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Distribución y densidad de icioplancton en el estuario de Bahía Málaga, Pacífico colombiano (Septiembre de 2009 - Febrero de 2010).

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Author
Medina Contreras, Diana
Cantera, Jaime
Escarria Eugenia, Eugenia
Mejía Ladino, Luz M.
Date
2014

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Alternative Title
Distribution and density of ichthyoplankton in the Bahía Málaga estuary, Pacific coast of Colombia (September 2009-February 2010)
Abstract
Este estudio presenta la densidad, la composición taxonómica y la distribución espacial y temporal del ictioplancton en el estuario de Bahía Málaga, Pacífico colombiano, así como la relación entre estos parámetros biológicos y algunas variables físicoquímicas. Se recolectaron muestras en 12 estaciones a lo largo del canal principal de navegación, las cuales fueron tomadas en cuatro áreas seleccionadas siguiendo el diseño muestreal propuesto por Barletta-Bergan. Se realizaron arrastres superficiales con una red cónica-cilíndrica (ojo de malla: 500 μm; diámetro de boca: 0.6 m; largo: 3.5 m). La salinidad y la temperatura fueron medidas antes de cada arrastre. Un total de 69019 ind/1000 m3 de larvas, representadas en 23 familias, 36 géneros y 40 especies, fueron recolectadas en muestreos mensuales entre septiembre de 2009 y febrero de 2010. Carangidae (39.0%) fue la familia más abundante, seguida de Sciaenidae (27.1%) y Engraulidae (20.1%). Las familias más frecuentes fueron Sciaenidae (26.6%), seguida de Carangidae (22.8%) y Engraulidae (14.7%), las cuales son importantes en los ensamblajes de larvas de peces de estuarios tropicales. El 80% de la densidad fue aportada por seis especies, de las cuales Seriola morfotipo 1 (Carangidae) y Cetengraulis mysticetus (Engraulidae) fueron las más abundantes y dominantes. No se encontró correlación entre la densidad de larvas y la salinidad (Spearman, R = 0.23) o la temperatura (Spearman, R = 0.51). El análisis de las variaciones espaciales y temporales de la densidad de larvas señala diferencias significativas entre los meses muestreados (Anova, p = 0.0029; p < 0.05) pero no entre las áreas (Anova p = 0.078), sugiriendo que Bahía Málaga ofrece condiciones adecuadas para la presencia larval.
he density, taxonomic composition, and spatial and temporal distribution of the estuarine ichthyoplankton of Bahía Málaga (Pacific coast of Colombia) are described, as well as the relationship between biological parameters and some physicochemical variables. Samples were collected at 12 stations along the principal navigation canal; these samples were taken in four areas following the design of Barletta-Bergan. Surface sweeps were carried out with a conical-cylindrical net (mesh size 500 μ m, mouth diameter 0.6 m, length 3.5 m). Salinity and temperature were measured before each sweep. A total of 69019 larvae/1000 m³, representing 23 families, 36 genera and 40 species were collected during monthly sampling from September, 2009 to February, 2010. Carangidae (39.0%) was the most abundant family, followed by Sciaenidae (27.1%) and Engraulidae (20.1%). The most frequent families were Sciaenidae (26.6%), followed by Carangidae (22.8%) and Engraulidae (14.7%) which are important families in larval fish assemblages in tropical estuaries. Eighty percent of total density was provided by six species, of which Seriola morphotype 1 (Carangidae) and Cetengraulis mysticetus (Engraulidae) were the most abundant and dominant. No correlation was found between density and salinity (Spearman, R = 0.23) or temperature (Spearman, R = 0.51). Analysis of spatial and temporal variations of larval density shows significant differences among the months sampled (Anova, p = 0.0029; p < 0.05), but not among areas (Anova, p = 0.078), suggesting that Bahía Málaga offers adequate conditions for the presence of fish larvae.
Journal
Boletín de Investigaciones Marinas y Costeras
Volume
43
Issue/Article Nr
1
Page Range
pp.107-119
URI
http://hdl.handle.net/1834/6759
Collections
SPINCAM Publications (Colombia)

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