Common Duck-Brown Tsaiya

Drake

Hen
Location of Conservation: Ilan Research Station
Taiwan Livestock Research Institute
28-1 Jehsin village
Wuchieh, Ilan, Taiwan
Republic of China
Tel: 886-39-503107¡ã9
Fax: 886-39-501950
Contributor: Mr. Jang-Fang Huang

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Visible Characteristics
  1. Brown Tsaiya have brown or light brown feathers.
  2. Dark green or dark brown over the head and neck.
  3. Females' beaks turn from orange to chestnut after egg laying.
  4. Lay up to 320 eggs a year but don't brood on them.
  5. Sex feather appearsafter 6 weeks old in drake and its color is greenish or brown at mature.
  6. Congregate, jittery, easily frightened.

Growth
Performance Mean±SD
Body weight at
¡@10 weeks old(M) 1.10±0.14 Kg
¡@16 weeks old(M) 1.25±0.13 Kg
¡@20 weeks old(M) 1.33±0.11 Kg
¡@40 weeks old(M) 1.36±0.13 Kg
Body weight at
¡@10 weeks old(F) 1.07±0.12 Kg
¡@16 weeks old(F) 1.24±0.12 Kg
¡@20 weeks old(F) 1.39±0.11 Kg
¡@40 weeks old(F) 1.48±0.12 Kg
8th feather length¡@¡@¡@
¡@10 weeks old(M) 9.9±2.8 cm
¡@16 weeks old(M) 15.8±0.6 cm
¡@20 weeks old(M) 15.8±0.5 cm
8th feather length
¡@10 weeks old(F) 10.6±2.7 cm
¡@16 weeks old(F) 15.3±0.4 cm
¡@20 weeks old(F) 15.1±0.4 cm

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Reproductive Laying
Performance Mean±SD Production
Age at first egg 15 weeks
Number of eggs¡@¡@¡@ Hen-day egg
produced at production from
40 weeks old - eggs 15 to 104 weeks of
360 days old - eggs age: Peak at 34
Egg weight weeks of age with
produced at 65.5¢H
30 weeks old 63.7±4.5 g Laying period with
40 weeks old 70.1±4.1 g over 60¢H hen-day
78 weeks old 66.5±5.9 g egg production: 29
Shell strength of to 80 weeks of age
egg produced at
30 weeks old 3.7±0.7 Kg/cm2
40 weeks old 3.4±0.8 Kg/cm2
Yolk weight of
egg produced at
30 weeks old 21.1±2.0 g
40 weeks old 24.8±2.2 g 
     
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