. Bulletin of the British Ornithologists' Club. Birds. P. G. Lee & N. Kang 110 Bull. 1994 114(2). Body mass (g) r 18 " 16 - 14 12 10 - 2 u 0 0 ' I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I 0 5 10 15 20 25 30 35 40 Adult Age (days) Figure 2. Increase in body mass of first (O) and second (A) nestlings and wing length (â¢) of White-nest Swiftlet. Adult body mass (â ) and wing length (â¡) are shown. Mean and (vertical line) are given. Data derived from 48 nestlings. Day 0 for both first and second nestlings is taken as the day on w
. Bulletin of the British Ornithologists' Club. Birds. P. G. Lee & N. Kang 110 Bull. 1994 114(2). Body mass (g) r 18 " 16 - 14 12 10 - 2 u 0 0 ' I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I 0 5 10 15 20 25 30 35 40 Adult Age (days) Figure 2. Increase in body mass of first (O) and second (A) nestlings and wing length (â¢) of White-nest Swiftlet. Adult body mass (â ) and wing length (â¡) are shown. Mean and (vertical line) are given. Data derived from 48 nestlings. Day 0 for both first and second nestlings is taken as the day on which each nestling hatched. TABLE 2 Comparison of nestling growth parameters of Black- and White-nest Swiftlets. K = growth rate; A = asymptotic body mass; t10_90 = time taken for growth from 10 to 90% A; N = the number of nestlings from which data were obtained White-nest Swiftlet K (per day) A(g) Days to reach A T10-90 (days) N 1st 2nd nest Swiftlet nestling nestling 29 28 31 25 20 21 58 28 20 DISCUSSION In tropical species of birds of less than 100 g the value of K typically ranges from to (Ricklefs 1976). Thus, by comparison, the. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original British Ornithologists' Club. London : The Club
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