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espanolSe examino la variabilidad en la distribucion espacial y temporal de los estados tempranos del mote Normanichthys crockeri en el ecosistema de surgencias de Chile central, utilizando la informacion de una serie de seis cruceros oceanograficos, crecimiento larval basado en otolitos, y experimentos de desarrollo embrional. Los adultos desovan durante todo el ano en aguas superficiales cerca de peninsulas y dentro de bahias a lo largo de Chile central, reduciendo la adveccion costa afuera. Se observaron densidades de huevos de 16-788 10 m-2. Eclosionan larvas pequenas (~2,7 mm de longitud corporal) alimentadas endogenamente por 6 dias. Las larvas en pre y postflexion de N. crockeri se retienen sobre la plataforma continental o cerca de la costa, y estan ubicadas verticalmente en la capa de mezcla de la columna de agua. No se detecto evidencia de migracion vertical diurno-nocturna en las larvas durante primavera y verano. Las larvas de N. crockeri mostraron tasas de crecimiento lineal de 0,15-0,20 mm dia-1 en los primeros tres meses de vida durante primavera y verano. Comparada con las tacticas reproductivas de otros peces pelagicos menores del area (Engraulis ringens y Strangomera bentincki), N. crockeri coincidio espacialmente en las areas de desove, aunque las larvas presentaron tasas de crecimiento mas lentas. EnglishThe variability of spatial and temporal distribution of early stages of the mote sculpin Normanichthys crockeri from the upwelling ecosystem off central Chile was examined using a series of six oceanographic cruises, otolith-based larval growth, and experimental trials. Adults spawned year-round in surface waters near capes and inside bays along central Chile, which reduced offshore advection. Egg densities of 16-788 10 m-2 were observed. Small larvae (~2.7 mm body length) hatched after a few days and fed endogenously for 6 days. Pre and postflexion larval N. crockeri were retained over the shelf and near the coast and were vertically located in the mixed layer of the water column (from surface to ~ 50 m depth). No evidence of diel vertical migration was detected in larvae during the austral spring and summer seasons. N. crockeri larvae showed linear growth rates of 0.15-0.20 mm day-1 in the first three months of life during spring and summer. Compared with the reproductive tactics of other small pelagic fishes from the area (Engraulis ringens and Strangomera bentincki), N. crockeri shared the same spawning areas; however larvae showed slower growth rate.

revista de biología marina y oceanografía

Distribution patterns, larval growth and hatch dates of early stages of the mote sculpin Normanichthys crockeri (Scorpaeniformes, Normanichthyidae) in the upwelling ecosystem off central Chile