-4- 
west of Green Island. All counts are presented graphically in Figure 1. 
The total number of seals seen, and the number and identity of tagged 
seals, are available for each count on the main island. By tabulating 
% 
a running total of the number of adult group animals tagged prior to 
each census it is possible to calculate the percentage of the tagged 
adult group seen on any one census (Table 2). The mean percentage of 
tagged adult group seen during censuses is 9.2 (SD 6.9) (see Figure 2). 
A chart was constructed to show the months in which each individual was 
observed (Figure 3). From this chart it is possible to determine the 
number of different tagged individuals observed in each month. The mean 
* » 
number of different individuals observed for 22 consecutive months is 
43.4 (SD 21.5). The mean percentage of the total tagged adult group 
observed in 40.4 (SD 19.6). The number of different individuals observed 
during a given month was used instead of the cumulative total of tagged 
seals to calculate an adjusted percentage of tagged seals observed on 
any given census, with the assumption that only those seals seen at some 
time during the month composed the total population of tagged seals for 
that month (Figure 2). The mean adjusted percentage of tagged adult group 
seen per census is 23.5 (SD 18.1). The data were examined for population 
turnover by determining the number of individuals for each month which 
were observed during the previous month and the number new for the month. 
The frequency distribution for the percentage of new animals each month 
is plotted in Figure 4. 
Recent population estimates for four Leeward islands are presented 
in Table 3 with the authority for each census and the date it was made. 
