Metadata for tab "Sperm_count" Column Entry Unit Explanatation A Block Experimental block number (1-18) B Male Focal male ID (1-18) C Female Focal female ID (1-18) D Replicate Cross replicate number (1 or 2) E pH pH treatment (ambient or low) F Count_total Count (positive integer) Number of sperm accumulated after chemotaxis trials G Sample A unique ID for each sample (to account for overdispersion) Metadata for tab "Fertilisation_rate" Column Entry Unit Explanatation A Block Experimental block number (1-18) B Male Focal male ID (1-18) C Female Focal female ID (1-18) D Replicate Cross replicate number (1 or 2) E pH pH treatment (ambient or low) F Success Count (positive integer) Number of fertilised eggs G Failure Count (positive integer) Number of unfertilised eggs H Total Count (positive integer) Total number of eggs haphazardly counted I Sample A unique ID for each sample (to account for overdispersion) Metadata for tab "Seawater_carbonate_chemistry" Column Entry Unit Explanatation A Block Experimental block number (1-18) B Treatment pH treatment (ambient or low) C pH pH units (numerical, 0-14) pH on the total scale (calculated via calibration against Tris buffer) of the seawater sample D Temp_pH Degrees Celcius (numerical) Temperature during pH measurement for the seawater sample E Salinity Practical Salinity Units (psu, equivalent to g/kg; numerical) Salinity of the seawater sample F TA umol/kg (numerical) Total alkalinity of the sewater sample