Effect of omega-3 fatty acids and thyme essence on carcass traits of Mahabadi kids

Tuesday, July 22, 2014
Exhibit Hall AB (Kansas City Convention Center)
Amin Hozhabri , University of Tehran, Tehran, Iran
Aboulfazl Zali , University of Tehran, Tehran, Iran
Mahdi Ganjkhanlou , University of Tehran, Tehran, Iran
Ali Emami , University of Birjand, Birjand, Iran
Amir Akbari-Afjani , University of Zanjan, Zanjan, Iran
Mehdi Dehghan-Banadaky , University of Tehran, Tehran, Iran
Abstract Text:

This study was carried out to determine the effects of supplementing long-chain fatty acids of fish oil and thyme on carcass traits in Mahabadi goat kids. For this aim, twenty-eight Mahabadi goat kids (average initial BW of 17/8 ± 2/8 kg, 4-5mo) were randomly assigned to four treatments: 1) control (basal diet), 2) 0.2% thyme essence, 3) 2% fish oil and 4) 2% fish oil +0.2% thyme essence.Animals were kept in individual pens with self-mangers for 94 d. Diet was formulated to met the requirements recommended by NRC with forage (alfalfa and corn silage): concentrate ratio of 30:70 in TMR form. Kids were weighed after 10 d of adaptation and at 21 d intervals after feed restriction and slaughtered at the end of the trial by Iranian traditional procedure  . The area of the 9th, 10th, 11th, 12th and 13th ribes together with the adjoined section of spinal column was used to estimate the amount of bone-free meat, fat and bone in the carcass. The meat, fat and bone were weighed after separation and the bone-free meat component stored at −20 °C for the chemical analysis. Data were analized by GLM procedure of SAS 9.1 and tukey test (P≤ 0.05). Addition of 2% fish oil increased fat depth over 12th rib (P< 0.05). Dressing percentage, eye muscle area, carcass length, liver and kidney weight, abdominal and kidney fat were not affected by treatments(P>0.05). Percentages or weights ribs dissected muscle, fat and bone, and percentages of wholesale cuts of the carcass were not affected by fish oil and thyme essence(P> 0.05). The results of this experiment indicate that supplementation of goat kid diet with fish oil and thyme did not influence carcass traits but, fish oil  increased back fat thickness.


Thyme essence
Fish oil
Carcass traits