References of "Libois, Roland"
     in
Bookmark and Share    
Full Text
See detailAtlas provisoire des mammifères sauvages de Wallonie: distribution, ecologie, ethologie, conservation
Libois, Roland ULg

in Cahiers d'Ethologie (1982), 2(suppl. 1-2), 1-207

Methods, status of the wild mammals, threatened species: hedghog, bagder, otter, pine marten, stone marten, beaver, common dormouse, edible dormouse, hamster, hare, wildboar, red deer, fallow deer ... [more ▼]

Methods, status of the wild mammals, threatened species: hedghog, bagder, otter, pine marten, stone marten, beaver, common dormouse, edible dormouse, hamster, hare, wildboar, red deer, fallow deer. Problems: hunting, habitat alteration, pollution... Solutions: better legislation, habitat restoration, education... [less ▲]

Detailed reference viewed: 58 (3 ULg)
Full Text
See detailQuel avenir pour la loutre en Belgique ?
Libois, Roland ULg; Philippart, Jean Claude; Rosoux, René et al

in Cahiers d'Ethologie (1982), 2(1), 1-15

After de Selys Longchamps (1842), the otter in Belgium was a widespread species along all the full of fish rivers and was regarded as a pest namely in the fishponds of the Campine. This animal becomes ... [more ▼]

After de Selys Longchamps (1842), the otter in Belgium was a widespread species along all the full of fish rivers and was regarded as a pest namely in the fishponds of the Campine. This animal becomes extremely rare now: in Wallony, we only recorded one place where cubs are reared every year. The main reasons for this steep population decrease are well known: i. the otter has been systematically destroyed by hunters, fishermen and trappers who were receiving bounties till 1965 ! ii. the water pollution and the radical changes of the rivers physical characteristics (dredging, straightening and reshaping the river beds or banks) have had disastrous effects on fish, the main food resource of the otter. iii. a lot of previous suitable habitats have been destroyed due to for example draining of swamps and marshes and concreting the river banks. A comprehensive study of the fish populations in Wallony reveals that a small number of streams are still inhabited by relatively undamaged fish communities. Most freshwaters are polluted at different levels, some in a chronic way, others irregularly and many of them have been damaged by hydraulic works so becoming unsuitable for the otters because of a drastic reduction of their fish biomass. In such circumstances it seems likely that we cannot be really optimistic as far as the otter's future in our country is concerned. The last places where otters can still be found today must be inconditionnally protected against every disturbance of whatever type; but those measures will only help if a strong program is undertaken without delay intending to improve the water quality. An educational campaign is also urgently needed. [less ▲]

Detailed reference viewed: 21 (1 ULg)
Full Text
Peer Reviewed
See detailLe hamster commun (Cricetus cricetus L.) en Belgique: statut actuel et ancien des populations
Libois, Roland ULg; Rosoux, René

in Belgian Journal of Zoology (1982), 112(2), 227-236

Fossif remains of hamsters from the late Pleistocene were found in Belgium. But this animal seems to have disappeared between that period and the mid 19th century. When again registrated it was only found ... [more ▼]

Fossif remains of hamsters from the late Pleistocene were found in Belgium. But this animal seems to have disappeared between that period and the mid 19th century. When again registrated it was only found in the "le pays de Herve" between Herve and Limbourg. Then it progressively reached the center of Brabant, the westernmost part of its range. In the early 20th century, hamsters were so numerous that people were going through an aradication campaign to prevent the damaging of their crops. However, we believe that the major reasons of its present scarcity were the sound modifications of the agricultural technology and landscape (mechanization, regrouping of land, deep ploughing after the harvest...) Hamsters live now in Hesbaye, the Pays de Herve and in the east of Brabant. But they are so few that it appears to take some conservation measures [less ▲]

Detailed reference viewed: 55 (1 ULg)
Full Text
Peer Reviewed
See detailMyotis bechsteini en Corse
Libois, Roland ULg; Vranken, Martin

in Mammalia (1981), 45(3), 380-381

Detailed reference viewed: 4 (1 ULg)
Full Text
See detailAndenne: un exemple à suivre !
Rosoux, René; Libois, Roland ULg

Learning material (1980)

Detailed reference viewed: 7 (2 ULg)
Full Text
See detailDe nouveau une genette en Belgique
Libois, Roland ULg; Questiaux, M.

in Naturalistes Belges (Les) (1980), 61

A genet (Genetta genetta) has been killed in the village of Mahoux (50°10'N 4°55'30"E; 20/11/1975): the fourth time a genet was observed in Belgium.

