Protein and lysine requirements for maintenance and tissue accretion in Atlantic salmon (Salmo sa... more Protein and lysine requirements for maintenance and tissue accretion in Atlantic salmon (Salmo salar L.) fry
S'il est une problématique délicate et controversée, c'est bien celle des (r)empoissonnem... more S'il est une problématique délicate et controversée, c'est bien celle des (r)empoissonnements ou repeuplements en poissons des lacs, rivières et ruisseaux. Pointés du doigt par les uns comme une pratique non durable voire néfaste visant à satisfaire le seul plaisir de quelques pêcheurs, et par les autres comme un moyen essentiel de soutien à la pêche ou à la restauration de nos populations piscicoles en difficulté démographique, les empoissonnements échappent souvent à une analyse rationnelle
water Table1. Average nutrient concentration in pond water Ecological intensification of fish pro... more water Table1. Average nutrient concentration in pond water Ecological intensification of fish production : Fertilization strategies in Africa fish farms Patrick Mafwila 1,2, Bienvenu Kambashi 2, Jacques Mafwila 2, Denis Dochain 3, Rollin Xavier 3and Jérôme Bindelle 1 1University of Liege, Gembloux Agro-Bio Tech, Animal Science Unit, Gembloux, 2University of Kinshasa, Faculty of Agricultural Sciences, Kinshasa, R.D.Congo 3University catholique of Louvain
Long-term monitoring of yellow- and glass eel stages were performed in upland areas (>300km fr... more Long-term monitoring of yellow- and glass eel stages were performed in upland areas (>300km from sea) in order (i) to quantify the decline of wild yellow eels entering in the Belgian Meuse from the Netherlands; (ii) to follow their upstream individual colonization; and (iii) to analyze the adaptation of young eels stocked as glass eels imported from UK. By monitoring a fish pass from 1992 to 2016, we quantified that the number of ascending eels has declined from n=5613 in 1992 to n=21 in 2016 (3.99%/year) and the mean length of eels has increased (4.1mm/year). During 6-years, upstream individual colonization of eels (2010-2015, n=1371) was followed using fixed RFIDtracking system. Few eels continued to migrate 4 years after tagging (<0.3%) and at >20km upstream (3.7%); and velocity of eels varied between individuals (0.012- 3.1km/day). In a 4-year (2013-2016) monitoring study of restocked glass eels using electrofishing and mobile RFID-tracking campaigns, we observed that eels grew rapidly in upland small brooks and recruitment was better in rivers with high carrying capacity (>15.8%, 2years post-stocking). Restocked eels dispersed in up- and downstream directions with behaviors including sedentary, nomadic and intermediate lifestyles. This suggests stocking as potential management measure to enhance local eel stocks.Peer reviewe
The present experiment investigated whether lysine (Lys) utilization efficiency is affected by di... more The present experiment investigated whether lysine (Lys) utilization efficiency is affected by dietary protein level in rainbow trout when Lys is first limiting in the diet. Eighteen isoenergetic (22.9 MJ digestible energy/kg dry matter (DM)) Lys-deficient diets containing 250, 450 or 650 g ...
Most farms in Sub-Saharan Africa are turning to integrated systems combining aquaculture with pig... more Most farms in Sub-Saharan Africa are turning to integrated systems combining aquaculture with pig farming to address the problem of low farm productivity, Mathematical models can predict the evolution of N pools, which is the major limiting element in both aquatic and terrestrial productions of agricultural in integrated farming, The objectives of this work is to design new integrated systems with improve their stability to various external factors.
A river is an ecosystem where fish fauna represents an important structural element. To re-establ... more A river is an ecosystem where fish fauna represents an important structural element. To re-establish connectivity, it is imperative to allow movement between functional habitats. Due to the hydromorphological complexity of large anthropized rivers and the lack of study techniques that can be used in such environments, relevant data with regard to fish ecology are scarce. On the River Meuse, Belgium, at a point 323 km upstream from the North Sea, the Lixhe hydroelectric dam is equipped with two fishways. Both were continuously monitored using capture traps for 20 consecutive years (from 1999 to 2018), representing 4151 monitoring events. The objectives of the present study were to describe the overall abundance and movement indicators of mainly holobiotic potamodromous fish species and to analyse their temporal evolution. We captured 388,631 individuals (n = 35 fish species) during the 20 years of fishway monitoring; 22.7% were adults (>75% of which were cyprinids), and 83.3% juve...
