scholarly journals Ecological Study of River Otters in Grand Teton National Park

1982 ◽  
Vol 6 ◽  
pp. 46-51
Author(s):  
Joseph Hall
Keyword(s):  
National Park ◽  
Ecological Study ◽  
Distribution Density ◽  
Activity Patterns ◽  
Field Work ◽  
Snake River ◽  
Grand Teton National Park ◽  
River Otters ◽  
And Behavior

The primary goals of the study are to obtain information on the distribution, density, movements, activity patterns and behavior of otters on the Snake River from Jackson Lake Dam to Moose. Most observations were concentrated along the 3.5 mile section from the dam to and including the Oxbow. This report covers field work during the periods of March 7-17 and August 11 - September 25. No otters were seen in March but they were observed for 28 hours during 88 hours afield in August and September. Additionally, Mr. John Turner of Triang1e-X Float Trips and Mr. Dick Barker of Barker-Ewing Float Trips were most cooperative in obtaining sightings of otters made on the river by their parties between Deadman Bar #2 and Moose.

scholarly journals Ecological Study of River Otters in Grand Teton National Park

1983 ◽  
Vol 7 ◽  
pp. 51-52
Author(s):  
Joseph Hall
Keyword(s):  
National Park ◽  
Ecological Study ◽  
National Park Service ◽  
Distribution Density ◽  
Intrinsic Value ◽  
Activity Patterns ◽  
Snake River ◽  
River Otters ◽  
Park Service ◽  
And Behavior

Accumulation of data on the distribution, density, movements, activity patterns, and behavior of river otters, primarily on the Snake River, is the goal of this study. Such information has intrinsic value and also should be useful to the National Park Service in enhancing the welfare of this interesting member of the park's fauna.

scholarly journals Behavior of River Otters in the Oxbow Bend Vicinity, Grand Teton National Park

1996 ◽  
Vol 20 ◽  
pp. 50-51
Author(s):  
Joseph Hall
Keyword(s):  
National Park ◽  
Activity Patterns ◽  
Field Work ◽  
Snake River ◽  
Grand Teton National Park ◽  
Feeding Sites ◽  
River Otters ◽  
Resting Sites ◽  
Daytime Activity

The 1996 project was a continuation of the study begun in 1995 - to obtain information on movements, sociability, and activity patterns of river otters in the Oxbow region of the Snake River within Grand Teton National Park. Particular emphasis was on nocturnal patterns as documented by automatic cameras activated by buried treadle­switches in places otters were known to frequent, such as latrines, resting sites and feeding sites. Daytime activity was monitored both by the cameras and by routine canoe patrols. Field work was carried out July 5- August 5.

scholarly journals Ecological Study of River Otters in Grand Teton National Park

1984 ◽  
Vol 8 ◽  
pp. 39-41
Author(s):  
Joseph Hall
Keyword(s):  
Social Interactions ◽  
National Park ◽  
Ecological Study ◽  
National Park Service ◽  
Activity Patterns ◽  
Habitat Preferences ◽  
Snake River ◽  
River Otters ◽  
The Future ◽  
Park Service

The objectives of this study are to obtain information about habitat preferences, movements, activity patterns, social interactions, distribution and density of otters within the park, primarily on the Snake River between the Jackson Lake Dam and Moose. This type of information is valuable as a basis of comparison with what is known about otters elsewhere and also could guide the National Park Service in altering policies or managing habitats to the benefit of otters, should this be desired in the future.

scholarly journals River Otter Distribution and Food Habits in Grand Teton National Park as Part of an Ongoing Project in the GYE

2015 ◽  
Vol 38 ◽  
pp. 75-78
Author(s):  
Kelly Pearce ◽  
Tom Serfass
Keyword(s):  
National Park ◽  
Activity Patterns ◽  
Public Support ◽  
Primary Objective ◽  
Camera Traps ◽  
Lontra Canadensis ◽  
Flagship Species ◽  
River Otter ◽  
Grand Teton National Park ◽  
River Otters

