0000000000807524
AUTHOR
Mikael Von Numers
Variation in clutch size in relation to nest size in birds
© 2014 The Authors. Nests are structures built to support and protect eggs and/or offspring from predators, parasites, and adverse weather conditions. Nests are mainly constructed prior to egg laying, meaning that parent birds must make decisions about nest site choice and nest building behavior before the start of egg-laying. Parent birds should be selected to choose nest sites and to build optimally sized nests, yet our current understanding of clutch size-nest size relationships is limited to small-scale studies performed over short time periods. Here, we quantified the relationship between clutch size and nest size, using an exhaustive database of 116 slope estimates based on 17,472 nes…
Interaction of climate change with effects of conspecific and heterospecific density on reproduction
We studied the relationship between temperature and the coexistence of great tit Parus major and blue tit Cyanistes caeruleus, breeding in 75 study plots across Europe and North Africa. We expected an advance in laying date and a reduction in clutch size during warmer springs as a general response to climate warming and a delay in laying date and a reduction in clutch size during warmer winters due to density-dependent effects. As expected, as spring temperature increases laying date advances and as winter temperature increases clutch size is reduced in both species. Density of great tit affected the relationship between winter temperature and laying date in great and blue tit. Specifically…
Clutch-size variation in Western Palaearctic secondary hole-nesting passerine birds in relation to nest box design.
Møller, A.P. [et al.]
Biologian kenttäopetus yliopistoissa: yhteistyöllä uuteen nousuun
Kenttäkurssit ovat keskeinen osa biologian ja lähitieteiden opetusta yliopistoissa. Luonnossa tapahtuva opetus kehittää sekä ymmärrystä tieteenalan teoreettisista perusteista että ammatillisia käytännön taitoja. Kenttäkursseilla omat havainnot muodostuvat oppimisen perustaksi muiden oppimistapojen rinnalla. Vaikka kenttäopetuksen tarpeellisuudesta ollaan yksimielisiä, kenttäkursseja uhkaavat yliopistojen rahoituksen väheneminen ja tutkimusasemaverkoston karsiminen. Tässä kirjoituksessa pohdimme, kuinka uhkista huolimatta kenttäopetuksen määrää, laatua ja kustannustehokkuutta voidaan lisätä yliopistojen ja niiden tutkimusasemien välisellä yhteistyöllä. nonPeerReviewed
Interspecific variation in the relationship between clutch size, laying date and intensity of urbanization in four species of hole-nesting birds
Marie Vaugoyeau [et al.]