Cole & Hutt (1953) reported nesting in non-laying ovulating hens and Wood-Gush (1963) showed that nesting behaviour occurs in birds in which the functional oviduct had been removed and also in birds which had been turned into obligatory internal layers by ligating the infundibulum. Wood-Gush & Gilbert (1964) later found that the ruptured follicle was important for nesting behaviour to occur, for in twenty-five birds out of thirty-four in which this follicle was removed or ligated nesting behaviour was affected, while no significant effect was apparent in the sixty-two control birds which underwent one of three other treatments to the ovary, showing that nesting is highly correlated with the occurrence of ovulation. A striking feature of the behaviour of the original experimental internal layers studies was the high nesting rate. The data suggested that, if nesting behaviour is related to
D. G. M. WOOD-GUSH and A. B. GILBERT
A. B. GILBERT and D. G. M. WOOD-GUSH
A technique has been described for the fistulation of the hen's oviduct through the abdominal wall with recovery of the ovum.