El Niño induced changes of the coastal fish fauna off northern Chile and implications for ichthyogeography

The coastal fringe off northern Chile (18º-23ºS) is inhabited by numerous neritic fish species of which 249 are commonly observed during normal and cold La Niña (LN) conditions. During El Niño (EN) the ichthyofauna of northern Chile changes significantly due to about 100 invading fish species normal...

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Autores principales:	Sielfeld,Walter, Laudien,Jürgen, Vargas,Mauricio, Villegas,Mario
Lenguaje:	English
Publicado:	Universidad de Valparaíso. Facultad de Ciencias del Mar 2010
Materias:	ENSO neritic fishes northern Chile ichthyogeography
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-19572010000400014
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spelling	oai:scielo:S0718-195720100004000142011-04-28El Niño induced changes of the coastal fish fauna off northern Chile and implications for ichthyogeographySielfeld,WalterLaudien,JürgenVargas,MauricioVillegas,Mario ENSO neritic fishes northern Chile ichthyogeography The coastal fringe off northern Chile (18º-23ºS) is inhabited by numerous neritic fish species of which 249 are commonly observed during normal and cold La Niña (LN) conditions. During El Niño (EN) the ichthyofauna of northern Chile changes significantly due to about 100 invading fish species normally inhabiting lower latitudes, named "septentrional invaders" and "tropic-equatorial fishes". This results in a composition including 15 fish families and 86 genera. Analyses showed that species affected by EN were not the same between the last three EN events revealing that only the epipelagic species Anchoa naso, Albula vulpes, Atherinella nocturna and Scomberesox saurus stolatus behaved consistently. Off northern Chile, EN 1982/83, 1986/87, 1991/92, 1997/98, 2002/2003 and the not clearly EN defined 2004/2005 period with their aligned thermal abnormalities of each particular event were directly related to the number of invading/affected species. Most of the alien species (>50%) were epipelagic, 25% were typical for sandy beaches and 14.6% for rocky shores. The shore fish community did not show major changes during and after EN events, as only a few invading species were recorded; just Umbrina xantii was found during all events considered. In order to understand the response of the fish community to ENSO events a biogeographical analyses of 721 fish species reported for neritic habitats (coastal epipelagic and benthic) distributed between 0°-57°S (Gulf of Guayaquil to Cape Horn) was made. Their distribution ranges for normal oceanic conditions were taken from the very numereous existing literature. It is concluded that the north/south migration of Panamic and Peruvian warm water fishes during EN/LN events along the north Chilean coast between 18º-23ºS, indicates that it represents a wide transition zone between the Peruvian and the Chilean ichthyogeographic provinces.info:eu-repo/semantics/openAccessUniversidad de Valparaíso. Facultad de Ciencias del MarRevista de biología marina y oceanografía v.45 suppl.1 20102010-12-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-19572010000400014en10.4067/S0718-19572010000400014
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	ENSO neritic fishes northern Chile ichthyogeography
spellingShingle	ENSO neritic fishes northern Chile ichthyogeography Sielfeld,Walter Laudien,Jürgen Vargas,Mauricio Villegas,Mario El Niño induced changes of the coastal fish fauna off northern Chile and implications for ichthyogeography
description	The coastal fringe off northern Chile (18º-23ºS) is inhabited by numerous neritic fish species of which 249 are commonly observed during normal and cold La Niña (LN) conditions. During El Niño (EN) the ichthyofauna of northern Chile changes significantly due to about 100 invading fish species normally inhabiting lower latitudes, named "septentrional invaders" and "tropic-equatorial fishes". This results in a composition including 15 fish families and 86 genera. Analyses showed that species affected by EN were not the same between the last three EN events revealing that only the epipelagic species Anchoa naso, Albula vulpes, Atherinella nocturna and Scomberesox saurus stolatus behaved consistently. Off northern Chile, EN 1982/83, 1986/87, 1991/92, 1997/98, 2002/2003 and the not clearly EN defined 2004/2005 period with their aligned thermal abnormalities of each particular event were directly related to the number of invading/affected species. Most of the alien species (>50%) were epipelagic, 25% were typical for sandy beaches and 14.6% for rocky shores. The shore fish community did not show major changes during and after EN events, as only a few invading species were recorded; just Umbrina xantii was found during all events considered. In order to understand the response of the fish community to ENSO events a biogeographical analyses of 721 fish species reported for neritic habitats (coastal epipelagic and benthic) distributed between 0°-57°S (Gulf of Guayaquil to Cape Horn) was made. Their distribution ranges for normal oceanic conditions were taken from the very numereous existing literature. It is concluded that the north/south migration of Panamic and Peruvian warm water fishes during EN/LN events along the north Chilean coast between 18º-23ºS, indicates that it represents a wide transition zone between the Peruvian and the Chilean ichthyogeographic provinces.
author	Sielfeld,Walter Laudien,Jürgen Vargas,Mauricio Villegas,Mario
author_facet	Sielfeld,Walter Laudien,Jürgen Vargas,Mauricio Villegas,Mario
author_sort	Sielfeld,Walter
title	El Niño induced changes of the coastal fish fauna off northern Chile and implications for ichthyogeography
title_short	El Niño induced changes of the coastal fish fauna off northern Chile and implications for ichthyogeography
title_full	El Niño induced changes of the coastal fish fauna off northern Chile and implications for ichthyogeography
title_fullStr	El Niño induced changes of the coastal fish fauna off northern Chile and implications for ichthyogeography
title_full_unstemmed	El Niño induced changes of the coastal fish fauna off northern Chile and implications for ichthyogeography
title_sort	el niño induced changes of the coastal fish fauna off northern chile and implications for ichthyogeography
publisher	Universidad de Valparaíso. Facultad de Ciencias del Mar
publishDate	2010
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-19572010000400014
work_keys_str_mv	AT sielfeldwalter elninoinducedchangesofthecoastalfishfaunaoffnorthernchileandimplicationsforichthyogeography AT laudienjurgen elninoinducedchangesofthecoastalfishfaunaoffnorthernchileandimplicationsforichthyogeography AT vargasmauricio elninoinducedchangesofthecoastalfishfaunaoffnorthernchileandimplicationsforichthyogeography AT villegasmario elninoinducedchangesofthecoastalfishfaunaoffnorthernchileandimplicationsforichthyogeography
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El Niño induced changes of the coastal fish fauna off northern Chile and implications for ichthyogeography

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