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Acute CO 2 tolerance during the early developmental stages of four marine teleosts
Author(s) -
Kikkawa T.,
Ishimatsu A.,
Kita J.
Publication year - 2003
Publication title -
environmental toxicology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.813
H-Index - 77
eISSN - 1522-7278
pISSN - 1520-4081
DOI - 10.1002/tox.10139
Subject(s) - whiting , pagrus major , fishery , olive flounder , paralichthys , juvenile , biology , tuna , perciformes , zoology , ecology , fish <actinopterygii>
Ocean sequestration of CO 2 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 CO 2 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 P CO 2 of 1.0 kPa (= 7.5 mmHg) within 24 h. Median lethal P CO 2 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 CO 2 : 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