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See detailHabitat Choice by Atlantic Salmon Parr in Relation to Turbulence at a Reach Scale
Enders, Eva C; Roy, Mathieu L; Ovidio, Michaël ULg et al

in North American Journal of Fisheries Management (2009), 29(6), 1819-1830

The variables commonly used to describe the physical habitat of Atlantic salmon Salmo salar parr are average velocity, water depth, and substrate. A variety of micro- and mesohabitat models have been ... [more ▼]

The variables commonly used to describe the physical habitat of Atlantic salmon Salmo salar parr are average velocity, water depth, and substrate. A variety of micro- and mesohabitat models have been developed using these variables to assess habitat quality. However, Atlantic salmon parr live in highly turbulent streams and rivers in which intense fluctuations of water velocity occur. Laboratory experiments have shown that turbulence affects the behavior and energetics of fish. Nevertheless, habitat use in relation to the strong temporal variability of velocity in natural environments has rarely been studied. In this study, Atlantic salmon parr habitat was examined in relation to turbulence in the Patapedia River, Quebec. Rather than taking the usual approach of surveying a large population at one point in time, we used an intensive radiotelemetry tracking survey that focused on the habitat use of a few individual fish over an extended period. We analyzed habitat use in relation to several dynamic hydraulic variables. Our results revealed that under naturally turbulent conditions, the parr displayed high individual variability in their habitat use. Such heterogeneous use of habitat suggests that individuals are not constrained to a single habitat type. Furthermore, no differences were observed in habitat use among the four daily periods (dawn, day, dusk, and night) for individual parr. [less ▲]

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See detailHabitat diversity of the Multicolored Asian ladybeetle Harmonia axyridis Pallas (Coleoptera: Coccinellidae) in agricultural and arboreal ecosystems: a review
Vandereycken, Axel ULg; Durieux, Delphine ULg; Joie, Emilie ULg et al

in Biotechnologie, Agronomie, Société et Environnement = Biotechnology, Agronomy, Society and Environment [=BASE] (2012), 16(4), 553-563

The Multicolored Asian ladybeetle, Harmonia axyridis (Pallas), native to Asia, is an invasive species in many European and American countries. Initially introduced as a biological control agent against ... [more ▼]

The Multicolored Asian ladybeetle, Harmonia axyridis (Pallas), native to Asia, is an invasive species in many European and American countries. Initially introduced as a biological control agent against aphids and coccids in greenhouses, this alien species rapidly invaded many habitats such as forests, meadows, wetlands, and agricultural crops. This paper reviews the habitats (forests, crops, herbs, gardens and orchards) where H. axyridis has been observed, either during insect samplings or as part of Integrated Pest Management (IPM) programs. Studies have referenced H. axyridis on 106 plant taxa (35 arboreal species, 21 crop species, 27 herbaceous species, 11 ornamental species, and 12 orchard species) and have identified 89 plant- prey relationships (34 arboreal species, 16 crop species, 13 herbaceous species, 10 ornamental species, and 16 orchard species) in different countries. Harmonia axyridis is more abundant in forest areas, principally on Acer, Salix, Tilia and Quercus, than in agroecosystems. Some plant species, such as Urtica dioica L., which surround crops, contain large numbers of H. axyridis and could constitute important reserves of this alien species in advance of aphid invasions into crops. This review highlights the polyphagy and eurytopic aspect of H. axyridis. [less ▲]

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See detailL’habitat du Néolithique final de Quinssaines, Le Bournadiau : approche spatiale et fonctionnelle d’un site au Nord-Ouest de l’Allier.
Saintot, Sylvie; Linton, Jimmy ULg; Baudais, D. et al

in Bulletin de la Société Préhistorique Française (2011)

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See detailL’habitat mérovingien dans la vallée mosane
Van Wersch, Line ULg

Conference (2004)

Detailed reference viewed: 84 (2 ULg)
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See detailL'habitat ouvrier et social
Frankignoulle, Pierre ULg

in Frankignoulle, Pierre; Dawance, Sophie; Malherbe, Alain (Eds.) Habiter la Ville (2001)

Detailed reference viewed: 38 (8 ULg)
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See detailHabitat partitioning in facultatively paedomorphic populations of palmate newts Triturus helveticus
Denoël, Mathieu ULg

in AMBIO : A Journal of the Human Environment (2005), 34(6), 476-477

Detailed reference viewed: 99 (9 ULg)
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See detailHabitat préférentiel de trois espèces d odontocètes teuthophages en Méditerranée Nord Occidentale.
Praca, Emilie; Gannier, A.; Das, Krishna ULg

Conference (2005)

