Table 9. --Reproductive condition of female eeale sampled from 



the kill, by age, St. Paul Island, 26 June to 16 August 1968 



Table 1 1. --Variances in and means of the weights of living 

 seal pups, St. Paul Island, 30 August 1968 



Jtsi 



Reproductive condition 



Nonpost partum | Post partum 



Pregnancy 

 rate 



Number 



3 



35 



115 



136 



102 



67 



67 



52 



49 



34 



26 



30 



32 



31 



16 



18 



12 



6 



2 



1 





 2 



7 



36 

 47 

 56 

 57 

 54 

 50 

 45 

 45 

 37 

 4Z 

 40 

 39 

 24 

 33 

 24 

 Zl 

 10 

 17 

 

 



834 

 295 



Table 10. --Pregnancy rates of female seals from hauling grounds 

 and rookeries, age 8 and older, St. Paul Island 



1/ Pregnancy rates are based on examinations of genital tracts 

 for evidence of parturition during the sunmier the animals were 

 Id lied. 



LIVING PUPS WEIGHED 



Data have been collected annually since 

 1957 on St. Paul Island to determine if the 

 body weight of unmarked pups is related to 

 the size of the kill of males of the year class 

 at age 3. The results have been inconclusive 

 in this respect, but do indicate that handling, 

 and marking by tagging or by ren-ioving parts 

 of flipper, retard the growth of pups. The re- 

 lation of body weight of pups in autumn to the 

 return of the year class at age 3 is discussed 

 in the section on forecasts of the kill of males. 



In 1968 we tested the variances and means 

 (table 11) of the weights of unmarked pups from 

 four rookeries. The variances for rookeries 

 and sexes were common (P=0.41), and the 

 frequency of weights appeared to be normally 

 distributed. According to an analysis of var- 

 iance test of rookeries and sexes, the rookery- 



Males 

 Morjovi 

 Reef 

 Polovina 

 Zapadni Reef 

 All rookeries 



Females 

 Reef 



Zapadni Reef 

 Polovina 

 Morjovi 

 All rookeries 



Number 



100 

 100 

 100 



100 

 400 



100 



100 

 100 

 100 



400 



Kli 



sex interaction term was significant (P<0,05). 

 The probable cause of this interaction was that 

 on Morjovi Rookery males had the largest 

 and females the smallest mean weight among 

 the four rookeries. Although conclusions re- 

 garding rookeries and sexes are questionable 

 because of the rookery-sex interaction, dif- 

 ferences between rookeries are negligible 

 when compared with differences between sexes 

 (table 12). 



Male pups averaged 9.6 kg. and females 8,3 

 kg. in 1968. These weights were within 0.1 kg. 

 of the average weights for 1957-68 (table A -23). 



We compared pup weight data obtained in 

 1968 by us on St. Paul Island and by Soviet 

 scientists on Robben and Bering Islands. 

 Weighing dates on Robben and St. Paul Islands 

 were comparable, but the dates on Bering 

 Island were later than for St. Paul Island 

 (table 13). Untagged males on Robben Island 



Table 12. --Analysis of variance in the weights of living 

 seal pups, St. Paul Island, 30 August 1968 



1/ P<0. 05. 



12 



