Llamas and Alpacas

Sumar, Julio

doi:10.1002/9781119265306.ch15

Cited by 4 publications

(4 citation statements)

References 32 publications

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“…The pattern of progesterone and estradiol-17β secretion was well-documented in cattle, buffalo, sheep, goats, mares, and pigs but was still needing more clarification in camels ( Ayoub et al, 2003 ). Camels were different as a result of their induced ovulation rather than the spontaneous type in most species ( Sumar, 2000 ). Rhythmic secretion of these sex steroids had a definite correlation with sexual behavior and receptivity of the male by females in other livestock species.…”

Section: Resultsmentioning

confidence: 99%

Impact of vitamin AD3E treatment before application of controlled intra-vaginal drug releaser (CIDR) on clinical and hematologic findings, ovarian hormones and calving rates in she camels (Camelus dromedarius)

Mohamed¹,

Khalphallah²,

Ali³

et al. 2022

Open Vet J

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Background: The scope of using controlled intra-vaginal drug releasers (CIDR) in the camel industry was small relative to that of cow, sheep, and goat. Aim: The purpose of the present study was to determine the effects of intramuscular injection of AD3E (25ml/400kg; QA11CB, Merial, France) as a premedication protocol before CIDR treatment on ovarian hormones profile and calving rate in dromedary she camels (Camelus dromedarius) through measuring concentrations of progesterone (P4) and estradiol (E2) before, during and after CIDR use. Methods: The study was conducted on she-camels (Camelus dromedarius) (n=24) aged between 6-14 years. The animals were assigned into two equal groups; CIDR treated group (CIDRgr) and AD3E plus CIDR treated group (CIDR+gr). Results: Except for haemoglobin, the clinical and haematological findings showed no remarkable change either within each independent group or between CIDRgr and CIDR+gr. Serum P4 and E2 concentrations differed significantly between the first 7 days (During CIDR use) and days from 9 to 15 (After CIDR use) in dromedary camels. Serum concentrations of P4 and E2 showed significant elevation at CIDR+gr at day 0 comparing with CIDRgr. This significant increase in serum of P4 and E2 at CIDR+gr comparing to those of CIDRgr was also observed either during CIDR use (Days 3, 5 and 7) or after CIDR use (Days 9, 11, 13 and 15). During CIDR use, serum concentrations of P4 were negatively correlated with those of E2 either in CIDRgr or in CIDR+gr, however, they were positively correlated after CIDR removal either in CIDRgr or in CIDR+gr. Regarding to the calving rate, it was highest in CIDR+gr whereas CIDRgr showed the lowest one. Conclusions: It was concluded that the AD3E pretreatment protocol of she-camels before insertion of CIDR could be used successfully during the breeding season to improve fertility in she-camels whereas the serum ovarian hormones profile and calving rates were clearly changed due to pretreatment of she-camels with AD3E before CIDR insertion.

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Section: Resultsmentioning

confidence: 99%

Impact of vitamin AD3E treatment before application of controlled intra-vaginal drug releaser (CIDR) on clinical and hematologic findings, ovarian hormones and calving rates in she camels (Camelus dromedarius)

Mohamed¹,

Khalphallah²,

Ali³

et al. 2022

Open Vet J

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“…The males and females were randomly chosen to carry out the mating. The mating process between the males and females was carried out in separated pens and lasted between 10 and 15 min [9,21,22]. The pregnancy rate was analyzed after 35 days post-mating by transrectal ultrasonographic evaluation using US Draminski 4Vet ® equipment (Draminski ul, Owocowa 17, Olsztyn, Poland) with a linear transducer (frequency: 9.0 MHz; depth: 6 cm).…”

Section: Male Fertility Assessment By Evaluation Of Pregnancy Ratementioning

confidence: 99%

“…In other species, such as cattle, the estimation of sperm production is determined by the scrotal circumference [ 7 , 8 ]. Therefore, daily sperm production could be estimated externally by the testicular dimensions that determine the testicular volume [ 9 ].…”

Section: Introductionmentioning

confidence: 99%

Age-Related Differences in Testosterone Concentration and Its Relation to Testicular Biometrics, Hemodynamics, and Fertility in Alpacas (Vicugna pacos)

