Rhithropanopeus harrisii

Andreev NI, Andreeva SI (1988) Crab Rhithropanopeus harrisii tridentatus (Decapoda, Xanthidae) in the Aral Sea. Zoological Journal 67(1) 135—136 (in Russian)... 

In many crustaceans, females carry their young until the larvae hatch in unison with the female contracting its abdomen rapidly, a behavior known as the pumping response. Forward et al. (1987) identified tri-peptides from the eggs of the mud crabs (Rhithropanopeus harrisii) that induced this stereotypical hatching behavior and found the peptide to work at extremely low concentrations (Pettis et al. 1993). 

Organotin, diorganotins, triorganotins, quantitative structure activity relationships, OSAR, LC50, chronic toxicity, aquatic toxicology, response surface analysis, Rhithropanopeus harrisii. 

Zoeae of the mud crab, Rhithropanopeus harrisii were exposed to a set of structurally distinct organotin compounds consisting of 7 di- and 8 trior-ganotins (TABLE 1). Most are commercially available but several were synthesized specifically for these studies. Selection was additionally based upon an attempt to choose compounds with a range of physico-chemical properties, and whose ligands would differently influence the electronic character of the tin atom. 

TABLE 1 Organotins tested, their LC50 concentration to zoeal mud crabs (Rhithropanopeus harrisii) and their correlation co-efficients used in QSAR models. ZFp and n parameter values from Hansch and Leo (1979). Total surface area (TSA) calculated as described in text. 

FIGURE 1 Plot of the and Hansch tt parameters versus toxicity of triorganotin compounds to mud crab larvae, (Rhithropanopeus harrisii). From Laughlin et al. (1984). 

FIGURE 5 Correlations between total surface area (TSA) and the LC50 value for mud crab zoeae (Rhithropanopeus harrisii) exposed to triorganotin compounds. Redrawn from Laughlin et al. (1985). 

FIGURE 6 Response surface isopleths showing predicted mortality for mud crab zoeae (Rhithropanopeus harrisii), as a function of exposure concentration and Leo fragment constant, IFp, for diorganotin compounds. 

Costlow, J.D., BookhoutC.G. and Monroe R.J. 1966. Studies on the larval development of the crab Rhithropanopeus harrisii (Gould) I. The effect of salinity and temperature on larval development. Physiol. Zool. 39 81-100. 

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