Early life history of the middling thread herring (Opisthonema medirastre) in the central Galápagos Islands

Abstract

The authors estimated life-history parameters of a clupeid forage fish, Opisthonema medirastre, by sampling juveniles over the course of a year in the central region of the Galápagos Islands, Ecuador. They collected 160 juveniles on the south coast of Santa Cruz Island during the wet/warm season that were 16-48 mm standard length, were 30-88 days old, had hatched at the beginning of the wet/warm season and had grown at 0.4 mm day À1 . The results suggest that in Galápagos, O. medirastre reproduce during the wet/warm season mostly under neutral ENSO conditions.