Rahman, M.M., Verdegem, M.C.J., Nagelkerke, L.A.J., Wahab, M.A., Milstein, A., Verreth, J.A.J.
The effects of introducing common carp (CC) and of adding artificial feed to fertilized rohu ponds on water quality and nutrient accumulation efficiency were studied. All ponds were stocked with 15...
Rahman, M.M., Nagelkerke, L.A.J., Verdegem, M.C.J., Wahab, M.A., Verreth, J.A.J.
We examined the influence of addition of common carp (Cyprinus carpio) and artificial feed in rohu (Labeo rohita) ponds. We analyzed the relationships among four datasets on different components of...
Roles of ponds in integrated agriculture-aquaculture systems (2007)
Muendo, P.N., Stoorvogel, J.J., Verdegem, M.C.J., Gamal, E-N., Verreth, J.A.J.
Uddin, S., Rahman, S.M.S., Azim, M.E., Wahab, M.A., Verdegem, M.C.J., Verreth, J.A.J.
The present research investigated the effect of stocking density on pond (75 m2, depth 1.2 m) production of Nile tilapia (Oreochromis niloticus) and freshwater prawn (Macrobrachium rosenbergii)...
Uddin, S., Farzana, A., Fatema, M.K., Azim, M.E., Wahab, M.A., Verdegem, M.C.J.
The effects of periphyton grown on bamboo substrate, on growth and production of Nile tilapia, Oreochromis niloticus (Genetically Improved Farmed Tilapia strain) in monoculture and polyculture with...
Nhan, D.K., Phong, L.T., Verdegem, M.C.J., Duong, L.T., Bosma, R.H., Little, D.C.
Promotion of integrated aquaculture with agriculture, including crops and livestock (IAA-farming), requires consideration of both bio-physical and socio-economic contexts. The major factors...
Livelihood impacts of ponds in Asia-opportunities and constraints (2007)
Little, D.C., Karim, M., Turongrouang, Danai, Morales, E.J., Murray, F.J., Barman, B.K., ...
Shamsul, Kabir M., Wahab, M.A., Arjinkit, Chittra, Turongrouang, Danai, Bosma, R.H., Verdegem, M.C.J.
Aquacultuuropleidingen in Nederland: wat, waar en hoe? (2007)
Verdegem, M.C.J., Scheerboom, J., Heringa, J., Goldsborough, D., Schlaman, G.L.H.
Hari, B., Kurup, B.M., Varghese, J.T., Schrama, J.W., Verdegem, M.C.J.
Water quality and shrimp production were monitored in extensively managed ponds which were fed a 25% (P25) or 40% (P40) dietary protein, each diet complemented with or without carbohydrate (CH)...
Stocking density-dependent growth of Dover sole (Solea solea) (2006)
Schram, E., Kamstra, A., Verdegem, M.C.J.
Dover sole were reared at 6 different stocking densities between 0.56 and 12.6 kg/m2 with duplicate tanks for each treatment. The experiment lasted for 55 days. Water quality effects on growth were...
Muendo, P.N., Milstein, A., Dam, A., Gamal, N.E., Stoorvogel, J.J., Verdegem, M.C.J.
Reports of similar yields in manure and feed-driven tilapia culture environments raise questions on food utilization in these environments. The possibility that similar production rates are because...
Rahman, M.M., Verdegem, M.C.J., Nagelkerke, L.A.J., Wahab, M.A., Milstein, A., Verreth, J.A.J.
An experiment was carried out in 18 earthen ponds to investigate the effects of the addition of common carp Cyprinus carpio (L.) and artificial feed on natural food availability, food utilization and...
Reducing water use for animal production through aquaculture (2006)
Verdegem, M.C.J., Bosma, R.H., Verreth, J.A.J.
Animals fed formulated diets indirectly consume large quantities of water. Globally, about 1.2 m3 of water is needed to produce 1 kg of grain used in animal feeds. Cattle in feedlots consume about 7...
Decomposition of high protein aquaculture feed under variable oxic conditions (2006)
Torres Beristain, B., Verdegem, M.C.J., Kerepeczki, E., Verreth, J.A.J.
