In the article, "Ghost of Speciation Past" (Nature, Vol. 435, pp. 29-31), T. D. Kocher looked at the origins of a diverse flock of cichlid fishes in the lakes of southeast Africa. Suppose that you wanted to select a sample from the hundreds of species of cichlid fishes that live in the lakes of southeast Africa. If you took a simple random sample from the species of each lake, which type of sampling design would you have used? Explain your answer.