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Use of underground hibernacula by the barbastelle (Barbastella barbastellus) outside the hibernation season

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Gottfried I.

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nr 2

EN

Barbastelles are commonly recorded in the vicinity of their wintering underground sites outside the hibernation season. It is uncertain why barbastelles visit hibernacula at this time of the year. Possible functions include feeding, resting, rearing of young, mating or stop-over sites during migration. To determine which of these functions are important I carried out observations at six large (max. 1,870 individuals) barbastelle hibernacula in SW Poland. To characterize daily and seasonal patterns of shelter use behaviour surveys were carried out at regular intervals throughout 2003 to 2005. Bats were mist-netted (73 nights) at hibernacula entrances and their age, sex and the development of caudae epidydimides in the males were determined. Their behaviour was sampled by recording (315 hours) their calls with a time-expansion bat detector in combination with direct observation and infrared fdming. Hibernacula were not used as colony roosts, foraging places, day resting places or temporary night shelters. The hibernacula served primarily as mating sites. Both females and sexually active males (with fully developed caudae epidydimides) were seen in the highest numbers in August/September, when display flights, chases of individuals, low frequency social calling and copulations were observed. As the number of bats visiting hibernacula in the mating period was much higher than that observed in winter, the underground shelters appear to be at least as important for them in the mating period as in the winter. Barbastelle hibernation sites should therefore be protected from the beginning of mating period (August) till the end of hibernation.

2

Chiropterofauna Parku Narodowego Gór Stołowych w o kresie pozazimowym

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Gottfried T. , Gottfried I. , Jakubiec J. , Zajac T. M.

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2020

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tom 25

3

Ochrona kolonii rozrodczej nocków dużych Myotis myotis w Łazach Małych w Dolinie Baryczy (Dolny Śląsk)

51%

Warchalowski M. , Gottfried T. , Gottfried I.

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nr 3

4

Schronienia wykorzystywane przez kolonie mopków zachodnich Barbastella barbastellus (Chiroptera) w okresie letnim w Polsce

51%

Gottfried I. , Gottfried T. , Bator A.

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nr 2

5

Nietoperze obszaru Natura 2000 Uroczyska Płyty Krotoszyńskiej

51%

Gottfried I. , Gottfried T. , Apoznanski G. , Wierucka K.

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nr 5

PL

Na obszarze Natura 2000 PLH300002 Uroczyska Płyty Krotoszyńskiej, w dużym kompleksie dąbrów, w latach 2011 i 2012, w okresie hibernacji i rozrodu nietoperzy badano skład gatunkowy chiropterofauny. Kontrole zimowisk, rejestracja akustyczna echolokacji i odłowy w sieci chiropterologiczne wykazały występowanie 12 gatunków nietoperzy: nocka dużego Myotis myotis, nocka Natterera M. nattereri, nocka wąsatka M. mystacinus, nocka rudego M. daubentonii, mroczka późnego Eptesicus serotinus, karlika malutkiego Pipistrellus pipistrellus, karlika drobnego P. pygmaeus, karlika większego P. nathusii, borowca wielkiego Nyctalus noctula, gacka brunatnego Plecotus auritus, gacka szarego P. austriacus oraz mopka Barbastella barbastellus. Dla siedmiu gatunków potwierdzono rozród. Gatunkiem dominującym był borowiec wielki, a drugim co do liczebności mopek.

EN

Previous studies showed that the Natura 2000 PLH300002 site Uroczyska Płyty Krotoszyńskiej is one of the largest and best preserved oak woodlands in Europe. The area could be crucial for the conservation of European bats, especially those inhabiting forests. The aim of this study was to gather data about the diversity of bat species, including data on the number of breeding ones. This was the first study evaluating the species composition and breeding sites in the area. Data were collected during both hibernation and breeding seasons in 2011 and 2012. Summer acoustic recordings, individuals captured in mist nets and winter visits to hibernation sites confirmed the presence of 12 bat species: greater mouse-eared bat Myotis myotis, Natterer’s bat M. nattereri, whiskered bat M. mystacinus, Daubenton’s bat M. daubentonii, serotine bat Eptesicus serotinus, common pipistrelle Pipistrellus pipistrellus, soprano pipistrelle P. pygmaeus, Nathusius’ pipistrelle P. nathusii, common noctule Nyctalus noctula, common long-eared bat Plecotus auritus, grey long-eared bat P. austriacus, barbastelle Barbastella barbastellus. Breeding was confirmed for seven species. The dominant species (63% of all recordings) was the common noctule (Fig. 2), while the second most common (11% of all recordings) – the barbastelle. The overall bat activity level was high, with an average of 41.9 passes (sequences of echolocation calls) per hour. Althogether 36% of all passes (n = 456) were recorded during the first hour after the sunset