ANSC 2340 Study Guide - Final Guide: Anterior Pituitary, Oviduct, Spermatozoon
21 Oct 2016
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Rhs lost at day 10 of incubation, while still in egg. Immature bird = 2000 ova visible (480,000) = 250 -500 will reach maturity and ovulate. Oviduct starts to develop at 15-16 wks = vastly different from broiler hen. Fully functional just prior to onset of egg production = 17-19wks. Regular egg production by 19 weeks (must be 19wks for producer to start making profit in canada) Ovary activated by light stimulating anterior pituitary to secrete fsh (follicle stimulating hormone) 11days before pullet lays first egg, fsh released from anterior pituitary. Development of medullary bone (ca supply for eggshell) Hepatic synthesis of lipids and proteins (needed for yolk formation which will feed developing chick/poult) Synthesis of albumen proteins, shell membranes , caco3, cuticle = in oviduct = components of egg. Yolk = source of energy for developing embryo (takes 10 days to mature) Once first yolk starts to mature, start of 2nd yolk starts 1 or 2 days after.
