Data from: Maternal age effects on offspring lifespan and reproduction vary within a species
Data files
Apr 17, 2024 version files 266.47 KB
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neonates.csv
92.47 KB
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README.md
2.42 KB
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rep_period.csv
92.47 KB
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survival.csv
79.12 KB
Abstract
Across diverse taxa, offspring from older mothers have decreased lifespan and fitness. Little is known about the extent to which maternal age effects vary among genotypes for a given species, however, except for studies of a few arthropod species. To investigate the presence and degree of intraspecific variability in maternal age effects, we compared lifespan, reproductive schedule, and lifetime reproductive output of offspring produced by young, middle-aged, and old mothers in four strains of rotifers in the Brachionus plicatilis species complex. We found significant variability among strains in the magnitude and direction of maternal age effects on offspring life history traits. In one strain, offspring of young mothers lived 20% longer than offspring of old mothers, whereas there were no significant effects of maternal age on lifespan for other strains. Depending on strain, advanced maternal age had positive effects, negative effects, or no effect on lifetime reproductive output. Across strains, older mothers produced offspring that had higher maximum daily reproduction early in life. Effects of maternal age on offspring vital rates could not be explained by changes in trade-offs between lifespan and reproduction. This study documents intraspecific variability in maternal age effects in an additional clade. Investigating intraspecific variability is critical for understanding the ubiquity of maternal age effects and their role in the evolution of life history and aging.
https://doi.org/10.5061/dryad.b2rbnzspp
Description of the data and file structure
Details for raw data files:
‘survival.csv’ contains survivorship data over time.
There is a column for each day of the experiment (1-28), and each row contains data for a single individual.
‘1’ indicates that the individual was alive on that day
‘0’ indicates that the individual was dead on that day
‘NA’ indicates that the individual was lost, due to issues with transferring, or other mistakes (we do not know the survivorship status)
The ‘censor’ column indicates whether or not the event of interest (death) occurred within the experiment timeframe. ‘1’ indicates that death was observed, ‘0’ indicates that death was not observed, therefore that individual is censored.
Variables include:
‘generation’ : F0, F1
‘maternal_age’ : young, mid, and old - only applies to the F1 generation
‘strain’ : RUS, RUS-RE, L5, and BpL1 (different strains of Brachionus rotifers - see publication for more details on each strain)
‘plate’ : plate number
‘well’ : well label (together with the plate number, forms the individual rotifer ID)
‘neonates.csv’ contains the number of neonates produced per individual, per day, over time.
This file has the same general format as the ‘survival.csv’ file. It also has the same ‘censor’ column.
Numeric values are counts of neonates produced per day.
‘NA’ indicates that neonate production could not be observed, either because the individual had died, or was lost.
‘rep_period.csv’ contains reproductive status of mothers over time.
This file has the same general format as the ‘survival.csv’ file. It also has the same ‘censor’ column.
‘1’ indicates that the individual was bearing eggs on that day
‘0’ indicates that the individual was not bearing eggs on that day
‘NA’ indicates that egg-bearing status could not be observed, either because the individual had died, or was lost.
Sharing/Access information
Links to other publicly accessible locations of the data: