References of "Philippart, Jean-Claude"
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See detailLa pêche traditionnelle dans les pleines inondables du fleuve Ouémé au Bénin
Laleyé, Philippe; Akélé, David; Philippart, Jean-Claude ULg

in Cahiers d'Ethologie (2005), 22(2), 25-38

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See detailArtisanal gill-net fishery catches of the catfish, Schilbe intermedius (Tleostei:Schilbeidae), in two tributaries of the Ouémé River, Benin, West Africa
Laleyé, Philippe; Salako, Osmane; Chikou, Antoine et al

in African Journal of Aquatic Science (2005), 30(2), 163-166

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See detailEffects of a micro hydroelectric power plant upon population abundance, mobility and reproduction behaviour of European grayling T. thymallus and brown trout S. trutta in a salmonid river
Ovidio, Michaël ULg; Paquer, Frédéric ULg; Capra, Hervé et al

in Garcia de Jalon, Diego; Vizcaino Martinez, Pilar (Eds.) International Symposium on Ecohydraulics. Aquatic habitat: Analysis & Restoration (2004)

This study examines the potential effects of a new micro hydroelectric power plant (MHPP) on the behaviour (habitat use, movements) and population abundance of European grayling (T. thymallus) and brown ... [more ▼]

This study examines the potential effects of a new micro hydroelectric power plant (MHPP) on the behaviour (habitat use, movements) and population abundance of European grayling (T. thymallus) and brown trout (S. trutta) in the Lhomme (Belgian Ardennes). Thirteen grayling and five brown trout were captured before their spawning period and were manually radio-tracked up to 6 times a week. Population density and biomass were estimated into two different sampling sectors with electric fishing, before and after the MHPP started up. The mobility patterns of grayling and trout in the reach of the river Lhomme influenced by the MHPP strongly contrasted with results obtained in an undisturbed river of the same type in the Belgian Ardennes. Movements were mostly restricted and rarely increased during the spawning period. Spawning took place, but was disturbed by hydropeakings. The population biomass of grayling and trout decreased by 61 % and 23 % respectively, five months after the start-up of the MHPP exploitation. [less ▲]

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See detailSpawning movements of European grayling Thymallus thymallus in the River Aisne (Belgium)
Ovidio, Michaël ULg; Parkinson, Denis; Sonny, Damien et al

in Folia Zoologica (2004), 53(1), 87-98

In three consecutive years (1998 to 2000), 20 adult grayling Thymallus thymallus (L.) (FL +/- SD: 326 +/- 43 mm) were radio-tracked during circum reproduction period (February to May) in the River Aisne ... [more ▼]

In three consecutive years (1998 to 2000), 20 adult grayling Thymallus thymallus (L.) (FL +/- SD: 326 +/- 43 mm) were radio-tracked during circum reproduction period (February to May) in the River Aisne, Belgium. Before the spawning period, grayling remained consistently in the pool-riffle sequence in which they had been captured. Pre-spawning migration time extended from 7 to 29 March. Distances travelled during the spawning migration ranged from 70 to 4980 in (mean +/- S.E.: 1234 +/- 328 m). Spawning migrations stalled under conditions of decreasing water level and increasing water temperature in a thermal range (daily mean Tdegrees) from 5 to 8 degreesC. Spawners remained from 1 to 31 days (mean +/- S.D.: 10.4 +/- 9.8 days) at the spawning grounds and performed a post-spawning homing from 28 March to 18 April in decreasing water flow and in a thermal range (daily mean Tdegrees) from 7 to 11 degreesC. This study demonstrates that migration patterns of grayling are similar between years, but with a timing adjusted as a response to annual variations of the hydroclimatic conditions. [less ▲]

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See detailETUDE DE LA REPARTITION SPATIALE ET DE LA DENSITE DE POPULATION DU HERON CENDRE DANS LA BASSE OURTHE AU PRINTEMPS 2004 COMME BASE A L'ESTIMATION DE LA PRESSION DE PREDATION EXERCEE SUR LE PEUPLEMENT DE POISSONS.
Philippart, Jean-Claude ULg; Poncin, Pascal ULg; Delcourt, Johann ULg

Report (2004)

En complément de l'étude approfondie du comportement de prédation du héron cendré sur le site hyper-attractif de la Meuse en aval du barrage de Lixhe, nous avons porté notre attention sur un tronçon de la ... [more ▼]

