. The Canadian field-naturalist. 1976 Notes 63 since their release in 1963 until winter 1969, red squirrels populated an area with a radius of about 19 km from Main Brook and Roddickton, or about 1743 km^ (Figure 2). Figure 2. Calculated red squirrel distribution surround- ing the red squirrel release sites of Main Brook and Roddickton on insular Newfoundland's North- ern Peninsula. Dispersal Notre Dame Bay freezes over almost every winter. Red squirrels in Alaska and the Northwest Territories normally do not move about much in winter (Pruitt and Lucier 1958; Zirul and Fuller 1970). Those in N
. The Canadian field-naturalist. 1976 Notes 63 since their release in 1963 until winter 1969, red squirrels populated an area with a radius of about 19 km from Main Brook and Roddickton, or about 1743 km^ (Figure 2). Figure 2. Calculated red squirrel distribution surround- ing the red squirrel release sites of Main Brook and Roddickton on insular Newfoundland's North- ern Peninsula. Dispersal Notre Dame Bay freezes over almost every winter. Red squirrels in Alaska and the Northwest Territories normally do not move about much in winter (Pruitt and Lucier 1958; Zirul and Fuller 1970). Those in Newfoundland probably do not either, although winters are more mUd. Dispersal of young does not occur then, and tree squirrels are reluctant to cross open expanses (Mosby 1969). The two islands nearest Camel Island, Tinker 1300m west and the unnamed island 660 m northeast, had no red squirrels. Knights Island, 500 m north of the unnamed island, also had no squirrels, although the distance between Camel and Knights islands is divided by four smaller islands (Figure 1) which could have aided colonization. Thus, Knights Island appears to be the most easily reached island, yet no squirrels occurred there in 1971. Natural dispersal probably did not occur across water. In October 1968, snowshoe hares (Lepus americanus) were abundant on Camel Island, and residents of the Newfound- land mainland had snares set. These snares catch the occasional red squirrel by the body as the squirrel runs along the rabbit lead. Squirrels probably were inadvertently snared on Camel Island, and, surviving the snare, were brought back to Comfort Cove by residents, and also released on Sivier and Birchy islands. Comfort Cove is the closest community to Camel Island, and the only community in Notre Dame Bay reporting red squirrels. Sivier and Birchy islands are favorite resting places for fishermen, some of whom main- tain cabins there. Red squirrels crossed the 200 m from Birchy Island to Passage Island, b
Size: 1444px × 1730px
Photo credit: © Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthorottawafieldnaturalistsclub, bookcentury1900, bookcolle
