Alternate Title

Age, Growth, and Mortality of Blue Runner, Caranx crysos, from the Northern Gulf of Mexico

Authors

James M. Goodwin IV, National Marine Fisheries Service
Allyn G. Johnson, National Marine Fisheries ServiceFollow

Abstract

Estimates of age, growth, and mortality for blue runner obtained from commercial fisheries in northwest Florida and the Mississippi delta were developed using otolith sections. The oldest fish was 11 years old, the largest was 460 mm fork length. Mean back-calculated fork lengths varied from 212 mm at age 1 to 422 mm at age 11. The von Bertalanffy equation for combined sexes was FL_t = (1-e^{-0.35(t + 1.07)}) where FL = fork length (mm) and t = age (years). Regression equations for the interconversion of fork length (FL), standard length (SL), and total length (TL) were:

TL = -7.4792 + FL (1.1938), (r = 1.00, α = 0.01),
FL = 1.9453 + SL (1.0596), (r = 1.00, α = 0.01), and
TL = -5.1694 + SL (1.2651), (r = 0.99, α = 0.01).

The weight·length relationship for combined sexes was W = 0.0000251355 FL 2.94593 (N = 193, r = 0.98, α = 0.01) where W = whole body weight in grams and FL = fork length in millimeters. Estimates of annual mortality, determined by four methods, ranged from 0.41 to 0.53.

DOI Link

https://doi.org/10.18785/negs.0802.02

Recommended Citation

Goodwin, J. M. IV and A. G. Johnson. 1986. Age, Growth, and Mortality of Blue Runner, Caranx crysos, from the Northern Gulf of Mexico. Northeast Gulf Science 8 (2).
Retrieved from https://aquila.usm.edu/goms/vol8/iss2/2