. The Canadian field-naturalist. 1996 Pollard, Ballard, Noel, and Cronin: Summer Distribution of Caribou 669. Figure 5 c. See caption on facing page. The majority of these were in the western portion of the study area (Figure 5a). Most of the larger groups were along the Kuparuk River. Many moderately sized groups were observed in the drainages of the Kuparuk, Putuligayuk, and Sagavanirktok rivers and in the PBOF (Figure 5a). We observed only 75 Caribou on the 6 July survey. Most of these animals were in small groups widely dispersed in the central portion of the PBOF (Figure 5a). Few mosquito
. The Canadian field-naturalist. 1996 Pollard, Ballard, Noel, and Cronin: Summer Distribution of Caribou 669. Figure 5 c. See caption on facing page. The majority of these were in the western portion of the study area (Figure 5a). Most of the larger groups were along the Kuparuk River. Many moderately sized groups were observed in the drainages of the Kuparuk, Putuligayuk, and Sagavanirktok rivers and in the PBOF (Figure 5a). We observed only 75 Caribou on the 6 July survey. Most of these animals were in small groups widely dispersed in the central portion of the PBOF (Figure 5a). Few mosquitoes were active on either 1 July or 6 July (Pollard et al. 1996). On 10 July, insect activity was high, and 3088 Caribou were observed. The majority of Caribou were in four large groups, three of which were in or adjacent to the Kuparuk River (Figure 5b). The fourth large group was located on the coast in the northwest portion of the study area. There were a few small groups in the PBOF. On 17 July, 1163 Caribou were observed (Table 1). The majority were scattered across the northern half of the study area, primarily in the northwest por- tion. Most Caribou occurred in small groups, several of which were observed on gravel pads and roads in the PBOF. The two largest groups (140 and 300 ani- mals) were moving northeast through the PBOF. Observations of Caribou behavior and quantitative measures of insect abundance suggested that oestrid flies were moderately active and mosquito activity was low (Pollard et al. 1996). The number of Caribou {n =3797) observed on 19 July had more than tripled since 17 July, probably as a result of an influx of Caribou from the Kuparuk oil field to the west, as insect activity increased over those two days. As on 17 July, the majority of Caribou were located in the northwest section of the study area (Figure 5c). Sixty-two percent of the ani- mals were in four large groups that were moving north along the Kuparuk River. Other groups of 10-1000 were s
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