Differences in life history patterns of American shad (Alosa sapidissima) populations between ancestral, Atlantic coast, and non-native Pacific coast rivers of North America
Thomas P. Quinn,
Lisa A. Wetzel,
Daniel J. Hasselman
et al.
Abstract:Organisms naturalized outside their native range can reveal new life history patterns in new environments. Here, we compare life history patterns of American shad, Alosa sapidissima, from five rivers along the U.S. Pacific coast (introduced range) with contemporary data from the Atlantic coast source populations. The Pacific coast fish grew slower, matured at a younger age, and were less often iteroparous than conspecifics from the Hudson River and Susquehanna River sources. Differences among the Pacific coast… Show more
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