References of "Poncin, Pascal"
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See detailModeling the black grouse population : a tool for management.
Loneux, Michèle ULiege; Lindsey, J.; Poncin, Pascal ULiege

Conference (2007)

Detailed reference viewed: 13 (0 ULiège)
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See detailLe tétras lyre dans les Hautes-Fagnes : quarante ans de suivis - dix ans d'actions.
Poncin, Pascal ULiege; Keulen, Christine; Loneux, Michèle ULiege et al

Conference (2007)

Detailed reference viewed: 29 (3 ULiège)
See detailLe tétras lyre dans les Hautes-Fagnes : quarante ans de suivis – dix ans d’actions.
Poncin, Pascal ULiege; Keulen, Ch.; Loneux, Michèle ULiege et al

Article for general public (2007)

Detailed reference viewed: 114 (3 ULiège)
See detailPoissons migrateurs : objectif Meuse.
Hanon, L.; Philippart, Jean-Claude ULiege; Poncin, Pascal ULiege

Article for general public (2007)

Detailed reference viewed: 47 (10 ULiège)
See detailLa reproduction : de la biologie à l’informatique – Introduction générale.
Poncin, Pascal ULiege

in Bulletin de la Société Royale des Sciences de Liège (2007)

Detailed reference viewed: 31 (2 ULiège)
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See detailSchool fish behaviour
Becco, Christophe ULiege; Vandewalle, Nicolas ULiege; Delcourt, Johann ULiege et al

Conference (2006, September)

Detailed reference viewed: 77 (13 ULiège)
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See detailBrown trout fry move inshore at night: a choice of water depth or velocity?
Bardonnet, A.; Poncin, Pascal ULiege; Roussel, J. M.

in Ecology of Freshwater Fish (2006), 15(3), 309-314

The instream positions of brown trout fry differ between daylight and darkness. According to field and laboratory observations, recently emerged 0+ brown trout use shallow and slow-flowing areas close to ... [more ▼]

The instream positions of brown trout fry differ between daylight and darkness. According to field and laboratory observations, recently emerged 0+ brown trout use shallow and slow-flowing areas close to the bank at night and tend to move off-shore during daylight. In laboratory channels, we tested whether the use of habitats close to the river bank could be attributed to a choice of either water depth or velocity. In two complementary experiments, emerging brown trout alevins were given the choice of using shallow-slow or deep-swift habitats (experiment 1), and deep-slow or shallow-swift habitats (experiment 2). At night, a persistent preference for the shallow habitats was displayed, regardless of velocity. It was concluded that swim-up brown trout fry respond to shallowness rather than ambient low water velocity when selecting habitats close to the bank at night. The behavioural significance of this result and implications for river management are discussed. [less ▲]

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See detailExperimental evidences of a structural and dynamical transition in fish school
Becco, Christophe ULiege; Vandewalle, Nicolas ULiege; Delcourt, Johann ULiege et al

in Physica A: Statistical Mechanics and its Applications (2006), 367

We have developed a video tracking system in order to determine all the trajectories of young fish (Oreochromis niloticus L.) within a school. Both individual and collective behaviours have been studied ... [more ▼]

We have developed a video tracking system in order to determine all the trajectories of young fish (Oreochromis niloticus L.) within a school. Both individual and collective behaviours have been studied as a function of the number of fish per unit area. By studying distributions of distances between fish and distributions of relative orientations, structural effects and cooperative motions have been evidenced. Signatures of a phase transition have been found, as predicted by some numerical models. This work opens new perspectives in the study of collective phenomena in biological systems since it is the first time that such measurements are possible. [less ▲]

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See detailComparing the EthoVision 2.3 system and a new computerized multitracking prototype system to measure the swimming behavior in fry fish
Delcourt, Johann ULiege; Becco, Christophe ULiege; Ylieff, Marc ULiege et al

in Behavior Research Methods (2006), 38

Coming from the framework of unmarked fry tracking, we compared the capacities, advantages, and disadvantages of two recent video tracking systems: EthoVision 2.3 and a new prototype of multitracking. The ... [more ▼]

Coming from the framework of unmarked fry tracking, we compared the capacities, advantages, and disadvantages of two recent video tracking systems: EthoVision 2.3 and a new prototype of multitracking. The EthoVision system has proved to be impressive for tracking a fry using the detection by gray scaling. Detection by subtraction has given less accurate results. Our video multitracking system is able to detect and track more than 100 unmarked fish by gray scaling technique. It permits an analysis at the group level as well as at the individual level. The multitracking program is able to attribute a number to each fish and to follow each one for the whole duration of the track. Our system permits the analysis of the movement of each individual, even if the trajectories of two fish cross each other. This is possible thanks to the theoretical estimation of the trajectory of each fish, which can be compared with the real trajectory (analysis with feedback). However, the period of the track is limited for our system (about 1 min), whereas EthoVision is able to track for numerous hours. In spite of these limitations, these two systems allow an almost continuous automatic sampling of the movement behaviors during the track. [less ▲]

Detailed reference viewed: 101 (28 ULiège)
See detailFacteurs influençant l'efficacité des repeuplements. In: Vers une nouvelle politique des rempoissonnements.
Rollin, X.; Poncin, Pascal ULiege

in Vers une nouvelle politique de rempoissonnement (2006)

Detailed reference viewed: 38 (6 ULiège)