... tachypnea in heat) and heat loss index (cutaneous vasomotion) in 1 week old chicken exposed to neutral (31°C), cold (26°C) and hot (36°C) conditions. Intra-medullary raphe antagonism of NMDA glutamate (AP5; 0.5, 5 mmol l −1 ) and GABA A (bicuculline; 0.05, 0.5 mmol l −1 ) receptors reduced T b of chicks...

... broods, a potential cost for maintaining a hardwired developmental trajectory in a lower quality environment. Finally, we experimentally test the effects of food supplementation on development and maturity of chicks at fledging to show that although food increases body mass early in development, it does...

... previous experiments demonstrated that visual cues were important but not essential for king penguin chicks' homing. The main objective of this study was to investigate the importance of non-visual cues, such as magnetic and acoustic cues, for chicks' orientation and short-range navigation. In a series...

... orientation in King Penguin ( Aptenodytes patagonicus )chicks that live in a large and densely populated colony. The two main objectives were to determine whether chicks displaced to a novel location away from the colony (i) can orient towards the colony and return to their crèche and (ii) rely on visual...

...Christina L. Hammond; Biggy H. Simbi; Neil C. Stickland SUMMARY The chick embryo, developing in the egg, is an ideal system in which to investigate the effects of incubation environment on the development of the embryo. We show that raising the temperature of the eggs by just one degree,from 37.5°C...

... to these compounds suggest different transduction mechanisms mediating chicken trigeminal responses to MA and CAP. Most (67.9%) of the KCl-sensitive chick TG neurons did not respond to either stimulus. Slightly more chick TG neurons responded to only MA (16.9%)relative to those responding to only CAP (10.3...

...Luca Tommasi; Richard J. Andrew SUMMARY Chicks were trained and tested to run to a dish and feed from it under one of four conditions. In three of these, the dish was covered by a light lid that the chicks readily learned to remove. The square lid (SL) had slightly protruding corners, so...

... of oxygen consumption in day 3–4 chick embryos denied cardiac output by ligation of the outflow tract and compared them with those of embryos with an intact cardiovascular system. Eye diameter, used as the index for embryonic growth, increased at a rate of approximately 4.5–5 % h −1 during the observation...

...D. Osorio; M. Vorobyev; C. D. Jones ABSTRACT The colour vision of domestic chicks ( Gallus gallus ) was investigated by training them to small food containers decorated with tilings of grey and coloured rectangles. Chicks learn to recognise the colour quickly and accurately. Chicks have four types...

.... Although most dives lasted less than 2 min during the 2 month period, 8–25 % of transmitted dives in the last 2 weeks lasted 2–4 min. These values are lower than those previously recorded in adults during foraging trips. Of the physiological variables examined during chick and juvenile development, only M...

... to maintain a uniform distribution of functional strains. We test this idea by comparing in vivo strains recorded in the tibiotarsus of white leghorn chicks during ‘intensive’ treadmill exercise (60% of maximum speed, carrying a weight equal to 20% body weight on the trunk: 60%/L) with strains that had been...

...Rebecca M. Johnston; Anne Bekoff ABSTRACT Although studies of walking have generated many of the principles for motor control, walking is but one of the many behaviors that an animal produces. This study investigates the relationships among the kinematic profiles of three behaviors in chicks...