Diners can expect long-term chicken shortages even though mainland authorities yesterday gave more poultry farms their stamp of approval. Agricultural authorities ignored importers' calls for an increase in the supply of chickens and said they had to stick to the original plan. About 40,000 chickens were supplied yesterday although importers had asked for 55,000. Poultry stalls were emptied in hours even though birds were selling for $100 each - about twice the pre-ban price. Shenzhen Animals and Plants Quarantine Bureau's deputy director Tan Guoying said yesterday 14 more farms had been cleared to export chickens. Mr Tan said: 'The supply will remain at about 40,000 for the next two days and will increase to 50,000 from Friday. 'The economic and trade authorities had set the quotas . . . We cannot change them arbitrarily.' His remarks contradicted Secretary for Economic Services Stephen Ip Shu-kwan, who said on Monday that no quota had been imposed and supplies were determined by market forces. A bureau spokesman was not available for comment last night.