Area of interest
The broad interests of Roel Maas is in the field of nutrition. He is especially interested in the role and effect of nutrition on the performance, gut microbiota and health of the fish.
In October 2015 Roel started as a PhD-student at Wageningen UR. The NWO funded project he is involved in is entitled Green aquafeeds: unlocking non-starch polysaccharides to improve feed utilization and probiotic benefits. In this project he anticipates on the trend in aquaculture of partially replacing fish meal by plant protein in aquaculture feeds, thereby increasing the level of non-starch polysaccharides (NSP, fibres) in the diet. The project will assess the interplay between dietary NSPs, exogenous enzymes and probiotics by looking into NSP breakdown, fermentation products, and into microbiota composition and shifts. Knowledge generated through the project will allow to develop the concept of administering enzymes and probiotics to improve gut health and its microbiota while improving nutrient use efficiencies and minimizing pollution.
Before Roel started his PhD he obtained his Master in Aquaculture and Marine resource Management at the Aquaculture and Fisheries group. During this master he studied the phosphorus requirements in rainbow trout (Oncorhynchus mykiss) at Wageningen University and for a second thesis the effect of dissolved oxygen concentration on the diet preference of rainbow trout (Oncorhynchus mykiss) at INRA, France. Before his current position as PhD-candidate, Roel worked as fish husbandry technician on a salmon hatchery at the Shetland Islands, Schotland.
Aquaculture and Fisheries Group
PO Box 338
6700 AH Wageningen, The Netherlands