Intraspecific conflict over host manipulation between different larval stages of an acanthocephalan parasite
| Autor: | Elsa Léger, Thierry Rigaud, Sébastien Motreuil, Marie-Jeanne Perrot-Minnot, Lucile Dianne, Alexandre Bauer |
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| Rok vydání: | 2010 |
| Předmět: |
0106 biological sciences
0303 health sciences biology Ecology Host (biology) media_common.quotation_subject Intermediate host Zoology medicine.disease biology.organism_classification 010603 evolutionary biology 01 natural sciences Competition (biology) Intraspecific competition 03 medical and health sciences Gammarus pulex Coinfection medicine Parasite hosting Pomphorhynchus laevis Ecology Evolution Behavior and Systematics 030304 developmental biology media_common |
| Zdroj: | Journal of Evolutionary Biology. 23:2648-2655 |
| ISSN: | 1010-061X |
| DOI: | 10.1111/j.1420-9101.2010.02137.x |
| Popis: | Competitive interactions between coinfecting parasites are expected to be strong when they affect transmission success. When transmission is enhanced by altering host behaviour, intraspecific conflict can lead to ‘coinfection exclusion’ by the first-in parasite or to a ‘sabotage’ of behavioural manipulation by the youngest noninfective parasite. We tested these hypotheses in the acanthocephalan parasite Pomphorhynchus laevis, reversing phototaxis in its intermediate host Gammarus pulex. No evidence was found for coinfection exclusion in gammarids sequentially exposed to infection. Behavioural manipulation was slightly weakened but not cancelled in gammarids infected with mixed larval stages. Therefore, coinfecting infective and noninfective larvae both suffered competition, potentially resulting in delayed transmission and increased risk of mortality, respectively. Consequently, noninfective larva is not just a ‘passive passenger’ in the manipulated host, which raises interesting questions about the selective pressures at play and the mechanisms underlying manipulation. |
| Databáze: | OpenAIRE |
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