Lecture 3b - Animal growth

Question 1

What are the two generations in meat productions?

Answer 1

Parent generation

Slaughter generation

Question 2

What are the parent generation used for?

Answer 2

Reproduction

Question 3

What are the slaughter development used for?

Answer 3

Growth and development

Question 4

In the parent generation, reproductive success is determined by:

Answer 4

Time between births
Number of offspring born
Age at first breeding
Length of reproductive lifetime

Question 5

In the slaughter generation, what is growth determined by?

Answer 5

Rate of gain

Question 6

In the slaughter generation what develops?

Answer 6

Parts of the body

Tissues

Question 7

How does tissue mass increase?

Answer 7

Cell multiplication

Cell enlargement

Question 8

What can growth be referred to as?

Answer 8

Increase in saleable liveweight until mature size

Question 9

What is development?

Answer 9

Directive coordination of various processes e.g. growth cellular differentiation, changes in body shape and form

Question 10

What is allometric growth?

Answer 10

Parts of the same organism growing at different rates

Question 11

What is the equation for allometric growth?

Answer 11

y = bx ^a

y= weight of component
x= empty body weight
a= growth coefficient

b= constant

Question 12

What are the determinants of postnatal growth?

Answer 12

genotype
gender
nutrition
hormones
climate
health

Question 13

Effects of gender on growth?

Answer 13

Females mature earlier than males

Question 14

Effects of diet on growth?

Answer 14

Growth pattern influences dietary requirements
Main driver to growth is energy intake
Dietary protein and micronutrients can have secondary influences on rates of growth and development

Question 15

What indicates good or poor meat quality?

Answer 15

Nutritional value
Hygiene
Sensory (eating) properties
Technological quality

Question 16

Meat production systems

Answer 16

Meat as primary product (e.g. pig production)
Meat from dual purpose systems
Meat as secondary product
Grazing and grassland systems
Mixed use of grassland and housing
Landless- full use of yards and housing