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The morphology and morphometry of the epididymis in the greater cane rat (Thryonomys swinderianus Temmincks).

The structure and morphometry of the epididymis in the greater cane rat were studied in this work. In assessing the morphology and characterising the morphometric values, a total of 15 adult male greater cane rats, bred and raised in captivity, were used. All the animals had brownish perineal staining, which was taken as index of sexual maturity in male cane rats, and they were maintained on elephant grass stems with water given ad libitum. From this work, the epididymis of the greater cane rat was observed to have a mean weight of 0.0365 ± 0.091 g, forming about 0.016% of the total body weight and an average volume of 0.36 ± 0.08 mL. There was a positive correlation between the epididymal weights, testicular weight, and the body weight in this animal. However, the gross divisions of the epididymis into head, body, and tail were not conspicuous in the cane rat; instead it had two divisions - the cranial and the caudal divisions. In addition, based on the histological and histomorphometric analyses, five zones were observed in the epididymal epithelium of this animal. This preliminary information on the epididymis will serve as a basis for further research on the epididymis of the greater cane rat and will contribute to the knowledge of the its reproductive biology, which will subsequently aid in the captive rearing and domestication of this animal.