Dietary breadth of the animal protein consumed by riverine communities in the Tapajós National Forest, Brazil

In small-scale human settlements, the acquisition of animal protein is strictly related to subsistence activities, and yours dietary habits are determined by the availability and the selectivity permitted by the diversity of these resources. This study analyzed the consumption of animal protein sources in seven traditional riverine communities of the Tapajos National Forest, located in Eastern Brazilian Amazonia, considering fish, game meat and domestic animals. The analysis of animal protein consumption was based on the assumptions of the diet breadth model and the Optimal Foraging Theory. We compared diet breadths between communities and between rainy and dry seasons. The study focused on seven traditional riverside communities, six of them distributed along the right bank of the Tapajos River and one on the right bank of the Cupari River. Data collection was performed in four fields trips, two in the rainy season (May and July) and two in the dry season (September and November) in 2010. Data were collected through semi-structured interviews where the informant mentioned the source of animal protein consumed in the last three meals and which would be consumed at the next meal, if possible. We carried out a total of 470 interviews, where we documented 1 512 meals, and in only 12% of the meals there was no consumption of any animal protein source. The fish was consumed in 60.4% of the meals, being the most important source of animal protein consumed, differing significantly from other protein sources (χ²=23.79, df=5, p<0.001). A total of 11 species of wild animals and 46 species of fish were consumed. The choice in the consumption of game meat consisted on Tayassu pecari, Hydrochoerus hidrochaeris and Cuniculus paca, while the preference for fish consumption included Plagioscion spp., Astronotus spp., Cichla spp. and Leporinus spp.. The Simpson index did not vary significantly between the rainy and dry season (N=6, t=1.25, p=0.267) or between communities (N=6, t=5, p=0.42), although São Francisco das Chagas have significantly higher consumption of game meat (χ²=370.41, df=25, p<0.001). Fishing is an activity of paramount importance to these communities, and factors that lead to decreased availability of fish may lead to subsequent increase in hunting pressure. For the conservation of preserve of both wildlife natural resources and practices of subsistence of riverine communities of the Tapajós National Forest, it is necessary to ensure the maintenance of fish stocks and the protection of the Tapajós River areas large enough to maintain viable populations of wild animals and more tolerant to hunting and habitat loss.

En pequeños asentamientos rurales, la adquisición de proteína animal está estrechamente relacionada con actividades de subsistencia, y su hábitos alimentares son determinados por la disponibilidad y diversidad de estos recursos. Este estudio examinó el consumo de pescado, caza y animales domésticos en siete comunidades tradicionales ribereñas de la Floresta Nacional do Tapajós, ubicadas en la Amazonia oriental Brasileña. La análisis se basa en los supuestos de modelos de la amplitud de la dieta y la teoría de forrajeo óptimo, se comparó la amplitud de dieta en siete comunidades ribereñas en periodo seco y lluvioso. La recolección de datos se realizó en cuatro viajes, dos en la temporada de lluvias y dos en la estación seca en el 2010, mediante entrevistas semi-estructuradas. El pescado fue consumido en el 60.4% de las comidas, siendo la fuente de proteína animal más consumida. Un total de 11 especies de animales silvestres y 46 especies de pescado fueron documentadas y la preferencia en el consumo cayó sobre T. pecari, C. paca y Hydrochoerus hidrochaeris y la preferencia por el consumo de pescado cayó sobre Plagioscion spp. Astronotus spp., Cichla spp. y Leporinus spp.

Effects of protein quality on appetite and energy metabolism in normal weight subjects / Efeitos da qualidade proteica no apetite e metabolismo energético de indivíduos eutróficos

OBJECTIVE: The purpose of this study was to compare the effects of consumption of different protein sources on food intake and energy expenditure in normal weight subjects. SUBJECTS AND METHODS: Breakfast preparations (casein, soy protein, whey protein or control) were ingested during seven consecutive days. Appetite, food intake, and energy expenditure were assessed. RESULTS: Casein consumption led to a lower energy intake than whey protein. There was lower energy intake on day 7 than on day 1 of the casein session. Soy protein preparations resulted in higher diet induced thermogenesis (DIT) than in control preparations. The respiratory quotient (RQ) obtained in the whey protein session was lower than the control and soy protein sessions. CONCLUSION: These results suggest that the consumption of different protein types leads to distinct effects on satiety (casein), DIT (soy protein), and/or RQ (whey protein).