En complément de l'étude approfondie du comportement de prédation du héron cendré sur le site hyper-attractif de la Meuse en aval du barrage de Lixhe, nous avons porté notre attention sur un tronçon de la basse Ourthe entre Liège et Esneux où viennent s'alimenter au printemps des hérons probablement attachés à l'importante Colonie de Colonster. Dans ce milieu, l'objectif était de recenser les hérons selon une méthodologie standardisée : i) à différentes dates pendant la période de reproduction de l'espèce à Colonster qui s'étale de mars à mai et ii) en tenant compte de l'hétérogénéité du milieu au point de vue du degré d'antropisation et des possibilités d'expression par les hérons du répertoire des comportements de pêche typiques et atypiques mis en évidence dans la Meuse à Lixhe. [less ▲]

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See detailLE COMPORTEMENT DE PREDATION DU HERON CENDRE DANS LA MEUSE EN AVAL DU BARRAGE DE LIXHE EN MARS -MAI 2004
Philippart, Jean-Claude ULg; Poncin, Pascal ULg; Delcourt, Johann ULg

Report (2004)

Au printemps, la Meuse en aval du barrage de Visé-Lixhe (fig. 1) est un important lieu d'alimentation des hérons cendrés vraisemblablement attachés à la héronnière de Lanaye (une cinquantaine de couples ... [more ▼]

Au printemps, la Meuse en aval du barrage de Visé-Lixhe (fig. 1) est un important lieu d'alimentation des hérons cendrés vraisemblablement attachés à la héronnière de Lanaye (une cinquantaine de couples reproducteurs en 2004; voir Annexe 1) située en aval et à celle de Vivegnis située en amont (Jacobs et al., 2003). Par ailleurs, le site de Lixhe offre des conditions d'observation exceptionnelles pour réaliser une étude détaillée du comportement de prédation de l'espèce. C'est ce type d'étude qui a été entreprise au printemps 2004 avec un double objectif: d'une part, améliorer les connaissances sur la biologie du héron cendré dans nos régions, notamment en terme d'écologie comportementale (répertoire des comportements alimentaires, relations prédateurs-proies, incidence sur le peuplement en poissons) et, d'autre part, tester une méthodologie d'étude transposable à des sites comparables et spécialement à des piscicultures. [less ▲]

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See detailLong range seasonal movements of northern pike (Esox lucius L.) in the barbel zone of the River Ourthe (River Meuse basin, Belgium).
Ovidio, Michaël ULg; Philippart, Jean-Claude ULg

Conference (2003, June)

In order to study the annual activity cycle and reproductive ecology of northern pike (Esox lucius L.) in the River Ourthe (Belgian Ardenne), 6 fish (579-742mm FL, 1605-4090g, 2 females and 4 males) were ... [more ▼]

In order to study the annual activity cycle and reproductive ecology of northern pike (Esox lucius L.) in the River Ourthe (Belgian Ardenne), 6 fish (579-742mm FL, 1605-4090g, 2 females and 4 males) were captured by electric fishing in November 2000 and January 2001. They were surgically implanted with a radio-transmitter and tracked for 149 to 349 days in a 30-km river stretch. During the pre-spawning period in winter, most movements were between distinct holding areas spaced from 40 to 550 m. All the pike began the upstream spawning migration between 8 February and 30 March 2001, when the mean water temperature varied from 6.7°C to 8.7 °C and the water flow from 52 to 199 m3s-1. The six pike travelled upstream, over distances ranging from 0.75 km to 15.7 km to reach their potential spawning sites. Pike arrived on their potential spawning sites between the 13 February and the 02 April 2001 and remained there from 5 to 25 days when the daily mean water temperature ranged from 2.9 to 10.0 °C. The six pike moved downstream after spawning and showed similar behaviour to those observed prior to spawning, but the distances between holding areas were more extended than during the winter pre-spawning period. When considering the entire tracking period, the longitudinal extension of the activity domains ranged 1 421 to 24 798 m (mean 12,050 m). This exploratory study provided original observations on northern pike movements in a barbel zone of the River Meuse basin. Results contrasted with the widely established view of pike being a sedentary predator and provides data on its behaviour throughout the annual cycle. [less ▲]

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See detailCaractérisation et utilisation du micro-habitat du saumon atlantique (Salmo salar) selon la stucture turbulente del'écoulement.
Brown, Julie; Boyer, Claudine; Enders, Eva et al

