Scrotal circumference measurements in purebred Dorset, Hampshire and Suffolk lamb and yearling rams

Ley, William B.; Sprecher, D.J.; Lessard, Pierre; Thatcher, Craig D.; Pelzer, Kevin D.; Umberger, Steven Henry

doi:10.1016/0093-691x(90)90561-7

Cited by 5 publications

(3 citation statements)

References 9 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Clinical examination of genitalia was performed from the rear, with the ram in the standing position and restrained by two assistants. Scrotal circumference was measured using a tape at the widest point with constant tension (Ley et al, 1990).…”

Section: Clinical and Ultrasonographic Examinationsmentioning

confidence: 99%

Ultrasonographic Examination and Measurements of Testes, Epididymis and Accessory Glands at Different Growth Stages of Chios Rams

Ali

Abdel-Razek

Fahmy

2021

ASD

View full text Add to dashboard Cite

Background: Testes, epididymis and accessory glands measurements should be mandatory as an imminent for male selection. This study aimed at defining the ultrasonographic characteristics and measurements of testes, epididymis and accessory glands at different growth stages in Chios rams.Methods: Sixteen rams were assigned by age class into: group A (pre-pubertal, n=3), group B (pubertal, n=5) and group C (mature, n=8). Scrotal circumference (SC) was measured using a tape. Scrotal contents were examined using a B-mode ultrasound. Testicular breadth (TB), thicknesses of tunica albuginea (TA) and mediastinum (MS) and the largest dimension of epididymal tail (EpT) were estimated. Trans-rectal ultrasound was carried out to estimate the echogenicity and diameter of bulbourethral gland (BUG), height of pars dessiminata of prostate (PDP) and maximum breadth of seminal gland (SG).Result: SC increased curvilinear with age. Testicular echogenicity increased with age. Thickness of TA did not differ with age. MS could not detect in pre-pubertal rams, reached maximum thickness with puberty and became relatively thinner by maturity. EpT evidently enlarged with puberty. BUG, PDP and SG exhibited moderate echogenicity. They reached their greatest size with sexual maturity. SC estimated by tape and TB estimated by US correlated with most of the ultrasonographic measurements of the epididymis and accessory glands.

show abstract

Section: Clinical and Ultrasonographic Examinationsmentioning

confidence: 99%

Ultrasonographic Examination and Measurements of Testes, Epididymis and Accessory Glands at Different Growth Stages of Chios Rams

Ali

Abdel-Razek

Fahmy

2021

ASD

View full text Add to dashboard Cite

show abstract

“…Use of winter-born ram lambs during the following fall-breeding season is advantageous in that it allows for more rapid genetic progress and reduces the number of rams to be maintained for breeding. Most ram lambs have not obtained full testicular development at the onset of the fall breeding season (Ley et al, 1990). This limits breeding capacity and may be especially evident when ram lambs are used in single-sire breeding groups and with extended ram-to-ewe ratios (Dinsmore and Lewis, 1994).…”

Section: Published December 8 2014mentioning

confidence: 99%

Effects of immunization against two inhibin antigens on daily sperm production and hormone concentrations in ram lambs1

