Latitudinal Differentiation in Copepod Growth: An Adaptation to Temperature

1985/10/01 by Darcy J. Lonsdale, Jeffrey S. Levinton · 12 citations
Earth and Planetary Sciences · Environmental Science · #Marine Biology and Ecology Research #Marine and fisheries research #Marine and coastal ecosystems

paper · doi:10.2307/1938002

Abstract

We demonstrate the presence of significant differentiation in development rate, adult body length, and stomatic growth rate in the estuarine harpacticoid copepod Scottolana canadensis (Willey) collected from a broad range of latitudes (27°—43° N) and reared in the laboratory for several generations under the same conditions (15 g salts per 1000 g seawater, and 15°, 20°, 25°, or 28°C). The changing pattern of differential growth with increased temperature suggests local adaptation to maximize scope for growth under prevailing temperatures conditions; northern—derived individuals grew faster at low but not at high temperatures.

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