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Lactate formation in Callianassa californiensis and Upogebia pugettensis (Crustacea: Thalassinidea)
Authors:A W Pritchard  S Eddy
Institution:(1) Department of Zoology, Oregon State University, Corvallis, Oregon, USA;(2) Marine Science Center, Oregon State University, Newport, Oregon, USA
Abstract:The ability to accumulate lactate as a result of laboratory exposure to anoxia was examined in 2 species of mud-dwelling shrimp, the ghost shrimp Callianassa californiensis and the mud shrimp Upogebia pugettensis. Hemolymph lactate accumulated to a much greater degree in the mud shrimp, even though the overall levels of lactate dehydrogenase activity were similar in tissues of the two species. Carbohydrate reserves, estimated as glycogen, were not significantly depleted in muscle or midgut gland of either species as a result of anoxic stress. The results are discussed in relation to possible metabolic strategies employed to cope with the hypoxic environment of these crustaceans.
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