Oslerus osleri (Metastrongyloidea; Filaroididae) in Gray Wolves (Canis lupus) from Banff National Park, Alberta, Canada

2013 ◽  
Vol 49 (2) ◽  
pp. 422-426 ◽  
Author(s):  
Guilherme G. Verocai ◽  
Danna M. Schock ◽  
Manigandan Lejeune ◽  
Amy L. Warren ◽  
Pádraig J. Duignan ◽  
...  
Keyword(s):  
Canis Lupus ◽  
National Park ◽  
Gray Wolves ◽  
Banff National Park

scholarly journals River Otter (Lontra canadensis) Killed by Wolves (Canis lupus) during Winter in Northern Minnesota

2018 ◽  
Vol 131 (3) ◽  
pp. 252-253
Author(s):  
Thomas D. Gable ◽  
Steve K. Windels ◽  
Ian C. Rautio
Keyword(s):  
Canis Lupus ◽  
National Park ◽  
Lontra Canadensis ◽  
River Otter ◽  
Gray Wolves ◽  
Mammalian Predators ◽  
Voyageurs National Park

Few accounts exist of Gray Wolves (Canis lupus) killing small sympatric mammalian predators. In January 2017, we observed a River Otter (Lontra canadensis) that had been killed by wolves on the ice in Voyageurs National Park, Minnesota. This is one of only a few documented instances of wolves killing otters.

scholarly journals Breeding displacement in gray wolves (Canis lupus): Three males usurp breeding position and pup rearing from a neighboring pack in Yellowstone National Park

2021 ◽  
Author(s):  
Jeremy SunderRaj ◽  
Jack W. Rabe ◽  
Kira A. Cassidy ◽  
Rick McIntyre ◽  
Daniel R. Stahler ◽  
...  
Keyword(s):  
Canis Lupus ◽  
Yellowstone National Park ◽  
National Park ◽  
Dominance Hierarchy ◽  
Group Living ◽  
Female Mate Choice ◽  
Gray Wolves ◽  
Adult Females ◽  
Dominant Female ◽  
Territorial Group

Gray Wolves (Canis lupus) are territorial, group living carnivores that live in packs typically consisting of a dominant breeding pair and their offspring. Breeding tenures are relatively short and competitive, with vacancies usually occurring following a breeder’s death, and are often filled by unrelated immigrants or by relatives of the previous breeder. The frequency and conditions of active breeder displacements are poorly understood. Position changes in the dominance hierarchy are common yet rarely documented in detail. We describe a turnover in male breeding position in a wolf pack by males from a neighboring pack in mid-summer 2016 in Yellowstone National Park. Over the course of two months, three males from the Mollie’s pack displaced the breeding male of the neighboring Wapiti Lake pack, joined the pack’s two adult females, and subsequently raised the previous male’s four approximately three-month old pups. In the four years following the displacement (2017 to 2020), at least one of the intruding males has successfully bred with the dominant female and most years with a subordinate female (who was one of the pups at the time of displacement). The pack reared pups to adulthood each year. Male breeding displacements are likely influenced by male-male competition and female mate choice. These changes are the result of individuals competing to improve breeding position and may lead to increased pack stability and greater reproductive success. We report in detail on the behavior of a closely observed breeding displacement and we discuss the adaptive benefits of the change.

scholarly journals Social environment and genetics underlie body site‐specific microbiomes of Yellowstone National Park gray wolves ( Canis lupus )

2021 ◽  
Author(s):  
Alexandra L. DeCandia ◽  
Kira A. Cassidy ◽  
Daniel R. Stahler ◽  
Erin A. Stahler ◽  
Bridgett M. vonHoldt
Keyword(s):  
Social Environment ◽  
Canis Lupus ◽  
Yellowstone National Park ◽  
National Park ◽  
Body Site ◽  
Site Specific ◽  
Gray Wolves

scholarly journals Interactions of Brown Bears, Ursus arctos, and Gray Wolves, Canis lupus, at Katmai National Park and Preserve, Alaska

