was delineated to evaluate the effects of the amounts offered in Experiment 1 on intake and metabolism. Four multiparous pregnant Nellore cows were assigned to a 4 × 4 Latin square design, with periods of15 d ***： There was a linear effect of the number of days of supplementation on calving body weight（BW; P 〈 0.05）and a quadratic effect on BW change from parturition to d 31 post-calving（P 〈 0.05）, with cows on the 60-d strategy losing less BW post-calving. No difference was found in offspring birth BW（P 〉 0.10）. A significant linear effect on interval from parturition to conception（P 〈 0.05） was observed, with the highest calving to conception interval being observed in the 90-d strategy. The level of supplementation did not affect forage intake or neutral detergent fiber digestibility（P 〉 0.10）. Nitrogen excreted through urine tended to increase linearly with the level of supplementation（P 〈 0.10）.Conclusion： Providing 1.5 kg of supplement during the last 60 d of gestation improves cow performance after calving, reducing the magnitude of BW lost, and reduces the number of

关键词： Flushing Nutrition Parturition Reproduction

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