“…We examined the variation at 21 polymorphic microsatellites: 15 loci developed for alewife ( Ap010, Ap033, Ap037, Ap038, Ap047, Ap058, Ap070, Ap071 ) and blueback herring ( Aa046, Aa070, Aa074, Aa081, Aa082, Aa091, Aa093 ) (A'Hara et al . ) that were common across studies and six additional loci developed for alewife ( Aps1, Aps2A ; Bentzen & Paterson ), blueback herring ( Aa039; A'Hara et al . ) and American shad ( A. sapidissima ) [ AsaD042, AsaC249 (Julian & Bartron ), Asa8 (Waters et al .…”