OBJETIVO: O objetivo deste estudo foi comparar os efeitos do consumo de diferentes fontes proteicas na ingestão alimentar e gasto energético em indivíduos eutróficos. SUJEITOS E MÉTODOS: Preparações (caseína, proteína da soja, proteína do soro de leite ou controle) foram ingeridas no desjejum, durante sete dias consecutivos. RESULTADOS: A caseína resultou em menor ingestão calórica do que o soro de leite. Houve uma menor ingestão calórica no último dia da sessão da caseína em relação ao primeiro dia. Preparações contendo proteína da soja resultaram em maior termogênese induzida pela dieta (TID) em comparação às preparações controle. O cociente respiratório (CR) obtido na sessão do soro de leite foi menor que na sessão controle e da proteína da soja. CONCLUSÃO: Esses resultados sugerem que o consumo de diferentes tipos de proteínas resulta em efeitos distintos na saciedade (caseína), TID (proteína da soja) e/ou CR (proteína do soro).

Adaptación de nutripez a un alimento de humedad intermedia / Adaptation of Nutripez to an intermediante moisture food

El objetivo del trabajo fue adaptar el Nutripez a un producto de humedad intermedia mediante las técnicas de infusión seca y mezclado. En el primer caso, el producto seco salado se sumergió en diferentes soluciones de humectantes en las que se varió la concentración de los solutos, el tiempo y la temperatura de la solución; en el segundo los humectantes se adicionaron directamente a la pulpa de sardina previamente cocida. Los productos obtenidos por ambos métodos se empacaron individualmente en sobres de celopolyal y se almacenaron durante un mes a 25 ñ 2ºC y 34 ñ 3 por ciento HR. Con ambos métodos se obtuvieron productos estables a la rancidez y microbiológicamente aptos para consumo, con una actividad de agua (aW) entre 0,76 y 0,84, un contenido de humedad entre 38 y 42 por ciento y un pH entre 5,5 y 6,0. En la evaluación sensorial de ambos productos se observó preferencia por el producto elaborado por el método de mezclado

Análisis proximal y de aminoácidos del caracol de jardín (Helix aspersa) como alternativa proteínica para el consumo humano / Proximal and aminoacid analysis of the snail (Helix aspersa) as good protein alternative for human consumption

Se determinó el análisis proximal y el contenido de aminoácidos en el caracol de jardín (Helix aspersa). Se realizaron cuatro muestreos aleatorios recolectando un total de 2390 caracoles, mismos que se clasificaron en tres grupos de peso; el primero de 1.0 g a 2.9 g, el segundo de 3.0 g a 4.9 g y el tercero de 5.0 g a 6.9 g. Se efectuó en cada uno de ellos el análisis químico proximal, tanto para base seca al 100 por ciento, como para la base fresca. Los resultados revelaron diferencias altamente significativas (P < .01) para la fracción de proteína cruda (-x1 = 76.75 ñ 0.70 a; -x2 = 70.01 ñ 0.94 b; -x3 = 65.03 ñ 0.41 c) en base seca, y (-x1 = 13.81 ñ 0.40 a; -x2 = 12.41 ñ 0.31 b; -x3 = 11.74 ñ 0.25 c) en base fresca, respectivamente, para los grupos mencionados. El análisis de aminoácidos muestra que los ácidos glutámicos y aspártico se encuentra en mayor cantidad: 7.43 g y 6.11 g por 100 gramos de proteína respectivamente. Se concluye que el consumo del caracol de jardín puede aportar una cantidad adecuada de nutrimentos a la dieta alimenticia del ser humano

Ingesta alimentaria de escolares rurales de la región metropolitana de Chile: un estudio comparativo: 1989 / Food consumption among rural schoolchildren from the metropolitan area of Chile: a comparative study: 1989

A comparative study of dietary intake of a representative sample of 651 rural school children from Chile's Metropolitan Region was carried out between two periods: 1986-1987 and 1989. Standard procedures for 24 hr dietary recall individual interviews were used to collect data. The percentage of adequacy of energy and protein intake was calculated based on FAO/OMS/UNU (1985), and vitamins and minerals according to National Research Council Recommended Dietary Allowances. Socioeconomic status (SES) was measured through Graffar's Modified Method. Statistical procedures included chi-square test, analysis of variance and Student t test. Between 1986-1987 and 1989 not significant difference was found for dietary intake, despite the socioeconomic conditions had improved. Most part of the sample satisfied energy and protein requirements, but approximately 1/3 of the sample presented a low energy intake; the same was observed for protein intake. Protein contributed 12.0% of the dietary energy, fat 23.0% and carbohydrates 65.0%. Animal and vegetable protein intake was found in the proportion 4:6. Dietary intake significantly differed according to age and SES, and deficiencies in calcium, vitamin A, riboflavin and niacin intake were detected in both sexes. These results could be useful for food and nutrition planning related to school feeding programs and nutrition education