Reproduction biology of Liza aurata (Risso, 1810), (Pisces Mugilidae) in the lagoon of Klisova (Messolonghi, W. Greece)

A study was made of the reproductive biology of Liza aurata (Pisces Mugilidae) from a local population in the lagoon of Klisova (Messolonghi, W. Greece), which revealed fundamental information about reproduction dynamics of this species. Gonadosomatic Index (GSI%) values were highest in September for both sexes and maintained this level from August-November. It was inferred that the spawning period extends through these months taking place in the sea, as all riping fish leave the lagoon in a seaward migration. First maturation occurred at age 1+ for both sexes. Fish of age 1+ comprised the greatest portion of spawners following by ages 2+ and 3+. Absolute fecundity varied from a minimum of 80 000 for age 1+ to a maximum of l 410 000 eggs for age 7+. The absolute fecundity relations to fish total weight and total length were best described by the following exponential equations: F = 531 528 Ln(TW) - 3E + 06 and F = 2E + 06 Ln(TL) - 6E + 06, respectively. Fecundity-age relation was best described by the polynomial equation: F = 18 824A2 + 22 139A + 176 467. (C) 2000 Elsevier Science B.V.