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Effect of Caponization on Body Weight, Hematological Traits and Blood Cholesterol Concentration of Nara Chicken

M.M. Rahman
Proshika, Section-2, Mirpur, Dhaka-1216, Bangladesh.

M.A. Islam
Department of General Animal Science and Animal Nutrition, Dinajpur Government Veterinary College, Dinajpur, Bangladesh.

M.Y. Ali
Proshika, Section-2, Mirpur, Dhaka-1216, Bangladesh.

M.E.A. Khondaker
Department of Basic and Social Sciences,Dinajpur Government Veterinary College, Dinajpur, Bangladesh.

M.M. Hossain
Animal Health and Nutrition Division, Eskayef Bangladesh Ltd., Gulshan, Dhaka, Bangladesh.

Abstract/ Executive Summary:

A total of 21 four weeks old Nara males divided into 3 groups as A-non-caponized, B-chemically and C-surgically caponized birds having 7 males each. The birds were caponized at 4 weeks of age an d reared on individual cages up to 16 weeks of age to assess the body weight gain, hematological traits and blood cholesterol concentration. The weight gain was significantly increased in caponized birds compared to non-caponized birds (p<0.01). However, surgically caponized birds gained the highest body weight. Total erythrocyte count, packed cell volume and hemoglobin concentration were significantly reduced in caponized birds compared to non-caponized birds (p<0.01). Testis weight of group A and B at 16 weeks of age were 19.20 and 2.58 g/bird respectively. The highest enlargement of liver and spleen was found in group- C followed by group-A and B. Adrenal gland weight of A, B and C were 0.14, 0.21 and 0.26g/bird respectively (p<0.01). Reduced comb, wattle and head of caponized birds were observed compared to the non-caponized birds. Caponization is the most suitable technique to have maximum meat from chicken. However, surgically caponization may be the best technique for maximum growth.

Keywords: Chicken, Caponization, Body weight, Hematological traits, Cholesterol

Location: Bangladesh Agricultural University, Mymensingh, Bangladesh

Start Date:

End Date:

Program Area: Animal Health and Management

Commodity: Chicken

Objectives:

To assess the effect of caponization on growth, hematological traits and blood cholesterol concentration of Nara chicken.

Methodology:

The experiment was conducted at the Department of Physiology and Surgery and obstetrics, Bangladesh Agricultural University, Mymensingh, Bangladesh for a period of 4 months in winter. A total of 21 three weeks old Nara chicken were divided into 3 gropu; A-control, B-hormonal capon and surgical capon having 7 birds each. Caponization was performed in different methods like, 1) surgical, 2) chemical method. On 27^th day, 7 chicks of C-group were deprived of feed and water for 12 hours before caponization to avoid excessive bleeding duringh surgery and to make the testicle visible and easier to remove. Testicles were removed through the last ribs by using caponizing forceps. Nebanol skin ointment was used just after operation. On 28^th day, 7 birds of group-B were injected with 10 mg Devoprovera (R) subcutaneously on the neck region. After initial dose, further dose of 5 mg/bird was given at 5 weeks, 6 weeks and 7 weeks of age. After caponization, all the birds including control birds were reared on individual cages providing space of 1396 cm²/ bird. The birds were fed ad libitum diet containing 21% CP and 2900 kcal ME/kg. The following parameters were recorded during the experimental period: Bi-weekly individual bird up to the end of experiment. At 16 weeks of age, blood from each bird was collected by sterile syringe with needle and transferred to sterile tube containing anticoagulants (4% sodium citrate solution) at the ratio of 1:10. It was used for different hematological traits within two hours after collection and determined total erythrocyte count (TEC), ESR, PVC and Hemoglobin. At 16 weeks of age, blood from each bird was collected directly from the wing vein by needle puncture and cholesterol concentration was determined by “Rflotrom meter” an auto analyzer. Testis, liver, spleen and adrenal gland were removed after slaughtering and weighed. Changes of comb, wattle, hackle feather, saddle feather and hea d were also observed. Data were analyzed using computer MSTAT package program.

Source of Information: International Journal of Poultry Science 3 (4): 284-286, 2004

Article Link (Online Journal):

Funding Source:

Budget:

Total Budget (Tk.) :

Achievement/Findings:

This study revealed that caponized birds will be heavier than the non-caponized birds. After removal of testis, birds gained body weight rapidly. So, this technique may be used by the farmers under rural condition to have maximum meat as well as benefit.

Knowledge Management: Journal