File:Tiziu - Blue-black Grassquit (Volatinia jacarina).webm
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Português: Display do Tiziu (Volatinia jacarina)Display of Blue-black Grassquit (Volatinia jacarina)Essa filmagem faz parte de um projeto científico realizado no campus da Universidade de Brasília (UnB). Apresento a baixo um breve resumo do que meu artigo com Tiziu no campus da UnB encontrou:
Biagolini-Jr. & Macedo 2020: i) os parasitas infectam mais frequentemente a região da cabeça-pescoço dos filhotes; ii) o parasitismo não diminui a sobrevivência dos filhotes; iii) o parasitismo aumenta a assimetria corporal; iv) territórios com maior oferta de alimento (quantidade de sementes de gramínea) apresentam menor risco de infeção. Biagolini-Jr. et al. 2021: duração do salto dos Tizius (fazendo display) é maior em territórios com mais alimento (sementes) e sombra. Também mostramos que após um evento de incêndio, os Tizius faziam displays em uma taxa mais baixa (isso é, davam menos saltos por minuto). A distância dos poleiros usados para exibição até a borda da mancha de vegetação ou ruas/estacionamentos, bem como a presença de um ninho ativo não influencia a duração dos saltos e taxa de exibição. Referências Biagolini-Jr. & Macedo (2020) Philornis infection in Blue‐black grassquits: impact on nestlings and risk factors involved. Journal of Avian Biology. https://doi.org/10.1111/jav.02592 Biagolini-Jr. et al. (2021) Food, shadow and fire influence a tropical bird´s display (aguardando confirmação de aceite final da revista). |
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| Source | YouTube: Tiziu - Blue-black Grassquit (Volatinia jacarina) – View/save archived versions on archive.org and archive.today |
| Author | Carlos Biagolini-Jr. |
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 09:00, 4 January 2021 | 10 s, 1,280 × 720 (2.15 MB) | Ixocactus (talk | contribs) | Imported media from https://www.youtube.com/watch?v=0_UaRNYcurk |
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