Author： SCHOWALTER T. D. CROSSLEY D. A.
Publisher： Entomological Society of America
ISSN： 1938-2901
Source： Annals of the Entomological Society of America, Vol.75, Iss.2, 1982-03, pp. : 158-160
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Abstract
This paper describes rates of Chromium-51 and Strontium-85 assimilation and bioelimination by the hissing cockroach, Gromphadorhina portentosa (schaum), when the symbiotic mite, Gromphadorholaelaps schaeferi Till, was present or removed. Mite-infested cockroaches had significantly higher rates of 51 Cr elimination relative to mite-free cockroaches, implying more rapid gut clearance times. We did not find a significant mite effect on 85Sr elimination by the host, but mite effects could have been masked by the apparently unique process of nutrient assimilation and elimination by G. portentosa. Conventional models of radioactive tracer bioelimination predict a rapid initial loss of tracer due to gut clearance, followed by a slower loss due to excretion of assimilated tracer. Our results indicated that assimilated 85Sr was eliminated earlier than unassimilated 85Sr was lost by defecation
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