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Retention efficiency in oyster Crassostrea gigas exposed to variable food quantity and quality ArchiMer
Barille, Laurent; Prou, Jean; Heral, Maurice; Bougrier, Serge.
Relative retention efficiency (Er%) of Crassostrea gigas was estimated in the laboratory with 7 diets consisting of algae and silt. Total particulates varied from 1.34 mg/l in natural sea water to 27.65 mg/l in natural sea water enriched with silt. It was also calculated from field experiment to get high concentration of seston up to 66 mg/l. It appeared that Crassostrea gigas did not adjust its retention according to the food quality and the gill porosity was controlled by the concentration of particulate matter. In low seston load (1.34 mg/l) the oyster showed no change in retention for particles larger than 3-4 µm (Equivalent Spherical Diameter, ESD) but at the highest concentration (66 mg/l) it could only retain with a maximum efficiency particles...
Tipo: Text Palavras-chave: Crassostrea gigas; Dietary quality; Particle concentration; Physiological model; Retention efficiency.
Ano: 1992 URL: http://archimer.ifremer.fr/doc/00100/21096/18721.pdf
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Self-Perception of Weight and Health and Dietary Quality AgEcon
Lin, Chung-Tung Jordan; Lee, Jonq-Ying.
Tipo: Conference Paper or Presentation Palavras-chave: Perception; Dietary quality; Obesity; Food Consumption/Nutrition/Food Safety.
Ano: 2010 URL: http://purl.umn.edu/61266
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The Impact of Price Intervention Policies to Improve Dietary Quality in Spain AgEcon
Gil, Jose Maria; Angulo, Ana Maria; Mtimet, Nadhem.
Many commentators have claimed that farm subsidies have contributed significantly to the “obesity epidemic” by making fattening foods relatively cheap and abundant and, symmetrically, that taxing “unhealthy” commodities or subsidizing “healthy” commodities would contribute to reducing obesity rates. This paper makes three contributions. First, we review evidence from the literature on the impacts on food consumption and obesity resulting from subsidies applied in the past to production or consumption of farm commodities. Second, we develop and present new arguments and preliminary evidence on the impacts of past government investments in agricultural R&D on food consumption and obesity—through research-induced increases in agricultural productivity and...
Tipo: Conference Paper or Presentation Palavras-chave: Spain; Taxes; Food demand; Dietary quality; Consumer/Household Economics; Demand and Price Analysis; Food Consumption/Nutrition/Food Safety; Health Economics and Policy.
Ano: 2009 URL: http://purl.umn.edu/53337
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THE EFFECT ON DIETARY QUALITY OF PARTICIPATION IN THE FOOD STAMP AND WIC PROGRAMS AgEcon
Wilde, Parke E.; McNamara, Paul E.; Ranney, Christine K..
Participants in the Food Stamp Program consume more meats, added sugars, and total fats than they would in the absence of the program, while their consumption of fruits, vegetables, grains, and dairy products stays about the same. Participants in the Special Supplemental Nutrition Program for Women, Infants, and Children (WIC) consume significantly less added sugars, which may reflect the substitution of WIC-supplied juices and cereals in place of higher sugar soft drinks and cereals. These findings come from a study of low-income Americans using the Continuing Survey of Food Intake by Individuals.
Tipo: Report Palavras-chave: Nutrition assistance programs; Food intake; Dietary quality; Continuing Survey of Food Intake by Individuals (CSFII); Food Consumption/Nutrition/Food Safety; Food Security and Poverty.
Ano: 2002 URL: http://purl.umn.edu/33837
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