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- W2079800788 abstract "Parasites produce from just a few to many eggs of variable size, but our understanding of the factors driving variation in these two life history traits at the intraspecific level is still very fragmentary. This study evaluates the importance of performing multilevel analyses on egg number and egg size, while characterising parasite life history strategies. A total of 120 ovigerous females of Octopicola superba (Copepoda: Octopicolidae) (one sample (n = 30) per season) were characterised with respect to different body dimensions (total length; genital somite length) and measures of reproductive effort (fecundity; mean egg diameter; total reproductive effort; mean egg sac length). While endoparasites are suggested to follow both an r- and K-strategy simultaneously, the evidence found in this and other studies suggests that environmental conditions force ectoparasites into one of the two alternatives. The positive and negative skewness of the distributions of fecundity and mean egg diameter, respectively, suggest that O. superba is mainly a K-strategist (i.e. produces a relatively small number of large, well provisioned eggs). Significant sample differences were recorded concomitantly for all body dimensions and measures of reproductive effort, while a general linear model detected a significant influence of season*parasite total length in both egg number and size. This evidence suggests adaptive phenotypic plasticity in body dimensions and size-mediated changes in egg production. Seasonal changes in partitioning of resources between egg number and size resulted in significant differences in egg sac length but not in total reproductive effort. Evidence for a trade-off between egg number and size was found while controlling for a potential confounding effect of parasite total length. However, this trade-off became apparent only at high fecundity levels, suggesting a state of physiological exhaustion." @default.
- W2079800788 created "2016-06-24" @default.
- W2079800788 creator A5015630746 @default.
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- W2079800788 date "2014-03-01" @default.
- W2079800788 modified "2023-09-24" @default.
- W2079800788 title "Egg number–egg size: an important trade-off in parasite life history strategies" @default.
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- W2079800788 doi "https://doi.org/10.1016/j.ijpara.2013.10.009" @default.
- W2079800788 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/24462500" @default.
- W2079800788 hasPublicationYear "2014" @default.
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