Long-term within pond variation of egg deposition sites in the agile frog, <Emphasis Type="Italic">Rana dalmatina</Emphasis> |
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Authors: | Tibor Hartel |
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Institution: | (1) Mihai Eminescu Trust, Str. Cojocarilor 10, 545400 Sighişoara, Romania |
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Abstract: | This study presents long-term fluctuation, within pond distribution and mortality of egg masses in a population of Rana dalmatina reproducing in a permanent semi-natural pond in Romania. The average number of egg masses per year was 410 (SD = 114.56,
min.-max. = 265–581). The mean spawning duration (days) was 26.72 (SD = 5.53). The egg mass distribution was not constant
during the years. The long-term change in the distribution of egg masses can be related to changes in the reed cover (pond
variable) and landscape structure, i.e. the presence of the forest and a pasture between the pond and the forest. There was
a reduction in the number of dead egg masses during the study period. We suggest that the maintenance of the connectivity
with the forest and the variable amount of reed assure the main aquatic and terrestrial habitats for the agile frogs. This
will allow agile frogs to shift breeding habitats in this area according to their ecological needs and find safe terrestrial
habitats for summering and wintering. |
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Keywords: | Rana dalmatina habitat use Romania |
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