Microscopic Features of Gonadally Inactive Testis of Khaki Campbell Duck (Anas platyrhynchos domesticus) in Bangladesh

The microscopic features of the testis were studied in gonadally inactive Khaki Campbell duck (Anas platyrhynchos domesticus) in Bangladesh. The study was conducted in the Department of Anatomy & Histology, Bangladesh Agricultural University, Mymensingh. Five adult healthy birds of one-year-old were used for this study. The testes were collected immediately after ethical killing of the birds for histological observations. The collected tissue samples were then processed and stained with Hematoxylene & Eosin (H & E) stain for histological observations. The seminiferous tubules showed considerable involution with cessation of spermatogenesis. The basal lamina of the seminiferous tubules was irregular in outline and was invaginated into the germinal epithelium in the form of finger-like plicae or folds. Most of the lumen of the seminiferous tubules was empty and all generation of germ cells were not present in most of the seminifeous tubules. The interstitium showed a relative increase in volume and interstitial tissue consisted of loose connective tissue, interstitial cells (Leydig cells), few connective cells and blood vessels. This study first time described the microscopic features of testis of Khaki Campbell ducks in Bangladesh during inactive phases of the reproductive cycle.

Effects of Rice Distillers Dried Grains with Soluble on Laying Performance of Khaki Campbell Duck

Background: In present scenario cost of common feed ingredients like maize and soybean are in rising trends due to less availability. Thus, the feed industry is forced to search the way to combat the feed cost. Rice Distillers Dried Grains with Solubles, is one of the best alternative source of feed ingredient. It has good source of energy, protein, vitamins and minerals. Presently, rice as subtract for bioethanol production is increasing due to its relative lower price, higher production and easy availability leads to increased availability of co-product rice distillers dried grains with solubles. In present study Nutrisigma® has been used. ‘Nutrisigma®’is rice distillers dried grains with solubles produced by IFB Agro Industries limited, Kolkata. In consideration of the above fact, the present experiment was designed to study the effects of “Nutrisigma®” on productive performance of Khaki Campbell ducks. Methods: A total of nine hundred female Khaki Campbell ducks of the same genetic background and of comparable body weight at 72 wks of age, were randomly assigned into 3 dietary treatments that is Control (C), Treatment 1 (T1) and Treatment 2 (T2) each with 3 replicates of 100 ducks and they were studied for 60 days. All the experimental ducks were fed 120gm/duck/day concentrate mixture. Treatment group received (T1 group @ 3 gm/duck/day and T2 group @ 5 gm/duck/day) ‘Nutrisigma®’ in addition to concentrate mixture. Result: In our experiment egg production (%), fertile egg production per day, fertility%, hatchable egg weight (gm) and hatchability% were increased significantly (p is less than 0.05) in treated groups compared with control group. Better economic efficiency was observed in T1 group compared to T2 and control groups. In conclusion, Nutrisigma ® with concentrate mixture could be used economically up to 5gm/head/day (T2) without any harmful effect on productive performance, however, the use of 3 gm/head/day (T1) is more economical than 5 gm/head/day.

Effect of feeding different levels of proteins on growth, blood biochemical and immunological parameters in laying Khaki Campbell ducks

A feeding experiment was carried out to study the effect of feeding different levels of protein during laying (20-40 weeks) on growth, feed consumption and mortality in Khaki Campbell ducks. 180 ducks were distributed randomly into three treatment groups viz. T1, T2 and T3 with three replicates of 20 ducks (15 females and 5 males) in each replicate. Birds were allotted to different groups in such a manner that there was no significant difference between the average 20th week body weight among the treatment groups. Between 20-40 weeks, ducks were provided with isocaloric diets with 16, 18 and 20 per cent crude protein in to groups T1, T2 and T3 respectively with ad lib provision of feed and water. Results indicated that supplementation of crude protein of about 18% in the ration during laying period might be sufficient with respect to growth trait in Khaki Campbell layer ducks. Further, the mortality ranged from 2 to 3.2% during laying stage, which was within normal range indicating that the different levels of protein supplementation in diet could not influence the health condition of ducks. The effect of different levels of protein supplementation in the diet during active stage of laying (30th week) was found to be non-significant, with respect to blood biochemicals like total protein, albumin, abumin:gobulin ratio, glucose, urea and creatinine concentration. The level of primary antibody in T1, T2 and T3 of female ducks were 6.00 ± 0.00, 5.33 ± 0.33 and 6.33 ± 0.33 and for combined sex they were 5.00 ± 0.52, 5.33 ± 0.33 and 5.67 ± 0.42, respectively.