Experimental Design In to test these hypotheses , the study will be divided into two phases : the in vivo phase and in vitro phase . At the in vitro phase , groups of experimental populations of Mallard ducks will be placed in a study area which will allow observation of significant behavioral patterns relevant to foraging , reproductive tactics /quality such as mate preference , clutch size , egg size and viability , and interspecific competition . Two species of closely related species of ducks the Anas rubipes...











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