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Figure 1 | BMC Evolutionary Biology

Figure 1

From: Parallel reduction in expression, but no loss of functional constraint, in two opsin paralogs within cave populations of Gammarus minus (Crustacea: Amphipoda)

Figure 1

Sampling locations for three pairs of Gammarus minus sister populations and one outgroup population surveyed. Two pairs of sister populations were sampled from drainage basins in Greenbrier County, WV: the Spring Creek (US = US219 Spring, HC = Hole Cave) and Davis Spring (DAS = Davis Spring, PC = Persinger’s Cave) drainage basins. One pair of sister populations from a drainage basin in Tazewell County, VA was sampled: the Ward Cove drainage basin (MDS = Maiden Spring, FRC = Fallen Rock Cave). An outgroup surface population, Vidmont Spring (VS), was sampled from Jefferson County, WV. Cave sites are depicted as dark circles and surface sites are open circles. Dashed lines indicate subterranean conduits of unknown topology whose hydrological connection to surface resurgences have been identified through dye tracing. Arrows indicate the direction of water flow.

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