Acute CO2 tolerance during the early developmental stages of four marine teleosts

• Published in: Environmental toxicology Vol. 18; no. 6; pp. 375 - 382
• Main Authors: Kikkawa, T., Ishimatsu, A., Kita, J.
• Format: Journal Article
• Language: English
• Published: Hoboken Wiley Subscription Services, Inc., A Wiley Company 01.12.2003; Wiley
• Subjects: Agnatha. Pisces; Animal, plant and microbial ecology; Animals; Applied ecology; Biological and medical sciences; carbon dioxide; Carbon Dioxide - toxicity; CO2 ocean sequestration; CO2 toxicity; early development; Ecotoxicology, biological effects of pollution; Effects of pollution and side effects of pesticides on vertebrates; Embryonic Development; Fishes - embryology; Fishes - growth & development; Fundamental and applied biological sciences. Psychology; Greenhouse Effect; Larva - growth & development; Marine and brackish environment; marine fish; Seawater - chemistry; Survival Analysis; CO2 ocean sequestration; Pagrus major; Toxicity; Interspecific comparison; Mortality; Carbon dioxide; Tolerance; Experimental study; Young animal; Marine environment; Vertebrata; early development; Larva; marine fish; Pisces; Water pollution; Developmental stage; Paralichthys olivaceus; CO2 toxicity
• ISSN: 1520-4081; 1522-7278
• DOI: 10.1002/tox.10139

Ocean sequestration of CO2 is proposed as a possible measure to mitigate climate changes caused by increasing atmospheric concentrations of the gas, but its impact on the marine ecosystem is unknown. We investigated the acute lethal effect of CO2 during the early developmental stages of four marine teleosts: red sea bream (Pagrus major), Japanese whiting (Sillago japonica), Japanese flounder (Paralichthys olivaceus), and eastern little tuna (Euthynnus affinis). The percentages of larvae that hatched and survived were not affected by exposure to water with a PCO2 of 1.0 kPa (= 7.5 mmHg) within 24 h. Median lethal PCO2 values for a 360‐min exposure were 1.4 kPa (cleavage), 5.1 kPa (embryo), 7.3 kPa (preflexion), 4.2 kPa (flexion), 4.6 kPa (postflexion), and 2.5 kPa (juvenile) for red sea bream; 2.4 kPa (cleavage), 4.9 kPa (embryo), 5.9 kPa (preflexion), 6.1 kPa (flexion), 4.1 kPa (postflexion), and 2.7 kPa (juvenile) for Japanese whiting; 2.8 kPa (cleavage) and > 7.0 kPa (young) for Japanese flounder; and 11.8 kPa (cleavage) for eastern little tuna. Red sea bream and Japanese whiting of all ontogenetic stages had similar susceptibilities to CO2: the most susceptible stages were cleavage and juvenile, whereas the most tolerant stages were preflexion and flexion. © 2003 Wiley Periodicals, Inc. Environ Toxicol 18: 375–382, 2003