AN SC312 Lecture 6: Lecture 6 Notes
1 Feb 2018
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Lay a certain number of eggs then stop. If you continue to take the eggs away they will continue to lay. Selected for appetite, growth rate, breast muscle yield. Can"t get more selected for growth rate because the birds will stop laying eggs. This is the end of pushing for meat because they need to be sustainable. But ideally you do(cid:374)"t (cid:449)a(cid:374)t it to go do(cid:449)(cid:374) (cid:373)uch. Total mass of egg is usually the same. Can control when she starts laying by controlling daylight. Before never use to see a rudimentary, non-functional right oviduct. Now almost all birds being dissected has one. Sometimes the infundibulum doesn"t catch the yolk and it ends up in the body cavity. This is where the egg white is despoited. A waxy cuticle film is applied here to seal egg pores to prevent microbes entering and infecting the egg. Everything that goes into the yolk is found in the liver.
