Zoeken
Zoeken kan via de modus 'eenvoudig zoeken' (één veld) of uitgebreid via 'geavanceerd zoeken' (meerdere velden). Zo kan je bv. zoeken op een combinatie van een auteursnaam (auteur), een jaartal (jaar) en een documenttype.
Boekenmand
Nuttige resultaten kan je aanvinken en toevoegen aan een mandje. De inhoud hiervan kan je exporteren of afdrukken (naar bv. PDF).
RSS
Op de hoogte blijven van nieuw toegevoegde publicaties binnen uw interessegebied? Dit kan door een RSS-feed (?) te maken van jouw zoekopdracht.
nieuwe zoekopdracht
Prey size selection and feeding ecology of an omnivorous invader: Hemimysis anomala
In: Journal of Great Lakes Research. International Association for Great Lakes Research/Elsevier: Buffalo. ISSN 0380-1330
|  |
| Trefwoord |
Hemimysis anomala G.O. Sars, 1907 [WoRMS]
|
| Author keywords |
Prey size selection; Omnivory; Prey detection; Stable isotopes; Light environment |
| Auteurs | | Top |
- Pérez-Fuentetaja, A.
- Wuerstle, J.
|
|
|
| Abstract |
We studied the feeding ecology of the Ponto-Caspian mysid Hemimysis anomala, a recent invader to the Great Lakes that is expanding to other bodies of water. Experimentally we found that H. anomala's prey consumption rates were affected by prey size and by illumination. Juvenile H. anomala fed at similar rates under soft light and darkness, while adults fed more in complete darkness, indicating reliance on different prey-receptors. Small prey was preferred by juvenile and medium-size H. anomala, but large H. anomala also exploited larger prey sizes. Juveniles also consumed a large proportion of algae, but they became more carnivorous as size increased indicating an ontogenetic diet shift from juvenile (4.5 mm length) to young adult (6.5 mm length). Results from field-collected (wild) H. anomala juveniles showed that they consumed similar quantities of algae and zooplankton. The juvenile δ13C corresponded to pelagic algae consumption; however, larger wild H. anomala had enriched δ13C from benthic algae, indicating different habitat utilization than juveniles. The δ15N for the largest wild H. anomala collected was 1‰ above that of juveniles, pointing to an increased reliance on animal food with size. Wild H. anomala also fed on large amounts of detrital material, possibly deriving a nutritional benefit from them. H. anomala is an adaptable organism capable of exploiting pelagic and benthic regions of the littoral zones of lakes. H. anomala preference for small prey puts it in competition with larval fish and could potentially impact both upper and lower trophic levels. |
IMIS is ontwikkeld en wordt gehost door het VLIZ.
