Are Autonomously Motivated University Instructors More Autonomy-Supportive Teachers?

We extended the research on autonomy-supportive teaching to universities and examined the relationships between autonomous motivation to teach and autonomy-supportive teaching. Autonomously motivated university instructors were more autonomy-supportive instructors. The freedom to make pedagogical decisions was negatively correlated with external motivation towards teaching. Participants indicated that large class sizes, high teaching loads, publication pressures, and a culture that undervalues effective undergraduate teaching undermined both student learning and their feelings of autonomy. Together these results presents a picture of a subset of university instructors who remained autonomously motivated to teach, irrespective of barriers they experienced from university administrators or policies

Are Autonomously Motivated University Instructors More Autonomy-Supportive Teachers?

We extended the research on autonomy-supportive teaching to universities and examined the relationships between autonomous motivation to teach and autonomy-supportive teaching. Autonomously motivated university instructors were more autonomy-supportive instructors. The freedom to make pedagogical decisions was negatively correlated with external motivation towards teaching. Participants indicated that large class sizes, high teaching loads, publication pressures, and a culture that undervalues effective undergraduate teaching undermined both student learning and their feelings of autonomy. Together these results presents a picture of a subset of university instructors who remained autonomously motivated to teach, irrespective of barriers they experienced from university administrators or policies

Spontaneously broken color

The vacuum of QCD is characterized by the Higgs mechanism. Color is ``spontaneously broken'' by a quark-antiquark condensate in the octet representation. The massive gluons carry integer electric charges and are identified with the vector mesons. The fermionic excitations consist of the low mass baryon octet and a singlet. The interactions between these particles and the light pseudoscalar octet are largely determined by chiral symmetry and a nonlinear local symmetry. A consistent phenomenological picture of strong interactions at long distances arises from a simple effective action.Comment: 67 page

Assessing bird exclusion effects in a wetland crossed by a railway (Sado estuary, Portugal)

L. Borda-de-Água et al. (eds.), Railway Ecology, Chapter 11, p. 179-195Linear transportation infrastructures may displace wildlife from nearby areas that otherwise would provide adequate habitat conditions. This exclusion effect has been documented in roads, but much less is known about railways. Here we evaluated the potential exclusion effect on birds of a railway crossing a wetland of international importance (Sado Estuary, Portugal). We selected 22 sectors representative of locally available wetland habitats (salt pans, rice paddy fields, and intertidal mudflats); of each, half were located either close to (0–500 m) or far from (500–1500 m) the railway line. Water birds were counted in each sector between December 2012 and October 2015, during two months per season (spring, summer, winter, and autumn) and year, at both low and high tide. We recorded 46 species, of which the most abundant (>70% of individuals) were black-headed gull, greater flamingo, northern shoveler, black-tailed godwit, and lesser black-backed gull. Peak abundances were found in autumn and winter. There was no significant variation between sectors close to and far from the railway in species richness, total abundance, and abundance of the most common species. Some species tended to be most abundant either close to or far from the railway albeit not significantly so but this often varied across the tidal and annual cycles. Overall, our study did not find noticeable exclusion effects of this railway on wetland birds, with spatial variation in abundances probably reflecting habitat selection and daily movement patterns. Information is needed on other study systems to assess the generality of our findingsinfo:eu-repo/semantics/publishedVersio

Successful breeding predicts divorce in plovers

When individuals breed more than once, parents are faced with the choice of whether to re-mate with their old partner or divorce and select a new mate. Evolutionary theory predicts that, following successful reproduction with a given partner, that partner should be retained for future reproduction. However, recent work in a polygamous bird, has instead indicated that successful parents divorced more often than failed breeders (Halimubieke et al. in Ecol Evol 9:10734–10745, 2019), because one parent can benefit by mating with a new partner and reproducing shortly after divorce. Here we investigate whether successful breeding predicts divorce using data from 14 well-monitored populations of plovers (Charadrius spp.). We show that successful nesting leads to divorce, whereas nest failure leads to retention of the mate for follow-up breeding. Plovers that divorced their partners and simultaneously deserted their broods produced more offspring within a season than parents that retained their mate. Our work provides a counterpoint to theoretical expectations that divorce is triggered by low reproductive success, and supports adaptive explanations of divorce as a strategy to improve individual reproductive success. In addition, we show that temperature may modulate these costs and benefits, and contribute to dynamic variation in patterns of divorce across plover breeding systems

Multiple effects of weather on the starvation and predation risk trade-off in choice of feeding location in redshanks

1. Animals should choose the feeding habitat that allows them to meet their energy requirements while minimizing predation risk, but as weather becomes more severe, animals may choose riskier, but more profitable, feeding habitats.2. At the Tyninghame estuary, Scotland, Redshanks (Tringa totanus) chose to feed on either a mudflat or saltmarsh. Energy intake rates were 23% higher and thermoregulatory costs were 40% lower on the saltmarsh, but predation risk from sparrowhawks (Accipiter nisus) was 21 times higher.3. The investigation tested whether the riskier habitat was chosen only when weather conditions were such that individuals were unable to meet their energy requirements in the safer habitat, and how any additional effects of weather affected this choice.4. When starvation risk increased on the mudflat, more Redshanks selected the saltmarsh where energy budgets alone accounted for 22% of the variation in habitat choice. Temperature and wind may have had smaller additional, independent effects that were probably related to their effects on vigilance behaviour and predator detection.5. The results show that weather may be crucial in determining habitat choice through its direct effects on starvation and predation risk, and the importance of considering a wide range of weather conditions when determining habitat requirements.</p