SciELO - Scientific Electronic Library Online

 
vol.8 número1-2Determinación de la flora polinífera del valle de Oxapampa (Pasco-Perú) en base a estudios palinológicosEvaluación del riesgo acuático de siete productos farmacéuticos sobre Daphnia magna índice de autoresíndice de materiabúsqueda de artículos
Home Pagelista alfabética de revistas  

Servicios Personalizados

Revista

Articulo

Indicadores

  • No hay articulos citadosCitado por SciELO

Links relacionados

Compartir


Ecología Aplicada

versión impresa ISSN 1726-2216

Resumen

OYAGUE-PASSUNI, Eduardo. Discussion about the number of sample units and the unit sample size for estimation of the benthic macroinvertebrates density value in lotic environments. Ecol. apl. [online]. 2009, vol.8, n.1-2, pp.61-70. ISSN 1726-2216.

This paper discusses the appropriate number of Sample Units and the Minimum Sample Size (MSS) to determine the least biased value for estimating the density of benthic macroinvertebrates. This analysis applies to sections with similar physiographic and ecosystem characteristics in lotic habitats of mountainous rainforest. The data analyzed were obtained from intensive sampling using the Surber net method in an Andean-Amazonic piedmont river in central Peru (Colorado River, Chanchamayo river basin, Chanchamayo province in Junin). The results indicate that collecting efforts less than 12 Sample Units and individual samples equal or less than five replicates provide low quality data for density estimation. The results here obtained were compared with some empirical density estimations cited in Peruvian journals and technical reports since year 2000.

Palabras clave : Benthic macroinvertebrates; density; Minimum Sample Size; Sampling Effort; extrapolation; secondary production.

        · resumen en Español     · texto en Español     · Español ( pdf )