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Age‐Related Changes in Survival of Larval and Juvenile Striped Bass in Different Concentrations of Calcium and Sodium
Author(s) -
Grizzle John M.,
Mauldin Alfred C.
Publication year - 1994
Publication title -
transactions of the american fisheries society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.696
H-Index - 86
eISSN - 1548-8659
pISSN - 0002-8487
DOI - 10.1577/1548-8659(1994)123<1002:arciso>2.3.co;2
Subject(s) - bass (fish) , juvenile , yolk sac , zoology , biology , larva , sodium , fishery , calcium , yolk , morone saxatilis , survival rate , chemistry , ecology , medicine , embryo , organic chemistry
Survival rates were determined 24 h after striped bass Morone saxatilis from 9 to 78 d old (i.e., days posthatch) were abruptly transferred to water with low or high concentrations of Ca 2+ and Na + . These ions are often added to water containing striped bass to increase survival after harvest. Treatment waters contained these ions at the following levels: (1) low Cat, (4 mg/L) and low Na + (9 mg/L); (2) high Ca 2+ (100 mg/ L) and low Na + ; (3) low Ca 2+ and high Na + (1,780 mg/ L); or (4) high Ca 2+ and high Na + . Survival was consistently high for fish of all ages in the high Cat + –high Na + treatment. However, survival in all other treatments varied depending on fish age. Yolk‐sac larvae (9 d posthatch) had high survival in water with high Na + and had low survival in water with low Na + ; survival of yolk‐sac larvae was not related to Ca 2+ concentration. Survival of the youngest postlarvae tested (16 d posthatch) was remarkably different from that of yolk‐sac larvae; the high concentration of Ca 2+ reduced mortality and the low Ca 2+ –high Na + combination was acutely lethal. In both treatments with low Ca 2+ , there was an increase in survival with age of fish older than 16 d. Fish that were 78 d old had 100% survival in all treatments for 24 h, and after 72 h, survival was 97% or higher in all treatments.