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Performance Information

BIRTH WT. EPD: Birth weight EPD is expressed in pounds and is an indicator of an individual's contribution to its progeny's weight at birth and is a comparison to breed average. Birth weight seems to affect calving ease of first calf heifers.

BIRTH WEIGHT: Birth weight is moderate in heritability and excessive birth weight may increase calving difficulty. Birth weight seems to have a positive relationship to yearling growth and each breeder must determine how much birth weight is acceptable. It seems birth weight will vary from year to year depending on winter weather and feeding rations. Length of gestation can also effect birth weight. The unborn calf is gaining about one pound per day during the last days of gestation.

WEANING WEIGHT EPD: Weaning weight EPD is expressed in pounds and is an estimate of the amount of increase or decrease in weaning weight you would expect from the progeny of a bull compared to an average bull of the breed for weaning weight. It is related to the genetic growth that a bull will pass along to his offspring.

WEANING WEIGHTS: Actual weaning weight is taken at the time of weaning. Adjusted 205 day weight is a calf's weaning weight adjusted to a standard 205 days of age. Adjusting weaning weights allows for comparison of one bull against another for weaning growth. These comparisons are only against other animals in a contemporary group in the same herd where all animals are handled the same. Since adjusted weaning weights are moderately heritable, choosing bulls with high ADJ WW can increase that trait in your herd.

YEARLING WEIGHT EPD: The yearling EPD is expressed in pounds and is an estimate of the amount of increase or decrease in yearling weight you can expect from the offspring of a bull compared to an average bull of the breed for yearling weight.

ADJUSTED 365 DAY WEIGHT: Yearling weights are adjusted to 365 day weights to make an accurate comparison of bulls. This comparison is also made against animals of a contemporary group. Since 365 day weight is considered highly heritable, choosing for the 365 day weight will increase growth. There is a direct correlation between birth weights and increased yearling weights. Accepting a little more birth weight may be necessary in increasing yearling weight.

MILK EPD: Milk EPD's are a prediction of milking ability of the bull's daughters. Milk EPD's are not related to teat size or udder shape of those females.

PELVIC AREA: Pelvic area is one of the factors which determines calving ease. Pelvic area is attained by multiplying the width times the depth of the pelvic opening. Pelvic area is highly heritable and measuring the pelvic area in  bulls should be a good indicator of pelvic size that can be expected in a bull's daughters.

SCROTAL CIRCUMFERENCE: Scrotal circumference is directly related to mobility and concentration of semen. Bulls with larger testicle size are more likely to have higher pregnancy rates. Scrotal circumference is also closely related to age at puberty in both bulls and females. Maintaining early sexual maturity in larger, fast growing cattle is among the most important performance traits and is essential to profitability. 


                                           John Mangen                    Mangen Angus Ranch         
                                           406-436-2263                    41 West Powderville Road                       
                                                                                      Broadus, Montana 59317

                                                                            Toll free 1-800-442-9545