ANSC 2120 Lecture Notes - Lecture 31: Birth Weight, Allometry, Cellular Respiration

• School: Cornell University
• Department: Animal Science
• Course: ANSC 2120
• Professor: Debbie Cherney

Document Summary

Animal growth is the progressive net accretion of nutrients and (cid:1) (cid:1) their metabolites, which begins at conception and continues as long as nutrient intake exceeds requirements for oxidative metabolism and regeneration of existing tissues (cid:1) (cid:1) (cid:1) puberty. Increases rapidly after birth; continues to increase during. Rate gradually slows down after puberty until maturity is (cid:1) (cid:1) reached. Birth weight is <5% mature body weight in most species, but almost all tissues are fuller differentiated and functional by birth. Puberty occurs at <50% mature weight in most species. Mature size is reaches when linear growth ceases: closure of long bone epiphyses. Rate of growth and time to maturity is totally dependent on nutrition. Growth in farm animals is usually represented as average daily gain (adg) Ex: lamb growth trial required repeated measurement of body weight over a given time period. Two basic approaches: anatomical dissection of major tissues components.