Poultry Science- ICAR JRF/SRF 2024

• Physiological Zero in Embryology:
• The physiological zero temperature for avian eggs is defined as the temperature below which embryonic cell division (blastoderm development) is suspended in physiological arrest:

• Hatching eggs awaiting incubation are stored at $15 - 18^\circ\text{C}$ (well below physiological zero) to maintain dormancy. If eggs are stored between physiological zero ($24^\circ\text{C}$) and incubator temperature ($37.5^\circ\text{C}$), abnormal embryonic development occurs, causing early embryonic mortality.
• nalysis:
• (24 °C): Correct standard physiological zero temperature.

Correct option: (3) 249

• Indigenous Anseriformes of India:
• Kashmir Anz: An indigenous domesticated breed of Goose (Anser anser) native to the temperate wetlands, Dal lake, and Wular lake ecosystems of the Kashmir Valley.
• Reared extensively by local farming communities for meat, large eggs, and high-quality down feathers.
• nalysis:
• (Geese): Correct species.

Correct option: (2) Geese

• Australorp Breed Profile:
• Developed in Australia through selective breeding of the Black Orpington (which is an English Class breed).
• According to the American Standard of Perfection and poultry classification criteria, Australorps are officially classified under the English Class of poultry, characterized by white skin, red earlobes, and dual-purpose utility.
• nalysis:
• (English): Correct poultry class.

Correct option: (3) English