262 



NORTH AMERICAN FAUNA 68 



Table 57. — Abnormal conditions found in sea otters that died on beaches of 

 Amchitka Island, Alaska 



Collection 



number 



Age 



Sex 



Date 



Condition 



59-68 



juv. 



cT 



15 Mar. 1959 



Fractured skull. 



59-92 



ad. 



7 



29 Mar. 1959 



Bruised head. 



36-56 



juv. 





31 May 1956 



Bruises, blood clots around head 









and neck. 



B20-57 



juv. (pup) 





30 Oct. 1957 



Broken neck. 



59-3 



juv. 



9 



26 Jan. 1959 



Nondraining abscess dorsally in 

 neck and head. 



47-56 



juv. 



? 



17 June 1956 



2 broken ribs. 



59-73 



juv. 



? 



14 Mar. 1959 



Extensive body bruises and 

 swellings. 



59-49 



ad. 



cf 



5 Mar. 1959 



Body bruises perforated 

 intestine. 



59-100 



ad. 





31 Mar. 1959 



Internal hemorrhage — quantity 

 of blood in abdominal cavity. 



59-155 



juv. 



9 



6 May 1959 



Perforated intestine and intus- 

 susception of small intestine. 



44-56 



ad. 



d" 



11 June 1956 



Bruises in genital area. 



59-34 



ad. 



d" 



20 Feb. 1959 



Bruised penis. 



62-241 



ad. 



d" 



12 Mar. 1962 



Penis swollen and extruded. 



59-130 



ad. 



9 



17 Apr. 1959 



Uterine cyst 180 X 50 mm. 



D7-57 



ad. 



? 



6 Dec. 1957 



Abscess in jaw, liver discolored 

 and with abnormal adhesions .i 



59-85 



ad. 



? 



25 Mar. 1959 



Liver with abnormal adhesions 

 and discoloration.! 



59-79 



juv. 



? 



21 Mar. 1959 



Hemorrhagic nasal passages. 



59-90 



ad. 



cT 



29 Mar. 1959 



Cutaneous emphysema. 



59-82 



juv. (pup) 



9 



25 Mar. 1959 



Lungs black, pneumonia? 



B12-57 



s.ad. ? 



9 



22 Oct. 1957 



Malignant neoplasm of the 

 intestine.! 



59-48 



ad. 



9 



4 Mar. 1959 



Congenital cystic kidney and 

 edema.! 



1 See section on Parasites and Miscellaneous Diseases for j 



I more detailed analysis. 



Table 58. — Summary of observations from 83 sea otters found dead at 

 Amchitka Island, Alaska, 1959 



Observation 





Number of 

 juveniles 



Number of 

 adults 



Total animals examined 





48 



35 



Skeletal remains only found i 





18 



14 



Field necropsy performed.—. - 





- 27 



18 



Dental malocclusion indicated 2 





24 



14 



Bone damage to jaw 3. 





0 



13 



Tooth damage ( dental attrition ) : * 









None to moderate 





44 



6 



Moderate to severe 





0 



29 



Lesions: ^ 









Hemorrhagic enteritis present 





23 



11 



Stomach parasite ( T. decipiens ) present 





2 



6 



Possible physical injury indicated 





12 



9 



Food in stomach « 





. - 0 



0 



! Skulls only examined. 



2 In juveniles, malocclusion occurs while the permanent teeth are growing, particularly when 

 deciduous teeth are pushed out of line. In old adults, postcanine teeth may be worn to the gum- 

 line or to the bone. 



^ When teeth of old animals are severely worn, infection of the bone and osteolysis may occur. 

 * See Dental Attrition. ■ 

 ^ See Parasites and Miscellaneous Diseases. 



^ All carcasses showed signs of emaciation. Body weights (particularly for adults) were ab- 

 normally low (see Body Measurements) . 



