scholarly journals Blanding's Turtle, Emydoidea blandingii, Habitat Use During Hibernation in Eastern Ontario

2010 ◽  
Vol 124 (3) ◽  
pp. 263 ◽  
Author(s):  
David C. Seburn
Keyword(s):  
Habitat Use ◽  
Range Limit ◽  
Emydoidea Blandingii ◽  
Blanding's Turtle ◽  
Northern Range Limit ◽  
Eastern Ontario ◽  
Blanding’S Turtle

Seven Blanding's Turtles (Emydoidea blandingii) were followed using radiotelemetry to determine their habitat use during hibernation near Ottawa, Ontario. During May to August, five of the seven turtles occupied wetlands in which they would eventually hibernate. The turtles hibernated in five different wetlands: three in Organic Shallow Marsh Ecosites and two in Organic Thicket Swamp Ecosites. One Blanding's Turtle over-wintered in a temporary marsh that did not form until October. Blanding's Turtles do not appear to be limited in their choice of suitable hibernation sites even near the northern range limit of the species.

scholarly journals Emydoidea blandingii (Holbrook 1838) – Blanding’s Turtle

2008 ◽  
pp. 015.1-015.12 ◽  
Author(s):  
Justin Congdon ◽  
Terry Graham ◽  
Tom Herman ◽  
Jeffrey Lang
Keyword(s):  
Emydoidea Blandingii ◽  
Blanding's Turtle ◽  
Blanding’S Turtle

Population size and spatial ecology of Blanding’s Turtle (Emydoidea blandingii) in South March Highlands, Ottawa, Ontario, Canada

2015 ◽  
Vol 93 (7) ◽  
pp. 509-514 ◽  
Author(s):  
Caleb T. Hasler ◽  
Kevin Robinson ◽  
Nick Stow ◽  
Shawn R. Taylor
Keyword(s):  
Population Size ◽  
Spatial Ecology ◽  
Road Construction ◽  
Home Range Size ◽  
Adult Males ◽  
Emydoidea Blandingii ◽  
Blanding's Turtle ◽  
The Road ◽  
Gravid Females ◽  
Blanding’S Turtle

Between 2010 and 2011, an arterial road was constructed within provincially significant wetlands in the South March Highlands (SMH) located in Ottawa, Ontario, Canada. The wetlands and adjacent upland areas were determined to be sensitive habitat for Blanding’s Turtles (Emydoidea blandingii (Holbrook, 1838)) during the approval and permitting process, and a population study was required as part of the road construction project. The study consisted of a 4-year mark–recapture program and a movement study of radio-tagged adult turtles. General findings included the identification of 27 adult males and 55 females and a population estimate of 93 adults (95% Cl: 86–118). A 1:2.32 male to female sex bias was also found. Mean home-range size was 19.06 ha and tagged turtles moved, on average, more per observation in 2013 (191.40 m compared with 89.75 and 123.04 m in 2011 and 2012, respectively). Previously reported differences in movement patterns between males, females, and gravid females were not observed. The SMH Blanding’s Turtle population should be closely monitored because urban development continues in the area, which may further reduce the population size. Understanding the biology of imperiled populations across species’ ranges is necessary to promote conservation and adaptive wildlife management.

scholarly journals EFFECT OF RACCOON (PROCYON LOTOR) REDUCTION ON BLANDING’S TURTLE (EMYDOIDEA BLANDINGII) NEST SUCCESS

2016 ◽  
pp. 39-44 ◽  
Author(s):  
Rachael E. Urbanek ◽  
Gary A. Glowacki ◽  
Clayton K. Nielsen
Keyword(s):  
Procyon Lotor ◽  
Nest Success ◽  
Lake County ◽  
Artificial Nests ◽  
Emydoidea Blandingii ◽  
Blanding's Turtle ◽  
Abundance Estimates ◽  
Predator Management ◽  
Blanding’S Turtle

The Lake County Forest Preserve District has monitored a state-endangered Blanding’s Turtle (Emydoidea blandingii) population at two adjoining nature preserves along the Illinois–Wisconsin border since 2004. Prior to predator management, 92.3% of documented and unprotected natural Blanding’s Turtle nests (12 of 13) and 88% of monitored artificial nests have been at least partially depredated. The goal of this study was to determine the efficacy of subsidized Raccoon (Procyon lotor) removal efforts in increasing the nest success of Blanding’s Turtles. During April–May 2013 and 2014, we captured and euthanized 78 Raccoons from our 2 km2 study area. We estimated pre-removal abundance estimates using the Leslie depletion method; it appeared that we removed 83–89% of the Raccoons from the study area each year and pre-removal density estimates were 37.5% lower in 2014 than 2013. During the study period, we monitored 22 Blanding’s Turtle in situ unprotected nests. In 2013, one of seven (14%) Blanding’s Turtle nests was partially depredated and no nests were completely depredated, indicative of a successful impact of Raccoon removal on Blanding’s Turtle nest success. However in 2014, nine of 15 (60%) Blanding’s Turtle nests were depredated. Our results provide some evidence that removal of Raccoons may have increased Blanding’s Turtle nest success but other factors, such as a functional response of surviving Raccoons or depredation by other subsidized predators may be contributing to decreased nest success.

