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Author: Komalpreet Kaur × End date: 2019 × Start date: 2016 × Type: Thesis × Thesis Type: M.Sc ×
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    ThesisItemOpen Access
    Growth and breeding biology of Tatera indica in relation to its management practices
    (Punjab Agricultural University, Ludhiana, 2016) Komalpreet Kaur; Singla, Neena
    During present study on growth and breeding biology of Indian gerbil, Tatera indica, a gradual increase in body weight and length of different body parts was observed in gerbils of both sexes collected from crop fields. All the mature females were found cyclic with average duration of one oestrous cycle to be 3.0 days. Laboratory breeding of mature male and female gerbils resulted in 88% success with average litter size of 5.14 and gestation period of 22.45 days. Postpartum oestrous was observed immediately after parturition in female gerbils not separated from males resulting in back to back pregnancy. Observations on postnatal growth of pups of seven different age groups (30, 45, 60, 75, 90, 105 and 120 days old) of each sex revealed significant increase in body weight, length of different body parts, weight of reproductive organs (testis, epididymis, ovary, uterus) and accessory sex glands (seminal vesicles and prostate gland), level of sex hormones (testosterone and estradiol) and specific activity of enzymes (17 β-HSD and 3β-HSD) with increasing age. In males, descending of testes to scrotum, preputial separation and presence of spermatozoa in seminiferous tubules and cauda epididymis were observed at the age of 105 days onwards. In females, ovulation leading to formation of corpus luteum was observed at the age of 90 days onwards. Present study depicts that sexual maturity in T. indica is attained at the age of 3-4 months. The control measures should therefore be planned before they become sexually mature and start producing next generation.