Diet selection by chicks

Rovee‐Collier, Carolyn; Hayne, Harlene; Collier, George; Griesler, Pamela C.; Rovee, G B

doi:10.1002/(sici)1098-2302(199604)29:3<241::aid-dev4>3.0.co;2-r

Cited by 7 publications

(5 citation statements)

References 44 publications

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“…Because the daily food intake of all groups was the same, we also attribute the poorer growth of chicks in Group to their greater expenditure of calories 6 hrs on wheel-running. The latter conclusion is consistent with prior reports that a higher level of running-wheel activity is associated with poorer growth in both chicks (Balentine et al, 1981;Rovee-Collier et al, 1993;Rovee-Collier et al, 1996) and rats (Collier, 1969(Collier, , 1970.…”

Section: Resultssupporting

confidence: 93%

“…In Experiment 2, however, activity levels declined over days, F(15, 540) ϭ 9.51, p Ͻ .0001 (see Figure 8). In fact, the latter is the typical devel-opmental pattern (Hayne et al, 1986;Rovee-Collier et al, 1982;Rovee-Collier et al, 1991;Rovee-Collier et al, 1993;Rovee-Collier et al, 1996). In retrospect, we attribute the stability of running in Experiment 1 to the hourly entry of the experimenter to remove and/or replace food cups and to the fact that chicks in all groups ran in anticipation of their meals (see Figure 3) which were scheduled to occur more frequently than in Experiment 2.…”

Section: -Hrmentioning

confidence: 92%

“…Chicks were simultaneously offered separate food cups containing a high-carbohydrate (8% protein) and a high-protein (45% protein) diet. These diets have been used in all previous diet-selection and behavioral studies with chicks in this laboratory (Hayne et al, 1986;Kaufman, Collier, & Squibb;Rovee-Collier et al, 1982;Rovee-Collier, Collier, Egert, & Jackson, 1993;Rovee-Collier et al, 1997;Rovee-Collier, Hayne, Collier, Griesler, & Rovee, 1996;Rovee-Collier, Kupersmidt, O'Brien, Collier, & Tepper, 1991). Diets were approximately isocaloric and contained balanced vitamins and minerals but differed in their protein-to-carbohydrate ratio (see Table 1).…”

Section: Dietsmentioning

confidence: 99%

“…In addition, the high-protein diet, if eaten exclusively, yields lower-than-normal body temperatures, suppresses running-wheel activity, and increases water intake. In contrast, the low-protein diet, if eaten exclusively, yields higher-than-normal body temperatures and high levels of running (Balentine, Douglas, & Squibb, 1981;Collier & Squibb, 1967;Rovee-Collier et al, 1996). In addition, body temperatures of animals who are either deprived or on restricted diets are usually lower than normal (Forsum, Hillman, & Nesheim, 1981;Rashotte, Henderson, & Phillips, 1989;Rovee-Collier et al, 1982;Rovee-Collier et al, 1993, Rovee-Collier et al, 1996.…”

Section: Dietsmentioning

confidence: 99%

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The timing of food availability affects growth in chicks

1998

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Three experiments challenged the ability of domestic chicks to grow normally by differentially restricting when and for how long food was available. In Experiments 1 and 2, food was available for six 1‐hr, three 2‐hr, two 3‐hr, or one 6‐hr (a.m., p.m.) periods/day over the first 3 posthatch weeks. Control groups received continuous access to food. In Experiment 3, different amounts of light surrounded the 6‐hr feeding period. In Experiments 2 and 3, chicks composed their own diets from separate sources high in protein or carbohydrate. Except for the single 6‐hr meal preceding dark, large meals at other times of day impaired growth—primarily because chicks consumed insufficient dietary protein and ate less earlier in the light phase. We conclude that both the amount eaten and the proportion of the diet consumed as protein at given times of the day are phylogenetically acquired strategies that fit the omnivorous, diurnal chicken to its niche, independent of its momentary requirements, and appear early in development. © 1998 John Wiley & Sons, Inc. Dev Psychobiol 32: 183–197, 1998

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Section: Resultssupporting

confidence: 93%

Section: -Hrmentioning

confidence: 92%

Section: Dietsmentioning

confidence: 99%

Section: Dietsmentioning

confidence: 99%

See 2 more Smart Citations

The timing of food availability affects growth in chicks

1998

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“…In a classic study, 15 children were given a choice of 30 healthy foods each day from weaning until age 6, and their self-selected diets were nutritionally sound over long time scales (Davis 1928(Davis , 1939. More recent studies support this principle: At liberty among healthy choices, organisms select diets that meet their nutritional needs (Frankel et al 2012;Johnson et al 1991;Rovee-Collier et al 1996). Montessori aims to provide an array of healthy choices for intellectual and socioemotional growth from which children can select what is needed for their current moment in development.…”

Section: Self-determinationmentioning

confidence: 99%

Shunned and Admired: Montessori, Self-Determination, and a Case for Radical School Reform

Lillard

2019

Educ Psychol Rev

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School reform is an important national and international concern. The Montessori alternative school system is unique in that it is well-aligned with the science of healthy development and learning, has strong social-emotional and academic outcomes, is virtually unchanged in over a century, can be applied across all the school years, and still attracts considerable attention and allegiance-yet it remains Bon the margins^(Whitescarver and Cossentino Teachers College Record, 110, 2571-2600, 2008) of the bulwark educational system, as often shunned as admired. Why does Montessori persist (and increasingly in the public sector) and why does it elicit such sharply contrasting reactions? This article reviews several reasons why it is admired, such as evidence of Montessori's effectiveness, its alignment with educational psychology research, and its broad scope. The points of research alignment are presented as natural corollaries of Montessori's central premise: independence, or self-determination. After discussing these extrinsic and intrinsic reasons why Montessori is admired, the article concludes with speculation as to why it is also shunned-namely its incommensurability with conventional education culture and what might be a consequence: frequent poor implementation. The incommensurability of evidence-based alternatives with the conventional system is also posed as a reason for radical school reform. Keywords Education. Alternative schooling. Human development. Self-determination My vision of the future is no longer of people taking exams and proceeding from [one level of school to the next], but of individuals passing from one stage of independence to a higher [one], by means of their own activity [and…] will, which constitutes the inner evolution of the individual. (Montessori 1948a, p. xv)

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