Reproductive Physiology of Dromedary Camels

Dromedary camels exhibit a pronounced seasonal reproductive pattern driven by changes in day length and ambient temperature. As short-day breeders, both males and females respond to decreasing photoperiod through cascades of hormonal events orchestrated by the hypothalamic–pituitary–gonadal axis. In females, the transition to the breeding season is marked by a resumption of follicular waves, rising oestradiol concentrations and eventual ovulation, with corpus luteum formation and progesterone production preparing the endometrium for potential pregnancy. In males, the rutting season is characterised by enlargement of the testes, intensification of spermatogenic activity within seminiferous tubules and elevated circulating testosterone. Morphological adaptations include increased diameter of seminiferous tubules, enhanced vascularity of the testicular parenchyma and development of secondary sexual features such as poll glands. Reproductive performance is also influenced by metabolic status and environmental stressors; antioxidant defences within testicular tissue fluctuate seasonally to protect against lipid peroxidation. Unique aspects of camelid reproduction, such as induced ovulation in females and the complex dynamics of male courtship behaviours, reflect evolutionary adaptations to arid environments. Understanding these physiological processes underpins strategies to manipulate breeding seasonality, optimise semen collection and improve fertility outcomes, with significant implications for pastoral communities and intensive production systems across the Middle East, North Africa and South Asia.

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Reproductive Physiology of Dromedary Camels publication trend

The graph below shows the total number of articles in reproductive physiology of dromedary camels across all publications each year (not limited to Nature Index journals).

Technical terms

Photoperiodism: Physiological response to the duration of daylight and darkness that regulates reproductive seasonality.

Seasonal breeder: Species that confines its reproductive activity to specific times of the year in synchrony with environmental cues.

Melatonin: Hormone secreted by the pineal gland that conveys photoperiodic information to the reproductive endocrine axis.

Spermatogenesis: The developmental process by which spermatozoa are produced within the seminiferous tubules of the testes.

Seminiferous tubules: Coiled ducts within the testes where germ cells proliferate, differentiate and undergo maturation into spermatozoa.

References

1. Rythme nycthéméral de la sécrétion de mélatonine chez le dromadaire (Camelus dromedarius). Revue d’Elevage et de Médecine Vétérinaire des Pays Tropicaux (1997).
2. Characteristics of Ultrasound and Magnetic Resonance Imaging of Normal Testes and Epididymis Besides Angiography of Testicular Artery in Dromedary Camel. Frontiers in Veterinary Science (2022).
3. Differential cellular localization of lectins in the testes of dromedary camel (Camelus dromedarius) during active and inactive breeding seasons. BMC Veterinary Research (2023).
4. Gas/Liquid Chromatography–Mass Spectrometry Analysis of Key Functional Substances Regulating Poll Gland Secretion in Male Camels during Seasonal Estrus. Animals (2023).
5. Serological and histolomorphological investigation of camel bulls testes (Camelus dromedaries) during the rutting and non-rutting seasons. BMC Veterinary Research (2024).