More than a decade of monitoring population abundance in three anuran species from Central Serbia
2022
Аутори:
Jovanović, BogdanĆorović, Jelena
Ilić, Marija
Crnobrnja-Isailović, Jelka
Остала ауторства
Crnobrnja-Isailović, JelkaVukov, Tanja
Vučić, Tijana
Tomović, Ljiljana
Тип документа:
Конференцијски прилог (Објављена верзија)
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© 2022 Institute for Biological Research "Siniša Stanković" – National Institute of Republic of Serbia, University of Belgrade
Метаподаци
Приказ свих података о документуАпстракт:
Amphibians are the most endangered of all vertebrates; therefore, maintaining a
long-term monitoring of local populations is important even for the widespread
species. Neglecting the research on common species might result in many silent local
extinctions. The negative effects of environmental changes can be reflected in a
reduction of a population’s size, with a strongest impact on species that reproduce
during early spring (like Bufo bufo – common toad and Rana dalmatina – agile frog),
although other species (Pelophylax esculentus complex – green frogs) could also be
affected. Decrease in size of common toad populations was recorded in parts of Great
Britain, the Czech Republic, Italy and Switzerland, while agile frog populations have
usually been reported as stable. Declines in population size of some green frog
populations were reported in parts of Poland and Turkey.
These three taxa were monitored from 2011 to 2021 in a permanent pond near
village Zuce, at the southern outskirts of Belgrade (Serbia). Population size of the
common toad seems to be declining over the years (Kendall’s Tau = -0.60; Z = -2.57; p
= 0.01). Number of females was constantly low, which raises concern. Fluctuation in
population size was registered for both agile frogs and green frogs, with 2021 being
the best year as most egg clutches and individuals were spotted. Density dependence
effect on population size was confirmed for the agile frog (Kendall’s Tau = -0.56; Z = -
2.09; p = 0.04). Within a year, the activity of green frogs was increasing over the months
until May/June and then it was decreasing until December. The largest number of
individuals was spotted in May. There was a slight inversion in that decline in
September, when maximum and minimum numbers of individuals were higher than in
August. There were no correlations among the species regarding population size
fluctuations.
Финансирање / пројекти:
- Министарство науке, технолошког развоја и иновација Републике Србије, институционално финансирање - 200007 (Универзитет у Београду, Институт за биолошка истраживања 'Синиша Станковић') (RS-MESTD-inst-2020-200007)
У:
- Crnobrnja-Isailović J, Vukov T, Vučić T, Tomović Lj, editors. Program and Book of Abstracts: the 21st European Congress of Herpetology; 2022 Sep 5-9; Belgrade, Serbia. Belgrade: Institute for Biological Research "Siniša Stanković"– National Institute of Republic of Serbia, University of Belgrade; 2022. p. 220.