Spawning-ripe sand lance were collected from SBNMS (42\u00b0 9' 58.26'' N, 70\u00b0 18' 44.19'' W) on 2 December 2016 and 22 November 2017, using a 1.3 \u00d7 0.7 m beam trawl (6 mm mesh) towed at 3 knots for 15 minutes.
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We tested factorial combinations of three pCO2 \u00d7 three temperature levels. The target for pCO2 controls was 400 \u00b5atm (~8.15 pHNIST), a level characteristic of the average open ocean and of the A. dubius spawning habitat in late fall (Salisbury & J\u00f6nsson, 2018). As contrasts, we chose 1,000 \u00b5atm (~7.78 pH) and 2,100 \u00b5atm (~7.48 pH), which correspond to predicted average ocean pCO2 levels by the years 2100 and 2300, respectively.
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Response traits: Sub-sampled hatchlings were measured for two body size metrics; standard length, somatic body area (nearest 0.01 mm2), and two measures of remaining endogenous energy reserves; yolk sac area (nearest 0.001 mm2), and oil globule area (nearest 0.001 mm2).
Data processing: Data were cross-checked with hand-written notes, checked for outliers/erroneous entries/numbers.
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BCO-DMO Data Processing:
\n-\u00a0modified parameter names (replaced spaces with underscores)
\n-\u00a0converted latitude and longitude from degrees, minutes, seconds to decimal degrees
\n-\u00a0reformatted date from mm/dd/yyyy to yyyy-mm-dd
\n-\u00a0replaced \"n/a\" with \"nd\" (no data).