Fiscal year*1 Number of groups Source Population*2 size Source Survival rate*3 (excluding infant) Source Crude birth rate*4 Source Infant survival rate*5 Source Mature female rate*6 Source Birth rate*7 Source Growth rate*8 Source SSR*9 Source Other factors Source
Before warld war  (4-5) [9] (200-300) [9] No data - No data - No data - No data - No data - No data - No data -    
1962 1 [12] (60-70) [12]    
1966 2 [13] (64-70) [13]    
1969 2 [9] (90-100) [9]    
1980 3 [14] (71) [9], [14]    
1982 4 [9] 250 [9] 0.700 [9] 0.260 [9] 0.460 [9] 0.323 [9]    
1983 5 270 1.036 [9] 0.152 [9] 0.289 0.278 0.510 0.147 Shortage of food resource / extreme weather [9]
1984 5 230 0.844 0.019 0.400 0.204 0.110 0.043    
1985 5 200 0.717 0.222 0.686 0.300 0.850 0.583    
1986 5 211 1.010+ 0.065+ 0.692+ 0.290+ 0.224+ 0.155+    
1987 5 222 0.991+ 0.081+ 0.765+ 0.284+ 0.283+ 0.217+    
1988 5 237 1.005 0.095 0.667 0.308 0.290 0.192    
1989 5 252 0.916 0.198 0.745 0.321 0.580 0.432    
1990 5 263 1.008 0.040 0.900 0.304 0.130 0.113    
1991 5 265 0.905 0.118 0.871 No data - No data - No data -    
1992 6 268 0.977 0.079 0.429 0.317 [9] 0.250 [9] 0.106 [9]    
1993 6 272 0.981 0.049 0.692 0.335 0.140 0.099    
1994 6 294 0.842 0.279 0.855 0.333 0.780 0.663    
1995 6 285 0.949 0.031 0.667 0.298 [18] 0.110 [18] 0.071 [18] 0.79 [19]    
1996 6 275 0.860 0.189 0.556 0.313 0.630 0.349 No data - Shortage of food resource / extreme weather [19]
1997 6 248 0.884 0.022 0.833 0.302 0.080 0.067    
1998 6 259 0.964 0.177 0.455 0.305 0.560 0.253    
1999 6 239 0.903 0.131 0.147 0.335 0.430 0.063 0.94 [16]    
2000 6 241 0.975 0.046 0.727 0.324 0.140 0.103 1.06    
2001 6 249 0.905 0.212 0.608 No data - No data - No data - 1.03    
2002 6 235 0.912 0.060 0.533 0.305 [9], [16] 0.197 [9], [16] 0.105 [9], [16] 0.99 [17]    
2003 6 217 0.860 0.128 0.500 0.289 0.441 0.221 1.04    
2004 6 [15] 221 [15] 0.912 [9], [15] 0.171 [9], [15] 0.622 [9], [15] 0.300 0.580 0.359 1.06    
*1 Fiscal year ending March.
*2 The number of individuals have been counted just before birth season of the year (i.e. after March) since 1982. The estimated population size are in parentheses.
*3  Population size in the fiscal year / population size in the previous fiscal year
*4 Number of birth / population size just before birth season (i.e. population size in the previous fiscal year)
*5 The number of infant surviving over the fiscal year / the number of birth
*6 The number of mature female just before birth season (i.e. the number of mature female in the previous fiscal year) / population size just before birth season (i.e. population size in the previous fiscal year)  
*7 The number of birth / the number of mature female just before birth season (i.e. the number of mature female in the previous fiscal year)
*8 The number of infant surviving over the fiscal year / the number of mature female just before birth season (i.e. the number of mature female in the previous fiscal year)
*9 The number of mature male in the previous fiscal year / the number of mature female in the previous fiscal year
Source: Data includes original variables in these source and calculated variables using these source.
[9] Izawa K. (2009) Studies of wild Japanese macaques. Dobutsusha, Tokyo (in Japanese)
[12] Izawa K. (1963) Japanese macaques in Kinkazan. Yaen 14: 5-11 (in Japanese)
[13] Azuma S., Hayashi K. & Kawai M. (1967) Mammal survey in Kinkazan Island, Miyagi Prefecture in 1966. Ann. Rep. JIBP-CT(5): 197-203 (in Japanese)
[14] Yhoshihiro S. (1980) Japanese macaques in Kinkazan Island. Monkey 24 (5): 14-15 (in Japanese)
[15] Izawa K. (2005a) Results of the census on Kinkazan population of Japanese macaques in 2004. Japanese monkeys in Miyagi Prefecture 20: 21-26 (in Japanese)
[16] Izawa K. (2004) Number of non-troop male and spatial relation of Japanese monkeys in Kinkazan Island. Japanese monkeys in Miyagi Prefecture 16: 35-43 (in Japanese)
[17] Izawa K. (2005b) Variation in ratio of non-troop male to troop male with the seasons in Japanese monkeys living in Kinkazan Island. Japanese monkeys in Miyagi Prefecture 20: 12-16 (in Japanese)
[18] Izawa K. (2000) The ecological study of wild Japanese monkeys living in Kinkazan Island, Miyagi Prefecture: on the population change 1995-2000. Bull. Miyagi Univ. Educ. 35: 329-337 (in Japanese)
[19] Izawa K. (1997) Population census of Japanese macaques at Kinkazan in 1996. Japanese monkeys in Miyagi Prefecture 2: 1-12 (in Japanese)