Experiment

 

Treatment groups

Short-term increase in LH within 4h

E2 Surge
(>2.0 pg/mL between 4 and 52h)

LH Surge (between 4 and 52h)

Increased P4 (>0.5 ng/mL within 7 days)

Short Luteal Phase

 

Oestrus

 

One

Control (n=14)

10

3

2

6

3

1a

Supplemented (n=14)

10

4

3

5

3

4b

 

Two

 

Control

Low BCS (n=15)

6a

2a

1a

1a

1a,b

0a

Med BCS (n=15)

13b

7a

5a

6b

1a,b

6b

 

Supplemented

Low BCS (n=15)

15b

3b

3a

6a,b

4a

1a

Med BCS (n=15)

15b

6a

4a

5b

0b

5b

Table 1: The number of ewes responding to the “ram effect” in control ewes and in ewes supplemented with 500g of maize/soya per day for five days immediately before the introduction of rams. Experiment two involved the additional factor of body condition score (BCS) at two levels; low (median BCS 1.75) and medium (median BCS 2.25). Within columns and within experiments values with different superscripts are significantly different (P<0.05)