Data from: Parasitism offers large rewards but carries high risks: predicting parasitic strategies under different life history conditions in lampreys
Evans, Thomas M., SUNY College of Environmental Science and Forestry
Limburg, Karin E., SUNY College of Environmental Science and Forestry
Published Apr 26, 2019 on Dryad.
Cite this dataset
Evans, Thomas M.; Limburg, Karin E. (2019). Data from: Parasitism offers large rewards but carries high risks: predicting parasitic strategies under different life history conditions in lampreys [Dataset]. Dryad. https://doi.org/10.5061/dryad.352385k
The loss of parasitism in metazoan lineages is often seen as unlikely, but it has occurred in some lineages (e.g., leeches, lampreys). How and why parasitism is lost is aptly addressed by studying lampreys, because extant species include a range of feeding modes and parasitism has been lost repeatedly. An individual‐based model was developed to determine if variations in survival and growth rates in the larval and juvenile stages could favor parasitic or non‐parasitic strategies. A realization of the model for a Lampetra spp. population, a genus which includes parasitic and non‐parasitic animals, indicated that both strategies could be successful. A different model realization of the non‐parasitic species Lethenteron appendix also agreed with expectations, only non‐parasitic strategies were successful. Modeling anadromous Petromyzon marinus produced only parasitic animals, as expected, but suggested two different adult sizes should appear in the population, which has not been reported in the literature. Finally, a realization of an Ichthyomyzon castaneus population, only known to produce parasites, rarely selected for parasitism (~7% of model iterations), possibly because the population used to parameterize the model was unusual for the species. The results suggest that non‐parasitism in lampreys is common because parasitism, while offering better growth, also has lower survival. Additionally, non‐parasitic species may be generated at different rates because growth and survival thresholds in the model favoring parasitism are close to observed estimates in some populations. Loss of parasitism can occur when species have different tradeoffs in growth environments between life stages.
Data used to generate life history space figure
The data used to generate the figure showing life history space (Figure 4). Additionally, final adult weight is included. These data were generated by the model used within the paper.
Extant max and min lamprey life histories data
Data used to generate Figure 1, the life history space occupied by lampreys. Values were the minimum and maximum values from Renaud 2011 publication (Lampreys of the world)* for species which were known to be parasitic or non-parasitic. Unusual species, (i.e., dwarf parasitics) were not included in these minimums and maximums to clarify the meaning of the figure, because it is conceptual. *Renaud, Claude. (2011). Lampreys of the World. An Annotated and Illustrated Catalogue of Lamprey Species Known to Date.
Lamprey Life Histories Conceptual Data.csv
Lamprey life history data book
All fecundity data extracted from Renaud's 2011 publication (Lampreys of the world): Renaud, Claude. (2011). Lampreys of the World. An Annotated and Illustrated Catalogue of Lamprey Species Known to Date.
Data for histograms_weight and counts
Data used to generate histograms, which were developed by taking the number of observations at an adult body size generated by each model realization.