Palaemon

A remarkable indirect strategy for chemical defense is found in embryos of the shrimp Palaemon macrodactylusy which are resistant to infection by the pathogenic fungus Lagenidium callinectesy a known pathogen of many crustaceans. This resistance is caused by bacteria on the surface of the embryos... 

Half-time persistence of zinc in the prawn (Palaemon elegans) is about 17 days (Nugegoda and Rainbow 1988b), and between 30 and 270 days for five other crustacean species (NAS 1979). Differences in half-time persistence are finked to differences in excretion rates of ionic zinc and complexed zinc. In general, ionic zinc in crustaceans is excreted first, then complexed zinc surface-adsorbed zinc is turned over faster than internally adsorbed zinc molting accounts for 33 to 50% loss of the total body burden in crabs (Eisler 1981). 

Devineau, J. and C. Amiard Triquet 1985. Patterns of bioaccumulation of an essential trace element (zinc) and a pollutant metal (cadmium) in larvae of the prawn Palaemon serratus. Mar. Biol. 86 139-143. Dib, A., J.P Clavel, and J.P. Carreau. 1989. Effects of gamma-linolenic acid supplementation on lipid composition of liver microsomal membranes. I. Pregnant rats fed a zinc-deficient diet and those fed a balanced one. Jour. Clin. Biochem. Nutr. 6 95-102. 

Nugegoda, D. and P.S. Rainbow. 1987. The effect of temperature on zinc regulation by the decapod crustacean Palaemon elegans Rathke. Ophelia 27 17-30. 

Lucu, C. and M. Skreblin. 1981. Evidence of the interaction of mercury and selenium in the shrimp Palaemon elegans. Mar. Environ. Res. 5 265-274. 

Taylor, A.C. and Spicer, J. I., Metabolic responses of the prawns Palaemon elegans and P. serratus (Crustacea Decapoda) to acute hypoxia and anoxia, Mar. Biol., 95, 521, 1987. 

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