LANGUAGE
ES / EN
SUBMIT ARTICLE

BACK TO TABLE OF CONTENTS Volume 46

ISSUE 3

Previous

Variabilidad espacial en la estructura de la ictiofauna asociada a praderas de Cymodocea nodosa en las Islas Canarias, Atlántico nororiental subtropical

Next

Evidencias de desacople físico-biológico en el sistema de surgencia en La Guajira, Caribe colombiano

ARTICLE

Eggs and larvae of anchoveta Engraulis ringens off northern Chile during the 1997-1998 El Niño event

Authors

CORRESPONDING

Pablo M. Rojas

pablo.rojas@ifop.cl

1

1

División de Investigación en Acuicultura, Instituto de Fomento Pesquero (IFOP), Balmaceda 252, Casilla 665, Puerto Montt, Chile

Mauricio F. Landaeta

2

2

Laboratorio de Ictioplancton (LABITI), Facultad de Ciencias del Mar y de Recursos Naturales, Universidad de Valparaíso, Casilla 5080, Viña del Mar, Chile

Raúl Ulloa

3

3

Universidad Autónoma de Nayarit, Postgrado Ciencias Biológicas Agropecuarias y Pesqueras, Ciudad de la Cultura Amado Nervo, CP 63000, Tepic, Nayarit, México

Abstract

The impact of the El Niño event (1997-1998) on the spatial dynamics as well as on the changes in the aggregation patterns of anchoveta eggs and larvae due to the alteration in the thermal anomalies were analyzed. Six bio-oceanographic surveys were carried out in northern Chile from Arica (18°29’S, 70°19’W) to Antofagasta (23°38’S, 70°24’W) over different periods (before and during) of the 1997-1998 El Niño event. Changes in the vertical distribution and aggregation patterns of anchoveta in early life stages were registered as well as an increase in zooplankton biomass with the arrival of El Niño; moreover, the spatial distribution of anchoveta was altered due to the gradually poleward displacement of spawning areas as a result of the arrival of subtropical warm waters from the north. The increase in zooplankton biomass linked to a change in the species composition suggests a negative impact on the anchoveta larval feeding. Our results suggest that abrupt changes in the environment would have immediate consequences on the spatial distribution of anchoveta in early life stages, causing a potential impact on the recruitment of this small pelagic fish in the Humboldt Current System off northern Chile.

Key words

Chile-Humboldt Current System, fish larvae, thermal anomaly, coastal upwelling, zooplankton

DOWNLOAD ARTICLE

(Tamaño 2.7 MB)

DOWNLOAD RESOURCES

DOWNLOADS COUNT

57