Seasonal Reproduction

Question 1

Environmental factors that influence reproductive activity

Answer 1

Photoperiod, rainfall, nutrition, pheromones, contaminants

Question 2

Intrinsic factor that influence reproductive activity

Answer 2

Genotype

Question 3

Photoperiod

Answer 3

The duration of an organism’s daily exposure to light (day length). Different amounts of light can induce or inhibit reproduction.

Question 4

Lower body condition score

Answer 4

Increases pregnancy loss

Question 5

Macropods

Answer 5

Kangaroos and wallabies

Question 6

Long day breeders

Answer 6

Breed when days get longer (summer/spring).

Question 7

Short day breeders

Answer 7

Breed when days get shorter (winter/fall)

Question 8

Seasonal breeders

Answer 8

Generally breed ar the same time each year. Photoperiod.

Question 9

Opportunistic breeder

Answer 9

Responds quickly and breed when an ideal opportunity presents itself.

Question 10

Seasonal species

Answer 10

Sheep, goat, horse, rabbit, +/- cat

Question 11

Non-seasonal breeders

Answer 11

dog, cow, pig, guinea pig, rodent

Question 12

What gland in the brain does light affect

Answer 12

The Pineal Gland

Question 13

What does the pineal gland secrete

Answer 13

Melatonin

Question 14

What is melatonin secreted from?

Answer 14

Amino acid tryptophan