A population study of the winter flounder Pseudopleuronectes americanus along the northeast Atlantic coastline of the United States

A population study involving a genetic analysis, specifically mitochondrial DNA, of the winter flounder Pseudopleuronectes americanus, was conducted on thirty-two individuals from each of four rivers: the Manasquan river, NJ; Connecticut river, CT; Hammonasset river, CT; and the Niantic river, CT. Composite digestion patterns were formed using six restriction enzymes which produced restriction patterns polymorphic between individuals. An UPGMA analysis among individuals and a G$\sb{\rm st}$ analysis among populations were performed as statistical tests to show genetic relationships among the four populations. These analyses indicated that the winter flounder population examined is homogeneous throughout without genetically distinct subpopulations detected.