The underlying mechanisms of decision-making behaviour are poorly understood. Oviposition site selection (OSS) in the Drosophila melanogaster fruit fly provides a useful system for studying simple decision-making. OSS is influenced by both genetic and environmental variation. Variation of the foraging gene (for) is known to affect OSS. Given a choice of highand low-nutrient oviposition sites, g...

This study aimed to investigate the relationship of nutrient density and diet cost with anemia iron deficiency (ID) in children. Dietary intake data 5- 12-y-old children (n = 578) from three independent studies low-income communities were pooled. Nutrient densities calculated using Rich Foods index Diet index, higher scores indicating more nutrient-dense foods diets. Food prices food used calcu...

microalgal growth curve, after the exponential phase, shows a stationary phase where algalbiomass production is inhibited and remains constant by some factors such as nutrientdepletion and intrinsic behavior. the present study is concerned with evaluating effects ofthe culture medium condition and intrinsic behavior on biomass production by dunaliellatertiolecta. to this end, effect of ph, nutr...

Knowledge of nutrient pathways and their resulting ecological interactions can alleviate numerous environmental problems associated with nutrient increases in both natural and managed systems. Although not unique, coastal systems are particularly prone to complex ecological interactions resulting from nutrient inputs from both the land and sea. Nutrient inputs to coastal systems often spur ulvo...

Dietary energy density is determined by the composition of the diet and the availability of the energy when the diet is consumed. An overall simplification of the energy content of the diet can be misleading because the natural associations of nutrients in foods influence the amounts taken. Methods of food preparation, dietary habit and satiety also influence choice and energy availability. Fat...

The increased abundance of ephemeral algae and corresponding decline in perennial fucoids observed in eutrophic (nutrient-rich) waters could be caused by eutrophication-driven shifts in the competitive relationship between the 2 groups as early as the germling stage. During the initial post-settlement period germlings are exposed to large temporal variations in temperature, which may influence ...

Six crossbred lambs (32+/-2 kg) in a 6 x 6 Latin square design were used to determine the effects of predeprivation diet nutrient density and NaCl content on nutrient losses during periods of feed and water deprivation and nutrient repletion. Treatments consisted of two predeprivation dietary nutrient densities (low [LOW] and moderate [MOD]) and three NaCI intakes (0, 2, or 4 g/d) in a 2 x 3 fa...

An experiment was conducted in nine 200-m2 earthen ponds at the Asian Institute of Technology (AIT), Thailand from 17 July 2003 to 3 March 2004 (230 days). The objectives of the study were to assess the feasibility of co-culture of lotus and hybrid catfish in intensively fed ponds, to assess nutrient recovery from feed waste by lotus plants, to assess pond mud characteristics after lotus-fish c...

To further development of a simplified fertigation system using controlled-release fertilizers (CRF), we investigated the effects of differing levels of fertilizers and plant density on leaf area index (LAI), fruit yields, and nutrient use in soilless tomato cultures with low node-order pinching and high plant density during spring-summer (SS), summer-fall (SF), and fall-winter (FW) seasons. Pl...