Naive, full-sibling juveniles of Xenopus laevis laevis were exposed to 10, 30, or 50 larvae of the monogenean Protopolystoma xenopodis from an isolate known to produce relatively low adult establishment (typically less than 25% prevalence) in hosts of the same pedigree. Postlarval survival (worms per host) 7 days postinfection (PI), timing from the end of a 10-day infection window, was significantly related and proportional (∼31%) to infection dose. Establishment of newly mature adults 90 days PI was low (0–3 worms/host) and unrelated to infection dose. Results confirm that postlarval mortality is severe in primary infections, and that surviving adult infrapopulations appear to be regulated to a very low level (most often 1 worm/host), even at relatively high larval infection pressures. This density-dependent process could involve direct antagonistic parasite–parasite interactions or indirect interference mediated by parasite-induced host defenses.
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October 2003
Research Article|
October 01 2003
DENSITY DEPENDENCE OF POSTLARVAL SURVIVORSHIP IN PRIMARY INFECTIONS OF PROTOPOLYSTOMA XENOPODIS
Joseph A. Jackson;
Joseph A. Jackson
School of Biological Sciences, University of Bristol, Bristol BS8 1UG, U.K. joejackson67@hotmail.com
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Richard C. Tinsley
Richard C. Tinsley
School of Biological Sciences, University of Bristol, Bristol BS8 1UG, U.K. joejackson67@hotmail.com
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J Parasitol (2003) 89 (5): 958–960.
Citation
Joseph A. Jackson, Richard C. Tinsley; DENSITY DEPENDENCE OF POSTLARVAL SURVIVORSHIP IN PRIMARY INFECTIONS OF PROTOPOLYSTOMA XENOPODIS. J Parasitol 1 October 2003; 89 (5): 958–960. doi: https://doi.org/10.1645/GE-3132
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