The experiment can be improved by counting the number of eggs each pregnant Artemia bears and the number of offspring successfully hatched to further support the hypothesis that females fed a high diet those treated with poor nutrition have higher fecundity than females. More reliable data can be obtained if multiple techniques are used to measure metabolic rate. By measuring the flow of heat from an organism to its surroundings using a calorimeter, a more accurate metabolic rate can be measured (De V. Weir, 1949). The ratio between the amount of food an animal consumes and the amount it excretes can also indicate that animal's metabolic rate (Paradis et al., n.d.). Determining water flow in animals with tritium-labeled water is another valid method for measuring metabolic rates (Paradis et al., n.d.). Recently, researchers have discovered an effect of food restriction on the average lifespan of many organisms, including yeast, worms, flies, and rodents (Bishop, N., & Guarente, L., 2007). Since most heterotrophs have similar physiological mechanisms for utilizing the nutrition obtained, many are also affected by diets with different nutritional levels. Therefore, future experiments can be conducted on other animals with similar protocols; these experiments can be based on other measurable parameters such as average lifespan