Migrating birds, bats and time at Pape, Latvia

Transcription

1 Migrating birds, bats and time at Pape, Latvia Oskars Keišs & Gunārs Pētersons Institute of Biology, University of Latvia Falsterbo, Sverige, 30.VIII. 2014

2 This presentation is dedicated to Dr. Jānis Baumanis ( ) Head of the Pape Station

3 Pape, Latvia 21 02'E 56 09'N Falsterbo, Sweden

4 Lake Pape

5 Methods Birds: capture by the Rybatschy and Helgoland trap in dunes capture by mist-nets (reedbeds of the Lake Pape) visual counts [discontinued] Bats: capture by the Rybatschy and Helgoland trap in dunes counts by the ultrasound detectors visual counts [discontinued]

6 Big trap

7 Small trap since 1992

8 ...and since August 5, 2014

9 Top captures in the big traps Regulus regulus ~ Parus major ~ Aegithalos caudatus ~ Fringilla coelebs ~75000 Parus caeruleus ~70000 Parus ater ~60000 Carduelis spinus ~40000 Erithacus rubecula ~30000 Fringilla montifringilla ~10000 Parus montanus ~10000 Pipistrellus nathusii ~15000 Nyctalus noctula ~650 P.pipistrellus/pygmaeus ~400 Vespertilio murinus ~120 Myotis daybentonii ~100 Eptesicus nilssoni ~90 Myotis brandti ~70 Plecotus auritus ~70 Myotis mystacinus ~15 Barbastella barbastellus ~10 Nyctalus leisleri ~10

10 Phylloscopus inornatus Pape (Mednis, Keišs unpubl.) 30 n

11 n Long-eared Owls Asio otus captured at Pape (Grandāns, Keišs unpubl.)

12 Migration phenology of Long-eared Owls Asio otus at Pape (Grandāns, Keišs unpubl.) 100% 1 y females 1 y males 1 y+ females 1 y+ males 80% 60% 40% 20% 0% Sept.1-15 (n=45) Sept (n=328) Oct 1-15 (n=1099) Oct (n=1126) Nov 1-15 (n=747) Nov 16 - (n=153)

13 Ad./juv. ratio in Reed Warbler Acrocephalus scirpaceus at Pape in July August (Celmiņš, Briedis, Keišs unpubl.) n

14 Median departure time of Blackbird Turdus merula at Pape (Freiberga, Keišs unpubl.) 300 diena no gada sākuma

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16 Captured Pipistrellus nathusii Pape Rybatschy trap Helgoland trap 3000 n

17 Flights of Pipistrellus nathusii males (blue lines) and females (red lines) captured and banded at Pape, Latvia (max.=1905 km), Pētersons Myotis 41: Mean flight distance: ; SD=251.3 km; n= ; SD=324.2 km; n=22; p<

18 Recovery rate of three bat species banded at Pape, Latvia ( ) Species Pipistrellus nathusii Nyctalus noctula P.pipistrellus/ pygmaeus Banded, n Recovered, n % recovered Pētersons Myotis 41: 29 56

19 Stable carbon isotope ratios of exhaled breath in bats during the evening and morning peak of the autumn migration at Pape, Latvia insects body fat early late Voigt, Sörgel, Šuba, Keišs, Pētersons Proc.R.Soc. B 279:

20 The frequency of prey groups in the diet of Pipistrellus nathusii from summer colonies (Gaŗkalne, Vecpiebalga, Latvia) and migration (Pape, Latvia) z p< Krüger, Clare, Migration Summer Symondson, Keišs, - - Pētersons Mol. Ecology 23: Nematocera Anisopodidae Chironomidae Culicidae Tipulidae Brachycera Hemiptera Corixidae Cicada Aphidoidea Trichoptera Lepidoptera Ephemeroptera Neuroptera Coleoptera Hymenoptera Araneae Simuliidae Formicidae

21 Acoustic monitoring of bats How wide the migration front is? When do the bats migrate? What are the night to night variation and seasonal differences in migration activity? Weather influence

22 Acknowledgements All volunteers over all years at Pape. Founding fathers of Pape Jānis Baumanis, Jānis Baltvilks, Pēteris Blūms, Juris Lipsbergs, Agris Celmiņš Engineer of the traps Donāts Spalis Current and former students: Mārtiņš Briedis, Jurģis Šuba, Inga Freiberga, Viesturs Vintulis, Ilze Brila, Gaidis Grandāns and Ivo Dinsbergs Current partners Leibniz-Institut für Zoound Wildtierforschung, Berlin, Germany

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