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Articles by J. Mohan
Total Records ( 2 ) for J. Mohan
  K. Dhama , R.P. Singh , K. Karthik , S. Chakraborty , R. Tiwari , M.Y. Wani and J. Mohan
  Spallanzani’s thought of Artificial Insemination (AI) has revolutionized the animal husbandry field, both in developing and developed countries, by improving the genetic potential of livestock and poultry; minimizing the managemental costs and holding the service of genetically superior males even after their death. AI in domesticated birds especially in turkey shows promising results unlike other domestic and wild animals. The advantages of AI are many which support the wide adaptation of this technique in the poultry industry to augment its growth. Making AI as an integral part of captive breeding programme for non-domesticated birds would facilitate the process of saving various endangered species of wild birds. However, there are various problems involved in case of birds which need to be addressed before implementing AI. Apart from these, AI also poses a risk of possible transmission of various infectious pathogens/diseases of poultry through semen or its contamination or during the process of insemination. Hence, careful and regular screening and monitoring of poultry will help to check the spread of such diseases. Novel methods are adopted to prevent the colonization of contaminant microbes in stored semen thereby minimizing the pathogen transfer. The recent advances in biotechnology and molecular biology need to be explored fully for early and rapid diagnosis of poultry diseases. This would help in formulating appropriate disease prevention and control strategies and thus safeguard poultry health and production. This review describes the salient facts about AI practices in poultry and possible transmission of infectious pathogens during insemination along with suitable prevention and control strategies to be adapted.
  N. Shit , R.P. Singh , K.V.H. Sastry , J. Mohan , N. Pandey and R.P. Moudgal
  In sexually active male Japanese quail cloacal gland hypertrophy and foam production is androgen dependent and highly positively correlated with testis size and sexual activity. Nevertheless, the physiological functions of this gland in male reproduction are still a controversial issue. Therefore, the aim of this investigation was made to rule out the effect of cloacal gland size on semen production, sperm activities and fertility in both Heavy Body Weight (HBW) and White Feathered (WF) lines of Japanese quail. Sixty matured males and thirty females (8 weeks) from each lines of Japanese quail were randomly selected. Males were categorized into three groups (20/group) based on the increasing order of cloacal gland area. They were maintained in uniform husbandry condition with ad libitum feed and water at 14 h photo-schedule. Highest (11.04±0.20 and 9.6±0.41) semen production was recorded in birds having largest cloacal gland area and was positively correlated to the cloacal gland size in both the experimental quail lines. Metabolic activity by adopting Methylene Blue Reduction Time (MBRT) test and proteolytic activity by Acrosine Proteolytic Activity (APA) test of quail spermatozoa was found significantly different (p≤0.05) among groups and also revealed a positive correlation to the increasing area of the cloacal gland. In both the experimental lines, fertility was noted maximum (p≤0.05) in group III categorized by largest cloacal gland area. From this current study, it may be concluded that cloacal gland can be considered as external indicator or selection marker of testicular functions in male Japanese quail.
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