https://doi.org/10.5061/dryad.4mw6m90ht

2020-2022 Steatoda grossa: the effects of thermal treatments on egg survival, spiderling development and survival, and adult reproductive success.

• eggs.csv: The first one to four egg sacs from 30 different mothers were collected from each female soon after laying and placed individually in a petri dish. Egg sacs were randomly assigned to the control temperature (22°C, n = 21), one of the two thermal stress treatments (27 °C, n = 21; and 32°C, n = 19), or the standard experimental heatwave treatment (n = 20). We quantified hatching duration (number of days until hatching), hatching success (proportion of eggs that hatched), and the average body mass of spiderlings per egg sac under each of the temperature conditions (22°C, 27°C, 32°C, and the experimental heatwave).

• spiderlings.csv: 25 spiderlings from 32 different mothers were randomly selected from each egg sac, placed individually in a petri dish with a damp cotton ball, and then randomly assigned to one of the following temperature treatments; the control temperature (22°C, n = 150), one of the two thermal stress treatments (27 °C, n = 150; and 32°, n = 150), the standard experimental heatwave treatment (n = 80), the long heatwave (n = 70), the double short heatwave treatment (n = 80), or the double long heatwave treatments (n = 70). Spiderlings that were in heatwave treatments were introduced at day 5 or day 10 after hatching, respectively, in line with the length of tropical days (32°C). All spiders were checked every three weeks, and both body mass and survival (alive vs. dead)were recorded.

Description of the data and file structure

Column Heading Descriptors for File"eggs":

• eggsac_id: unique identifier of the eggsac

• mother_number: identifying number of the female spider who produced the eggsac

• eggsac_number: number of  egg sac produced by the mother (1=first, 2=second…)

• tem_condition: temperature condition code, from 1 to 4: 1=22 °C during the day, 12 °C during  the night;  2=27 °C during the day, 17 °C during  the night; 3=32 °C during the day, 22 °C during the night; 4= heat wave, starting from condition 1 and gradually passing to condition 2 in 3-4 days, then from 2 to 3 in other 3-4 days, then immediately back to 1 until hatching (day/night cycle=16/8)

• oviposition_date: date of oviposition of the egg sac

• eggsac_weight: egg sac weight measured on the oviposition date; unit=mg

• hatch_date: date of hatching of the egg sac

• dead_eggs: number of dead eggs upon hatching

• spiderlings: number of spiderlings hatched from eggs

• hatch_success: percentage of hatched eggs

• mean_spiderling_weight: weight of all spiderlings divided by their number; unit=mg

Column Heading Descriptors for file"spiderling":    

• FeM: ID of female mothers

• Number: ID of spiderlings

• Treatment: temperature condition: 22 refers to  22 °C during the day, 12 °C during the night;  27, 27 °C during the day, 17 °C during he night; 32, 32 °C during the day, 22 °C during the night;1SHW, one time short heat wave; 2SHW, 2 times of short heat wave; 1LHW, 1 time long heat wave; 2LHW, 2 times of long heat wave. Short heat wave is 3 days 27 and 5 days 32, and long heat wave is 10 days 27 and 10 days 32.

• Sex: sexes of spiderlings, the spiderling died before we cacouldistinguish the sex, we marked it as NA

• Birth_date: birth date of the spiderling

• Death_date: death date of the spiderling

• Mature_date: the date when the spiderling reached maturehood; if the spiderling died before maturehood, it is NA; for females, it is bblankk

• WdaysX: body mass weighing after X days from the birth date

• Notes: Whenen a cell is empty, it indicates that no data was collected.