|Age and growth of king and Spanish mackerel larvae and juveniles from the Gulf of Mexico and U.S. South Atlantic Bight|
De Vries, D.A.; Grimes, C.B.; Lang, K.L.; White, D.B. (1990). Age and growth of king and Spanish mackerel larvae and juveniles from the Gulf of Mexico and U.S. South Atlantic Bight. Environ. Biol. Fish. 29(2): 135-143
In: Environmental Biology of Fishes. Junk: The Hague. ISSN 0378-1909; e-ISSN 1573-5133
Biological age; Groei; Juvenielen; Ontwikkelingsfases; Vislarven; Scomberomorus cavalla (Cuvier, 1829) [WoRMS]; Scomberomorus maculatus (Mitchill, 1815) [WoRMS]; Marien
|Auteurs|| || Top |
- De Vries, D.A.
- Grimes, C.B.
- Lang, K.L.
- White, D.B.
Sagtittal otoliths from 50 king mackerel (Scomberomorus cavalla) 2.9-13.0 mm SL and 72 Spanish mackerel (Scomberomorus maculatus) 2.8-22.0 mm SL collected off the southeast U.S. were examined whole at 400 x using a compound microscope-video system. Otoliths of both species had visible, presumably daily, growth increments as well as finer subdaily increments. Otolith growth was directly proportional to growth in standard length for king (r2 = 0.91) and Spanish mackerel (r2 = 0.86). Spanish mackerel were estimated to be 3-15 d old with a mean absolute growth rate (SL/number of growth increments) and 95% confidence interval of 1.15 plus or minus 0.07 mm/d. The least squares linear equation: SL = - 1.30 + 1.31 (age in days), with r2 = 0.67 and p > 0.001, described the relationship between length and age. There was a significant positive relationship between absolute growth rate and fish length. King mackerel were estimated to be 3-15 d old with a mean absolute growth rate of 0.89 plus or minus 0.06 mm/d. Growth rate of king mackerel was slightly higher for fish from the Mississippi River plume than from all other locations combined, while Spanish mackerel growth rates were not significantly different.