Protein and lysine requirements for maintenance and tissue accretion in Atlantic salmon (Salmo sa... more Protein and lysine requirements for maintenance and tissue accretion in Atlantic salmon (Salmo salar L.) fry
S'il est une problématique délicate et controversée, c'est bien celle des (r)empoissonnem... more S'il est une problématique délicate et controversée, c'est bien celle des (r)empoissonnements ou repeuplements en poissons des lacs, rivières et ruisseaux. Pointés du doigt par les uns comme une pratique non durable voire néfaste visant à satisfaire le seul plaisir de quelques pêcheurs, et par les autres comme un moyen essentiel de soutien à la pêche ou à la restauration de nos populations piscicoles en difficulté démographique, les empoissonnements échappent souvent à une analyse rationnelle
water Table1. Average nutrient concentration in pond water Ecological intensification of fish pro... more water Table1. Average nutrient concentration in pond water Ecological intensification of fish production : Fertilization strategies in Africa fish farms Patrick Mafwila 1,2, Bienvenu Kambashi 2, Jacques Mafwila 2, Denis Dochain 3, Rollin Xavier 3and Jérôme Bindelle 1 1University of Liege, Gembloux Agro-Bio Tech, Animal Science Unit, Gembloux, 2University of Kinshasa, Faculty of Agricultural Sciences, Kinshasa, R.D.Congo 3University catholique of Louvain
Long-term monitoring of yellow- and glass eel stages were performed in upland areas (>300km fr... more Long-term monitoring of yellow- and glass eel stages were performed in upland areas (>300km from sea) in order (i) to quantify the decline of wild yellow eels entering in the Belgian Meuse from the Netherlands; (ii) to follow their upstream individual colonization; and (iii) to analyze the adaptation of young eels stocked as glass eels imported from UK. By monitoring a fish pass from 1992 to 2016, we quantified that the number of ascending eels has declined from n=5613 in 1992 to n=21 in 2016 (3.99%/year) and the mean length of eels has increased (4.1mm/year). During 6-years, upstream individual colonization of eels (2010-2015, n=1371) was followed using fixed RFIDtracking system. Few eels continued to migrate 4 years after tagging (<0.3%) and at >20km upstream (3.7%); and velocity of eels varied between individuals (0.012- 3.1km/day). In a 4-year (2013-2016) monitoring study of restocked glass eels using electrofishing and mobile RFID-tracking campaigns, we observed that eels grew rapidly in upland small brooks and recruitment was better in rivers with high carrying capacity (>15.8%, 2years post-stocking). Restocked eels dispersed in up- and downstream directions with behaviors including sedentary, nomadic and intermediate lifestyles. This suggests stocking as potential management measure to enhance local eel stocks.Peer reviewe
The present experiment investigated whether lysine (Lys) utilization efficiency is affected by di... more The present experiment investigated whether lysine (Lys) utilization efficiency is affected by dietary protein level in rainbow trout when Lys is first limiting in the diet. Eighteen isoenergetic (22.9 MJ digestible energy/kg dry matter (DM)) Lys-deficient diets containing 250, 450 or 650 g ...
Most farms in Sub-Saharan Africa are turning to integrated systems combining aquaculture with pig... more Most farms in Sub-Saharan Africa are turning to integrated systems combining aquaculture with pig farming to address the problem of low farm productivity, Mathematical models can predict the evolution of N pools, which is the major limiting element in both aquatic and terrestrial productions of agricultural in integrated farming, The objectives of this work is to design new integrated systems with improve their stability to various external factors.
A river is an ecosystem where fish fauna represents an important structural element. To re-establ... more A river is an ecosystem where fish fauna represents an important structural element. To re-establish connectivity, it is imperative to allow movement between functional habitats. Due to the hydromorphological complexity of large anthropized rivers and the lack of study techniques that can be used in such environments, relevant data with regard to fish ecology are scarce. On the River Meuse, Belgium, at a point 323 km upstream from the North Sea, the Lixhe hydroelectric dam is equipped with two fishways. Both were continuously monitored using capture traps for 20 consecutive years (from 1999 to 2018), representing 4151 monitoring events. The objectives of the present study were to describe the overall abundance and movement indicators of mainly holobiotic potamodromous fish species and to analyse their temporal evolution. We captured 388,631 individuals (n = 35 fish species) during the 20 years of fishway monitoring; 22.7% were adults (>75% of which were cyprinids), and 83.3% juve...
Uploads
Papers