DIFFERENCES IN REPRODUCTIVE BROODSTOCK PERFORMANCE AND EGG QUALITY OF WILD-CAUGHT AND FIRST -GENERATION DOMESTICATED Seriola rivoliana REARED UNDER SAME CULTURE CONDITIONS

Abstract

Almaco jack, Seriola rivoliana as related species have a big interest in marine fish aquaculture, although there is a lack of reproductive studies in captivity. In this study, reproductive performance and egg quality in two groups of Seriola rivoliana adult, wild caught and domesticated-F1, reared under optimal maturation conditions in a commercial private Laboratory were analyzed and compared. A total of 28 wild adult (>5 Kg) were caught at La Paz Bay, Baja California Sur, Mexico and 30 adult domesticated- F1 broodstock (>5 Kg), were obtained from an original stock of 1,000 juveniles (3.5g body weight) produced at Kona Blue (Hawaii, USA) sea farm and transported to the Rancheros del Mar commercial private hatchery where fish were grown to adult size. The groups were evaluated during 8 months (from May to December 2012) and compared in terms of reproduction performance (total number of spawning events, spawning frequency per month, total number of eggs, total number of eggs per mL, and fertilization rate), egg biochemical composition (total proteins, total lipids, total carbohydrates, and triacylglycerides) and egg diameter . Higher fertilization rate, total number of spawning, monthly spawning frequency and total number of eggs produced), were obtained by wild caught broodstock group and significant differences (p Biochemical composition and egg diameter did not shown statistical differences (p