The effects of season on the circulating testosterone level in the pubertal West African dwarf buck in its native environment

Bitto, I. I.; Egbunike, G. N.; Nduka, Euo; Akusu, M. O.

doi:10.4314/tjas.v3i1.49748

Cited by 3 publications

(5 citation statements)

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“…Gonadal sperm reserves in all seasons have been reported to be higher in WAD bucks than values observed for Red Sokoto Maradi bucks (Ogwuegbu et al 1985). The same trend has been observed in extra gonadal sperm reserves (Bitto et al 2000) thus confirming earlier observations that the WAD bucks might have a higher reproductive capacity in the humid tropical zone than other ruminant species and could be used for breeding purposes all year round.…”

Section: Reproductionsupporting

confidence: 89%

“…Daily sperm production (DSP) values obtained by both quantitative histology and from testicular homogenates was higher in WAD bucks (Bitto et al 2000) than values reported for Red Sokoto Maradi bucks (Carew and Egbunike 1980). Breed differences could be attributed to the variations observed in the sperm production rates and suggest a higher sperm production potential in the WAD buck.…”

Section: Reproductioncontrasting

confidence: 59%

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Physiological adaptation to the humid tropics with special reference to the West African Dwarf (WAD) goat

Daramola

Adeloye

2008

Trop Anim Health Prod

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West African Dwarf (WAD) goats are widely distributed in the subhumid and humid zones of Africa but are particularly associated with less favourable environments. Adaptive features such as feeding behaviour, efficiency of feed use and disease tolerance enable WAD goats to thrive on natural resources left untouched by other domestic ruminants. In marginal environments this goat remains the only domestic species that is able to survive. Among its physiological features small body size and low metabolic requirements are important traits that enable the animal to minimize its requirements in area or season where food sources are limited in quality and quantity. Specialized feeding behaviour and an efficient digestive system enable the animal to maximize food intake. Coat colour plays an important role in the evolved adaptation of this goat type. Reproductive fitness as manifested by prolific breeding is a major factor of adaptation. Defence mechanisms against infectious agents enable this type to thrive well in the hot humid tropics. The mechanisms involved in the regulation of these physiological functions of WAD goat are discussed. An understanding of these mechanisms could result in the development of improved techniques for enhancing goat productivity in humid environments.

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Section: Reproductionsupporting

confidence: 89%

Section: Reproductioncontrasting

confidence: 59%

Physiological adaptation to the humid tropics with special reference to the West African Dwarf (WAD) goat

Daramola

Adeloye

2008

Trop Anim Health Prod

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“…In addition, older bucks constitute a problem as their libido and reaction time decline with increasing age (Bitto and Egbunike, 2012). Inspite of recent reports in WAD bucks on sperm production rate and sperm storage capacity (Bitto and Egbunike, 2006a), testicular morphometry (Bitto and Egbunike, 2006b), some biochemical characteristics of spermatozoa and seminal plasma (Bitto and Egbunike 2007) as well as the histometry of the tests (Bitto and Egbunike, 2008), information on the use of Gonadotrophin for induction of spermatogenesis in WAD bucks is still lacking.…”

Section: Introductionmentioning

confidence: 99%

Effect of Gonadotrophin (Pergonal®) on semen characteristics, hormonal profile and biochemical constituents of the seminal plasma of West African Dwarf (WAD) bucks

Egu¹

2018

J. Anim. Sci. Vet. Med.

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Sixteen healthy West African Dwarf (WAD) bucks aged 2.0 to 2.6 years, weighing between 8.50 kg and 8.52 kg were used to study the effect of gonadotrophin (Pergonal®) on semen characteristic, hormonal profile and biochemical constituents of the seminal plasma. The 16 WAD bucks were divided into 4 treatment groups. Each treatment group consisted of 4 bucks with one buck per replicate in a Completely Randomized Design (CRD) with 4 levels of Pergonal® as treatment. The levels of Pergonal® were 0.00 i.u (T1), 9.00 i.u (T2), 18.00 i.u (T3), and 27.00 i.u (T4) Pergonal® injections (Ferring Labs USA). The group which contained no Pergonal® served as the control (T1), administered with 1.00 ml physiological saline. All the treatments were given by intramuscular injections. The results showed significant differences (P0.05) among the treatment groups in all the parameters for semen quality: semen volume, mass motility, semen pH, individual motility, sperm concentration, proportion of live, normal and dead sperm cells. The results further showed that there were significant differences (P0.05) among the treatment groups in luteinizing hormone (LH), follicle stimulating hormone (FSH) and testosterone levels in the serum. Similarly, the results showed that there were significant differences (P0.05) among the treatment groups in sodium, potassium, calcium, magnesium, fructose, bicarbonate, urea, Ascobic acid and citric acid in the seminal plasma. The results of this study showed that Pergonal (R) enhanced semen quality and was not detrimental to the hormonal profile and biochemical constituents of the seminal plasma of the WAD bucks.