Detailed reference viewed: 37 (1 ULg)
Full Text
See detailRépartition et milieu naturel du muscardin (Muscardinus avellanarius) en Belgique
Libois, Roland ULg

in Ciconia (1980), 4(1), 43-50

In view of collecting data on the geographical distribution of the common dormouse in Belgium, a questionary was sent to the forest rangers and bird watchers interested in looking after nestboxes. In ... [more ▼]

In view of collecting data on the geographical distribution of the common dormouse in Belgium, a questionary was sent to the forest rangers and bird watchers interested in looking after nestboxes. In addition, a detailed survey of the vegetation was carried out in 76 localities where the common dormouse has recently been recorded. In Belgium, this rodent is known to live in wooded areas characterized by their structure (at least two layers of woody plants) and their species richness. It has never been recorded in monospecific spruce or pine stands: in fact, the common dormouse very scarcely occurs in such regions where spruce stands make up most of the wood cover. [less ▲]

Detailed reference viewed: 36 (3 ULg)
Full Text
Peer Reviewed
See detailLes micromammifères dans le département des Pyrénées Orientales. Essai de répartition altitudinale en liaison avec les étages de végétation
Fons, Roger; Libois, Roland ULg; Saint Girons, Marie Charlotte

in Vie et milieu (1980), 30

In the Pyrénées-Orientales, distribution of small mammals and relative densities of the different species are governed by the lanscape: coastal and brackish water vegetation, agricultural areas in the ... [more ▼]

In the Pyrénées-Orientales, distribution of small mammals and relative densities of the different species are governed by the lanscape: coastal and brackish water vegetation, agricultural areas in the Roussillon plain, mediterranean land vegetation, forests of lower montain and subalpine levels, alpine pastures. Finally topographic plays its role in the linkage of biocenoses and in particular by the orientation of the three main valleys with the resulting distribution of solar impact: mediterranean species attaining relatively high altitudes in warm sites paralleled by mountain species descending fairly low on shady slopes. In the area studied, the subalpine and low mountain levels are characterized by the absence of Crocidurinae, and the presence of Sorex "araneus", Sorex minutus, Microtus arvalis, Arvicola terrestris and Clethrionomys glareolus. The mediterranean level is characterized by the absence of Sorex and the presence of Pitymys duodecimcostatus and Mus spretus. Crocidura russula, C. suaveolens and Suncus etruscus occur in considerable numbers, but their presence is not typical of the mediterranean biome. The submediterranean level (transition zone) is the richest in terms of species number, as it comprises the zone of faunal overlap according to local solar impact. [less ▲]

Detailed reference viewed: 39 (1 ULg)
Full Text
See detailCes animaux que l'on dit nuisibles: blaireau, putois, fouine et les autres...
Libois, Roland ULg

in Natura Mosana (1979), 32(4), 161-164

Detailed reference viewed: 21 (1 ULg)
Full Text
See detailLes mammifères d'une commune rurale du sillon mosan: Landenne
Libois, Roland ULg

in Naturalistes Belges (Les) (1979), 60

Detailed reference viewed: 8 (1 ULg)
Full Text
Peer Reviewed
See detailDiscrimination des crânes du campagnol des champs, Microtus arvalis (Pallas) et du campagnol souterrain, Pitymys subterraneus (de Sélys Longchamps) en l'absence de mandibule
Libois, Roland ULg

in Mammalia (1979), 43(1), 99-112

1799 skulls of common vole and 535 skulls of pine voles from different Belgian populations have been studied in three aspects: i) the pattern of the nasal-frontal and premaxillary-frontal sutures. This ... [more ▼]

