Critical Thermal Maximum in embryonic Pacific herring

These data were collected at Shannon Point Marine Center in Washington, U.S.A. in March and May, 2021. Embryos were reared at either 10C (ambient) or 16C (heightened) and at either ~500 pCO2 uatm (ambient) or ~2000 pCO2 uatm (heightened). These data measure the response of winter-spawned Pacific herring embryos to critical thermal maximum excursions (CTmax) up to either 20C or 25C for 1, 2, or 3 hours of exposure. Percent survival was evaluated between rearing temperature and pCO2 level, maximum CTmax temperature, and duration of exposure to CTmax. The results evaluate if rearing conditions affect survival during a marine heatwave and the CTmax temperature and duration at which survival diminishes.


Fisheries and aquaculture


Critical Thermal Maximum, Pacific herring, Ocean Acidification, Temperature Rise, Survival


48.990866N, 48.066899S, -122.353024E, -123.484616W


Fert_date: date of fertilization, unitless

CTmax_date: date of CTmax trials, unitless

hpf: hours post fertilization

age_atCTmax_degreehours: degree hours of embryos at CTmax trials

assessment_date: date of assessment for survival

assessment_age_DD: age (degree days) of embryos during assessment

tank: experimental rearing tank number (1-4)

replicate: replicate cup (1-48)

temp: rearing temperature (10 or 16C)

CO2: rearing pCO2 conditions (uatm)

CTmax_temp: maximum temperature of exposure (0 = control)

duration_hours: 0 (control), 1, 2, or 3 hours of exposure to CTmax temperature

alive: number embryos assessed as alive 

dead: number embryos assessed as dead

moribund: number of embryos assessed at moribund

bad_eggs: eggs not included in survival assessment

percent_survival: alive divided by (alive + dead + moribund)


Critical Thermal Maximum, Pacific herring, March 2021
7 KoCSVProcessed data
Critical Thermal Maximum, Pacific Herring, May 2021
6 KoCSVProcessed data
How to cite
Singh Nicole, Love Brooke, Murray Christopher, Kathryn Sobocinski, Cooper W. James (2021). Critical Thermal Maximum in embryonic Pacific herring. SEANOE.

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