Voge

Wheaton

2007

Journal of Animal Science

View full text Add to dashboard Cite

The gonadal hormone inhibin regulates daily sperm production (DSP) indirectly through negative feedback control of FSH secretion and may also affect DSP via direct actions within the testis. Studies attempting to increase DSP through the immunization against inhibin have yielded equivocal results. The current study compared 2 inhibin antigens for effects on DSP and hormone secretion. Hampshire ram lambs (BW = 42 +/- 2 kg; age = 113 +/- 3 d) were assigned randomly to 3 groups: 1) control (n = 4); 2) alpha-peptide conjugate (PTC, n = 6); and 3) alpha-subunit (SUB, n = 6). Antigen PTC consisted of an alpha-inhibin, N-terminal, 25-amino acid peptide conjugated to ovalbumin. Antigen SUB was the complete inhibin alpha-subunit. Lambs were immunized on d 0 (June 19, 2006), 18, 38, and 63. Body weight was recorded on immunization days and scrotal circumference on d 63. Blood samples were collected on d 0, 7, 14, 18, 28, 35, 38, 49, 56, 63, and 70. Rams were slaughtered on d 71. Testes were weighed, and parenchyma was obtained for DSP determination. Plasma alpha-inhibin antibody titer and LH, FSH, and testosterone concentrations were measured. alpha-Inhibin antibody titer was first detectable on d 14 in both PTC- and SUB-immunized ram lambs and generally increased thereafter. Mean DSP per gram of testis (DSP/g) was increased (P < 0.01) 26% in PTC- and SUB-immunized ram lambs over that in control ram lambs. Total DSP per ram lamb and testes weight did not differ among the 3 treatment groups. Variation in DSP per ram lamb and testes weight were greater (P = 0.05) in PTC- and SUB-immunized ram lambs than in control ram lambs. Plasma FSH concentrations were similar in PTC- and SUB-immunized ram lambs. Immunization against either alpha-inhibin antigen did not alter LH, testosterone, BW, or scrotal circumference. Findings indicate that 1) the 2 alpha-inhibin antigens increase DSP/g to similar extents; 2) alpha-inhibin antibody may act at least in part through an intratesticular mechanism because DSP/g was increased in some animals without concomitant increases in FSH; and 3) immunization against alpha-inhibin may affect testes weight by actions independent of those that regulate DSP/g.

show abstract

“…There are significant factors (genotype, rearing systems, season, age, body weight, etc.) influencing the development of testicular characteristics (Ley et al, 1990;Aral and Tekin, 1996;Aygün et al, 1999 andGündoğan et al, 2002). Many workers showed that, within factors, age and body weight had the significant impact on testicular traits (Salhab et al, 2001;Özdemir and Altın, 2002;Yılmaz and Aygün, 2002).…”

Section: Introductionmentioning

confidence: 99%

Study of Some Testicular Dimensions and Their Relationship to Body Weight in Karadi Ram Lambs

2016

Assiut Veterinary Medical Journal

View full text Add to dashboard Cite

This study was carried out to measure the development of some testicular traits and to investigate the relevance between testicular parameters with body growth in growing Karadi ram lambs. Twenty-seven single born Karadi ram lambs apparently clinical healthy, aged six months, were used. The Testicular measurements including: length, diameter, and circumference of their testes and body weight were recorded once monthly. The testicular measurement (cm) and body weight (kg) were subjected to linear (Y= a+bX) where, Y means the testicular measurement and X is the body weight, a and b are constants due to the intercept and the regression coefficient, respectively. The results revealed that there was a gradual and linear increase in testicular dimensions from six to eight months of age. The average scrotal circumference (SC) showed significant (P≤0.05) increase from 10.66±0.74 to 17.88±1.19 cm at 6 and eight months of age, respectively. Corresponding changes in the average testicular volume were found to be 14.31±3.66, 77.66±23.54 and 104.23±23.92 cm 3 at 6, 7 and eight months of age, respectively. All measurements of testis, live weight, were positively and significantly correlated with each other. While a significant positive correlation were found at seven and eight months of age between all testicular measurements. These results showed that testicular measurements, such us scrotal circumference, can be used as criteria for early selection of ram lambs to be utilize in breeding especially for young ages. Due to the strong correlation between body weight and testicular measurements, body measurements can be used to select Karadi ram lambs for breeding programs. However, further studies are needed to determine the relationship between these subjective morphological criteria and the actual fertility and semen quality in Karadi rams.

show abstract

Scrotal circumference measurements in purebred Dorset, Hampshire and Suffolk lamb and yearling rams

Cited by 5 publications

References 9 publications

Ultrasonographic Examination and Measurements of Testes, Epididymis and Accessory Glands at Different Growth Stages of Chios Rams

Ultrasonographic Examination and Measurements of Testes, Epididymis and Accessory Glands at Different Growth Stages of Chios Rams

Effects of immunization against two inhibin antigens on daily sperm production and hormone concentrations in ram lambs1

Study of Some Testicular Dimensions and Their Relationship to Body Weight in Karadi Ram Lambs

Contact Info

Product

Resources

About