Phenethylamine (PEA) and alkylamine (AA) analogues are frequently present in pre-workout food supplements and share structural similarity with amphetamine and the endogenous catecholamines (nor)adrenaline and dopamine, suggesting potential sympathomimetic activity. The present study investigated the vasoactive properties of PEA and AA analogues in isolated Wistar Kyoto rat mesenteric arteries, renal arteries and aorta. Our fin...

Rapid identification of invasive non-native species aids conservation efforts, particularly in threatened and vulnerable species. However, this can be extremely challenging for morphologically similar non-native and native species, especially for those with cryptic coloration and small home ranges. This holds for non-native green iguanas (NNGI; Iguana iguana ), which threaten insular Iguana populations through displacement acr...

Macrobenthic deposit feeders and bacteria compete for the same detrital food resources. We hypothesize that the spatial scale at which food is distributed in the sediment is an important factor determining the outcome of this competition. Macrobenthic deposit feeders are better adapted for fast consumption of food in concentrated patches, whereas diluted food can only be exploited by bacteria. This hypothesis was tested in an...

In contradiction with field observations, theory predicts that the number of coexisting plankton species at equilibrium cannot exceed the number of limiting resources, which is called the “paradox of the plankton”. Recently, Huisman & Weissing (1999 , 2000 ) showed, in a model study, that the number of coexisting species may exceed the number of limiting resources when internal system feedback induces oscillations or chaos. In...