Aspectos bioecológicos del ictioplancton en la estación fija "La Libertad" durante 1997
El presente trabajo se refiere a las variaciones observadas en el ictioplancton presente en la estación fija "La Libertad" desde febrero de 1997 hasta diciembre del mismo año. Los datos se relacionan con las observaciones ecológicas hechas en base a indicadores de masas de agua, formanífer...
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Instituto Oceanográfico de la Armada, Guayaquil, Ecuador
1998
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ftoceandocs:oai:aquadocs.org:1834/2289 2023-05-15T18:00:44+02:00 Aspectos bioecológicos del ictioplancton en la estación fija "La Libertad" durante 1997 Luzuriaga de Cruz, M. Ortega, D. Elías, E. La Libertad, Provincia de Santa Elena, Ecuador 1998 http://hdl.handle.net/1834/2289 es spa Instituto Oceanográfico de la Armada, Guayaquil, Ecuador Acta Oceanográfica del Pacífico, 9(1). p. 145-150 1390-0226 http://hdl.handle.net/1834/2289 Fish larvae Species diversity Ichthyoplankton Fixed stations Fish eggs Foraminifera Community composition Journal Contribution 1998 ftoceandocs 2023-04-06T16:58:56Z El presente trabajo se refiere a las variaciones observadas en el ictioplancton presente en la estación fija "La Libertad" desde febrero de 1997 hasta diciembre del mismo año. Los datos se relacionan con las observaciones ecológicas hechas en base a indicadores de masas de agua, formaníferos planctónicos, presentes en las mismas muestras. The present paper deals with the bioecology study of the ichthyoplankton at the fixed sampling site "La Libertad" located 10 miles offshore of Salinas-Peninsula de Santa Elena, Ecuador. Plankton samples analysed were collected every 20 days, from february to december 1997, onboard of boats belonging to the National Army. During 1997 the following dominant families of fish larvae were found: Scaenidae (18%), Engraulidae (9%), Bregmacerotidae (6%) and others beloging to the suborden Pleuroronectoidei (8%). The Clupeidae family decreased from 17% (until 19969) to 2% during the "El Niño" event 1997. The highest concentration of fish larvae was found during june, july and august, between 490 and 700 org.m², fish eggs were found in february, 23000 org.m² and june, august and octuber. The following species larvae of commercial value were found in the present study: Cetengraulis mysticetus (chuhueco), Scomberjaponicus (macarela) and Sardinops sagax (sardina del sur). In relation to the past years, important changes in the composition of species of ichthyoplankton and zooplankton were found specially into planktonic foraminifera. The dominant species in the planktonic foraminifera group were: Globigerinoides sacculifer, G. ruber, Globoquadrina dutertrei, Globigerinella aequilateralis which are related to warm, oceanic and poor nutrient waters, properties observed in surface water from february to december 1997 with light mix of cool water as is indicated by the increase of Globigeina bulloides during july, august, september and november 1997. In general, according to biological markers, the "El Niño" 1997 event conditions has shown rising effects in the zooplanktonic fauna up to ... Other Non-Article Part of Journal/Newspaper Planktonic foraminifera IODE-UNESCO: OceanDocs - E-Repository of Ocean Publications Libertad ENVELOPE(-55.817,-55.817,-63.000,-63.000) |
institution |
Open Polar |
collection |
IODE-UNESCO: OceanDocs - E-Repository of Ocean Publications |
op_collection_id |
ftoceandocs |
language |
Spanish |
topic |
Fish larvae Species diversity Ichthyoplankton Fixed stations Fish eggs Foraminifera Community composition |
spellingShingle |
Fish larvae Species diversity Ichthyoplankton Fixed stations Fish eggs Foraminifera Community composition Luzuriaga de Cruz, M. Ortega, D. Elías, E. Aspectos bioecológicos del ictioplancton en la estación fija "La Libertad" durante 1997 |
topic_facet |
Fish larvae Species diversity Ichthyoplankton Fixed stations Fish eggs Foraminifera Community composition |
description |
El presente trabajo se refiere a las variaciones observadas en el ictioplancton presente en la estación fija "La Libertad" desde febrero de 1997 hasta diciembre del mismo año. Los datos se relacionan con las observaciones ecológicas hechas en base a indicadores de masas de agua, formaníferos planctónicos, presentes en las mismas muestras. The present paper deals with the bioecology study of the ichthyoplankton at the fixed sampling site "La Libertad" located 10 miles offshore of Salinas-Peninsula de Santa Elena, Ecuador. Plankton samples analysed were collected every 20 days, from february to december 1997, onboard of boats belonging to the National Army. During 1997 the following dominant families of fish larvae were found: Scaenidae (18%), Engraulidae (9%), Bregmacerotidae (6%) and others beloging to the suborden Pleuroronectoidei (8%). The Clupeidae family decreased from 17% (until 19969) to 2% during the "El Niño" event 1997. The highest concentration of fish larvae was found during june, july and august, between 490 and 700 org.m², fish eggs were found in february, 23000 org.m² and june, august and octuber. The following species larvae of commercial value were found in the present study: Cetengraulis mysticetus (chuhueco), Scomberjaponicus (macarela) and Sardinops sagax (sardina del sur). In relation to the past years, important changes in the composition of species of ichthyoplankton and zooplankton were found specially into planktonic foraminifera. The dominant species in the planktonic foraminifera group were: Globigerinoides sacculifer, G. ruber, Globoquadrina dutertrei, Globigerinella aequilateralis which are related to warm, oceanic and poor nutrient waters, properties observed in surface water from february to december 1997 with light mix of cool water as is indicated by the increase of Globigeina bulloides during july, august, september and november 1997. In general, according to biological markers, the "El Niño" 1997 event conditions has shown rising effects in the zooplanktonic fauna up to ... |
format |
Other Non-Article Part of Journal/Newspaper |
author |
Luzuriaga de Cruz, M. Ortega, D. Elías, E. |
author_facet |
Luzuriaga de Cruz, M. Ortega, D. Elías, E. |
author_sort |
Luzuriaga de Cruz, M. |
title |
Aspectos bioecológicos del ictioplancton en la estación fija "La Libertad" durante 1997 |
title_short |
Aspectos bioecológicos del ictioplancton en la estación fija "La Libertad" durante 1997 |
title_full |
Aspectos bioecológicos del ictioplancton en la estación fija "La Libertad" durante 1997 |
title_fullStr |
Aspectos bioecológicos del ictioplancton en la estación fija "La Libertad" durante 1997 |
title_full_unstemmed |
Aspectos bioecológicos del ictioplancton en la estación fija "La Libertad" durante 1997 |
title_sort |
aspectos bioecológicos del ictioplancton en la estación fija "la libertad" durante 1997 |
publisher |
Instituto Oceanográfico de la Armada, Guayaquil, Ecuador |
publishDate |
1998 |
url |
http://hdl.handle.net/1834/2289 |
op_coverage |
La Libertad, Provincia de Santa Elena, Ecuador |
long_lat |
ENVELOPE(-55.817,-55.817,-63.000,-63.000) |
geographic |
Libertad |
geographic_facet |
Libertad |
genre |
Planktonic foraminifera |
genre_facet |
Planktonic foraminifera |
op_relation |
Acta Oceanográfica del Pacífico, 9(1). p. 145-150 1390-0226 http://hdl.handle.net/1834/2289 |
_version_ |
1766169955425845248 |