2004 ◽  
Vol 118 (2) ◽  
pp. 247 ◽  
Author(s):  
Tom S. Smith ◽  
Steven T. Partridge ◽  
John W. Schoen
Keyword(s):  
Canis Lupus ◽  
National Park ◽  
Ursus Arctos ◽  
Behavioral Plasticity ◽  
Additional Insight ◽  
Brown Bears ◽  
Gray Wolves ◽  
Katmai National Park

We describe several encounters between Brown Bears (Ursus arctos) and Gray Wolves (Canis lupus) that were observed at Katmai National Park and Preserve in southwest Alaska. Katmai Brown Bears and Gray Wolves were observed interacting in a variety of behavioral modes that ranged from agonistic to tolerant. These observations provide additional insight regarding the behavioral plasticity associated with bear-wolf interactions.

Leadership behavior in relation to dominance and reproductive status in gray wolves, Canis lupus

2002 ◽  
Vol 80 (8) ◽  
pp. 1405-1412 ◽  
Author(s):  
Rolf O Peterson ◽  
Amy K Jacobs ◽  
Thomas D Drummer ◽  
L David Mech ◽  
Douglas W Smith
Keyword(s):  
Travel Time ◽  
Parental Investment ◽  
Canis Lupus ◽  
Yellowstone National Park ◽  
National Park ◽  
Leadership Behavior ◽  
Scent Marking ◽  
Male And Female ◽  
Gray Wolves ◽  
Males And Females

We analyzed the leadership behavior of breeding and nonbreeding gray wolves (Canis lupus) in three packs during winter in 1997–1999. Scent-marking, frontal leadership (time and frequency in the lead while traveling), initiation of activity, and nonfrontal leadership were recorded during 499 h of ground-based observations in Yellowstone National Park. All observed scent-marking (N = 158) was done by breeding wolves, primarily dominant individuals. Dominant breeding pairs provided most leadership, consistent with a trend in social mammals for leadership to correlate with dominance. Dominant breeding wolves led traveling packs during 64% of recorded behavior bouts (N = 591) and 71% of observed travel time (N = 64 h). During travel, breeding males and females led packs approximately equally, which probably reflects high parental investment by both breeding male and female wolves. Newly initiated behaviors (N = 104) were prompted almost 3 times more often by dominant breeders (70%) than by nonbreeders (25%). Dominant breeding females initiated pack activities almost 4 times more often than subordinate breeding females (30 vs. 8 times). Although one subordinate breeding female led more often than individual nonbreeders in one pack in one season, more commonly this was not the case. In 12 cases breeding wolves exhibited nonfrontal leadership. Among subordinate wolves, leadership behavior was observed in subordinate breeding females and other individuals just prior to their dispersal from natal packs. Subordinate wolves were more often found leading packs that were large and contained many subordinate adults.

Wolf homesite attendance patterns

2004 ◽  
Vol 82 (9) ◽  
pp. 1512-1518 ◽  
Author(s):  
Marcel J Potvin ◽  
Rolf O Peterson ◽  
John A Vucetich
Keyword(s):  
Social Status ◽  
Canis Lupus ◽  
National Park ◽  
Prey Density ◽  
Isle Royale ◽  
Pack Size ◽  
Gray Wolves ◽  
Isle Royale National Park ◽  
Attendance Patterns ◽  
Size Number

Adult gray wolves, Canis lupus L., 1758, frequent den and rendezvous sites (homesites) during summer to bring food to pups and to ensure security of the pups. We monitored homesite attendance of several adult wolves from a single pack in Isle Royale National Park, Michigan, for 6 years. Pack size, number of pups, and prey density varied during the period of monitoring. Given the effect of prey density on wolf behavior, we predicted that wolf homesite attendance patterns would vary with prey density. We also examined the effects of varying pack size, social status, and number of pups on homesite attendance. Contrary to our expectations, prey density did not appear to be a significant predictor of homesite attendance statistics such as hours per day at the homesite or length of absence from the homesite. Furthermore, when prey density and social status remained the same, homesite attendance (hours/day) of individual wolves monitored for multiple years varied substantially. Our results show homesite attendance to be highly variable and not well predicted by prey density.