1799 skulls of common vole and 535 skulls of pine voles from different Belgian populations have been studied in three aspects: i) the pattern of the nasal-frontal and premaxillary-frontal sutures. This pattern is an excellent criterion by which identify the both species, and it is almost always accurate. ii) the value of ratios between a skull's height and the length of its diastema. This technique enables one to discriminate between common vole specimens with ratios above 95 % and pine vole specimens below 86%. iii) the width of the interorbital constrition. This seems to be an equally good criterion of identification, even for young animals. Hovewer, in Europe, it seems to have a clinal variation, a finding which should be verified. For the Belgium populations studied, the values for the common vole range from 2.60 to 3.50 mm (mean 3.09 mm). In the pine vole they range from 3.30 to 4.00 mm (mean 3.65 mm). [less ▲]

Detailed reference viewed: 22 (1 ULg)
Full Text
Peer Reviewed
See detailObservations sur les siphonaptères parasites du muscardin (Muscardinus avellanarius) en Belgique
Libois, Roland ULg

in Belgian Journal of Zoology (1979), 109(2-4), 77-85

More than 1,600 fleas collected in southern Belgium from 48 Common dormouse (Muscardinus avellanarius) and from 126 nests of the rodent have been examined by the author. Monopsyllus sciurorum to be the ... [more ▼]

More than 1,600 fleas collected in southern Belgium from 48 Common dormouse (Muscardinus avellanarius) and from 126 nests of the rodent have been examined by the author. Monopsyllus sciurorum to be the only regular and abundant flea on this small mammal and in his nest. Other fleas were also found: Ceratophyllus gallinae, Dasypsyllus gallinulae, Megabothis turbidus, M. walkeri, Hystrichopsylla talpae and Ctenophthalmus agyrtes. They must be considered as accidental guests of the rodent. The author shows besides they are great number of bird-fleas in some samples because the dormouse-nests from whose the fleas were taken were built on old tit-nests. Finally, he thinks one cannot conclude that Myoxopsyllus laverani is not a dormouse guest. This species is obviously lacking in the samples but is a very rare flea in Belgium, particularly in Ardennes where the most important part of the examined material was reaped. [less ▲]

Detailed reference viewed: 55 (3 ULg)
Full Text
See detailLes mammifères du versant français des Pyrénées Atlantiques
Saint Girons, Marie Charlotte; Fayard, Armand; Libois, Roland ULg et al

in Bulletin de la Société d'Histoire Naturelle de Toulouse (1978), 114(1-2), 247-260

Dans le massif de l'Ossau, les petits mammifères d'origine méditerranéenne (Crocidura) ne dépassent pas en altitude l'étage collinéen. A l'étage montagnard, le milieu le plus rihe en espèces est constitué ... [more ▼]

Dans le massif de l'Ossau, les petits mammifères d'origine méditerranéenne (Crocidura) ne dépassent pas en altitude l'étage collinéen. A l'étage montagnard, le milieu le plus rihe en espèces est constitué par les pierriers non dépourvus de végétation et entourés par la hêtraie sapinière. Ils abritent des rongeurs rupicoles et ceux qui ne sont pas strictement inféodés aux espaces herbeux découverts. La faune des petits insectivores dépend du degré d'humidité. Les taillis humides, les clairières bien arrosées et parsemées de buissons ainsi que les forêts mixtes à sous bois dense sont occupés par des populations abondantes de rongeurs et d'insectivores. Les pelouses surpâturées et les rhodoraies de l'étage subalpin sont pauvres en espèces. Il en est de même des pierriers à l'étage alpin. Toutefois, les quelques espèces qui y sont représentées peuvent former de petites populations denses et localisées à la faveur de micro millieux favorables. Les milieux les plus pauvres sont la futaie sombre à un seul étage de végétation et la rhodoraie intermédiaire entre la forêt et la pelouse alpine. [less ▲]

Detailed reference viewed: 13 (1 ULg)
Full Text
Peer Reviewed
See detailRépartition des micromammifères dans l'est de la Belgique
Libois, Roland ULg

in Ruwet, J.C. (Ed.) Problèmes liés à l'étude et à la gestion de la faune des Hautes Fagnes et de la Haute Ardenne (1978)

The maps 2 to 17, drawed in UTM coordinates, show the pattern of distribution of several species of small mammals in eastern Belgium. Biogeographic data were colleted by means by barn owl pellets analysis ... [more ▼]

