Behavior patterns of river otters
Authors(s): J. Hall
Publication:
Publisher:
Publication Date: 0000-00-00
Type: final report
Location:
Abstract: Objectives Direct observations of otter behavior by day to locate current activity sites of crossing-trails, latrines and feeding areas. Indirect documentation by day and night of activity as recorded by camera monitors activated by treadle switches. Study area on the Snake River extends from Jackson Lake Dam to and including the Oxbow. Main goal is to determine relative intensity of nocturnal versus diurnal activity. Findings and Status During the period July 7-August 6, we had much better success observing otters from canoes than in 1995 or 1996. Otters appeard to be more abundant than in previous years and were much more tolerant of humans, allowing close approaches. Six monitors were operated for a total of 1700 hours. They yielded 21 images of otters, a ratio of 81 camera hours per photo. Contrary to expectations, these results, combined with those of 1995 and 1996, show that otters are substantially more active by day than by night. Status of project: completed.
Keywords: animal, behavior, mammal, Mustelidae, otter, river otter, food, forage, Snake River, Grand Teton National Park, Jackson Lake, population, human activity, Lutra canadensis
| BIBLIOGRAPHY ID | 1596 |
| REF TYPE | Report |
| AUTHORS | J. Hall |
| PUB DATE | 0000-00-00 |
| DATE STR | 0000-00-00 |
| PUB TITLE1 | |
| PUB TITLE2 | |
| DOC TITLE | Behavior patterns of river otters |
| PAGE DESC | |
| LOCATION | |
| ACADEMIC DEPT | |
| UNIVERSITY | |
| DOC TYPE | final report |
| PUB VOLUME | 4203 |
| PUB NUMBER | |
| PUB EDITION | |
| EDITORS | |
| PUBLISHER | |
| TRANSLATOR | |
| ISBN | |
| LIBRARY INFO | |
| SOURCE | |
| KEYWORDS | animal, behavior, mammal, Mustelidae, otter, river otter, food, forage, Snake River, Grand Teton National Park, Jackson Lake, population, human activity, Lutra canadensis |
| ABSTRACT | Objectives
Direct observations of otter behavior by day to locate current activity sites of crossing-trails, latrines and feeding areas. Indirect documentation by day and night of activity as recorded by camera monitors activated by treadle switches. Study area on the Snake River extends from Jackson Lake Dam to and including the Oxbow. Main goal is to determine relative intensity of nocturnal versus diurnal activity.
Findings and Status
During the period July 7-August 6, we had much better success observing otters from canoes than in 1995 or 1996. Otters appeard to be more abundant than in previous years and were much more tolerant of humans, allowing close approaches. Six monitors were operated for a total of 1700 hours. They yielded 21 images of otters, a ratio of 81 camera hours per photo. Contrary to expectations, these results, combined with those of 1995 and 1996, show that otters are substantially more active by day than by night.
Status of project:
completed. |
| NOTES | |
| URLADDRESS | http://science.nature.nps.gov/servlet/Prmt_ReportSearchView?REPORT_ID=4203 |
| COPYRIGHT | |
Posted on
Sun, July 31, 2011
by Beringia South