Accuracy of estimation of testis weight from in situ testis measures in ram lambs

2018) Influences of dietary selenium, zinc and their combination on semen characteristics and testosterone concentration in mature rams during breeding seasonABSTRACT This study was conducted to determine the effect of dietary supplementation of organic zinc (Availa®Zn100) and selenium (Availa®Se1000) on semen characteristics, testes measures and serum testosterone concentration. Twenty Sanjabi rams (50.01 ± 5.6 kg) were randomly divided into four equal groups, given the basal diet as control (C) or supplemented with 0.3 mg/kg Se (SE) or 40 mg/kg Zn (ZN) or 40 mg/kg Zn plus 0.3 mg/kg Se (ZS) for 120 days experiment (from July to November). The semen samples and blood samples were collected every 3 weeks and scrotal circumference was measured every 15 days. The results indicated that scrotal circumference and testosterone concentrations did not differ due to treatment (P > .05). In contrast, semen characteristics were affected by ZS supplementation. The sperm density and total sperm number increased (P < .05) in ZS group. In addition, the progressive sperm motility was higher in ZS (P < .05) than those of SE and C groups. It is concluded that ZS treatment can improve semen characteristics, which may result in overall improvement in reproductive performance of treated Sanjabi rams during the breeding season. ARTICLE HISTORY

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“…Scrotal circumference was measured by using a tape measured at the widest of the paired testes at a 15-day interval (Notter et al 1981).…”

Section: Testis Measurementmentioning

confidence: 99%

Influences of dietary selenium, zinc and their combination on semen characteristics and testosterone concentration in mature rams during breeding season

Ghorbani

Moeini

Souri

et al. 2017

Journal of Applied Animal Research

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“…The existence of a correlation between SC and reproductive characteristics in ovines, confirmed by Land [21], and later by Notter et al [22], may be considered when choosing the breeding animal. This assertion corroborates the findings of Moraes et al [23], when evaluating the fertility of ovines of the Corriedale breed, aged from 12 to 24 months, and using a SC greater than 29 cm as the reference.…”

Section: Discussionmentioning

confidence: 90%

Lack of Relationship between Testicular Echotexture and Seminal Characteristics in Adult Texel Rams

Urt¹,

Bakarji²,

Faria³

et al. 2018

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The objective of this study was to determine the minimum representative area to evaluate testicular echotexture parenchyma and to identify the correlations between the intensity of pixels of the testicular parenchyma and the fibrosis score with the physical and morphological characteristics of the ejaculate of Texel rams. The study used 88 Texel rams, aged between 10 and 12 months, and reared in a semi-extensive system. The animals underwent breeding soundness evaluation (BSE) and ultrasound of the testicles. The images were transferred to a computer where they were defined in areas of 400, 1600, 3600, and 6400 mm 2 , after which the average intensity of the pixels of each image of the testicular regions was evaluated. A testicular fibrosis score was assigned in order to quantify the frequency of fibrotic lesions. In relation to the intensity of pixels of the predetermined regions, only the area of 400 mm 2 presented a difference (P < 0.05), with the area of 1600 mm 2 being the smallest area that best represented the testicular parenchyma. There were no correlations between the intensity of pixels of the testicular parenchyma and the fibrosis score with the physical and morphological characteristics of the ejaculate of the rams.

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“…Emsen (2005) showed that sheep with relatively higher growth rate can considerably improve the early pubertal development of ram and undernutrition (only grazing), during 6 to 9 months of age, decreased the body growth and scrotal circumference. Although scrotal circumference is considered as one of the best indicators of sexual development in rams (Notter et al, 1981), more reliable parameters of sexual development in growing rams include both scrotal circumference and testicular volume, as the testicular tissue occupies small proportion of scrotal volume. In the present study, scrotal circumference of the ram lambs did not increase with feeding milk replacer and rumen inert fat regime.…”

Section: Discussionmentioning

confidence: 99%

Effect of milk replacer and rumen inert fat on growth and reproduction of Malpura ram lambs

Kumar

Bhatt

Karim

et al. 2014

Animal

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The objective of this study was to assess the effects of milk replacer and rumen inert fat on growth, testicular development, puberty, semen production and sperm motion characteristics of ram lambs reared under intensive management in semi-arid climatic conditions. Seven-day-old male lambs of Malpura breed (n = 20) were divided equally into two groups. Up to weaning, the lambs in G1 group (control) were fed concentrate, green khejri (Prosopis cineraria) leaves and cowpea (Vigna unguiculata) hay along with suckling of dams, whereas lambs in G2 group were fed reconstituted milk at 17 g/lamb per day for the 1st week and at 34 g/lamb per day from 2nd week in addition to the feed inputs given in G1. During post weaning, lambs in the G1 group were given control concentrate, whereas in G2 the control concentrate supplemented with 40 g rumen inert fat per kg of feed was offered along with dry pala (Zizyphus nummularia) and ardu (Ailanthus excelsa) leaves. BWs of lambs were recorded weekly up to 6 months of age. Ram lambs of both the groups were trained for semen collection at a weekly interval from the age of 5 months and simultaneously testicular measurements were recorded fortnightly. The feeding of milk replacer and rumen inert fat had positive ( P < 0.05) effects on BW, testicular length, testicular volume, semen volume, sperm concentration, mass motility, % motility, % rapid, medium or slow motile spermatozoa. However, no significant effect was observed on testicular breadth, scrotal circumference, age of puberty, sperm velocities and other CASA-derived parameters. The results of this study indicate that higher plane of nutrition in the form of milk-replacer feeding during preweaning and rumen inert fat-supplemented feed during the postweaning period to growing ram lambs enhances their growth, testicular development and semen quality.

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Accuracy of estimation of testis weight from in situ testis measures in ram lambs

Cited by 35 publications

References 8 publications

Influences of dietary selenium, zinc and their combination on semen characteristics and testosterone concentration in mature rams during breeding season

Influences of dietary selenium, zinc and their combination on semen characteristics and testosterone concentration in mature rams during breeding season

Lack of Relationship between Testicular Echotexture and Seminal Characteristics in Adult Texel Rams

Effect of milk replacer and rumen inert fat on growth and reproduction of Malpura ram lambs

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