Some effects of mermithid parasitism on the larval ...
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| Title | Some effects of mermithid parasitism on the larval blackflies Prosimulium mixtum fuscum and Simulium venustum |
| Author(s) | W. Condon, R. Gordon |
| Journal | Journal of Invertebrate Pathology |
| Date | 1977 |
| Volume | 29 |
| Issue | 1 |
| Start page | 56 |
| End page | 62 |
| Abstract | Histochemical studies in the laboratory in Canada on field-collected larvae of Prosimulium fuscum Syme & Davies (mixtum fuscum) revealed no significant differences in the endocrine activity of larvae infected with mermithid nematodes and healthy larvae (of similar body dimensions). In the case of field-collected larvae of Simulium venustum Say, mermithid parasitism significantly increased the nuclear DNA/RNA activity of the corpus allatum as well as the volume and amount of stored neurosecretory material in the corpus cardiacum. A marked decline in glycogen concentration and amount of fat-body was evident in infected larvae of both simuliid species. Fat-body nucleic-acid activity was unaffected by mermithid parasitism. The significance of the effects of mermithid parasitism is discussed with regard to the host-parasite relationship.ADDITIONAL ABSTRACT:Histochemical studies on field collected larval blackflies showed no significant differences in endocrine activity between Neomesomermis flumenalis-infected and uninfected Prosimulium mixtum fuscum larvae of similar body dimensions. In Simulium venustum, N. flumenalis significantly increased the nuclear DNA/RNA activity of the corpus allatum as well as the volume and amount of stored neurosecretory material in the corpus cardiacum. A marked decline in glycogen concentration and the amount of fat body tissue was evident in both infected simuliids. Fat body nucleic acid activity was unaffected by infection.. |
| ISSN | 0022-2011 |
Using APA 6th Edition citation style.
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