Abstract
10% to 15% annually (Marnell et al. 1978). The major form of recreational activity on the ONSR is canoe float trips. Estimated use increased from 40,000 canoe floater days in 1968 to 243,000 in 1977; over 500,000 canoe floater days are projected for 1985 (Marnell et al. 1978). The objective of this study was to determine the behavior of green-backed herons in relation to the level of recreationist activity on the ONSR.
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