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Cooperative problem solving in giant otters (Pteronura brasiliensis) and Asian small-clawed otters (Aonyx cinerea)

Martin Schmelz, Shona Duguid, Manuel Bohn, Christoph J. Völter
2017 Animal Cognition  
In the first experimental study of otter social cognition, we presented two species-giant otters and Asian small-clawed otters-with a cooperative problemsolving task.  ...  Both giant otters and Asian small-clawed otters were able to solve the task successfully when the coordination requirements were minimal.  ...  We thank the Zoo Leipzig, particularly Kerstin Tischmeyer, Christian Patzer, Michael Ernst and Fabian Schmidt, for the access to the otters, and we are very grateful for the pleasant collaborative experience  ... 
doi:10.1007/s10071-017-1126-2 pmid:28840405 pmcid:PMC5640742 fatcat:d6viaftllzfrbez4ygh4xosr34

Relating dispersal and range expansion of California sea otters

Martin Krkošek, Jean-Sébastien Lauzon-Guay, Mark A. Lewis
2007 Theoretical Population Biology  
We developed a stage-structured integrodifference equation (IDE) model of the California sea otter range expansion that occurred between 1914 and 1986.  ...  These otters may have been fat-tailed accelerating invaders or they may have followed a piece-wise linear spread first over kelp forests and then over sandy habitats.  ...  California sea otters The California sea otter was hunted to near extinction in the early 1900s.  ... 
doi:10.1016/j.tpb.2007.01.008 pmid:17400266 fatcat:exkwha4ihrc5dctd7czszsfezq

Potential of restored gravel pits to provide suitable habitats for Eurasian otters in anthropogenic landscapes

Daniel Martin-Collado, María D. Jiménez, Carlos Rouco, Lucia Ciuffoli, Rocío de Torre
2020 Restoration Ecology  
We found that otter use of water bodies was not related to the natural or artificial origin of the water.  ...  We integrated 34 environmental variables with otter habitat use, measured by three spraint marking intensity indicators.  ...  López-Martín et al. 1998; Clavero et al. 2010; Teresa et al. 2014) .  ... 
doi:10.1111/rec.13129 fatcat:2slupjvwbnfgbcg5rfmfb2zdie

Non-invasive hair sampling of Neotropical otters

Nuno M. Pedroso, Sofia V. Dias, Thais Rovere Diniz-Reis, Margarida Santos-Reis, Luciano Martins Verdade
2018 Biota Neotropica  
Traps were baited with otter fresh spraints from other river locations. From the 23 traps, 10 (43.7%) were successful in collecting otter hairs, mostly guard-hair.  ...  However, hair trapping is scarcely used in otters, due to their aquatic habits.  ...  To avoid species misidentification, all sampled hairs were processed for observation of cuticular impressions and medullar pattern (Quadros & Monteiro-Filho 2006a , Martin et al. 2009 ) and identified  ... 
doi:10.1590/1676-0611-bn-2018-0579 fatcat:ubu7rzlisbbmhcsdfxqioiwd6e

Gene transcription in sea otters (Enhydra lutris); development of a diagnostic tool for sea otter and ecosystem health

LIZABETH BOWEN, A. KEITH MILES, MICHAEL MURRAY, MARTIN HAULENA, JUDY TUTTLE, WILLIAM VAN BONN, LANCE ADAMS, JAMES L. BODKIN, BRENDA BALLACHEY, JAMES ESTES, M. TIM TINKER, ROBIN KEISTER (+1 others)
2011 Molecular Ecology Resources  
(Enhydra lutris); sea otter-specific qPCR primer sequences for the genes of interest are defined.  ...  We establish a 'reference' range of transcripts for each gene in a group of clinically healthy captive and free-ranging sea otters.  ...  Materials and methods Captive otters Free-ranging otters Sea otters were captured in Alaska, along the south-western Alaska Peninsula (n = 25; summer 2009; Table 2 ).  ... 
doi:10.1111/j.1755-0998.2011.03060.x pmid:21848762 fatcat:bkrdh3ndtzhcjoy4fx7zwhi2ay

Ecological drivers of variation in tool-use frequency across sea otter populations

Jessica A. Fujii, Katherine Ralls, Martin Tim Tinker
2014 Behavioral Ecology  
Sea otters are well-known tool users, employing objects such as rocks or shells to break open hard-shelled invertebrate prey.  ...  However, little is known about how the frequency of tool use varies among sea otter populations and the factors that drive these differences.  ...  Estes for allowing the use of Alaskan sea otter foraging data. The study design benefited from discussions with Drs J. Estes, P. Raimondi, and R. Mehta. We would also like to thank Dr E.  ... 
doi:10.1093/beheco/aru220 fatcat:tww7vxvenfa7hj2gnws7a5kz6i

SPACE USE AND SOCIALITY OF RIVER OTTERS (LONTRA CANADENSIS) IN MINNESOTA

Thomas A. Gorman, John D. Erb, Brock R. McMillan, Daniel J. Martin
2006 Journal of Mammalogy  
The river otter (Lontra canadensis) has a complex social system, which varies widely across its range.  ...  We examined patterns of space use and social interactions for a native population of river otters in southeastern Minnesota.  ...  of individual otters overlapped with at least 1 other otter at this scale.  ... 
doi:10.1644/05-mamm-a-337r1.1 fatcat:wmlzona2d5cmnj6lcurvrtljva

