- Msc.in water quality management; - Improvements and impact evaluation of aquaculture on water use and quality - Improved resource use efficiency in integrated aquaculture systems.
Supervisors:
Prof. Johan Verreth Marc Verdegem; Jetse Stoorvogel
CoOperators:
Roel Bosma; Le Thanh Duong
Financer:
European Commission
Start date:
19 February 2002
End date:
19 March 2006
Introduction:
The PhD study aims at the overall objective of analysing the role of fish ponds in integrated farming systems in Vietnam. The specific objectives of the study are (1) characterising different existing fish production systems integrated within crop-animal-aquaculture farming systems under different fish production intensities, (2) investigating nutrient budgets in ponds, considering organic carbon (C), nitrogen (N) and phosphorus (P), (3) understanding which principal factors that contribute to sediment accumulation in ponds, and (5) identifying factors related to pond nutrient dynamics and to predict effects of different pond management strategies.
Results:
Integrated aquaculture farming systems are very diverse, depending on physical setting and farm household livelihood strategies. Aquaculture and livestock farming are positively interactive while aquaculture and fruit production are negatively interactive. Adding more manure into ponds in low-input systems and lower water exchange rates significantly increases fish yields and nutrient accumulation in pond bottom.
Articles:
1. Development of "VAC" integrated systems in the Mekong Delta, Vietnam: a view of system and participatory approach; 2. Integrating freshwater aquaculture, crop and animal production in the Mekong Delta, Vietnam: participatory assessment of current situation and issues for sustainable development 3. Effects of pig manure on fish yields and nutrient accumulation in ponds
Graduation date:
03 October 2007
Graduation time and place:
16:00 in the Aula
Title thesis:
The role of a fish pond in optimizing nutrient flows in integrated agriculture-aquaculture farming systems
