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Summer d ai ly activity and movement patterns end habttut selectivity by Peary caribou (Ranqiier taranclus pcc/[yi) anel m us k ox cn (Ovibos moschalus) were studiecl at two s ites in Cenadas High Arche. Caribou sh cw ed a qr e ater mobihty and broaeler selectton of h abf tat than muskoxen. Muskoxen red more th an thcy rested in contrast to the qr e ate r amount of time sperrt resling th an feeding by carib ou, The sedqc-producinq hydric-meaclow vegetation type was highly selecled for by muskoxen at both s tudy are as: carib ou s e lected against th e h y dri c-mc adcw type an d preferred th e polar clesert end mes ic-meedow types. Caribou displayed a greater variety in plant species s e lec tion than muskoxen, favouring willow (Soli arcticcn, grasses, forbs, and the flowers of vesculer plants. Muskoxen fed extensivelyon sedges in the hvdrtc-meadow. It is suggested the abunclance end distribution of sedqe-prcducmq me adcws me y control the regional abundance and d is tr ibution of muskoxen. Winter climate is probably the u ltimate factor controlling densities of muskoxen anel canbou in the High Aretic. Zusammenfassung: Sommerliche Tagesaktivitt, und Habitat-Prferenzen des Peary-Karibus (Rangifer tarandus pewyi) und Moschusochsen (OviIJos moschatus) wurden an zwei Stellen in der kanadischen Hocharktis untersucht. Die Karibus zeigten dabei eine grere Mobilitt und breiter nefcherte Habitat-Wahl als die Moschusochsen. Im Gegensatz zu den Karibus verbrachten die Moschusochsen mehr Zeit mit der Nahrunqssuche als mit Ausruhen. Die an Seggen reichen
Parker et al. (Thu,) studied this question.