Sökning: "ontogenetic diet shift"

Hittade 2 avhandlingar innehållade orden ontogenetic diet shift.

1. 1. The effects of stage-specific differences in energetics on community structure

   Författare :Tim Schellekens; Andre de Roos; Tom Anderson; Umeå universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; ontogenetic diet shift; stage-structured biomass model; food-dependence; growth; development; Earth sciences; Geovetenskap; NATURAL SCIENCES; NATURVETENSKAP; Earth Sciences with Specialization Environmental Analysis; geovetenskap med inriktning mot miljöanalys;

   Sammanfattning : When intraspecific individuals differ in resource intake, scramble competition occurs among inferior individuals growing food-dependently. Scramble can be released through predation mortality. As a consequence of this release, production rates in inferior individuals increase and biomass overcompensation in the subsequent life-stages may occur. LÄS MER

3. 2. Ontogenetic scaling and the development of within-cohort size structure

   Författare :Magnus Huss; Lennart Persson; Pär Byström; David Post; Umeå universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; cannibalism; competition; density-dependence; resource feedbacks; hatching; growth; ontogenetic niche shifts; Perca fluviatilis; size variation; larval fish; Freshwater ecology; Limnisk ekologi; zooekologi; Animal Ecology;

   Sammanfattning : It is increasingly recognized that individuals of the same species differ from each other and influence and respond to their environment in unique ways. This thesis deals with size variation among individuals that not only are of the same species but also of similar age. LÄS MER