Effects of elk group size on predation by wolves

2002 ◽  
Vol 80 (5) ◽  
pp. 800-809 ◽  
Author(s):  
Mark Hebblewhite ◽  
Daniel H Pletscher
Keyword(s):  
Predation Risk ◽  
Group Size ◽  
Cervus Elaphus ◽  
Canis Lupus ◽  
National Park ◽  
Risk Model ◽  
Wolf Predation ◽  
Banff National Park ◽  
Density Relationship ◽  
Large Groups

Wolf-prey research has focused on single-prey systems in North America dominated by moose (Alces alces) or white-tailed deer (Odocoileus virginianus). Elk (Cervus elaphus) are social ungulates and the main prey item of wolves (Canis lupus) in Banff National Park (BNP), Alberta. Grouping behaviour may affect the functional response of predators by changing how predators encounter and kill prey. We studied wolf predation on elk in BNP during the winters of 1997–1998 and 1998–1999 and tested how elk group size affected the availability of and encounter rates with elk groups and attack success of wolves. Wolves encountered larger elk groups than expected based on availability, and killed more elk from large groups than expected based on numbers of encounters. Elk group size increased with elk density in BNP. Increased rates of encounter with and success of attacking large elk groups, and the positive group size – density relationship may be a mechanism for density-dependent predation. We developed a predation-risk model to test the prediction that grouping will benefit individual elk, given this predation regime. Elk appeared to adopt two different strategies to minimize predation risk: living in small herds that were rarely encountered by wolves or living in large herds that reduced their predation risk through dilution.

scholarly journals Seasonal and inter-annual variation in diet for gray wolves Canis lupus in Prince Albert National Park, Saskatchewan

2020 ◽  
Vol 2020 (3) ◽  
Author(s):  
Justin R. Shave ◽  
Seth G. Cherry ◽  
Andrew E. Derocher ◽  
Daniel Fortin
Keyword(s):  
Canis Lupus ◽  
National Park ◽  
Annual Variation ◽  
Gray Wolves ◽  
Prince Albert National Park

Interference competition between gray wolves and coyotes in Yellowstone National Park

2009 ◽  
Vol 87 (1) ◽  
pp. 56-63 ◽  
Author(s):  
J. A. Merkle ◽  
D. R. Stahler ◽  
D. W. Smith
Keyword(s):  
Canis Lupus ◽  
Yellowstone National Park ◽  
National Park ◽  
Interspecific Interactions ◽  
Interference Competition ◽  
Population Level ◽  
Physical Contact ◽  
Gray Wolves ◽  
Factors Influencing ◽  
Rare Opportunity

Factors influencing the outcome of interspecific interactions between sympatric carnivores, along with population-level consequences, are not clearly understood. The reintroduction of gray wolves ( Canis lupus L., 1758) to Yellowstone National Park provides a rare opportunity to study interactions with coyotes ( Canis latrans Say, 1823), which had lived in the absence of wolves for >60 years. We evaluated direct interactions between wolves and coyotes to identify factors influencing the outcomes of interspecific interactions and describe the context and degree of competition and coexistence. Using radio-collared wolves, we documented 337 wolf–coyote interactions from 1995 to 2007. The majority (75%) of interactions occurred at ungulate-carcass sites. Wolves initiated the majority of encounters (85%), generally outnumbered coyotes (39%), and dominated (91%) most interactions. Wolves typically (79%) chased coyotes without physical contact; however, 25 interactions (7%) resulted in a coyote death. Interactions decreased over time, suggesting coyote adaptation or a decline in coyote density. In the majority (80%) of fatal interactions, wolves outnumbered coyotes. However, wolves did not outnumber coyotes in interactions (n = 18) where coyotes chased or attacked/harassed wolves. Our results suggest that wolves are the dominant canid, group size may influence the outcome of interactions, and coyotes must benefit from the access to carrion at wolf-killed carcasses.

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