Related Experiment Video
Updated: Jul 16, 2026

Ecotoxicological Effects of Microplastics on Bird Embryo Development by Hatching without Eggshell
Published on: August 14, 2021
The effects of different breeding systems on egg productivity and egg quality characteristics of Rock Partridges
1Department of Animal Science, Veterinary Faculty, University of Firat, 23119 Elazig, Turkey. oozbey@firat.edu.tr
Abstract:
This study was carried out to investigate the effects of different breeding systems (breeding on the ground and in the cage) on the egg production and egg characteristics of Rock Partridges. Egg production values of the ground and cage system groups were determined as 41.30 and 49.40%, respectively, and this difference was found to be significant (P < 0.05). The weight values of the eggs were 23.86 g in the ground system and 22.08 g in the cage system (P < 0.05). The difference between the shape index values, which were determined as 75.39 in the ground system and as 77.65 in the cage system, was statistically significant (P < 0.05). In addition, the values for yolk index (48.42 and 44.11), albumen index (1.45 and 1.66), Haugh unit (83.24 and 86.78), shell weight (2.39 and 2.86), yolk weight (8.55 and 7.89), and albumen weight (12.46 and 11.78) obtained in the ground and cage system, respectively, were obtained to be statistically different (P < 0.05). It was observed that the Rock Partridges could be bred in ground and cage systems during the egg production period, and although the investment cost and equipment expenditure increase in cage breeding, the egg quality, shape index, albumen index, and Haugh unit of Rock Partridges decrease dramatically in ground breeding.
More Related Videos
Related Concept Videos
Mate Choice
Background and Environment Affect Phenotype
An example of how genetic background affects phenotype can be seen in horses. The Extension gene in horses is responsible for their coat color. A wild-type gene (EE) produces black pigment in the coat, while a mutant gene (ee) produces red pigment. A...
Energy Budgets and Reproductive Strategies
Complementation Tests
Organisms heterozygous for different mutations are crossed pairwise in all combinations. If present on different genes, the mutations can complement each other by providing the missing...
Monohybrid Crosses
Conservation of Declining Populations

