P.W. 1994. Influence of season, sex, and site availability on fisher (Martes pennanti) rest-site selection in the central hardwood forest. Can. J. 2001. 72: 1416-1419.We monitored 20 adult fishers (8 males, 12 females) to investigate the effects of season, sex, and site availability on rest-site selection by fishers at the southern extent of their range. Data on rest-site locations (n = 219) and random sites (n = 194) were collected from December 1989 through February 1991. Fishers rested in hardwood, softwood, and mixedwood forest types in proportion to their availability in summer; however, hardwoods were used less than expected in winter. Fishers used nests, cavities, and burrows in proportion to their availability in winter. In summer, however, nests were selected twice as often as expected, cavities were used less than expected, and burrows were not used. Male fishers tended to use larger cavity trees and mixed forest stands more often than females did. In winter, fishers were not restricted to coniferous forest types, as occurs at the northern extent of their range, because moderate snow depths did not restrict movement and prey may have been more available in other forest types. Fishers appeared to select rest-site types most suitable for thermoregulation and obtaining prey. Trees with diameter at breast height 2 3 2 cm may provide cavities for rest sites in hardwood-dominated forests.KILPATRICK. H.J., ht REGO, P.W. 1994. Intluence of season, sex, and site availability on fisher (Martes pennanti) rest-site selection in the central hardwood forest. Can. J. 2001. 72 : 1416-1419. Nous avons suivi 20 animaux adultes (8 miiles, 12 femelles pour kvaluer les effets de la saison, du sexe et de la disponibilitk des sites sur le choix de sites de repos chez la Martre d'Amkrique, dans le sud de sa rkpartition. Des donnkes aux sites de repos (n = 21 9) et a des sites choisis au hasard (n = 194) ont 6tk accumulkes de dkcembre 1989 a fkvrier 1991. Les martres se reposaient dans les forets de bois durs, les fortts de bois mous et les forets mixtes selon leur disponibilitk au cours de I'ktk, mais les fortts de bois durs ktaient utiliskes moins que prkvu en hiver. Les martres utilisaient des nids, des cavitks et des terriers selon leur disponibilitk en hiver. Cependant, en ktk les nids ktaient utilisks deux fois plus souvent que prkvu, les cavitks, moins souvent que prkvu et les martres ne se reposaient pas dans des terriers. Les martres miiles avaient tendance a utiliser les arbres a grandes cavitks et les fortts mixtes plus que les femelles. En hiver, les martres n'ktaient pas confides aux divers types de fortts de coniferes, comme dans la partie nord de leur rkpartition, car la couche de neige d'kpaisseur moyenne n'entravait pas leurs deplacements et il se peut que les proies aient 6tk plus nombreuses dans les autres types de fortts. Les martres semblaient choisir des types de sites de repos plus proprices a la thermorkgulation et pour se procurer des proies. Les arbres de diametres a hauteur de poitrine 2 3 2 cm compor...