1992
DOI: 10.1007/bf02356750
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Seasonal influences on gonadal and extragonadal sperm reserves in Small East African zebu (Bos indicus) bulls in Ethiopia

Abstract: Body weight and scrotal circumference (SC) data were taken ante mortem and genitalia collected after slaughter from Small East African zebu (SEAZ) bulls slaughtered during the wet (n = 46) and the dry (n = 53) seasons. Bulls slaughtered during the wet season were significantly heavier (47 kg) and had significantly larger SC measurements (3.3 cm) than those slaughtered during the dry season. Mean (+/- s.e.m.) paired testes weights were 233.7 +/- 13.8 and 292.8 +/- 11.3 g and epididymal weights 26.8 +/- 0.9 and … Show more

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Cited by 4 publications
(4 citation statements)
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“…Rahaji had the highest (148.18±2.49x10 6 ) then BJ (135.19±2.31x10 6 ) while similar and least values were recorded on SG (117.47±2.40x10 6 ) and AG (111.94±2.37x10 6 ). The significant genetic group differences observed on gonadal and extra gonadal sperm reserve count in this study has been consistent with the findings of Salau-Dauda Shoyinka (1983); Tegegne et al ., (1992b) and Britto et al, (2002 and2006) who reported breed variability in gonadal and extra gonadal sperm reserve in Bos indicus genetic group. Gonadal sperm production has been reported to be dependent on the amount of sperm producing testicular parenchyma tissue which is mainly influenced by nutrition and breed (Tegegne et al, 1992a and b).…”
Section: Resultssupporting
confidence: 93%
See 1 more Smart Citation
“…Rahaji had the highest (148.18±2.49x10 6 ) then BJ (135.19±2.31x10 6 ) while similar and least values were recorded on SG (117.47±2.40x10 6 ) and AG (111.94±2.37x10 6 ). The significant genetic group differences observed on gonadal and extra gonadal sperm reserve count in this study has been consistent with the findings of Salau-Dauda Shoyinka (1983); Tegegne et al ., (1992b) and Britto et al, (2002 and2006) who reported breed variability in gonadal and extra gonadal sperm reserve in Bos indicus genetic group. Gonadal sperm production has been reported to be dependent on the amount of sperm producing testicular parenchyma tissue which is mainly influenced by nutrition and breed (Tegegne et al, 1992a and b).…”
Section: Resultssupporting
confidence: 93%
“…Egbunike, et al, (1985) also reported seasonal effects on reproductive function in bull in the tropics to be related to nutrition, ambient temperature, age and pathological factors. Tegegne, et al, (1992b) however reported that the effects of these factors on reproduction vary with breed and also husbandry practices.…”
Section: Resultsmentioning
confidence: 99%
“…The results also show that most of the respondents call the AI technician (AIT) over phone and those residing nearby take their cattle to the AI centers, these findings are in close accordance with the findings of ( Bainesagn,2016). It has also been reported in earlier studies that most of the AIT are unable to keep their words especially when the estrus is spread round the year (Mekonnen et al, 2010).This is because of disproportionately fewer numbers of AIT per woredas who are expected to cover long distances within a short span of time (Azage et al, 1995). It has also been reported earlier by the AIT that there are lack of AIT to provide AI service in Ethiopia (Azage and Hoekstra, 2011).…”
Section: Major Constraints Of Ai Service and Ways Of Delivering Systemmentioning
confidence: 92%
“…However, there are reports which indicate that the AI service in Ethiopia is far from satisfactory (Sinishaw, 2005). The wide application and success of AI and oestruses synchronization across the developed world and its success in Africa and other developed country is still low owing to technical inefficiencies besides managerial and other infrastructure related issues (Azage et al, 1995. It has been reported by Dekeba et al(2006) the efficiency of the AI service is declining due to inconsistent service especially among the small holder livestock production system of Ethiopian highlands. This could also be related to controlling of oestrus especially under conditions of small holder management and in many cases they are unable to identify the signs of oestrus (Woldu et al, 2011).…”
Section: Introductionmentioning
confidence: 99%