Grand Teton National Park is part of the known range of the North American river otter, however not much is known about this semi-aquatic mammal within the park. The results presented here are part of a larger project to investigate the potential of the river otter (Lontra canadensis) to serve as an aquatic flagship (species that engender public support and action) for the Greater Yellowstone Ecosystem. River otters, known for their charismatic behavior have the potential to serve as an aquatic flagship species to promote conservation of aquatic ecosystems. The primary objective of this portion of the study was to identify river otter latrines on portions of the Snake River, between Flagg Ranch and Jackson Lake, and between Jackson Lake Dam and Pacific Creek, collect river otter scats to determine diet of the river otter, and employ remote cameras to determine activity patterns of the river otters. Between 20 June and 1 July 2015, 26 river otter latrines were identified during shoreline surveys, 186 river otter scats were collected, and cameras were deployed at 6 latrines between 7 July and 24 August 2015. River otter scats have been cleaned and prepared for analysis, but have not all been processed to date. Camera traps recorded 222 images, of which 7% (n = 14) were of carnivores, 70% (n = 155) were of non-carnivore mammals, and 9% (n = 22) were of birds. River otters were detected at 1 of the 6 latrines, a total of 5 independent times during the study.

scholarly journals Behavior of River Otters in the Oxbow Bend Vicinity, Grand Teton National Park 1997 Season

1997 ◽  
Vol 21 ◽  
pp. 26-28
Author(s):  
Joseph Hall
Keyword(s):  
National Park ◽  
Field Work ◽  
Diurnal Activity ◽  
Grand Teton National Park ◽  
River Otters ◽  
The Third

1997 was the third and final season devoted to gaining information on the behavior of river otters with most emphasis on nocturnal and diurnal activity. As in the 1995 and 1996 seasons, six automatic camera monitors, activated by treadle switches, were put out at sites often frequented by these animals. In addition, canoes were frequently used for daytime patrols. Field work occurred from July 8 - August 6.

scholarly journals Ecology of River Otters in Grand Teton National Park

1986 ◽  
Vol 10 ◽  
pp. 92-94
Author(s):  
Joseph Hall
Keyword(s):  
National Park ◽  
Activity Patterns ◽  
Habitat Preferences ◽  
Activity Cycle ◽  
Grand Teton National Park ◽  
River Otters ◽  
Additional Information

Obtaining additional information on populations, movements, activity patterns and habitat preferences are the main goals of this study. Special efforts were made to try to round out an understanding of the nocturnal phase of an otter's 24-hour activity cycle.

scholarly journals Summer Habitat Preferences and Activity Patterns of River Otters In Grand Teton National Park

2001 ◽  
Vol 25 ◽  
pp. 63-71
Author(s):  
Joseph Hall
Keyword(s):  
Natural History ◽  
National Park ◽  
Habitat Preferences ◽  
Lontra Canadensis ◽  
Snake River ◽  
Service Research ◽  
Grand Teton National Park ◽  
River Otters ◽  
The North ◽  
History Of

I studied the natural history of river otters. (Lontra canadensis) during the summers of 1982-1986 and 1995-1997 in Grand Teton National Park, Wyoming. Habitat preferences were analyzed by tallying sightings on 5 types of habitat along 16 km of the Snake River. Otters were seen on all 5 habitat types and exhibited a strong preference for the logjam/beaver lodge category. Beavers and otters sometimes occupied a lodge simultaneously. I recorded daytime activity directly in 1982 and noted a large peak in mid-morning and a small one in late afternoon. To obtain information indirectly on round-the-clock activity I employed 6 modified camera monitors activated by treadle-switches at frequently used sites. Pooled records for 3 summers showed almost two and a half times higher activity by day than by night, a finding opposite of what was expected. The hypothesis I suggest is that diurnal activity exceeds nocturnal activity because of the habituation of otters to humans over a half century's tradition of frequent exposure and non-harassment in the national park. In the summers of 1982-1986 and 1995-1997 I made a study of the natural history of river otters (Lontra canadensis), in Grand Teton National Park under auspices of the University of Wyoming - National Park Service Research Center. Occasional observations were made along the Snake River from Flagg Ranch near the north boundary of the park to the north end of Jackson Lake and from Pacific Creek to Deadman's Bar. However, the 3 km stretch of river from just below Jackson Lake Dam to the Oxbow was the site of most intensive study. (See Fig. 1)

scholarly journals Activity Patterns of River Otters in the Oxbow Bend Vicinity, Grand Teton National Park

