THE SEA OTTER IN THE EASTERN PACIFIC OCEAN 23 



Table 3. — Total length and body weight of adult sea otters killed in areas 



of sparse population 



[These otters were 



shot in 1960 in the Shumagin Islands 



(6), off Unimak 



Island (2), and 





Adak Island ( 1 ) ] 









Item 



Males 



Females 



Number 





5 



4 



Maximum weight 



kilograms 



44.9 



32.7 



Minimum weight 





34.0 



19.9 



Mean weight 



- do 



39.5 



25.2 



Standard deviation 





10.12 



13.0 



Maximum length 



- centimeters 



143 



139 



Minimum length 



do 



140 



125 



Mean length ._ 



-- do 



140.8 



129.8 



Standard deviation 





0.5 



6.3 



Table 4. — Total length and body weight of adult sea otters found dead on 

 beaches at Amchitka Island, Alaska 



[Weights and measurements could be obtained from relatively few of the total found. All are 

 combined in this table: 1956 (1), 1959 (7), 1962 (20), and 1963 (2)] 



Item Males Females 



Number ... 







13 





17 



Maximum weight 





—kilograms 



31.7 





18.6 



Minimum weight 





...do 



15.9 





12.2 



Mean weight — 





do 



21.4 





16.2 



Standard deviation 







10.20 





3.83 



Maximum length .. 





centimeters 



145 





137 



Minimum length 





do 



130 





122 



Mean length 





...do 



136.5 





131.7 



Standard deviation .- 







4.39 





3.74 



Table 5. — Weight loss of 10 adult male sea 



otters that died in captivity 





[Weight in kilograms] 







Collection 



Weight at 



Weight at 



Weight 



Percent 



Days in 



number 



capture 



death 



loss 



loss 



captivity 



11-56 .. 



33.6 



25.4 



8.2 



24 



15 



III-56 



32.7 



22.5 



10.2 



31 



18 



VI-56 



33.6 



24.0 



9.6 



28 



15 



VIII-56 



26.3 



19.5 



6.8 



26 



8 



IX-56. 



25.8 



18.1 



7.7 



30 



47 



D-8-57. . ... 



20.4 



17.9 



2.5 



12 



7 



D-20-57 



30.4 



26.3 



4.1 



13 



20 



D-21-57 



29.5 



26.8 



2.7 



9 



13 



D-22-57 



31.7 



20.9 



10.8 



31 



17 



D-15-57 



28.6 



20.9 



7.7 



27 



305 



Mean 



29.25 



22.23 



7.03 



24 





Table 6. — Weight loss of seven adult female sea otters that died in captivity 



[Weight in kilograms] 



Collection 

 number 



Weight at 

 capture 



Weight at 

 death 



Weight 

 loss 



Percent 

 loss 



Days in 

 captivity 



1-56 ... 



21.3 



19.3 



2.0 



9 



6 



IV-56 



23.1 



15.0 



8.1 



35 



57 



VII-56 



24.0 



17.0 



7.0 



29 



15 



D-7-57 



25.4 



21.3 



4.1 



16 



6 



D-16-57 



27.2 



23.4 



3.8 



14 



27 



D-17-57 



22.2 



19.7 



2.5 



11 



25 



D-23-57.. . .... .. . . 



22.5 



18.5 



2.3 



10 



10 



Mean... 



23.67 



19.17 



4.50 



19 





