Gammarus lacustris

Sanders, H.O. 1969. Toxicity of Pesticides to the Crustacean Gammarus lacustris. U.S. Fish Wildl. Serv. Tech. Paper 25. 14 pp. 

Aquatic organisms July-August 1986 Cladoceran, Bosmina longispina, whole Amphipod, Gammarus lacustris, whole Mayfly, Siphlonurus lacustris, whole Stonefly, 2 spp., whole Minnow, Phoxinus phoxinus, whole Brown trout, Salmo trutta Muscle... 

The crustacean Gammarus lacustris can be regarded as a valid indicator of changes in the pH of a lake environment. It can, in fact, survive in water with a pH below 6.0. The bottom limit for Asellus acquaticus, on the other hand, is 5.0. 

Daphnids, Daphnia magna, D. pulex, D. pulicaria Amphipods, Gammarus lacustris, G. fasciatus,... 

As already pointed out in the introduction, many peracarid species adjust their behavior and habitat preferences when chemical cues reveal the presence of predators (e.g., Baumgartner et al. 2003 see Hazlett, Chap. 18). Besides cues from predators themselves, substances leaking from crushed conspecifics also induce antipredator behavior in the amphipod Gammarus lacustris (Wisenden et al. 2001). Although less effective, cues from closely related species had similar behavioral effects (Wisenden et al. 1999). 

Wisenden BD, Pohlman SG, Watkin EE (2001) Avoidance of conspecific injury-released chemical cues by free-ranging Gammarus lacustris (Crustacea Amphipoda). J Chem Ecol 27 1249-1258... 

Wudkevich, K., Wisenden, B.D. Smith, R.J.F. 1997. Reactions of Gammarus lacustris (Amphipoda) to chemical stimuli from natural predators and injured conspecifics. J. Chem. Ecol. 23, 1163—1173. 

Crustaceans are absent from acid waters Gammarus lacustris is not found below pH 6 and Asellus aquaticus becomes very rare below pH 5.2. Freshwater crayfish species are sensitive to low pH while moulting, calcium uptake being inhibited at pH 5.3. 

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