Noise-induced hormonal & morphological malformations in breeding pigeons

Area of Science:

• Environmental Science
• Animal Physiology
• Toxicology

Background:

• Environmental pollution poses significant risks to animal health, particularly birds, due to constant exposure.
• Avian species are susceptible to various environmental stressors, including noise pollution, impacting their physiological well-being.

Purpose of the Study:

• To investigate the physiological effects of different types of noise pollution on pigeon health.
• To assess the impact of road traffic, military, and human activities noise on serum hormone levels and feather development in birds.

Main Methods:

• An experimental study involving 24 pigeon birds over 60 days.
• Birds were exposed to controlled environmental conditions and specific noise stressors (road traffic, military, human activities) for 5-6 hours daily.
• Serum hormone levels (corticosterone, TSH, LH, FSH) and feather structure were analyzed at 20, 40, and 60 days.

Main Results:

• Noise stress significantly increased serum corticosterone and TSH levels.
• Significant decreases in luteinizing hormone (LH) and follicle-stimulating hormone (FSH) were observed.
• Major fault bar formation in feathers was prominent in noise-exposed groups, indicating physiological stress.

Conclusions:

• Noise pollution acts as a significant stressor for birds, altering key endocrine functions.
• Elevated stress hormones and disrupted reproductive hormone profiles are linked to noise exposure.
• Feather abnormalities serve as a visible indicator of noise-induced stress in avian populations.