Pérez-Durand,

Massa-Guzmán,

Luque-Mamani

et al. 2023

Veterinary Sciences

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The goal of this study was to investigate the age-related differences in testosterone concentration and its relation to testicular biometrics, testicular blood flow, and fertility in alpacas (Vicugna pacos). Fifteen alpaca males with different ages (young (YM; ~12–14 mo.), n = 5; intermediate (IM; ~24 mo.), n = 5; and old (OM; ≥36 mo.), n = 5) were enrolled in the study. Blood samples were taken from each alpaca male and the circulating plasmatic testosterone concentration (TC; ng/mL) was determined using ELISA analysis. The testicular traits related to bio-morphometric parameters (the length (L), width (W), area (A), and volume (TV)) were assessed using B-mode ultrasonography. Pulse-wave/power Doppler ultrasonography was used to obtain the circulatory dynamic values (testicular hemodynamics) before the beginning of natural service mating. Significant differences were observed in TC among the age groups, increasing as the age of the males increased (2.47 ± 0.31, 8.45 ± 1.53, and 22.66 ± 2.15 for YM, IM, and OM, respectively; p < 0.05); however, no differences were observed regarding the testicular B-mode ultrasonographic parameters (L, W, and A) (p > 0.05). Positive correlations were observed between TV and testicular L, W, and A (r = 0.96, r = 0.95, and r = 0.96, respectively; p ≤ 0.001). Pulse-wave-Doppler-derived parameters such as the pulsatility index (PI) and the resistive index (RI), as well as the total vascularity area (TVA) assessed by power Doppler, were similar in all of the age groups studied (p > 0.05). General linear model (GLM) analysis showed a relationship between TC and TV (OR = 0.95; p = 0.04), as well as between TC and TVA (OR = 0.99; p= 0.02). Finally, no differences were observed regarding the pregnancy rate among the different age groups (p > 0.05). In conclusion, TC increased as the age of the alpaca males increased. Although TC was related to TV and TVA, the pregnancy rates obtained from individuals belonging to the different age groups were similar, indicating that TC, TV, and TVA were not determining factors in assessing the potential age-related fertility differences in alpaca males.

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“…The pattern of secretion of progesterone and estradiol-17β has been well-documented in cattle, buffalo, sheep, goat, mare and pig but is less well understood and limited in the camel (Ayoub et al, 2003). Camel is different in that the ovulation is an induced rather than the spontaneous type in most species (Sumar, 2000). Rhythmic secretion of these sex steroids has a definite correlation with sexual behavior and receptivity of the male by females in other species of livestock.…”

Section: Introductionmentioning

confidence: 99%

Plasma profile of progesterone, estradiol-17beta and some blood biochemical attributes during different gestation periods in Iraqi female dromedary camels (Camelus dromedarius)

Abdulkareem

AL-Rawi

Abdul-Rahaman

2015

Emir. J. Food Agric

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This study was conducted to demonstrate the plasma profile of progesterone, estradiol-17β and some blood biochemical attributes (glucose, cholesterol concentrations and alkaline phosphates activity) of Iraqi female dromedary camels (Camelus dromedarius) during different gestation periods. This experiment included 5 multiparous, non-lactating Iraqi one-humped female camels (Camelus dromedarius) of 7-8 years old. Blood was collected from female camels at days 20, 30, 40, 50, 60, 90, 120,. The plasma progesterone concentrations did not significantly differ among days 20-120 PM. Greater (P≤ 0.05) progesterone concentrations were observed at days 150 and 180 PM as compared with days.20, 30 and 40 PM. No remarkable alterations in plasma estradiol-17β concentrations were seen among different gestation periods. Non-significant variations were detected in plasma glucose concentrations during the entire gestation periods studied (day 20-60 PM). Higher (p<0.05) cholesterol concentrations were observed at days 20 (9.86 ± 0.59 mg/dl) and 30 (8.84 ± 0.32 mg/dl) in comparison with their counterpart values at days 50 (7.06 ± 0.1 mg/dl) and 60 (6.29 ± 0.26 mg/dl) PM. The overall mean of plasma alkaline phosphatase activity did not alter during the whole study period. In conclusion, the pronounced changes during gestation period in dromedary camels can be detected through sex hormones and plasma cholesterol concentrations.

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Llamas and Alpacas

Cited by 4 publications

References 32 publications

Impact of vitamin AD3E treatment before application of controlled intra-vaginal drug releaser (CIDR) on clinical and hematologic findings, ovarian hormones and calving rates in she camels (Camelus dromedarius)

Impact of vitamin AD3E treatment before application of controlled intra-vaginal drug releaser (CIDR) on clinical and hematologic findings, ovarian hormones and calving rates in she camels (Camelus dromedarius)

Age-Related Differences in Testosterone Concentration and Its Relation to Testicular Biometrics, Hemodynamics, and Fertility in Alpacas (Vicugna pacos)

Plasma profile of progesterone, estradiol-17beta and some blood biochemical attributes during different gestation periods in Iraqi female dromedary camels (Camelus dromedarius)

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