. Bulletin. Natural history; Natuurlijke historie. 8 PEABODY MUSEUM BULLETIN 24 cerned, a much larger number of suitable breeding sites than are actually oc- cupied. It is thus highly probable that the populations of the various species are ultimately limited by the availability of food (Ashmole 1963a), although cer- tain species may have recently been adversely affected by man's activities. Christmas Island and its Sea Bird Populations Christmas Island, the largest member of the Line Island group in the central Pacific, lies about 1,200 miles south of Hawaii at 02° N., 157° W. (Fig. 2). The
. Bulletin. Natural history; Natuurlijke historie. 8 PEABODY MUSEUM BULLETIN 24 cerned, a much larger number of suitable breeding sites than are actually oc- cupied. It is thus highly probable that the populations of the various species are ultimately limited by the availability of food (Ashmole 1963a), although cer- tain species may have recently been adversely affected by man's activities. Christmas Island and its Sea Bird Populations Christmas Island, the largest member of the Line Island group in the central Pacific, lies about 1,200 miles south of Hawaii at 02° N., 157° W. (Fig. 2). The 170° W 160° W I 150° W 140° W I 20° Nf 10° Nf â NORTH EQUATORIAL CURRENT <- EQUATORIAL COUNTERCURRENT. TRADES "f20°N PREDOMINATE -t10°N 0°f WASHINGTON. V FANNING. <*â â SOUTH EQUATORIAL CURRENT ... CHRISTMAS*!. * fc K * *. \ \ \ EQUATORIAL U P W E L I I N G -40° 10° Sf ⢠⢠⢠PHOENIX ISLANDS + 170° W + 160° W <- TRADES PREDOMINATE + 140° W -il0°S figure 2. Major features of the Central Equatorial Pacific Ocean. closest other island is Fanning Island, about 165 miles to the northwest, while to the southwest Jarvis Island is about 220 miles away. The Line Islands as a group are one of the most distant from continental land, North America being over 3,000 miles to the northeast. Christmas Island is a coral atoll with a total length of 32 miles and a breadth of 15 miles at its western end. The eastern part of the island is solid land with various landlocked lagoons, the central part is a maze of small islets and la- goons, while at the western end is an enormous shallow lagoon which has two connections with the sea. This lagoon contains a number of islets, of which three have large colonies of sea birds, and birds also nest in several parts of the main island. The total land area of Christmas Island is about 330 square miles, while the main lagoon has an area of 142 square miles. The maximum depth
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Keywords: ., bookcentury1900, bookcollectionbiodiv, booksubjectnaturalhistory
