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Yield and Characterization of the Centesimal Composition of Amazonian Estuarine Fish

Journal of Agricultural Science and Technology(B) 2019年第3期9卷 175-183页

作者： Arllon José dos Santos Dias Nyelle Priscila Brito Facanha ed marcos homobono da silva Evlen Tamille silva do Carmo Charles dos Santos Barros Gabriel Araujo da silva Laboratory of Organic Chemistry and Biochemistry Amapá State University Macapá Amapá 68900-070 Brazil

Fish, as one of the fishery resources, is an important constituent of the diet of the Amazon population, as it is the source of several nutritional components. The present work aimed to characterize the centesimal composition of Plagioscion squamosissimus fillet (n = 10) and Macrobrachium amazonicum meat (n = 82), species acquired in the estuarine region of the state of Amapá, Brazil. Carcass yield, as well as protein, water content, lipids and ashes was determined according to the methodologies proposed by the Adolf Lutz Institute, as well as carbohydrate and caloric determinations. The analyses were performed in triplicate per sample. After comparing with the literature, it was possible to conclude that P. squamosissimus presented a fillet yield of 31.11%± 0.61%, high protein content (15.99 ± 1.26 g/100 g) and humidity (79.40 ± 1.10 g/100 g), moderate contents of mineral residues (1.10 ± 0.07 g/100 g) and carbohydrates (0.96 ± 0.90 g/100 g), low lipid contents (2.29 ± 0.65 g/100 g), as well as low caloric values (385,018.12 J/100 g) and M. amazonicum a meat yield of 44.12%± 8.34%, high levels of protein (22.81 ± 1.72 g/100 g), carbohydrates (1.92 ± 1.61 g/100 g) and mineral residues (1.76 ± 0.78 g/100 g), moderate water content (73.38 ± 0.78 g/100 g), low lipid levels (0.43 ± 0.08 g/100 g), as well as low caloric values (440,786.3 J/100 g). The results obtained in this work can serve as a subsidy in nutritional diets for humans, thus allowing an adequate dietary use of these species.

关键词： Nutritional assessment bromatological variables nutritional value chemical parameters of food

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Emergent Macrophytes Alter the Sediment Composition in a Small, Shallow Subtropical Lake: Implications for Methane Emission

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American Journal of Plant Sciences 2015年第2期6卷 315-322页

作者： Claudio Cardoso Marinho Cleber Palma-silva edélti Faria Albertoni Iara Bueno Giacomini marcos Paulo Figueiredo Barros Leonardo Marques Furlanetto Francisco de Assis Esteves Laboratório de Limnologia Departamento de Biologia Universidade Federal do Rio de Janeiro Rio de Janeiro Brasil Laboratório de Limnologia Instituto de Ciências Biológicas Universidade Federal do Rio Grande—FURG Rio Grande Brasil NUPEM—Universidade Federal do Rio de Janeiro Macaé Brasil

Aquatic macrophytes in shallow lakes emit high levels of methane. We hypothesize that the presence of emergent aquatic macrophytes in an artificial shallow lake promotes important input of autochthonous organic matter (OM) in sediment and higher levels of methane emission via bubbles. Samplings were performed at three sites in a small, shallow subtropical lake: (1) one station in the limnetic region and (2) - (3) two stations in the littoral region ((2) inside and (3) outside aquatic macrophyte stands). A higher concentration of OM was observed at the macrophyte station, and within this site, a higher methane concentration was observed in the sediment. These results could explain the methane ebullition values at macrophyte sites. At the macrophyte station, methane emission via bubbles contributed 17% to 56% of the total methane emission;however, at the other stations, its contribution via bubbles, was lower than 1%. This research confirmed the importance of emergent macrophytes at Polegar Lake as a source of OM in sediment and methane emission via bubbles. Further, we could confirm the positive effects of temperature on methane emission, mainly by bubbles.

关键词： Methane Emission Shallow Lakes Greenhouse Gases Global Warming

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