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Abstract Living exclusively in trout streams which are very poor in nutrients, freshwater pearl mussels are physiologically adapted to the low food supply by a reduced metabolism. Longevity of these mussels spans decades and life-time fecundity of females is very high (up to 2*108 larvae). Their resource allocation policy favours survival over current reproduction. Reproductive effort (per reproductive...
AbstractRhagoletis alternata is a common tephritid fly in central Europe, whose larvae feed on the hypanthium of rose hips. The resource-consumer system is non-interactive, i.e. the insect has little or no impact on host plant fitness and therefore is not able to influence the rate at which larval food resources are renewed. The system is reactive, since fluctuations in the carrying capacity (hip...
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