First Year Survival of Hatchling Eastern Box Turtles (Terrapene carolina carolina) at Their Northern Range Limit in Michigan's Lower Peninsula

Altobelli, Joseph T.; Laarman, Patrick B.; Moore, Jennifer A.

doi:10.1670/19-129

Cited by 4 publications

(9 citation statements)

References 67 publications

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“…Altobelli et al (2021) found that only 50% of Eastern Box Turtle ( Terrapene carolina ) hatchlings in the Lower Peninsula of Michigan survived from autumn nest dispersal to overwintering. However, the hatchlings in our study did not disperse until spring.…”

Section: Discussionmentioning

confidence: 99%

“…However, the hatchlings in our study did not disperse until spring. While Altobelli et al (2021) did not detail specific causes of autumn mortality, they also documented transmitter signal loss (45%) where causation could not be determined.…”

Section: Discussionmentioning

confidence: 99%

“…Young Ornate Box Turtles cannot effectively retreat into their soft shell for protection until their fourth year (Norris and Zweifel, 1950; Caldwell and Collins, 1981); Redder et al (2006) found that adult survival rate was achieved after the shell hardens at approximately 8–10 yr of age (our Subadult stage). Multiple studies have documented neonate turtle predation by small predators during dispersal (e.g., Draud et al, 2004; Janzen et al, 2007; Jones and Sievert, 2012; Altobelli et al, 2021). Short-Tailed Shrews are not listed as potential predators of Ornate Box Turtles by Dodd (2001).…”

Section: Discussionmentioning

confidence: 99%

“…However, the battery of the small transmitters was probably the major factor because we had fewer incidents of signal loss in hatchlings when we activated transmitters immediately before attachment, applied a more effective adhesive, and replaced transmitters prior to expected battery failure. Altobelli et al (2021) found that only 50% of Eastern Box Turtle (Terrapene carolina) hatchlings in the Lower Peninsula of Michigan survived from autumn nest dispersal to overwintering. However, the hatchlings in our study did not disperse until spring.…”

Section: Discussionmentioning

confidence: 99%

“…Janzen et al, 2007;Jones and Sievert, 2012;Altobelli et al, 2021). Short-Tailed Shrews are not listed as potential predators of Ornate Box Turtles by…”

mentioning

confidence: 99%

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Do Home Range, Movement Patterns, and Habitat Use of Ornate Box Turtles (Terrapene ornata ornata) Differ Among Age Classes?

Bernstein

Fendrich

McCollum

2023

Journal of Herpetology

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Ornate Box Turtles (Terrapene ornata ornata) exist in few large, reproductive populations in Iowa. Little is known about the home range, movements, and habitat use of neonates and young turtles or how movements change during maturation. We tracked four age classes of turtles from 2011 to 2016 and calculated weekly minimum convex polygon home range, every-other-day linear distance moved, habitat, microhabitat, and vegetation cover. We divided the active season into three blocks of time based on established patterns of behavior in Ornate Box Turtles. Age was the only significant factor explaining larger home ranges in older turtles during May and June–July, but there were no significant differences during August–September. However, linear distance moved significantly increased with age during all time periods. Turtles were mainly found in prairie or shrub–prairie habitats, but older turtles were more likely to move farther away from the nesting/breeding/overwintering area. While often on the surface, all age groups were found primarily under vegetation, shrubs, or trees that provided >95% vegetation cover. We suggest that habitat management for this state-threatened species consider the diverse habitats and area needed by all age classes.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

“…Janzen et al, 2007;Jones and Sievert, 2012;Altobelli et al, 2021). Short-Tailed Shrews are not listed as potential predators of Ornate Box Turtles by…”

mentioning

confidence: 99%

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Do Home Range, Movement Patterns, and Habitat Use of Ornate Box Turtles (Terrapene ornata ornata) Differ Among Age Classes?

Bernstein

Fendrich

McCollum

2023

Journal of Herpetology

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Direct and indirect estimates of dispersal support strong juvenile philopatry and male‐biased dispersal in a freshwater turtle species (Emys orbicularis)

Fay,

Ficheux,

Béchet

et al. 2023

Freshwater Biology

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Dispersal has major impacts on population dynamics, population genetics and evolution, and also is critical for population management and conservation. Dispersal is frequently sex‐ and age‐specific, but current knowledge is strongly taxonomically biased toward birds and mammals. Here, we provide estimates of dispersal in a threatened freshwater turtle species, the European pond turtle Emys orbicularis. Based on 15 years of capture‐mark‐recapture (CMR) monitoring and DNA samples from 194 individuals, we quantified both demographic and genetic dispersal between three sites separated by 1.5–3.5 km. We also investigated the effect of age and sex on dispersal. Direct (CMR) and indirect (genetic) approaches provided consistent results, showing that the studied sites are connected with a flow of about one to three dozen migrants per generation. Dispersal was both age‐ and sex‐biased in this species, with frequent dispersal of adult males and a strong philopatry of juveniles (of both sexes) and adult females. The network of canals and marshes allow effective dispersal to occur among the three study sites despite the relatively large distance separating them (≤3.5 km). The strong philopatry of juveniles contrasts with the frequently higher dispersal rate in young birds and mammals and shows the relevance of investigating dispersal in various taxonomic groups. Our results provide useful information for the conservation of European pond turtle populations.

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The thermal sensitivity of growth and survival in a wild reptile with temperature‐dependent sex determination

Leivesley,

Rollinson

2024

Oikos

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The Charnov‐Bull hypothesis is the leading explanation for the evolution of environmental sex determination (ESD), which includes temperature‐dependent sex determination (TSD), the most common form of ESD. Charnov‐Bull predicts a sex‐by‐incubation temperature interaction for fitness, matching offspring sex with thermal conditions that increase parental fitness. However, there is no general explanation for how the sex‐by‐temperature interaction arises. Two competing explanations for the interaction lie in the survival to maturity hypothesis (SM) and the Trivers–Willard extension (TW). Under SM, the sex that matures later is produced under optimal incubation regimes as the late‐maturing sex accrues more mortality by maturation, while TW suggests that males are always produced under optimal incubation regimes as male mating success is more sensitive to condition (general health, vigor) than female fecundity. In a system where females mature later than males, as in the painted turtle Chrysemys picta, SM and TW generate opposite predictions for the effect of incubation temperature on juvenile survival. We incubated C. picta eggs under either female‐promoting temperatures (28 ± 3 °C) or male‐promoting temperatures (25 ± 3 °C), then released the hatchlings into their natal pond. We used a Bayesian capture–mark–recapture approach to follow their survival over two growing seasons. We found a 2% depression of biweekly survival in individuals incubated under the cooler temperature, providing subtle support for SM. Incubation treatments did not influence growth. Large‐scale field experiments such as this one will be necessary for understanding TSD evolution, and we underline general principles to execute such experiments successfully.

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First Year Survival of Hatchling Eastern Box Turtles (Terrapene carolina carolina) at Their Northern Range Limit in Michigan's Lower Peninsula

Cited by 4 publications

References 67 publications

Do Home Range, Movement Patterns, and Habitat Use of Ornate Box Turtles (Terrapene ornata ornata) Differ Among Age Classes?

Do Home Range, Movement Patterns, and Habitat Use of Ornate Box Turtles (Terrapene ornata ornata) Differ Among Age Classes?

Direct and indirect estimates of dispersal support strong juvenile philopatry and male‐biased dispersal in a freshwater turtle species (Emys orbicularis)

The thermal sensitivity of growth and survival in a wild reptile with temperature‐dependent sex determination

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