...Agnès Lewden; Tristan Halna du Fretay; Antoine Stier ABSTRACT Once a year, penguins undergo a catastrophic moult, replacing their entire plumage during a fasting period on land or on sea-ice during which time individuals can lose 45% of their body mass. In penguins, new feather synthesis precedes...

.... To test this, we combined field manipulations, captivity measurements and geolocation data. We advanced and delayed hatching dates in pied flycatchers ( Ficedula hypoleuca ) and measured how the timing of subsequent stages (male moult and migration) were affected. There was no causal effect of manipulated...

...Neha Agarwal; Ila Mishra; Ruchi Komal; Sangeeta Rani; Vinod Kumar ABSTRACT We investigated whether circannual rhythms underlying annual testis maturation and moult cycles are independent of duration and frequency of the light period and circadian clock control in non-photoperiodic spotted munia...

...Steven J. Portugal; Susannah K. S. Thorpe; Jonathan A. Green; Julia P. Myatt; Patrick J. Butler SUMMARY Previous studies on wild moulting waterfowl have demonstrated that flight and leg muscles experience periods of hypertrophy and atrophy. This is thought to be in response to the change in use...

...Steven J. Portugal; Jonathan A. Green; Patrick J. Butler SUMMARY Many different physiological changes have been observed in wild waterfowl during the flightless stage of wing moult, including a loss of body mass. We aimed to determine whether captive barnacle geese ( Branta leucopsis )would show...

... has been introduced for the ecdysis stage of the moult cycle of these decapod crustaceans. In a remarkably similar stereotyped ecdysis sequence in both species, a passive phase of water uptake starting with bulging and rupture of thoracoabdominal exoskeletal junctions is followed by an active phase...

...Peng Chai ABSTRACT How does a hovering hummingbird compensate for the loss of flight feathers during moult when the mechanism of lift force generation by flapping wings is impaired? The flight performance of five individual ruby-throated hummingbirds with moulting primary flight feathers...

... to pHi regulation varies considerably in these preparations. Functional aspects of the pHi-regulating mechanisms in relation to ionic changes during the moulting cycle are discussed. * To whom correspondence and offprint requests should be sent. 12 1 1993 © 1993 by Company of Biologists...

...James N. Cameron ABSTRACT A series of experiments was conducted to elucidate the events immediately preceding and following moulting (ecdysis) in the blue crab, Callinectes sapidus Rathbun. The crabs gain weight (mostly water) to a level more than twice the premoult value excluding the shed...