Environmental Biology of Fishes

, Volume 20, Issue 3, pp 169–181

Age and growth estimates of the bull shark, Carcharhinus leucas, from the northern Gulf of Mexico

Authors

  • Steven Branstetter
    • Department of Wildlife and Fisheries SciencesTexas A&M University
  • Robert Stiles
    • Department of BiologySamford University
Article

DOI: 10.1007/BF00004952

Cite this article as:
Branstetter, S. & Stiles, R. Environ Biol Fish (1987) 20: 169. doi:10.1007/BF00004952
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Synopsis

Length at age and growth rates for 59 bull sharks, Carcharhinus leucas, collected from the northern Gulf of Mexico were estimated from the band patterns formed seasonally in the vertebral centra. The combined age at length data for both sexes were applied to a von Bertalanffy growth model producing parameter estimates of L = 285 cm TL, K = .076, t0 = −3.0 yr. Lengths at age for males and females were similar except that males did not attain as great a length as females. Growth was apparently slow and varied among individuals, but in general, was estimated to be 15–20 cm yr−1 for the first five years, 10 cm yr−1 for years 6–10, 5–7 cm yr−1 for years 11–16, and less than 4–5 cm yr−1 thereafter. Males mature at 210–220 cm TL or 14–15 yr of age; females mature at>225 cm TL or 18+ yr of age. The largest male (245 cm TL) was 21.3 yr old; the largest female (268 cm TL) was 24.2 yr old.

Key words

ChondrichthyesElasmobranchsCarcharhinidaeAgeing methodsGrowthVertebral bandsLife history

Copyright information

© Dr W. Junk Publishers 1987