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See detailHabitat social
Frankignoulle, Pierre ULg

in Van Loo, Anne (Ed.) Dictionnaire de l'architecture en Belgique (2003)

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See detailHabitat use by white-thighed colobus in the Kikélé sacred forest: ativity budget, feeding ecology and selection of sleeping trees
Djègo-Djossou, Sylvie; Koné, I; Fandohan, A.B. et al

in Primate conservation (2015), 29

Abstract: Understanding habitat preference and use is an important aspect of primate ecology, and is essential for setting conservation strategies. This study examined the activity budget, feeding ecology ... [more ▼]

Abstract: Understanding habitat preference and use is an important aspect of primate ecology, and is essential for setting conservation strategies. This study examined the activity budget, feeding ecology and selection of sleeping trees of a population of white-thighed colobus (Colobus vellerosus). A group of 18 was followed during 72 days over a full annual cycle in the Kikélé Sacred Forest of the Bassila administrative region in central Benin (West Africa). Activity budget and diet were determined using scan sampling. The structure of the habitat and the physical characteristics of sleeping trees were determined using plot surveys. Resting, feeding, moving, social interactions and other activities accounted for 56.6%, 26.3%, 13.0%, 3.3%, and 0.7% of the activity budget, respectively. The group spent more time feeding and less time moving in the dry season compared to the rainy season. The diet was composed of 35 plant species belonging to 16 families, with items including leaves, fruits, seeds, buds, bark, flowers, gum, and inflorescences. Only three tree species were used as sleeping trees: Celtis integrifolia, Cola cordifolia, and Holoptelea grandis. Our findings suggest that the monkeys prefer tall (22.53 ± SD 3.76 m) and large-trunked (112.07 ± SD 14.23 cm) sleeping trees. The results of this study can be used for sound management of the white-thighed colobus in the study area and elsewhere. [less ▲]

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See detailHabitat use of a population of bottlenose dolphins, Tursiops truncatus gephyreus, analyzed by means of Kernel Density Estimation (KDE) method
Cransveld, Alice ULg; Denoël, Mathieu ULg; Das, Krishna ULg et al

Poster (2014, April 09)

The San Antonio Bay (SAB), in Patagonia, Argentina, harbors a resident population of bottlenose dolphins (Tursiops truncatus gephyreus). It seems a privileged area to give birth and nurse calves. In the ... [more ▼]

The San Antonio Bay (SAB), in Patagonia, Argentina, harbors a resident population of bottlenose dolphins (Tursiops truncatus gephyreus). It seems a privileged area to give birth and nurse calves. In the context of declining populations worldwide and more particularly in South America, preserving the SAB population takes a considerable significance. Yet the SAB is facing human population growth and touristic development, which represent potential threats for the dolphin population, especially dolphin-watching activities. In this context, the aim of this study was to understand the bottlenose dolphin’s habitat use within the bay, and to consider how this information could be used in prospective management strategies. Particularly, we aimed at using the Kernel Density Estimation (KDE) method to map the intensity of space use for essential behavioural patterns. To this end, we collected behavioural information on dolphins during 25 boat-based surveys in the bay in 2011. The habitat use of the bay was heterogeneous: some areas were more intensely used than others. Dolphins spent most of their time traveling and diving. Variables associated to resting behaviours, e.g. school size and depth, indicated that the SAB would be a safer place compared to other known residency areas, confirming its suitability for conservation purposes. KDE analyses showed that behaviours are not evenly distributed inside the bay. Bottlenose dolphins being more sensitive to anthropogenic disturbances while engaged in resting or socializing behaviours, it is crucial to locate these behaviours. In SAB, the KDE shows that resting and socializing areas are located in the Northern part of the bay, indicating that it should constitute a priority protected area in potential future management strategies. Furthermore, our results show that the KDE method is an appropriate and advantageous tool when determining critical habitats, worth being more widely used. [less ▲]

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See detailHabitat use of juvenile Atlantic salmon (Salmo salar): the relation between physical variables and individual mobility.
Roy, Mathieu; Ovidio, Michaël ULg; Enders, Eva et al

Conference (2005, May)

Detailed reference viewed: 14 (3 ULg)
See detailL’habitation de l’avenir : Le logement évolutif
Schmitz, Dimitri ULg

Conference given outside the academic context (2012)

Detailed reference viewed: 34 (3 ULg)
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See detailHabitations et territoires
Noiret, Pierre ULg

in Otte, Marcel (Ed.) Les Aurignaciens (2010)

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See detailHabitats du Néolithique ancien à Vaux-et-Borset
Caspar, Jean-Paul; Delye, Emmanuel ULg; Bit, Richard et al

in Actes de la journée d'archéolohie en Province de Liège (1996)

Detailed reference viewed: 10 (1 ULg)