martedì 28 novembre 2017

# behav: large-eared bats adopting slow-flight feeding strategies

AA << compare quantitative aerodynamic measures of flight efficiency of two bat species, one large-eared (Plecotus auritus) and one small-eared (Glossophaga soricina), flying freely in a wind tunnel >>

AA << find that the body drag of both species is higher than previously assumed and that the large-eared species has a higher body drag coefficient, but also produces relatively more ear/body lift than the small-eared species >>

<< The relatively higher power of the large-eared species results in lower optimal flight speeds and [AA] findings support the notion of a trade-off between the acoustic benefits of large external ears and aerodynamic performance. The result of this trade-off would be the eco-morphological correlation in bat flight, with large-eared bats generally adopting slow-flight feeding strategies >>

Jonas Hakansson, Lasse Jakobsen, et al. Body lift, drag and power are relatively higher in large-eared than in small-eared bat species. 2017; 14 (135): 4099. doi: 10.1098/rsif.2017.0455. Oct 25, 2017.

The pros and cons of large ears. Nov 10, 2017

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