Life history parameters of chub mackerel (Scomber japonicus) from two areas off Chile

Francisco Cerna, Guido Plaza

Research output: Contribution to journalArticlepeer-review

2 Scopus citations

Abstract

Age, growth, maturity, and natural mortality estimates were made for chub mackerel (Scomber japonicus Houttuyn, 1782) captured off the Chilean Pacific coast. The von Bertalanffy growth parameters for combined sexes from north and central-south areas were L = 36.9 cm, k = 0.22 yr -1, and t0 = -1.35 yrs, and L = 40.0 cm, k = 0.23 yr-1, and t0 = -1.34 yrs, respectively. The spawning period in the northern area ranged from November to February of each year; it was restricted to January and February in the central-south area. The size at maturity (Lm50%) estimated for the north and central south areas, respectively, were 25.1 and 29.6 cm fork length (FL) in males, and 25.9 and 28.1 cm FL in females. Natural mortality was similar in the two areas: 0.45 yr-1 in the north and 0.46 yr-1 in the central-south region. Results support the existence of two stocks off Chile's southeastern coast.

Original languageEnglish
Pages (from-to)833-848
Number of pages16
JournalBulletin of Marine Science
Volume90
Issue number3
DOIs
StatePublished - Jul 2014
Externally publishedYes

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