Conference (2003, May)

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See detailEtudes des impacts hydrauliques, sédimentologiques et écologiques liés aux travaux hydrauliques sur la Semois
Gob, Frédéric; Houbrechts, Geoffrey ULg; Mols, Julien et al

in Belgeo (2003), 3

Cette étude tente d’évaluer les impacts des dragages réalisés dans le bassin de la Semois (Ardenne). Cette étude interdisciplinaire se penche sur les aspects hydrauliques, environnementaux ... [more ▼]

Cette étude tente d’évaluer les impacts des dragages réalisés dans le bassin de la Semois (Ardenne). Cette étude interdisciplinaire se penche sur les aspects hydrauliques, environnementaux, géomorphologiques et sédimentologiques. [less ▲]

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See detailThe impact of small physical obstacles on upstream movements of six species of fish - Synthesis of a 5-year telemetry study in the River Meuse basin
Ovidio, Michaël ULg; Philippart, Jean-Claude ULg

in Hydrobiologia (2002), 483(1-3), 55-69

In the course of the 'Meuse Salmon 2000' programme, most weirs and dams (3-8 m in height) in the regulated River Meuse have been progressively equipped with new fishways in order to restore the free ... [more ▼]

In the course of the 'Meuse Salmon 2000' programme, most weirs and dams (3-8 m in height) in the regulated River Meuse have been progressively equipped with new fishways in order to restore the free circulation of all amphibiotic fish species. Nevertheless, fish entering into major spawning tributaries are still confronted with various kinds of physical obstacles of which the overall impact on fish migration has never been investigated. In order to test their ability to negotiate physical obstacles, 128 individuals of fish ( Salmo trutta, Thymallus thymallus, Salmo salar, Chondrostoma nasus, Barbus barbus and Esox lucius) were captured several weeks before their spawning migrations and tagged with radio-transmitters. They were tracked from 30 to 466 days in the River Ourthe and six spawning tributaries over the period October 1995 to June 2001. All obstacles recorded in this study have been classified according to their type and main characteristics (i.e. slope, length and height). Results indicated that most fish migrate during or outside the spawning period and that some small obstacles are not as insignificant as initially thought and can significantly disrupt and/or obstruct their upstream movements. There is a need to harmonize interests in the sustainable conservation of fish populations and the development of small-scale hydropower generation and tourism. [less ▲]

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See detailSeasonal variations of activity pattern of brown trout (Salmo trutta) in a small stream, as determined by radio-telemetry
Ovidio, Michaël ULg; Baras, Etienne; Goffaux, D. et al

in Hydrobiologia (2002), 470(1-3), 195-202

Nine brown trout (27.9-42.8 cm FL, 234-995 g) from the Aisne stream (Belgian Ardenne) were tagged with surgically implanted radio transmitters, and their activity patterns were studied at 10-min intervals ... [more ▼]

Nine brown trout (27.9-42.8 cm FL, 234-995 g) from the Aisne stream (Belgian Ardenne) were tagged with surgically implanted radio transmitters, and their activity patterns were studied at 10-min intervals during twenty-six 24-h cycles from October 1995 to May 1997. The duration and intensity of activity were mainly proportional to water temperature and day length but some differences appeared between individuals. The daily home range in summer was also 3.2 times longer than in winter, and was exploited 2.5 times more intensively. At all seasons, trout were most active at dusk, and seasonal variations in diel patterns consisted mainly in a progressive shift from more crepuscular activity in autumn and winter to more homogenous and intensive activity during spring and summer, but still with a predominance of activity at dusk. This relative consistency of activity rhythm throughout the year was interpreted within the context of foraging risk and efficiency, in view of the scarcity of predators in the Aisne stream, and of drifting macroinvertebrates being consistently more abundant at dusk at all times of the year. However, activity patterns varied substantially between individuals living in different microhabitats, including when fish were investigated on the same day. This suggests that activity patterns are also subordinated to local factors such as habitat structure or abundance of drifting prey. [less ▲]

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See detailThe role of aquaculture in fish conservation : a case study of Barbus barbus in Belgium.
Poncin, Pascal ULg; Philippart, Jean-Claude ULg

in Collares-Pereira, M. J.; Coelho, M. M.; Cowx, I. G. (Eds.) Conservation of Freshwater Fishes : Options for the Future. (2002)

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