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001-es BibID:BIBFORM084244
Első szerző:Møller, Anders P.
Cím:Risk-taking and the evolution of mechanisms for rapid escape from predators / Anders Pape Møller, Vágási Csongor István, Pap Péter László
Dátum:2013
ISSN:1010-061X
Megjegyzések:Flight initiation distance (FID) is the distance at which an individual animal takes flight when approached by a human. This behavioural measure of risk-taking reflects the risk of being captured by real predators, and it correlates with a range of life history traits, as expected if flight distance optimizes risk of predation. Given that FID provides information on risk of predation, we should expect that physiological and morphological mechanisms that facilitate flight and escape predict interspecific variation in flight distance. Haematocrit is a measure of packed red blood cell volume and as such indicates the oxygen transport ability and hence the flight muscle contracting reaction of an individual. Therefore, we predicted that species with short flight distances, that allow close proximity between a potential prey individual and a predator, would have high haematocrit. Furthermore, we predicted that species with large wing areas and hence relatively low costs of flight and species with large aspect ratios and hence high manoeuvrability would have evolved long flight speed. Consistent with these predictions, we found in a sample of 63 species of birds that species with long flight distances for their body size had low levels of haematocrit and large wing areas and aspect ratios. These findings provide evidence consistent with the evolution of risk-taking behaviour being underpinned by physiological and morphological mechanisms that facilitate escape from predators and add to our understanding of predator-prey coevolution.
Tárgyszavak:Természettudományok Biológiai tudományok idegen nyelvű folyóiratközlemény külföldi lapban
folyóiratcikk
anti-predator behaviour
aspect ratio
flight initiation distance
haematocrit
wing area
Megjelenés:Journal Of Evolutionary Biology. - 26 : 5 (2013), p. 1143-1150. -
További szerzők:Vágási Csongor István Pap Péter László (ökológus)
Pályázati támogatás:TÁMOP-4.2.1/B-09/1/KONV-2010-0007
TÁMOP
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