Toxicity of Polychlorinated Biphenyls (Aroclor 1254) on the Earthworm Eisenia foetida

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Objectives were to: (1) assess toxicity of polychlorinated biphenyls on Eisenia foetida, in terms of survival (LC5O/LD5O), and suppression of coelomocytes to form secretory (SR) and erythrocyte rosettes (ER) with, and to phagocytize rabbit erythrocytes; and (2) compare results with those of Lumbricus terrestris to assess relative sensitivities to PCB. Using 5-d filter paper contact exposure protocol, LC50 and LD50 were 30.4 cg/cm2 and 4450 cg/g dry mass, respectively. Nominal PCB exposure concentrations of 5.0 and 10.0 pg/cm2 resulted in tissue levels of 1389 and 2895 pg/g dry mass causing a significant reduction in SR formation by 18 and 52%, ... continued below

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v, 57 leaves : ill.

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Sassani, Rain August 1991.

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This thesis is part of the collection entitled: UNT Theses and Dissertations and was provided by UNT Libraries to Digital Library, a digital repository hosted by the UNT Libraries. It has been viewed 27 times , with 7 in the last month . More information about this thesis can be viewed below.

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  • Sassani, Rain

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Objectives were to: (1) assess toxicity of polychlorinated biphenyls on Eisenia foetida, in terms of survival (LC5O/LD5O), and suppression of coelomocytes to form secretory (SR) and erythrocyte rosettes (ER) with, and to phagocytize rabbit erythrocytes; and (2) compare results with those of Lumbricus terrestris to assess relative sensitivities to PCB. Using 5-d filter paper contact exposure protocol, LC50 and LD50 were 30.4 cg/cm2 and 4450 cg/g dry mass, respectively. Nominal PCB exposure concentrations of 5.0 and 10.0 pg/cm2 resulted in tissue levels of 1389 and 2895 pg/g dry mass causing a significant reduction in SR formation by 18 and 52%, respectively. ER formation and phagocytosis were reduced significantly (52 and 61%) only at the higher tissue concentration. Compared to reported data on lethality and immunomodulation in L. terrestris, E. foetida appears to be more resistant.

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v, 57 leaves : ill.

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UNT Theses and Dissertations

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  • August 1991

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  • March 9, 2015, 8:15 a.m.

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  • Sept. 21, 2017, 11:17 a.m.

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Citations, Rights, Re-Use

Sassani, Rain. Toxicity of Polychlorinated Biphenyls (Aroclor 1254) on the Earthworm Eisenia foetida, thesis, August 1991; Denton, Texas. (digital.library.unt.edu/ark:/67531/metadc500593/: accessed October 18, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; .