Wrestling Play in Adult River Otters, Lutra canadensis

1991 ◽  
Vol 72 (2) ◽  
pp. 386-390 ◽  
Author(s):  
A. L. Beckel
Keyword(s):  
River Otters ◽  
Lutra Canadensis

Predation by River Otters (Lutra canadensis) on Juvenile Coho Salmon (Oncorhynchus kisutch) and Dolly Varden (Salvelinus malma) in Southeast Alaska

1993 ◽  
Vol 50 (2) ◽  
pp. 312-315 ◽  
Author(s):  
C. Andrew Dolloff
Keyword(s):  
Coho Salmon ◽  
Oncorhynchus Kisutch ◽  
River System ◽  
Dolly Varden ◽  
Salvelinus Malma ◽  
Southeast Alaska ◽  
River Otters ◽  
Juvenile Salmonids ◽  
Dolly Varden Salvelinus Malma ◽  
Lutra Canadensis

The effect of predation by river otters (Lutra canadensis) on juvenile coho salmon (Oncorhynchus kisutch) and Dolly Varden (Salvelinus malma) in a Southeast Alaska watershed was inferred by examining the number and size distribution of sagittal otoliths that were found in otter scats. Individual scats contained up to 408 otoliths, indicating that at least 200 fish had been eaten between defecations. Otoliths from juvenile salmonids outnumbered those from coastrange sculpins (Cottus aleuticus) by about six to one. Based on examination of over 8000 otoliths found in otter scats, at least 3300 juvenile salmonids were eaten by two river otters and their two young in the Kadashan River system during a 6-wk period in late spring 1985.

Mercury Levels in Michigan River Otters,Lutra canadensis

1993 ◽  
Vol 8 (2) ◽  
pp. 141-147 ◽  
Author(s):  
Ramona M. Ropek ◽  
Robert K. Neely
Keyword(s):  
River Otters ◽  
Lutra Canadensis

Butyltin Compounds in River Otters (Lutra canadensis) from the Northwestern United States

1999 ◽  
Vol 36 (4) ◽  
pp. 462-468 ◽  
Author(s):  
K. Kannan ◽  
R. A. Grove ◽  
K. Senthilkumar ◽  
C. J. Henny ◽  
J. P. Giesy
Keyword(s):  
United States ◽  
River Otters ◽  
Lutra Canadensis ◽  
Butyltin Compounds

Food habits of the river otter Lutra canadensis in the marine environment of British Columbia

1984 ◽  
Vol 62 (1) ◽  
pp. 88-91 ◽  
Author(s):  
G. B. Stenson ◽  
G. A. Badgero ◽  
H. D. Fisher
Keyword(s):  
British Columbia ◽  
Marine Environment ◽  
Food Habits ◽  
River Otter ◽  
River Otters ◽  
Two Samples ◽  
Lutra Canadensis ◽  
Fish Remains ◽  
Coastal British Columbia

Food habits of river otters (Lutra canadensis) inhabiting coastal British Columbia were studied by examining scat and stomach samples. Fish remains occurred in 99.4% of the scats while crustacean and bird remains were encountered in 7.2 and 4.2%, respectively. The majority of fish identified belong to six groups: Embiotocidae (occurring in 42.2% of the scats), Cottidae (40.5%), Pleuronectiformes (40.0%), Blennioidea (33.3%), Scorpaenidae (30.1%), and Hexagrammidae (13.1%). Of 69 stomachs collected by trappers, 86.9% contained remains of fish and 13% contained bird remains. Only two samples (2.9%) contained crustacean remains. Similar families of fish were found in both scat and stomach samples. Scat samples, collected on 10 consecutive visits to 55 sites from May 1977 through February 1978, indicated that, with the possible exception of bird remains, food types do not appear to vary seasonally. Otters in the marine environment utilize their habitat in the same manner that freshwater otters do; they are opportunistic feeders and rely primarily on midsize, slower moving fish that occur in the intertidal and subtidal regions close to shore.

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