Jaap van Schaik
@JaapvSchaik
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this account is dormant, find me @jaapvschaik.bsky.social
Joined August 2017
Absolute bucket list moment! Seeing our work on BatNet spectacularly illustrated by the folks at @RSECJournal 😍🦇
BatNet: a deep learning-based tool for automated bat species identification from camera trap images Watch our short animated video based on the paper by @GabiKrivek et al. https://t.co/ZdbGGpkcFO
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Implications: if a hibernaculum is disturbed or destroyed, our observations suggest most Natt/Dau bats do not have a backup plan in place! So mitigation measures that compensate for the loss of a site with the creation/upgrade of another should be approached with extreme caution.
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What’s more, at one of the sites, three entrances were simultaneously monitored, and even within-site it appears most bats stuck to the one entrance they knew, and rarely explored the others in the immediate vicinity.
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To explore whether bats were leaving for unmonitored sites, we also compared the disappearance rates (tagged individuals that were never sighted again) to published mortality estimates for both species. tl;dr: nope!
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When movements did occur, they almost exclusively occurred in autumn, and juveniles moved more than adults. In fact, the annual movement rate of adult bats was <1% in both species. Never change a winning strategy, it seems.
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In this study, the entrances of three hibernacula were monitored with RFID-readers, and the movements of over 2500 marked bats were tracked over 8 years. In total, only 17 of the 1081 Daubenton’s bats and 59 of the 1425 Natterer’s bats were ever recorded at a second hibernaculum
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New paper! 🦇❄️💤 How often do bats scout and switch hibernacula? For Natterer’s and Daubenton’s bats it turns out, almost never. https://t.co/43Ldgb751u Based on the brilliant long-term monitoring being led by Frauke Meier at @BatResearch_HGW, and published in @AnimalConserv
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Biodiversiy is declining, yet we have limited knowledge about how that affects human well-being. My work linking bats, insecticide use, and human infant health is out today in Science ( https://t.co/gNIbWRdqEj), and tells a complex story about how those are connected.
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Check out this gorgeous infographic summarising the highlights Gabi's PhD thesis. Looking forward to all the new adventures and results we can achieve with this 🦇 monitoring tool!
🦇📸Wondering how we can use cutting-edge techniques to automatically monitor #biodiversity? Let’s peek into the world of light barriers, #cameratraps and #deeplearning to explore the intricate world of #bats and gain invaluable insights into their behavior at hibernation sites.
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The deadlines for these 2 #PhDposition's has been extended to July 20th! As before, happy to answer any questions about the positions or the group :) official advert here:
Announcing 2 new #PhD positions in our 🦇lab! Monitoring bat population trends is hard. In a new project, BatTrend, we will explore both new methods and optimize established ones to help improve monitoring guidelines. Info about the 2 positions in the 🧵 below. RTs appreciated!
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|| NEW RESEARCH || Heat over heritability: Increasing body size in response to global warming is not stabilized by genetic effects in Bechstein's bats 📄 https://t.co/X1xGwbOx1q
@BatResearch_HGW
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links to the advertisements in English: https://t.co/Ax2XBfHkfZ
https://t.co/bE2smfUCvN
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Application deadline is soon: 10th of July. Links to the adverts are in German, but will be updated with the English text soon. Feel free to get in touch if you have any questions!
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Overall, BatTrend will be composed of modules looking at both summer and winter monitoring (counts, marking, light barriers, long-term passive acoustics, eDNA), as well as continue the work of https://t.co/Ukq0LAvkmn to compile and provide these data to all.
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The other will explore two new monitoring methods: long-term passive #acoustics, and #eDNA (together with @Helmholtz_HIOH). This project has it all! Fieldwork, labwork and coding/stats. With support from a great group of advisors of course. https://t.co/sNHxHv7niW
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One position will use high-resolution long-term monitoring data to develop monitoring guidelines for forest-dwelling #bats. They’ll also spend the summers collecting the data (so lots of fun in the ☀️/ 🌧️). https://t.co/t6Nb8BSUOa
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Announcing 2 new #PhD positions in our 🦇lab! Monitoring bat population trends is hard. In a new project, BatTrend, we will explore both new methods and optimize established ones to help improve monitoring guidelines. Info about the 2 positions in the 🧵 below. RTs appreciated!
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She did it! It's been a wild ride, but oh so worth it. Congrats Dr. Krivek.
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And as a little teaser, in sister species Polychromophilus murinus, which infects vespertilionid bats, the pattern is very different! More on that soon, in another great collaboration with @SchaerJuliane
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When we look at how the observed genotypes fit into the known diversity of the species, they’re all over the haplotype network! This suggests there’s a lot of transmission of Polychromophilus across the range of miniopterids from Europe, Africa and Asia.
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