Experiments on sprainting activity of otters ( Lutra lutra ) in the Bieszczady Mountains, southeastern Poland / Observations des épreintes de la loutre ( Lutra lutra ) sur les montagnes du Bieszczady au sud-est de la Pologne

Mammalia ◽  
2006 ◽  
Vol 70 (1-2) ◽  
Author(s):  
Marcin Brzeziński ◽  
Jerzy Romanowski

AbstractConsecutive surveys of otter spraints of both banks along a 28-km stretch of the River San showed an average of 4.18 deposited spraints/km per day during a 3-week pre-experimental period. The variation in spraint density on particular 1-km-long sections of the river was high and varied from 40 to 145 spraints/km after 3 weeks. Spraint deposition was positively correlated with the proportion of steep and rocky riverbanks, which were characterised by a higher number of potential sprainting sites than those with many flat and undermined banks. Average daily deposition of spraints on the whole 28-km stretch after experimental removal of spraints (experimental period) did not significantly differ compared to the pre-experimental period. However, in sections where otter spraints were removed (n=14), sprainting intensity increased 1.6-fold, while in the control sections (n=14) the defecation ratio decreased 1.5-fold during the first week after removal. Placement of additional spraints of unfamiliar individuals on half the experimental sections did not stimulate otters to increase defecation on these sections compared to those where only old spraints were removed. Otter response to the removal of spraints has a spatial character and is expressed by differentiation in spraint deposition within the home range.

Mammalia ◽  
2006 ◽  
Vol 70 (1-2) ◽  
Author(s):  
Marcin Brzeziński ◽  
Jerzy Romanowski

AbstractConsecutive surveys of otter spraints of both banks along a 28-km stretch of the River San showed an average of 4.18 deposited spraints/km per day during a 3-week pre-experimental period. The variation in spraint density on particular 1-km-long sections of the river was high and varied from 40 to 145 spraints/km after 3 weeks. Spraint deposition was positively correlated with the proportion of steep and rocky riverbanks, which were characterised by a higher number of potential sprainting sites than those with many flat and undermined banks. Average daily deposition of spraints on the whole 28-km stretch after experimental removal of spraints (experimental period) did not significantly differ compared to the pre-experimental period. However, in sections where otter spraints were removed (n=14), sprainting intensity increased 1.6-fold, while in the control sections (n=14) the defecation ratio decreased 1.5-fold during the first week after removal. Placement of additional spraints of unfamiliar individuals on half the experimental sections did not stimulate otters to increase defecation on these sections compared to those where only old spraints were removed. Otter response to the removal of spraints has a spatial character and is expressed by differentiation in spraint deposition within the home range.


1995 ◽  
Vol 5 (2) ◽  
pp. 87-96 ◽  
Author(s):  
Kevin Roche ◽  
Rebecca Harris ◽  
Stuart Warrington ◽  
Gordon H. Copp
Keyword(s):  

Oikos ◽  
1967 ◽  
Vol 18 (2) ◽  
pp. 186 ◽  
Author(s):  
Sam Erlinge

2014 ◽  
Vol 47 (Special) ◽  
pp. 66-73 ◽  
Author(s):  
Hyungsoo Seo ◽  
◽  
Youngseob Shin ◽  
Kyungeun Lee ◽  
Yoonmi Kim ◽  
...  

2019 ◽  
Author(s):  
M Rinke ◽  
A Beineke ◽  
P Wohlsein ◽  
W Baumgärtner
Keyword(s):  

2020 ◽  
Vol 142 ◽  
pp. 55-61
Author(s):  
WT Li ◽  
YL Chiang ◽  
TY Chen ◽  
CL Lai

Eurasian otters Lutra lutra are listed as Near Threatened on the IUCN Red List and are imperiled by habitat loss, water pollution, and poaching. Harassment and attacks by stray animals are also recognized threats to the health of wild Eurasian otters. Pulmonary hair embolism is a possible complication in animals with deep traumatic injury, but to date no cases have been reported in wildlife. A free-ranging, adult male Eurasian otter was rescued due to severe emaciation and multiple bite wounds. The otter died 3 d after rescue and was necropsied. Grossly, a 1.5 × 1.5 × 1.5 cm firm nodule was observed in the left cranial lung lobe. Histologically, a fragment of hair shaft surrounded by multinucleated foreign body giant cells was observed in a medium-sized vein, and extensive eosinophilic infiltration was noted in the adjacent vascular wall and lung parenchyma. Based on the gross and histological findings, the pulmonary lesion was consistent with eosinophilic pneumonia and vasculitis induced by hair embolism. The presence of well-formed multinucleated foreign body giant cells and eosinophils may imply a late stage of foreign body reaction, and thus the presumptive source of hair embolism is an animal bite. This is the first report of pulmonary hair embolism associated with animal bite in a rescued free-ranging Eurasian otter.


Mammal Study ◽  
2019 ◽  
Vol 44 (2) ◽  
pp. 1
Author(s):  
Maria M. Altemus ◽  
John L. Koprowski ◽  
David E. Brown
Keyword(s):  

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