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“…The improvement of the tropical breeds of goats generally and the WAD goat in particular for higher productivity has been successfully done (Leboeuf et al, 1998). Specifically, studies on semen characteristics and hormonal profiles of adult and pubertal WAD bucks have been done by some authors (Akusu et al, 1984;Ugwu & Orji, 1984;Bitto et al, 2000). Also, haematology, testosterone concentation, testicular morphometry and biochemical characteristics of spermatozoa and seminal plasma have been evaluated under different conditions (Bitto et al, 2000;Bitto & Egbunike, 2006, 2007and 2012.The WAD goat, however, still needs to be largely improved.…”

Section: Introductionmentioning

confidence: 99%

“…Specifically, studies on semen characteristics and hormonal profiles of adult and pubertal WAD bucks have been done by some authors (Akusu et al, 1984;Ugwu & Orji, 1984;Bitto et al, 2000). Also, haematology, testosterone concentation, testicular morphometry and biochemical characteristics of spermatozoa and seminal plasma have been evaluated under different conditions (Bitto et al, 2000;Bitto & Egbunike, 2006, 2007and 2012.The WAD goat, however, still needs to be largely improved. The use of medicinal plants, such as Spondias mombin (a fructiferous plant found in the tropics), has been advocated in order to achieve higher productivity in livestock (Mussarat et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

Haemogram and hormonal profile of WAD bucks treated with leaf ethanolic extract of <i>Spondias mombin</i>

Oloye¹,

Ola-Davies²,

Oyeyemi³

2017

Sokoto J. Vet. Sc.

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The goats had well-formed pendulous scrotum with well descended free bilateral testicles. The goats were kept in a standard goat pen and fed with fresh green centrosema leaves in the morning and commercially prepared ration in the evening. Water was served ad libitum. Pre-treatment haematological and hormonal profiling after aseptical collection of blood from the bucks was followed with 14 days of oral treatment with ethanol extract of Spondias mombin at the dosage rate of 800mg/kg BW. Post-treatment haematological and hormonal studies followed after. The hormones assayed were follicle stimulating hormone (FSH), luteinising hormone (LH), testosterone, progesterone, estrogen and prolactin. The haemogram revealed significantly (p < 0.05) higher PCV (24.33±0.6 %) in pre-treatment compared to 19.92± 1.1 % recorded for post-treatment. However, both were lower in values than normal range. WBC and RBC did not change significantly but while RBC values for pre-treatment and post-treatment fell within normal range, only the WBC value of post-treatment did. Assay of FSH, progesterone, estrogen and prolactin revealed no significant (p . 0.05) difference between pre-treatment and post-treatment; however, noticeable higher pre-treatment LH concentration and elevated post-treatment testosterone concentration were observed. The work showed that Spondias mombin at 800mg/kgBW has profertility tendencies in the buck and can be considered as an aphrodisiac in goat breeding in developing countries probably at a higher dosage.

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The effects of season on the circulating testosterone level in the pubertal West African dwarf buck in its native environment

Cited by 3 publications

References 0 publications

Physiological adaptation to the humid tropics with special reference to the West African Dwarf (WAD) goat

Physiological adaptation to the humid tropics with special reference to the West African Dwarf (WAD) goat

Effect of Gonadotrophin (Pergonal®) on semen characteristics, hormonal profile and biochemical constituents of the seminal plasma of West African Dwarf (WAD) bucks

Haemogram and hormonal profile of WAD bucks treated with leaf ethanolic extract of <i>Spondias mombin</i>

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