SPAWNING FREQUENCY AND BATCH FECUNDITY OF JACK MACKEREL, TRACHURUS SYMMETRICUS, OFF CALIFORNIA DURING 1991

Abstract

In southern California waters, during MarchApril 1991, the average mature female jack mackerel, Truchurus symmetricus, spawned every 5 days, and eight percent of the females spawned at 1-3 day intervals. The average relative batch fecundity was 112 oocytes per gram female weight (without ovary). Batch fecundity was lower for females that had spawned within the last 3 days than for females in which no evidence existed for a previous spawning. RESUMEN En aguas de California sur, durante Mano-Abril