Aging Wood Frogs (Rana sylvatica) by Skeletochronology

Bastien, Heloise; Leclair, Raymond

doi:10.2307/1564868

Cited by 51 publications

(38 citation statements)

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“…2A) Maximum larval survival (r tmax ) 0.53 this study ( Fig. 2A) Metamorph survival (r m ) 0.208 Rothermel and Semlitsch (2006); edge habitat, B. Rothermel (personal communication) Juvenile survival (r j ) 0.167 Rothermel and Semlitsch (2006); edge habitat; B. Rothermel (personal communication) Maturation probability (P) 0.325 (;0.15-0.50) Wilbur (1977), Flageole and Leclair (1992) Berven (1990), Bastien and Leclair (1992), Sagor et al (1998) (2002) either A. maculatum or R. sylvatica. Reproduction in both species was influenced by pool location (forest or roadside) more so than conductivity, signaling that other factors related to roads, such as avoidance of roads, direct mortality of adults on roads, or habitat quality, as demonstrated in other studies (e.g., Skelly et al 2002, Van Buskirk 2005) may be limiting occurrence or reproduction in these pools.…”

Section: Sylvatica) or Causing Mortality In Aquatic Invertebrates (Amentioning

confidence: 65%

Impacts of Road Deicing Salt on the Demography of Vernal Pool-Breeding Amphibians

Karraker

Gibbs

Vonesh

2008

Ecological Applications

275

187

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Deicing agents, primarily road salt, are applied to roads in 26 states in the United States and in a number of European countries, yet the scale of impacts of road salt on aquatic organisms remains largely under-studied. The issue is germane to amphibian conservation because both adult and larval amphibians are known to be particularly sensitive to changes in their osmolar environments. In this study, we combined survey, experimental, and demographic modeling approaches to evaluate the possible effects of road salt on two common vernal-pond-breeding amphibian species, the spotted salamander (Ambystoma maculatum) and the wood frog (Rana sylvatica). We found that in the Adirondack Mountain Region of New York (USA), road salt traveled up to 172 m from the highway into wetlands. Surveys showed that egg mass densities of spotted salamanders (A. maculatum) and wood frogs (R. sylvatica) were two times higher in forest pools than roadside pools, but this pattern was better explained by road proximity than by increased salinity. Experiments demonstrated that embryonic and larval survival were reduced at moderate (500 muS) and high conductivities (3000 muS) in A. maculatum and at high conductivities in R. sylvatica. Demographic models suggest that such egg and larval stage effects of salt may have important impacts on populations near roads, particularly in the case of A. maculatum, for which salt exposure may lead to local extinction. For both species, the effect of road salt was dependent upon the strength of larval density dependence and declined rapidly with distance from the roadside, with the greatest negative effects being limited to within 50 m. Based on this evidence, we argue that efforts to protect local populations of A. maculatum and R. sylvatica in roadside wetlands should, in part, be aimed at reducing application of road salt near wetlands with high conductivity levels.

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Section: Sylvatica) or Causing Mortality In Aquatic Invertebrates (Amentioning

confidence: 65%

Impacts of Road Deicing Salt on the Demography of Vernal Pool-Breeding Amphibians

Karraker

Gibbs

Vonesh

2008

Ecological Applications

275

187

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“…However, there is no positive relationship between age and body size in some species, or this relationship may vary depending on the sex. For example, positive correlation was reported for only females in Bufo bufo (Höglund and Säterberg, 1989), while this correlation was only reported for males in R. pipiens (Leclair and Castanet, 1987), Pseudacris cruifer (Lykens and Forester, 1987), and Amietophrynus pardalis (formerly Bufo pardalis) (Bastien and Leclair, 1992). Diaz-Paniagua and Mateo (1999) did not find any significant relationship between age and body size in five populations of L. boscai.…”

Section: Discussionmentioning

confidence: 92%

Body size and age in three populations of the northern banded newt Ommatotriton ophryticus (Berthold, 1846) from Turkey

Özcan¹,

Üzüm²

2015

Turk J Zool

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We measured body size (snout-vent length, SVL) for three populations of Ommatotriton ophryticus newts in Turkey and estimated age using the skeletochronological method. Age was determined by counting the lines of arrested growth in cross-sections taken from phalanges. SVL was similar among populations and ranged between 58.41 and 85.78 mm in males and 50.33 and 71.56 mm in females. Males were significantly larger than females in all populations. Age at maturity was 4-6 years in males and 5-6 years in females. The average age of males and females did not differ significantly. Maximum age ranged from 9 to 12 years in males and from 9 to 11 years in females. Positive correlation was found between SVL and age for both sexes in all populations. A significant difference was observed among populations in terms of both age and body size (6-, 7-, and 8-year-old age classes). The demographic traits of the studied populations are the result of the interaction of multiple factors, including altitude, geographical location, and ecological factors.

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“…When direct age determination is not possible, skeletochronology is a very useful tool and has been widely used to evaluate ages of amphibians and reptiles (Castanet, 1985;Bastien and Leclair, 1992;Caetano and Leclair, 1996;Waye, 1999;Lima et al, 2001). The present study is part of a conservation programme for the populations and habitats of Lacerta schreiberi in Portugal that aimed to gather information on the biology and ecology of this species.…”

Section: Death-feigning Inmentioning

confidence: 99%