title

Demographic structure and long-term population dynamics of Muroidea in the Askania-Nova Biosphere Reserve

author(s)

Igor Polischuk (orcid: 0000-0001-5648-4911)

affiliation

E. F. Falz-Fein Askania-Nova Biosphere Reserve, NAAS (Askania-Nova, Ukraine)

bibliography

Theriologia Ukrainica. 2024. Vol. 27: 119–137 (in press).

DOI

language

Ukrainian, with English summary, titles of tables, captures to figs

abstract

The article presents the results of long-term monitoring of muroid rodent populations in the protected steppe of the Askania-Nova Biosphere Reserve (Ukraine), which lasted from 1981 to 2020, i.e., for almost 30 years. Detailed descriptions of the population dynamics of representatives of two families are presented: the family Cricetidae (four of seven species present in the region) and the family Muridae (three of four species present in the region). The descriptions include data on Cricetulus migratorius, Lagurus lagurus, Microtus socialis, and Microtus levis from the family Cricetidae, and Sylvaemus witherbyi, Mus musculus, and Mus spicilegus from the family Muridae. Detailed data series on the numbers of each species in their main types of habitats (primarily the typical steppe), on the age-sex structure of their populations, distribution of females in reproductive groups, etc. are presented. For some species, the age structure was also analysed by size parameters (primarily by measurements of mandibles from pellets of the barn owl). It was shown that all these species form stable populations, which is ensured by their short life cycle and several reproductive periods per year. A high level of presence was shown for the steppe-specific Cricetulus migratorius, as Lagurus lagurus was recorded almost exclusively in pellets and was virtually absent in trappings, but since 1998 this species has disappeared in pellets. The species Microtus levis was recorded irregularly at the study site with intervals of 10–11 years. In Microtus socialis, population declines, when animals were not trapped at all, lasted for less than two years, and this species occasionally showed population outbreaks. Muridae species are also highly abundant, with Mus musculus inhabiting all biotopes, Mus spicilegus avoiding urban areas, and Sylvaemus witherbyi, though widespread, being rarely found in populated areas. Their populations are characterised by significant fluctuations, ranging from prolonged declines to sharp peaks. Intensive reproduction of all Muridae species occurred in spring, and then pregnant females were found throughout the summer and until mid-autumn, so populations of all Muridae species were periodically replenished with young individuals, which compensated for the short life cycle of these animals.

keywords

muroid rodents, long-term monitoring, population dynamics, steppe fauna

references

Alikina, E. V. 1959. Effect of water dietary regime on ovogenesis and spermatogenesis of the common and social voles. Zoologicheskii zhurnal, 38 (4): 610–625. [Russian]
Emelyanov, I. G. 1988. Breeding peculiarities of the social vole in the steppe zone of Ukraine. In: Studying the Theriofauna of Ukraine, Its Rational Use and Protection. Naukova Dumka, Kyiv, 68–76. [Russian]
Heptner, V. G., L. G. Morozova-Turova, V. I. Tsalkin. 1950. Harmful and Useful Mammals of the Areas of Field Protection Plantations. Moscow State University Publishing House, Moscow, 1–452. [Russian]
Kotenkova, E. V., N. N. Meshkova, M. I. Shutova. 1989. On Rats And Mice. Nauka, Moscow, 1–176. [Russian]
Kucheruk, V. V. 1952. Quantitative survey of the most impor­tant species of harmful rodents and shrews. In: Methods of Survey and Geographical Distribution of Terrestrial Vertebrates. USSR Publ. House, Moscow, 9–45. [Russian]
Lialiukhina, S. I. 2003. Population structure of closely related species of the genus Mus in natural and transformed ecosystems. In: Biodiversity and the Role of Zoocoenosis in Natural and Anthropogenic Ecosystems. DNU, Dnipro, 224–225. [Russian]
Mezhzherin, V. A., I. G. Emelyanov, O. A. Mykhalevych. 1991. Integrated Approaches to the Study of Small Mammal Populations. Naukova Dumka, Kyiv, 1–204. [Russian]
Mezhzherin, S. V. 1993. Forest mice of the genus Sylvaemus Ognev et Vorobiev, 1924 of the fauna of Ukraine. In: Mammals of Ukraine. Naukova Dumka, Kyiv, 55–63. [Russian]
Polishchuk, I. K. 2005. Some aspects of the impact of the social vole Microtus socialis Pallas, 1773 on the vegetation of the Askania-Nova Reserve Steppe. News of the Askania-Nova Biosphere Reserve, 7: 89–101. [Ukrainian]
Polishchuk, I. K. 2009. Experience in Assessing the Population of Small Mammals in the Biosphere Reserve Askania-Nova by the Owl Pellets’ Method. BZ ‘Askania-Nova’, Askania-Nova, 1–54. [Russian]
Polishchuk, I. 2012. The hillock mouse Mus spicilegus (Muridae, Rodentia) in Ascania Nova and Kherson region. Proceedings of the Theriological School, 11: 71–76. [Russian] http://doi.org/10.15407/ptt2012.11.071
Polishchuk, I. K. 2023. Species identification, spatial structure and population dynamics of white-toothed shrews (Mammalia, Soricidae) in Biosphere Reserve Askania-Nova. News of the Askania-Nova Biosphere Reserve, 25: 75–80. [Ukrainian]
Polyakov, I. Y. 1954. Towards a theory of small rodent abundance prediction. Zhurnal of General Biology, 15 (2): 91–108. [Russian]
Tsvetkova, A. A., M. L. Oparin. 2013. The steppe lemming (Lagurus lagurus Pallas, 1778) in the steppes of the Saratov region. Povolzhski Ecological Journal, No. 2: 231–236. [Russian]
Yasynetska, N. I., I. K. Polischuk. 1998. Taxonomic status and some features of the ecology of the grey vole in the Askania Nova Biosphere Reserve. In: Studies on the Diversity of the Animal World. Astroprint, Odessa, 130–132. (Series: Proc. Zool. Mus. Odessa Univ.; Vol. 3). [Russian]
Zagorodniuk, I. V., S. V. Teslenko. 1986. Sibling-species of the Microtus arvalis superspecies in the Ukraine. Communication I. Occurrence of Microtus subarvalis. Vestnik zoologii, (3): 34–40. [Russian] http://terioshkola.org.ua/library/zag/zag-1986-(microtus-subarvalis-UA).pdf
Zagorodniuk, I. V., I. G. Emelyanov. 2012. Taxonomy and nomenclature of mammals of Ukraine. Proceedings of the National Museum of Natural History, 10: 5–30. [Ukrainian] URL
Zagorodniuk, I. 2020a. Close species of rodent superfamily Muroidei in the fauna of Ukraine: taxonomy, biogeography, diagnostics, and ecomorphology. Theriologia Ukrainica, 19: 3–26. [Ukrainian] http://doi.org/10.15407/TU1903
Zagorodniuk, I. 2020b. Distribution and variation of wood mice of the Sylvaemus microps & uralensis group in Eastern Europe: fragmentation and clines. Theriologia Ukrainica, 20: 91–104. http://doi.org/10.15407/TU2012