Abstract
European starlings (Sturnus vulgaris) were fed either a low- or high-quality diet to test the effects of dietary quality on basal metabolic rate (BMR) and internal morphology. Basal metabolic rate did not differ significantly between the two dietary groups, but internal morphology differed greatly. Starlings fed the low-quality diet had heavier gastrointestinal tracts, gizzards, and livers. Starlings fed the high-quality diet had heavier breast muscles. Starlings on the low-quality diet maintained mass, while starlings on the high-quality diet gained mass. Dry matter digestibility and energy digestibility were lower for starlings fed the low-quality diet, and their food and water intake were greater than starlings on the high-quality diet. The lack of dietary effect on BMR may be the result of increased energy expenditure of digestive organs paralleling a reduction of energy expenditure of organs and tissues not related to digestion (i.e., skeletal muscle). This trade-off in energy allocation among organs suggests a mechanism by which organisms may alter BMR in response to a change in seasonal variation in food availability.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 189-197 |
| Number of pages | 9 |
| Journal | Physiological and Biochemical Zoology |
| Volume | 72 |
| Issue number | 2 |
| DOIs | |
| State | Published - Dec 1 1999 |
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ASJC Scopus subject areas
- Physiology
- Biochemistry
- Animal Science and Zoology
Cite this
Effects of dietary quality on basal metabolic rate and internal morphology of European starlings (Sturnus vulgaris). / Geluso, Keith; Hayes, Jack P.
In: Physiological and Biochemical Zoology, Vol. 72, No. 2, 01.12.1999, p. 189-197.Research output: Contribution to journal › Article
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TY - JOUR
T1 - Effects of dietary quality on basal metabolic rate and internal morphology of European starlings (Sturnus vulgaris)
AU - Geluso, Keith
AU - Hayes, Jack P.
PY - 1999/12/1
Y1 - 1999/12/1
N2 - European starlings (Sturnus vulgaris) were fed either a low- or high-quality diet to test the effects of dietary quality on basal metabolic rate (BMR) and internal morphology. Basal metabolic rate did not differ significantly between the two dietary groups, but internal morphology differed greatly. Starlings fed the low-quality diet had heavier gastrointestinal tracts, gizzards, and livers. Starlings fed the high-quality diet had heavier breast muscles. Starlings on the low-quality diet maintained mass, while starlings on the high-quality diet gained mass. Dry matter digestibility and energy digestibility were lower for starlings fed the low-quality diet, and their food and water intake were greater than starlings on the high-quality diet. The lack of dietary effect on BMR may be the result of increased energy expenditure of digestive organs paralleling a reduction of energy expenditure of organs and tissues not related to digestion (i.e., skeletal muscle). This trade-off in energy allocation among organs suggests a mechanism by which organisms may alter BMR in response to a change in seasonal variation in food availability.
AB - European starlings (Sturnus vulgaris) were fed either a low- or high-quality diet to test the effects of dietary quality on basal metabolic rate (BMR) and internal morphology. Basal metabolic rate did not differ significantly between the two dietary groups, but internal morphology differed greatly. Starlings fed the low-quality diet had heavier gastrointestinal tracts, gizzards, and livers. Starlings fed the high-quality diet had heavier breast muscles. Starlings on the low-quality diet maintained mass, while starlings on the high-quality diet gained mass. Dry matter digestibility and energy digestibility were lower for starlings fed the low-quality diet, and their food and water intake were greater than starlings on the high-quality diet. The lack of dietary effect on BMR may be the result of increased energy expenditure of digestive organs paralleling a reduction of energy expenditure of organs and tissues not related to digestion (i.e., skeletal muscle). This trade-off in energy allocation among organs suggests a mechanism by which organisms may alter BMR in response to a change in seasonal variation in food availability.
UR - http://www.scopus.com/inward/record.url?scp=0033360885&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0033360885&partnerID=8YFLogxK
U2 - 10.1086/316654
DO - 10.1086/316654
M3 - Article
C2 - 10068622
AN - SCOPUS:0033360885
VL - 72
SP - 189
EP - 197
JO - Physiological and Biochemical Zoology
JF - Physiological and Biochemical Zoology
SN - 1522-2152
IS - 2
ER -