Abstract
AbstractThe body condition of a snake species provides important physiological, morphological, and ecological information that elucidates its habits, life cycle, and competitive relationships. We measured the body size and condition of the wild Gloydius ussuriensis population in South Korea from 2018 to 2022, analyzed the degree of intraspecific niche overlap, and identified the geographic and climatic factors affecting their body condition. We found that the females were longer than the males. The body condition index (BCI) of G. ussuriensis differed depending on sex and season; the BCI of the females and males was highest in August and October, respectively. Environmental factors related to altitude and temperature affected the body condition of G. ussuriensis; BCI increased as the mean annual temperature and winter temperature increased; however, it increased when the annual temperature range decreased. The mean Pinaka index was 0.96, indicating a high degree of niche overlap; however, the niche overlap among the neonates was less than that among the adults and juveniles. To elucidate the causes of niche overlap and mechanisms behind the intraspecific competition among G. ussuriensis individuals, the habitat and utilization of food resources at different development stages of G. ussuriensis should be further investigated.
Funder
National Institute of Biological Resources
Publisher
Springer Science and Business Media LLC
Reference74 articles.
1. Pearson, D., Shine, R. & Williams, A. Geographic variation in sexual size dimorphism within a single snake species (Morelia spilota, Pythonidae). Oecologia 131, 418–426 (2002).
2. Sivan, J., Kam, M., Hadad, S., Degen, A. A. & Rosenstrauch, A. Body size and seasonal body condition in two small coexisting desert snake species, the Saharan sand viper (Cerastes vipera) and the crowned leafnose (Lytorhynchus diadema). J. Arid Environ. 114, 8–13 (2015).
3. Frank, K. & Dudas, G. Body size and seasonal condition of Caspian whip snakes, Dolichophis caspius (Gmelin, 1789), in southwestern Hungary. Herpetozoa 30, 131–138 (2018).
4. Glaudas, X., Rice, S. E., Clark, R. W. & Alexander, G. J. Male energy reserves, mate-searching activities, and reproductive success: alternative resource use strategies in a presumed capital breeder. Oecologia 194, 415–425 (2020).
5. Shine, R. Why do larger snakes eat larger prey items?. Funct. Ecol. 5, 493–502 (1991).