The microbial decomposition of nitrogen-rich organic matter in aquaculture ponds is affected by the oxic-anoxic conditions gradient at the soil¿water interface as well as by resuspension practices....
Uddin, S., Azim, M.E., Wahab, M.A., Verdegem, M.C.J.
The production performance of genetically improved farmed tilapia (GIFT, Oreochromis niloticus) and freshwater prawn (Macrobrachium rosenbergii) in periphyton-based systems were studied in farmers'...
Nhan, D.K., Milstein, A., Verdegem, M.C.J., Verreth, J.A.J.
A participatory on-farm study was conducted to explore the effects of food input patterns on water quality and sediment nutrient accumulation in ponds, and to identify different types of integrated...
Monitoring invang mosselzaad met collectoren in de Waddenzee (Doove Balg) (2005)
Kamermans, P., Jol, J.G., Breen, V.P., Brummelhuis, E.B.M., Verdegem, M.C.J.
Jiménez-Montealegre, R., Verdegem, M.C.J., Verreth, J.A.J.
In aquaculture, ponds with high loads of organic inputs, organic matter accumulates at the bottom over time. Uneaten feed, senescent phytoplankton and faeces are the principal sources of accumulated...
Nitrogen budget and fluxes in Colossoma macropomum ponds (2005)
Jiménez Montealegre, R.A., Avnimelech, Y., Verreth, J.A.J., Verdegem, M.C.J.
This study quantified the accumulation of nitrogen (N) in the water column, sediments, fish and seepage water during a production cycle of Colossoma macropomum. By combining estimates of the...
Periphyton-based aquaculture production: an ecological approach (2005)
Azim, M.E., Wahab, M.A., Verdegem, M.C.J., Beveridge, M.C.M., Little, D.C., ...
The expansion of aquaculture must be accomplished by promoting an ecological aquaculture model which brings not only the technical aspects of eco-systems design and ecological principles to...
Similarities between microbial and periphytic biofilms in aquaculture systems (2005)
Verdegem, M.C.J., Eding, E.H., Sereti, V., Munubi, R.N., Santacruz-Reyes, R.A.
Little, D.C., Karim, M., Wahab, M.A., Verdegem, M.C.J., Dang, L.N., Le Thanh, D., ...
Excavated earthen ponds in tropical rain-fed farming systems are typically characterised, and promoted, as culture systems for around which whole-farm nutrient can be more efutilised. Research sites...
Mogelijkheden voor zeecultuur in nieuwe getijdennatuur langs de Westerschelde (2004)
Brandenburg, W.A., Kamermans, P., Steenbergen, J., Verdegem, M.C.J.
Effects of carbohydrate addition on production in extensive shrimp culture systems (2004)
Hari, B., Kurup, B.M., Varghese, J.T., Schrama, J.W., Verdegem, M.C.J.
One indoor and one on-farm trial were conducted to evaluate the effect of control of carbon/nitrogen ratio (C/N ratio) by addition of carbohydrate to the water column in extensive types of shrimp...
Keshavanath, P., Gangadhar, B., Ramesh, T.J., Beveridge, M.C.M., Verdegem, M.C.J.
Periphyton growing on artificial substrates can increase the production of herbivorous fish in aquaculture ponds. Periphyton may be an alternative or a complement for supplemental feed in fingerling...
The effect of periphyton substrate density on production in freshwater polyculture ponds (2004)
Azim, M.E., Wahab, M.A., Biswas, P.K., Aseada, T., Fujino, T, Verdegem, M.C.J.
Azim, M.E., Rahaman, M.M., Wahab, M.A., Asaeda, T., Little, D.C., Verdegem, M.C.J.
A bioeconomic study of periphyton-based aquaculture in Bangladesh was carried out through comparison of on-farm and on-station trials. Five treatments, three on-farm and two on-station, each with...
Sediment accumulation in fish ponds:its quality and quantity as a crop fertilizer (2004)
Muendo, P.N., Stoorvogel, J.J., Elnaggar, G.E., Milstein, A., Verdegem, M.C.J.
Azim, M.E., Verdegem, M.C.J., Beveridge, M.C.M.
The study was carried out to quantify the periphyton biomass developed on glass substrates over time, to investigate the effects of periphyton quantity and fish size on the ingestion rate by fish,...