. The Canadian field-naturalist. 220 The Canadian FiELD-NATUJiALiST Vol. 114 Table 2. Body parts of 110 male and 67 female tagged Sockeye Salmon scavenged by Brown Bears on Hansen Creek, Alaska (1997 and 1998 data combined). Categories are not mutually exclusive (, both brain and hump could be eaten) and multiple scavenging events on different days (, brain on one day, missing two days later) are counted. Percentages refer to the proportion of all scavenging events by bears in which those body parts were eaten. Bite refers to a wound with no tissue consumed. Body part consumed %of male
. The Canadian field-naturalist. 220 The Canadian FiELD-NATUJiALiST Vol. 114 Table 2. Body parts of 110 male and 67 female tagged Sockeye Salmon scavenged by Brown Bears on Hansen Creek, Alaska (1997 and 1998 data combined). Categories are not mutually exclusive (, both brain and hump could be eaten) and multiple scavenging events on different days (, brain on one day, missing two days later) are counted. Percentages refer to the proportion of all scavenging events by bears in which those body parts were eaten. Bite refers to a wound with no tissue consumed. Body part consumed %of male salmon %of female salmon bite brain hump belly body missing 0 number of scavenging events 132 75 (mean = d). Repeated observations of carcasses suggested they were not only scavenged on the day after they were tagged (, 1-2 days after they died) but some were scavenged several days later. About half (51%) of the carcasses were untouched by either gulls or bears after one day but almost all (93%) were eventually subjected to some form of scavenging (Table 1; Figure 1). Most carcasses were eventually scavenged by bears (77% of males and 67% of females) and the rate of gull scavenging appeared to decline more rapidly than that of bears. However, in many cases a carcass that had been bear scavenged (, removed or body eaten) could not be subse- quently classified as gull scavenged. In 80 cases the first evidence of bear scavenging was the carcass's disappearance from the stream while in 80 cases the carcass was scavenged in place. Most carcasses were so heavily consumed, when first classified as scavenged, that we discarded them and retrieved the tags, but 24 bear-scavenged car- casses were left in the stream for further observa- tions. Subsequent (secondary) scavenging by bears was indicated in 23 cases. Nine carcasses were miss- ing, 6 were largely consumed and we retrieved the tags, and 8 were left on site. Of the la
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