Setting Realistic Recovery Targets for Two Interacting Endangered Species, Sea Otter and Northern Abalone

Iadine Chadès, Janelle M. R. Curtis, Tara G. Martin
2012 Conservation Biology  
Removing sea otters had a marginally positive effect on the abalone population but only when we assumed a functional response with strong predation pressure.  ...  Although sea otters were predicted to recover, achieving abalone recovery targets failed even when threats to abalone such as predation and poaching were reduced.  ...  Acknowledgments We are indebted to the following individuals for sharing their wealth of expertise on sea otter and abalone ecology or for providing access to their data: D. Bardos, A. Campbell, L.  ... 
doi:10.1111/j.1523-1739.2012.01951.x pmid:23083059 fatcat:uk6cb3byene6fpjav5vl4qkhwy

Diel activity patterns of river otters (Lontra canadensis) in southeastern Minnesota

Daniel J. Martin, Brock R. McMillan, John D. Erb, Thomas A. Gorman, Daniel P. Walsh
2010 Journal of Mammalogy  
Overall, the PLA of otters in our study area was influenced by abiotic factors, and movement rates of otters were influenced by abiotic and biotic factors.  ...  The PLA of otters was highest during breeding season, lowest during winter, and intermediate in summer months. In addition, the PLA of otters decreased slightly with increasing temperature.  ...  Fischer captured many of the otters for this study, and S. Gappa provided some assistance with capture. M. Morath, DVM, conducted surgery to implant radiotransmitters.  ... 
doi:10.1644/09-mamm-a-083.1 fatcat:fdwtv4zgnfd2hblhbcxa6aedoi

Site Characteristics of River Otter (Lontra canadensis) Natal Dens in Minnesota

Thomas A. Gorman, John D. Erb, Brock R. McMillan, Daniel J. Martin, Jessica A. Homyack
2006 The American midland naturalist  
Knowledge of the habitat and spatial characteristics of natal dens used by female river otters (Lontra canadensis) is limited to a few observations.  ...  Our results suggest that to promote successful reproduction of river otter populations, managers should protect potential denning sites in upland habitats adjacent to bodies of water.  ...  Natal dens sites used by otters in southeastern Minnesota were usually located far from water or on steep slopes, areas generally not considered typical otter habitat.  ... 
doi:10.1674/0003-0031(2006)156[109:scorol]2.0.co;2 fatcat:c3xwfqvow5bj5eedql4v4fmaui

Algorithms for Component-Based 3D Modeling

Andrea Neumayr, Martin Otter
2019 Proceedings Name  
The user's view of Modia3D was introduced in (Neumayr and Otter, 2018) to show the very flexible definition of 3D systems.  ...  The Modelica MultiBody library (Otter et al., 2003) was implemented in 2003 and since this time only minor improvements have been made.  ... 
doi:10.3384/ecp19157383 dblp:conf/modelica/NeumayrO19 fatcat:djxxogucovhpdb5h6kglpbdmmm

The /O/ in OVER is different from the /O/ in OTTER: Phonological effects in children with and without dyslexia

Anna M. T. Bosman, Martin van Leerdam, Beatrice de Gelder
2000 Developmental Psychology  
., OTTER) coincides with the letter sound /o/ (i.e., the phoneme).  ...  As in children without dyslexia who were also asked to use phonemes, they were faster naming congruent stimuli (e.g., OTTER) than incongruent stimuli (e.g., 2 A group of 15 children with severe reading  ... 
doi:10.1037//0012-1649.36.6.817 pmid:11081704 fatcat:25yqd7shlbevnfozuakad5iv7a

Survival and Cause-specific Mortality of a Protected Population of River Otters In Minnesota

THOMAS A. GORMAN, BROCK R. McMILLAN, JOHN D. ERB, CHRISTOPHER S. DEPERNO, DANIEL J. MARTIN
2008 The American midland naturalist  
We monitored survival of river otters from Apr. 2002-May 2004, for a total of 439 river otter-months.  ...  In harvested otter populations, these travel corridors are frequently targeted by otter trappers, and may produce balanced or male-biased harvest.  ... 
doi:10.1674/0003-0031(2008)159[98:sacmoa]2.0.co;2 fatcat:7meq7oddinaslabxtdi2qfkwjm

The /O/ in OVER is different from the /O/ in OTTER: Phonological effects in children with and without dyslexia

Anna M. T. Bosman, Martin van Leerdam, Beatrice de Gelder
2000 Developmental Psychology  
., OTTER) coincides with the letter sound /o/ (i.e., the phoneme).  ...  As in children without dyslexia who were also asked to use phonemes, they were faster naming congruent stimuli (e.g., OTTER) than incongruent stimuli (e.g., 2 A group of 15 children with severe reading  ... 
doi:10.1037/0012-1649.36.6.817 fatcat:l4unpxwvorgubhjzxhkqpnwsj4

XXIV.—Paraonyx, a new genus of clawless otter discovered by Capt. J. E. Philipps, M.C., in Central Africa

Martin A.C. Hinton
1921 Annals and Magazine of Natural History  
., Nothing is yet known of tile habits of these remarkable otters.  ...  :Personally I incline to the latter view as regards the clawless otters ; for in the broader details Of their structure they are all as much otters as is Lutra itself, and ).  ... 
doi:10.1080/00222932108632510 fatcat:elc6kwma5bf4vkfeoc3r7zb3qy
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