Biological and fishery-related observations on jack mackerel, Trachurus declivis (Jenyns, 1841) stock during spawning of south-east Australia
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Gąsior,W.
Kompowski,A.
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Pensoft Publishers
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Modal individual length in a spawning population of Trachurus declivis observed was 31 cm. Age groups III and V were found to dominate in the stock. The following parameters of the von Bertalanffy growth equation were estimated: L∞ = 47.18 cm; K = 0.166; to = -1.966 yr. Total mortality (F + M) was 0.343, 0.397, or 0.453 depending on the estimation method adopted and length at first capture assumed. The stock contained more males than females.