The maps 2 to 17, drawed in UTM coordinates, show the pattern of distribution of several species of small mammals in eastern Belgium. Biogeographic data were colleted by means by barn owl pellets analysis. Many traps also places inside the natural reserve "Les Hautes Fagnes" in order to compare the small mammal fauna of this area with th eastern Belgian fauna. Traps were set in spruce forests, turf moors, bilberry moors which are the most important biotopes in the "Les Hautes Fagnes". In this area, we don't find some man linked species like the rats (Rattus), the house mouse and the white toothed shrews (Crocidura). The common vole, Microtus arvalis, also seems to be lacking in this area. A list of the different small mammals species living in eastern Belgium is given. The species with a mark + are those we've found in the area of "Les Hautes Fagnes" (square KB80 and KB90 in UTM code). [less ▲]

Detailed reference viewed: 24 (5 ULg)
Full Text
See detailNotes sur les puces (Siphonaptera) des micromammifères du plateau des Hautes Fagnes
Libois, Roland ULg

in Naturalistes Belges (Les) (1978), 59

Au cours des années 1974 à 1976, des puces (Siphonaptera) parasites de micromammifères ont été systématiquement récoltées dans la réserve naturelle domaniale des Hautes Fagnes. Cette étude a mis en ... [more ▼]

Au cours des années 1974 à 1976, des puces (Siphonaptera) parasites de micromammifères ont été systématiquement récoltées dans la réserve naturelle domaniale des Hautes Fagnes. Cette étude a mis en évidence la présence de deux nouvelles espèces pour la faune de Belgique: Peromyscopsylla b.bidentata et P. silvatica ainsi que celle de Hystrichopsylla talpae, Rhadinopsylla isacantha continentalis, Palaeopsylla s. soricis, P. minor, Ctenophthalmus agyrtes et Megabothris walkeri. De plus, Ceratophyllus gallinae a été trouvée dans un nichoir. [less ▲]

Detailed reference viewed: 30 (1 ULg)
Full Text
See detailEtude des mammifères et réserves naturelles
Libois, Roland ULg

in Bulletin des Réserves Naturelles et Ornithologiques de Belgique (1977), 25

Detailed reference viewed: 10 (2 ULg)
Full Text
See detailA propos du régime alimentaire de la pie grièche grise (Lanius excubitor)
Libois, Roland ULg

in Aves (1977), 14(2), 147

Detailed reference viewed: 14 (1 ULg)
Full Text
See detailNote sur la repartition des Gliridae en Belgique
Libois, Roland ULg

in Naturalistes Belges (Les) (1977), 58

Three distribution maps are presented.

Detailed reference viewed: 19 (2 ULg)
Full Text
See detailContribution à l'étude du régime alimentaire de la chouette chevêche (Athena noctua) en Belgique
Libois, Roland ULg

in Aves (1977), 14

The recognition of 1,782 preys from 9 little owl's (Athena noctua) pellet samples shows us that: i: the importance of the vertebrates in the owl's diet varies sharp from one season to the other (mean ... [more ▼]

The recognition of 1,782 preys from 9 little owl's (Athena noctua) pellet samples shows us that: i: the importance of the vertebrates in the owl's diet varies sharp from one season to the other (mean value: 11.1 %); ii:voles of the genus Microtus account for 4/5 of the owl's vertebrate preys; iii: the more abundant insects in the owl's diet are weevils (19%), cantharis (19 %), ground beetles (12%), earwigs (11%), beetles and may beetles (17%); iv: the little owl principally hunts by foot as his major prey items live on the ground or at a very low level in the grasses. Moreover, the analysis of 4 stomach contents (127 preys) suggests that the preys without any resistant anatomic feature (such as caterpillars or earthworms) probably disappears and thus let appear no identifiable remain in the pellets, when they easily can be found in the stomachs. [less ▲]

Detailed reference viewed: 57 (1 ULg)
Full Text
Peer Reviewed
See detailPrésence du campagnol des neiges Microtus nivalis Miller 1908, dans les collines du Roussillon
Fons, Roger; Libois, Roland ULg

in Vie et milieu (1977), 27(2), 279-282

Detailed reference viewed: 10 (1 ULg)