... finches Taeniopygia guttata: no effect of food quality during early development . Int. Cong. Ser.   1275 , 306 - 312 . 10.1016/j.ics.2004.08.090 Bosque , C. and Bosque , M. T. ( 1995 ). Nest predation as a selective factor in the evolution of developmental rates in altricial birds...

... for correspondence (e-mail: [email protected] ) 3 3 2008 © The Company of Biologists Limited 2008 2008 corticosterone glucocorticoids begging behavior growth altricial nestling Actions of glucocorticoids present a cost–benefit tradeoff for vertebrate young. Glucocorticoids are essential...

... in the altricial tree shrew and the precocial cui are surprisingly similar. General limb design, performance, and timing of segment and joint movements in the young animals were similar to adults in both species, even from the first steps. Touch-down of the forelimb occurred at the position below the eye in all...

...Hiroshi Tazawa; James T. Pearson; Takashi Komoro; Amos Ar ABSTRACT Previously, we have measured daily changes (developmental patterns) in embryonic heart rate ( f H ) in altricial and semi-altricial (ASA) birds (range of mean fresh egg mass approximately 1–20 g), semi-precocial seabirds (egg mass...

...James T. Pearson; Yasuhiro Noma; Hiroshi Tazawa ABSTRACT The aims of this study were to determine the patterns of development of heart rate ( f H) in altricial avian embryos and hatchlings, and then to examine how f H is regulated to meet metabolic requirements in altricial embryos. Embryonic mean...