However, because sardine catches are limited to 20 km from the coast, these estimates may be strongly biased since sardines move offshore to spawn during spring to avoid the recently upwelled, colder water nearshore. showed the distribution and relative concentration of eggs in CUFES samples occurring outside the upwelling fronts in spring, parallel to the coast between 50 and 200 km offshore.
En muestras obtenidas con el sistema CUFES en primavera fuera de los frentes de surgencia y paralelos a la costa, mostraron que la distribución y concentración relativa de huevos ocurrió entre 50 y 200 km de la costa.