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Tjomme van Mastrigt

@tjommem.bsky.social

PhD candidate at NIOO-KNAW and Wageningen University & Research. Interested in the impact of emerging arboviruses on wild bird populations.

Posts Replies Media

Reposted by Tjomme van Mastrigt

Eldar Rakhimberdiev @eldarrak.bsky.social · 04/11/2025

Want your modelling to save birds? PhD with me at UvA (Amsterdam): build spatial integrated population model for black-tailed godwits with world-class dataset and strong team here & @birdeyes-gfn.bsky.social/RUG). werkenbij.uva.nl/en/vacancies... Apply by 1 Dec 2025: #Ecology #Bayesian #Conservation

a couple of individually marked godwits. Photo by J. Seenstra

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Reposted by Tjomme van Mastrigt

Emmanuelle Münger @emmanuellemunger.bsky.social · 25/08/2025

🦟 New study on #Usutu and #WestNile #virus dynamics in the Netherlands out in @natcomms.nature.com! 7 years of collaborative studies in birds and mosquitoes by many in the #OneHealth PACT consortium, with Reina Sikkema & @marionkoopmans.bsky.social. → rdcu.be/eCf1f Some key findings: 1/4

rdcu.be

One Health approach uncovers emergence and dynamics of Usutu and West Nile viruses in the Netherlands

Nature Communications - Arboviruses are climate sensitive, and their global distributions are changing. Here, the authors describe results of a One Health study programme to investigate the...

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Reposted by Tjomme van Mastrigt

NL Institute of Ecology NIOO-KNAW @niooknaw.bsky.social · 28/07/2025

New publication: Parental control: ecology drives #plasticity in parental response to #offspring signals, by @tjommem.bsky.social @keesvanoers.bsky.social and others. #feedingbehaviour #foodavailability doi.org/10.1093/behe...

Figure 1 in Caro et al. (2025): "Experimental design. (A) On hatching day, nests were randomly assigned to be in a good environment (supplemented, green, Nest A), or a poor environment (unsupplemented, orange, Nest B). Supplemented nests received a daily mix of meal worms and wax worms (approximating 20% of the brood’s nutritional needs) for the week after hatching. Unsupplemented nests were visited daily to control for human disturbance. (B) After 1 week, we removed supplemented food and ranked chicks by size (weight) within natal nests. We created foster broods with chicks 1, 3, 5 and 7 from natal nest A, and chicks 2, 4, 6 from natal nest B. This accounted for potential differences in chick behavior based on their previous size rank; standardized size differences within broods; and standardized foster brood size to 7 or 6 chicks. We re-ranked chicks by size within foster nests (Nest C and Nest D). We handfed half of each foster brood to satiation in an alternating pattern by size rank; a mix of unsupplemented and supplemented chicks were fed in order to disentangle short-term and long-term need. This standardized brood-level begging intensity at the beginning of filming; ensured begging is variable enough across chicks to be a useable signal; and ensured begging intensity varied across size ranks. (C) We filmed adults feeding their fostered broods for 4.5 h, excluding first 0.5 h to ensure behavior had normalized (see Supplementary Movie 2 for an example). Fostered broods contained only unrelated chicks to ensure adult behavior was not influenced by familiarity to their own chicks. Photos by S. Caro."

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