1995 ◽  
Vol 19 ◽  
pp. 31-32
Author(s):  
Joseph Hall
Keyword(s):  
Special Interest ◽  
National Park ◽  
Activity Patterns ◽  
Diurnal Activity ◽  
Nocturnal Activity ◽  
Grand Teton National Park ◽  
River Otters ◽  
Lutra Canadensis

Goals of the project were to obtain information on daily movements and activity patterns of River otters (Lutra canadensis), particularly nocturnal activity, to supplement data on diurnal activity obtained from a previous study. Of special interest was to determine whether or not nocturnalism activity occur which are similar to those seen by day. Additionally, observations of any evidence of fidelity to specific habitat sites documented in previous years were to be recorded,

scholarly journals River Reach Delineations and Beaver Movement in Grand Teton National Park

2015 ◽  
Vol 38 ◽  
pp. 37-47
Author(s):  
William Gribb ◽  
Henry Harlow
Keyword(s):  
National Park ◽  
Single Channel ◽  
Wave Length ◽  
Theoretical Background ◽  
Three Dimensions ◽  
Snake River ◽  
River Continuum ◽  
Grand Teton National Park ◽  
Meandering Channel ◽  
River Reach

This project had two components, with the first component providing a background for the second component. Water resources in Grand Teton National Park (GTNP) are both unregulated and regulated by human management. The Jackson Lake Dam and the ponds scattered across the park influence the flow of water. In the process of managing the water it is important to have knowledge of the different components of the streams through which the water flows. One component of this project was to examine the different segments of the major rivers in GTNP and identify the river forms that are displayed by the different reaches of the Snake River above and below Jackson Lake, Buffalo Fork and Pacific Creek. The river form can be segregated into three main categories; the single channel, the meandering channel and the braided channel (Knighton 1984). The different river forms are part of the overall structural composition of the river and can be used to delineate the segments or reaches of the river. The river continuum concept presented by Vannote et al. (1980) provides a theoretical background upon which to construct the river reach system. In 2007, Nelson (2007) completed a reach system project while investigating the fluvial geomorphology of the Snake River below Jackson Lake Dam (Figure 1.). His 20 river reaches provided a zonation of the river that incorporated a range of geomorphic features. This same type of system can be used throughout the GTNP so that researchers have a common spatial unit designation when referencing portions of the Snake River and its tributaries. Ackers (1988) in his work on alluvial channel hydraulics identified three dimensions of meanders that should be considered; width, depth and slope. He further agreed with Hey (1978) that there are nine factors that define river geometry and that these should be considered as well: average bank full velocity, hydraulic mean depth, maximum bank full depth, slope, wave length of bed forms, their mean height, bank full wetted perimeter, channel sinuousity and arc length of meanders. Nelson’s work (Nelson 2007) added another parameter by including a braiding index into the representation of river reach designations. In a more recent work, the Livers and Wohl (2014) study confirmed Nelson’s approach by comparing reach characteristics between glacial and fluvial process domains using similar reach designation characteristics to determine reach differences.

scholarly journals Hybridization of Snake River Cutthroat in the Lower Gros Ventre River

2006 ◽  
Vol 30 ◽  
pp. 110-113
Author(s):  
Ryan Kovach ◽  
Lisa Eby
Keyword(s):  
Exotic Species ◽  
National Park ◽  
Cutthroat Trout ◽  
Snake River ◽  
Oncorhynchus Clarki ◽  
Oncorhynchus Clarkii ◽  
Grand Teton National Park ◽  
Water Diversions ◽  
Yellowstone Cutthroat Trout ◽  
Special Concern

The cutthroat trout Oncorhynchus clarki is Wyoming's only native trout. The Yellowstone cutthroat trout (Oncorhynchus clarkii bouvieri) is designated as a "species of special concern" by a number of agencies and conservation groups. Although the Yellowstone cutthroat trout has recently avoided federal listing because of robust headwater populations (USFWS 2006), they face continued threats across their range. The fine-spotted Snake River native trout is a morphologically divergent ecotype of the Yellowstone subspecies, although it is not genetically distinguishable (Allendorf and Leary 1988, Novak et al. 2005). The Gros Ventre, an important tributary of the Snake River located partially in Grand Teton National Park, historically supported robust populations of fine­ spotted Snake River cutthroat trout. Principal threats to Gros Ventre native trout, especially in the lower end of the drainage within the park boundaries, include both water diversions (loss of water and fish into irrigation ditches) and presence of exotic species.

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