Age and body size of Rana amurensis from northeastern China

Abstract

Age and body size are two important demographic traits that determine the life history strategies of populations and species. We measured these two parameters of Rana amurensis, at a 900 m and a 500 m altitude site in northeastern China. At the two sites, age at first reproduction was 2 years for males and 3 years for females. The maximum age of males and females at the high-altitude site was 6 and 7 years, and 5 and 7 years at the low-altitude population, respectively. Females were significantly larger than males in both populations, due to greater age in both the highand low-altitude sites. Body size of either males or females did not differ significantly between populations; only males showed increased body size at the high-altitude site when age effect was statistically controlled for. The increased cline of male body size may be attributable to delayed maturation of the sex due to a shorter growing season at high altitudes.

First detection probability, comparative analysis of ecological disparities and population dynamics of Rana pseudodalmatina (Eiselt & Schmidtler, 1971) in the Hyrcanian forests: implications for conservation planning

“…Previous studies on amphibian distribution around the world have shown that more precipitation and lower temperatures lead to species richness and increased abundance of amphibians According to our results, were larger (54.64 ± 0.53 mm) and older (7.68 ± 0.24 years) than males (48.13 ± 0.39 mm; 5.89 ± 0.39 years) in both eastern and western clades. The China Wood Frog (Rana chensinensis) the maximum observed longevity was 5 years in males and 4 years in females, respectively (Chen et al 2011). Age at sexual maturity in both sexes was 1 years (Chen et al 2011).…”

“…The China Wood Frog (Rana chensinensis) the maximum observed longevity was 5 years in males and 4 years in females, respectively (Chen et al 2011). Age at sexual maturity in both sexes was 1 years (Chen et al 2011). In the frog endemic to the Middle Taurus Mountain Range, R. holtzi, Ages ranged from 4 to 6 years for males, and from 4 to 7 for females (Guarino et al 2008).…”

Characteristics and a comparison of the gut microbiota in two frog species at the beginning and end of hibernation

“…Rana amurensis and Rana dybowskii inhabit similar habitats ( Tong et al, 2019 ). In summer, R. amurensis and R. dybowskii are spread across different areas to procure greater food resources ( Che et al, 2007 ; Chen and Lu, 2011 ). However, these two Rana species are related in terms of their trophic locations, and their primary food source is insects ( Xu et al, 2010 ).…”