• Publications
  • Influence
Phenotypic flexibility and the evolution of organismal design
Evolutionary biologists often use phenotypic differences between species and between individuals to gain an understanding of organismal design. The focus of much recent attention has been onExpand
  • 781
  • 41
Rapid population decline in red knots: fitness consequences of decreased refuelling rates and late arrival in Delaware Bay
Most populations of migrant shorebirds around the world are in serious decline, suggesting that vital condition–dependent rates such as fecundity and annual survival are being affected globally. AExpand
  • 379
  • 23
Extreme endurance flights by landbirds crossing the Pacific Ocean: ecological corridor rather than barrier?
Mountain ranges, deserts, ice fields and oceans generally act as barriers to the movement of land-dependent animals, often profoundly shaping migration routes. We used satellite telemetry to trackExpand
  • 323
  • 20
Pay-offs and penalties of competing migratory schedules
We relate variation in the timing of arrival by migrating birds breeding at northerly latitudes to individual differences in the prior accumulation of energy stores. Balancing starvation risks earlyExpand
  • 222
  • 15
Rapid changes in the size of different functional organ and muscle groups during refueling in a long-distance migrating shorebird.
The adaptive value of size changes in different organ and muscle groups was studied in red knots (Calidris canutus islandica) in relation to their migration. Birds were sampled on five occasions: atExpand
  • 263
  • 14
Why Seychelles Warblers fail to recolonize nearby islands : unwilling or unable to fly there?
The Seychelles Warbler Acrocephalus sechellensis is a rare island endemic which, from 1920 to 1988, occurred only on Cousin Island (29 ha) in the Seychelles. Despite the saturated nature of thisExpand
  • 85
  • 14
Avian pectoral muscle size rapidly tracks body mass changes during flight, fasting and fuelling.
We used ultrasonic imaging to monitor short-term changes in the pectoral muscle size of captive red knots Calidris canutus. Pectoral muscle thickness changed rapidly and consistently in parallel withExpand
  • 159
  • 13
Contrasting extreme long-distance migration patterns in bar-tailed godwits Limosa lapponica
Migrating birds make the longest non-stop endurance flights in the animal kingdom. Satellite technology is now providing direct evidence on the lengths and durations of these flights and associatedExpand
  • 116
  • 13
Rapid reversible changes in organ size as a component of adaptive behaviour.
Organ structures and correlated metabolic features (e.g. metabolic rate) have often taken as fixed attributes of fully grown individual vertebrates. When measurements of these attributes becameExpand
  • 520
  • 12