CONTENTS XI 



Page 



111. On 602 days the amount of food consumed by a 



captive female sea otter was recorded 296 



112. Daily food consumption of a 39-lb. female sea 



otter (Susie) during a midwinter month 



and a midsummer month 297 



113. Average daily weight of food consumed each month 



in 1957 by an adult female sea otter weighing 



about 39 lb 298 



114. Juvenile otters learned begging behavior within 



a day or two after capture 301 



115. A large and unusually light-colored adult female 



aggressively wrenched a food item from a 



juvenile otter 302 



116. The activities of a captive female sea otter were 



recorded for each minute from before sunrise 



to after sunset on 29 August 1957 306 



117. Behavior of an adult male sea otter during a mean 



or average night 308 



118. Behavior of an adult female sea otter during a mean 



or average night 309 



119. Seasonal behavior of an adult male sea otter at night 110 



120. Seasonal behavior of an adult female sea otter at night 110 



121. A mother otter was placed in the pool without 



receiving a tranquilizer 313 



122. The same female and pup as shown in figure 121 



about 10 minutes after the mother received an 



injection of Sparine tranquilizer 314 



123. Captive otters held on dry bedding habitually 



lay on their back or side 318 



TABLES 



Table 



1. Weight and length of newborn pups taken at 



Amchitka Island, Alaska 20 



2. Total length and body weight of adult sea otters 



killed at Amchitka Island, Alaska 22 



3. Total length and body weight of adult sea otters 



killed in areas of sparse population 23 



4. Total length and body weight of adult sea otters found 



dead on beaches at Amchitka Island, Alaska 23 



5. Weight loss of 10 adult male sea otters that died 



in captivity 23 



6. Weight loss of seven adult female sea otters that 



died in captivity 23 



7. Intestine length of adult sea otters 26 



8. Weights of body organs in nine adult female and 



six adult male sea otters 27 



9. Blood quantity in sea otters 30 



10. Observation of sea otters beyond 3 miles from 



shore in waters off Alaska 68 



