2 edition of Scrotal circumference measurements as an indicator of growth in the male beef animal found in the catalog.
Scrotal circumference measurements as an indicator of growth in the male beef animal
G. J. Pirelli
Written in English
|Statement||by Gene J. Pirelli.|
|The Physical Object|
|Pagination||, 51 leaves, bound :|
|Number of Pages||51|
Scrotal circumference measurements are highly correlated with factors such as age at onset of puberty in male and female progeny (6,7), yearling weight in male progeny (18), sperm. Male reproductive traits, such as scrotal circumference and also YH and 15H, however, are easier and less expensive to measure than female reproductive traits, and greater selection intensity can.
Scrotal Circumference Scrotal circumference is an important male reproduction trait; larger scrotal circumference indicates higher semen volume (Hahn et al, ) and may be an indicator of greater carrying capacity. Seedstock producers should use Scrotal Circumference EPDs in their. Our study showed that the average scrotal circumference measurements for the performance tested beef bulls in Sweden were somewhat higher than those internationally set and that very few bulls did not reach the minimal SC requirements. However, the vast majority of beef bulls used for breeding purposes has not been subjected to any BBSE at all.
Scrotal circumference increases from 2 to 3 centimeters between one and two years of age for most breeds. Some data from Colorado State University suggests a value of centimeter per day for an adjustment factor. Scrotal Circumference and Male Fertility: There is a high correlation ) between scrotal circumference and sperm output. In. Bamualim et al., () found actual scrotal circumference was correlated to pregnancy rate ) in the year of measurement but negatively to lifetime pregnancy rate (), much lower than breeding soundness scores and, respectively). The most valuable scrotal circumference measurements are at about one year of age. SC EPD may.
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It is recommended that you measure scrotal circumference when the bulls are reaching puberty, which will vary according to seasonal conditions and the maturity pattern of your cattle. In the majority of cases, scrotal circumference should be recorded when bulls are being weighed at days. Scrotal circumference measurements, and body weights were taken at birth, midpoint of the nursing period, and immediately before castration.
Regression coefficients were calculated using preweaning growth traits as dependent on scrotal circumference. Birth scrotal circumference was significantly related only to mid-nursing weight (PAuthor: Gene J. Pirelli. Scrotal circumference measurements were used as the\ud physical indicator of testicle size in the live animal.\ud Growth traits studied were preweaning average daily gain,\ud weaning weight, feedlot gain, market weight and weight per\ud day of age.
When bull shopping, it is important to understand the meaning of a bull's scrotal l measurement is one of the best indicators of semen Your reading list – Animal.
The classical trait used in beef cattle is scrotal circumference (SC). This leads to the idea that a scrotal circumference measurement taken at the start of the testis growth exponential phase will probably be a better indicator of female puberty. large scrotal circumferences measured at a younger age are good indicators of male by: 1.
Scrotal circumference (SC) is considered a useful tool for predicting age at puberty and is performed to improve the reproductive performance in beef cattle industry. We aimed to fit several nonlinear mixed models for SC measurements of five different breeds to better predict testicular growth.
Scrotal circumference can be a valuable indicator of a bulls fertility, if its measured -calf producers have long known that scrotal circumference size matters when making sire selection decisions.
A bulls scrotal circumference is the best estimate of testes volume, and thus the amount of potential sperm-producing tissue producers can measure, says Glenn Coulter.
There are various factors involved in influencing scrotal circumference and testicular measurements such as age, breed of the bulls, and season of the year. Studies associating with body weight, testicular measurements, and scrotal circumference obtained during the different phases of growth of Tho Tho bovine species are scarce.
The records of sixty-six yearling and 2-yr-old beef bulls selected for breeding in and were used to study the relationships between body weight (BW) and gain measurements, scrotal circumference (SC) and semen characteristics in young beef bulls. The bulls belonged to four breed groups; Hereford, Beef Synthetic, Dairy Synthetic and Pee.
condition are good indicators of potential reproductive performance of range cows. A Comparison of Different Breeds for Growth Rates, Performance Traits and Scrotal Circumference in Young Beef Bulls J.
Baker, J. Kropp, E. Turman and D. Buchanan Story in Brief Performance data and testicular measurements from Hereford, Polled. Testes size as an indicator of future growth was examined in a total of 45 bull calves from spring calves born in and Scrotal circumference measurements were used as the physical indicator of testicle size in the live animal.
Growth traits studied were preweaning average daily gain, weaning weight, feedlot gain, market weight and. Scrotal Circumference Scrotal circumference is used to predict the quality and quantity of spermatozoa-producing tissue and age at puberty.
A scrotal circumference measurement of 28 to 30 cm is generally associated with onset of puberty; specifically, 52 and 97% of males are pubertal when scrotal circumference is 28 and 30 cm, respectively.
This implies that, with present methods, generic factors account for only 10% variation. It is a difficult trait to measure directly, and is generally indirectly measured with indicator traits, e.g.
age at first calving, number of calves up to a certain age and scrotum circumference. required for the study, each animal was put into a wooden box (2 2 1 m) and anaesthesia was reversed using intramuscular injection of atipamezole (mg/kg bwt; Antisedan, Orion Pharma, Orion, Finland) (Kreeger & Arnemo ), which was given 45min after immobilisation.
Testicular measurements Scrotal circumference of each individual was measured. Effects of ring castration with local anesthesia and analgesia in Holstein calves at 3 months of age on welfare indicators.
Journal of Animal Scie scrotal circumference, growth, scrotal measurements and growth in response to Burdizzo castration. Scrotal circumference is favourably related to both fertility in the male and its female offspring.
Therefore it is of interest to evaluate the relationship of scrotal circumference, as indicator of reproduction, with other linear body measurements and weights. Hereford breeders are taking body measurements and weights at different ages and. Bulls measured at one year of age should have a scrotal circumference of at least 32 centimeters, and preferably 34 to 36 cm.
To measure a bull, confine him in a chute, and from behind him take hold of the neck of the scrotum, and gently force testes down into the scrotum, putting the measuring tape snugly around the largest circumference.
Recording scrotal circumference measurements. Scrotal circumference measurements should be recorded by pulling the testes firmly down into the lower part of the scrotum and placing a measuring tape around the widest point (as per the photo below). Scrotal circumference measurements can be taken by anyone.
based on indicator traits as scrotal circumference (SC) for economically relevant traits a ﬀ ecting fertility of beef cows (BIF, ), however, SC it is di ﬃ cult and expensive trait to.
EBLEX BRP better returns from rams: Conducting a ram MOT - getting ready for tupping - Duration: AHDB Beef & L views. In studying the growth curve of the scrotal circumference from the weaning to 16 months old in beef cattle, measurements were taken in animals from 20 farms belonging to the Nucleus of.The means obtained for scrotal circumference increased with age, showing greater testicular development between the ages of 9 and 12 months, with a reduction from there on in the growth rate with advancing age (Table 1).The mean values observed for measures of scrotal circumference in this study were similar to those described by Gianlorenço et al., Silveira et al.
and Boligon et al.Although the literature disproved scrotal circumference as a pathway for improving female fertility, according to Spangler, it is still the best indicator of male fertility. “While it may not be directly related to female fertility, certainly there have been examples in the literature where increasing scrotal circumference does have a desired.