RELATIONSHIPS BETWEEN ULTRASONIC ESTIMATES OF CARCASS TRAITS AND BODY MEASUREMENTS OF JAPANESE BLACK BULL
ABSTRACT: This experiment
was done at 292 head
of Japanese black
bull at Kagoshima
and Miyazaki Prefectural Experimental
Stations Japan to
find out the
relationship between
ultrasonic estimates of
carcass traits and
body measurements as
one of criteria to select
Japanese black bull. The carcass traits
of 20 months of age were predicted
using the ultrasonic
machine. The body
dimensions were measured
at the end of
performance test (12
months of age)
and 16 months
of age. The ultrasonic evaluation
techniques were used
to estimate Musculus
Longissimus thoracis area between
6–7th and 12-13th
ribs (MLTA6-7 and
MLTA12- 13), Subcutaneous Fat
Thickness (SFT), Intermuscular
Fat Thickness (IMFT),
Rib Thickness (RT) and Marbling Score (MS). Body measurements were taken on body weight
(BW), withers height (WH), hip height (HH), body length (BL), chest girth (CG),
chest depth (CD), chest width (CW), rump length (RL), hip width (HW), thurl width
(TW) and pin bone width (PBW). Chest
girth, chest width and chest depth at
12 and 16
months of age
were showed the
highest significant and
positive correlations among the other body dimensions with ultrasonic
estimated of carcass traits at 20 months of age. The ratio of contribution to predict MLTA6-7,
MLTA12-13 and SFT at 20 months of age using the body dimensions at 12 months of
age were higher than those of 16 months of age.
Keywords: Carcass
traits, body dimension,
ultrasonic estimate, performance test, Japanese black bull,
correlation
Author: Sri Rachma Aprilita
Bugiwati
Journal Code: jpbiologigg090004