scholarly journals Morphology, reproduction, habitat use, and hibernation of Red-bellied Snake (Storeria occipitomaculata) near its northern range limit

2019 ◽  
Vol 132 (2) ◽  
pp. 150-162 ◽  
Author(s):  
Nicholas A. Cairns ◽  
Pamela L. Rutherford ◽  
Drew J. Hoysak
Keyword(s):  
Habitat Use ◽  
Activity Patterns ◽  
Range Limit ◽  
Trade Offs ◽  
Climatic Environment ◽  
Northern Regions ◽  
Northern Range Limit ◽  
The Relationship ◽  
Ant Mounds ◽  
Cool Climate

Northern regions limit ectotherms to relatively short periods of feeding and breeding interrupted by long periods of inactivity. This may force cool-climate ectotherms into different ecological or demographic trade-offs than their southern conspecifics. Our aim is to examine demography, morphology, reproduction, habitat use, and hibernation by populations of Red-bellied Snake (Storeria occipitomaculata) near their northern range limit. This research was conducted in southwestern Manitoba and data on summer activity were collected from April to September 2007–2009 using coverboard and pedestrian surveys. Hibernation sites were monitored over three winters (2007–2008, 2008–2009, and 2009–2010), and thermal profiles of Formica ant mounds were collected in 2008–2009 and 2009–2010. Females reached sexual maturity at a smaller size than most other populations that have been reported but appear to have similar clutch sizes to the rest of the range. The majority of adult females captured at our summer sites were gravid (96%) suggesting annual reproduction, and activity patterns suggest fall breeding. Near its northern range maxima, this species appears to use relatively warm habitat, have rapid reproduction, and co-opt ant mounds to survive in a difficult climatic environment. Much remains unknown and future studies should further examine the variation in size at maturity and the relationship between body size and clutch size. In addition, little is known about diet, benefits of fall mating, use of open prairie habitats, and late-season migration by S. occipitomaculata.

Hypotheses of aging in a long-lived vertebrate, Blanding's turtle (Emydoidea blandingii)

2001 ◽  
Vol 36 (4-6) ◽  
pp. 813-827 ◽  
Author(s):  
J.D. Congdon ◽  
R.D. Nagle ◽  
O.M. Kinney ◽  
R.C. van Loben Sels
Keyword(s):  
Emydoidea Blandingii ◽  
Blanding's Turtle ◽  
Blanding’S Turtle

Temperature and site selection by Blanding’s Turtles (Emydoidea blandingii) during hibernation near the species’ northern range limit

2009 ◽  
Vol 87 (9) ◽  
pp. 825-834 ◽  
Author(s):  
C. B. Edge ◽  
B. D. Steinberg ◽  
R. J. Brooks ◽  
J. D. Litzgus
Keyword(s):  
Dissolved Oxygen ◽  
Water Depth ◽  
Respiratory Acidosis ◽  
Ice Cover ◽  
Range Limit ◽  
Emydoidea Blandingii ◽  
Northern Range Limit ◽  
Overwintering Survival ◽  
Prolonged Dormancy ◽  
Selection Of

Many animals that live in northern climates enter a state of prolonged dormancy during winter. These animals possess a suite of physiological and behavioural adaptations that minimize threats to survival while overwintering. There are three major threats to overwintering survival: metabolic and respiratory acidosis, freezing, and predation. Selection of hibernation sites should minimize these threats. We monitored dissolved oxygen, water depth, and temperature at overwintering locations of Blanding’s Turtles ( Emydoidea blandingii (Holbrook, 1838)) and at stations located haphazardly in six different habitat types over two winters in Algonquin Park, Ontario, Canada. Water depth and dissolved oxygen in overwintering sites used by turtles were similar to those measured at haphazard stations. In contrast, estimated turtle body temperatures (~0 °C) were significantly lower and less variable than water temperatures measured at haphazard stations. These data and those reported elsewhere suggest that there are two alternatives for selection of suitable hibernacula by anoxia tolerant turtles. In areas where there is periodic access to aerial oxygen, turtles select sites where ice cover may not be present for the entire winter, but in areas where ice cover restricts access to air, turtles select sites where water temperatures are close to 0 °C.

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