nut of the same size may differ in weight. for example a substantial literature document the intensity of seed predation by insects. as an insect larva bores thought the nut meat, it convert the contents of the nut into larval tissues, faces, and inevitable heat losses through respiration. Those of you who have crack open black walnuts are well aware that a send predator can render the content of a seed useless to a granivore. in addition some of you may be aware that a common and effective way to separate sound beans from infested ones is to toss the beans in a pan of water and throw out the ones that float. in short the presence of seed predators can reduce the quality of the seed for a aconsumer such as a squirrel