There are basically three different breeds of bird for poultry business; Broilers, Cockerels, and Layers.
The Broilers grows very faster, the Cockerels grows slower before they are matured for marketing.
But, Cockerels are reliable in terms of survival and withstanding bad weathers. They are more resilient, and can absorb shocks far better than Layers and Broilers.
For meat production, the main breed is Broilers and Cockerels, For Egg production, Layers are used.
The Yoruba Ecotypes, referred to as the light ecotypes, are the local chickens from the following parts of Nigeria: Rainforest, Swamp and Derived Savannah zones. They weigh around 0.68kg to 1.5kg.
The difference between these two breeds, Fulani ecotypes and Yoruba ecotype, is that the former has higher body weight than the latter.