Growth rates of larval and juvenile bigeye scad Selar crumenophthalmus in captivity

Aaron Welch, Ronald Hoenig, John Stieglitz, Zach Daugherty, Bruno Sardenberg, Sasa Miralao, Dan Farkas, Dan Benetti

Research output: Contribution to journalArticle

3 Scopus citations

Abstract

Growth rates of larval and juvenile bigeye scad Selar crumenophthalmus reared in captivity were studied. The results are presented, discussed, and compared to wild S. crumenophthalmus and other pelagic fish. S. crumenophthalmus are a small pelagic carangid fish of circumtropical distribution. Larvae were reared in a modified mesocosm system and sampled daily for growth. Larvae grew to a mean size of 4.74 cm (Standard Length) and 1.30 g by 45 days post hatch (dph). Larval length-at-age was best described by the exponential equation Y = 1.966e0.0704t. For juvenile growth trials, 1940 fish were stocked into four 2.5 m3 cylindro-conical tanks at two different densities (262 fish m-3 and 120 fish m-3) and reared from 45 dph to subadult stage. Fish were sampled daily for growth. No statistically significant differences in growth or survival were detected between tanks. Mean length and weight at 141 dph was 13.24 cm (Total Length) and 25.20 g. Juvenile length-at-age was best described by the Von Bertalanffy Growth Model equation Lt = 27.75(1 - e-0.03(t-1.57)). Weight-at-age was best described by a linear equation Wt = 1.7313x + 12.4662. The exponent of the length-weight equation was 3.14. In addition to providing the first published description of larviculture and juvenile growout techniques for S. crumenophthalmus, this study contains the first published data on this species' larval growth and directly confirms estimates of S. crumenophthalmus juvenile growth done by other researchers using indirect techniques such as otolith daily growth increment and frequency distribution analysis.

Original languageEnglish (US)
Article number634
Pages (from-to)1-9
Number of pages9
JournalSpringerPlus
Volume2
Issue number1
DOIs
StatePublished - Jan 1 2013

Keywords

  • Larviculture
  • Length-at-age
  • Mean daily growth increment
  • Von Bertalanffy Growth Model
  • Weight-at-age

ASJC Scopus subject areas

  • General

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