Egg Laying and Ovarian Follicular Growth in Japanese Quail under Continuous Lighting.

Sonoda, Yutaka; Kai, Osamu; Imai, Kiyoshi

doi:10.2141/jpsa.34.308

Cited by 3 publications

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“…1980 25 2 2 negative lag 5:00ϳ19:00 14 7 7 4,000 76% 9 5ϳ8 10ϳ16 1988 2-3 (Simmons & Hetzel 1983) (Woodard et al 1963) Coturnix coturnix japonica Coturnix japonica 3ϳ4 Opel 1966, 1985, Sonoda et al 199780% (Sengupta 1974 Figure 1. Structure of hen's egg after oviposition (cited from Imai 1980).…”

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Imai¹

2003

Japanese Journal of Ornithology

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Abstract. Domestic fowl, Gallus gallus domesticus, is the most important poultry (domesticated birds that serve as a source of egg or meat to human beings) in the world. The process of egg production in the female bird is composed of follicular rapid growth in the ovary, ovulation of the largest follicle, egg formation in the oviduct and oviposition. In the present review, the ovipository pattern, the egg producing process and its physiological regulation, especially endocrine control, in the hen are described. The period required to follicular rapid growth is 8 days with a highest frequency, ranging from 7 to 10 days in almost all the follicles examined. Ovulation of the largest follicle in the ovary is mainly controlled by pituitary LH and follicular progesterone. Egg formation, being constituted by egg white, shell membrane and egg shell surrounding yolk, is conducted in the oviduct during about 24 hours. Vasotocin and prostaglandins play an important role participating in oviposition.

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