2 documents found, page 1 of 1
Body size is more important than diet in determining stable-isotope estimates o...
Villamarín, Francisco; Jardine, Timothy D.; Bunn, Stuart; Marioni, Boris; Magnusson, William ErnestThe trophic position of a top predator, synonymous with food-chain length, is one of the most fundamental attributes of ecosystems. Stable isotope ratios of nitrogen (δ 15N) have been used to estimate trophic position of organisms due to the predictable enrichment of 15N in consumer tissues relative to their diet. Previous studies in crocodilians have found upward ontogenetic shifts in their 'trophic position'....
Temporal uncoupling between energy acquisition and allocation to reproduction i...
Villamarín, Francisco; Magnusson, William Ernest; Jardine, Timothy D.; Valdez, Dominic G.; Woods, Ryan J.; Bunn, StuartAlthough considerable knowledge has been gathered regarding the role of fish in cycling and translocation of nutrients across ecosystem boundaries, little information is available on how the energy obtained from different ecosystems is temporally allocated in fish bodies. Although in theory, limitations on energy budgets promote the existence of a trade-off between energy allocated to reproduction and somatic g...