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Analisis de los macroinvertebrados bentonicos y su helmintofauna en el rio Porma (Leon, NO España)

Other TitlesAnalysis of the benthic macroinvertebrates and their helminthofauna in the Porma river (Leon,NW Spain)
AuthorsGonzález Lanza, Camino ; Álvarez-Pellitero, Mª del Pilar ; Presa Martínez, Y.
KeywordsBenthic macroinvertebrates
Porma river (León, Spain)
Issue Date1986
PublisherAsociación Española de Limnología
CitationLimnética 2: 181-187 (1986)
AbstractThe structural characteristics of the study on the benthic macroinvertebrates communities of the Porma river illustrated a large richness and diversity in the lotic zones while in the lentic ones a great abundance was observed though little diversity. As a whole, the maximum richness was observed in november in San Vicente del Condado. As to abundance the maximum was detected in december in Palazuelo and the minimum in may—june in San Vicente and Castrillo. The diversity was clearly greater in the lotic zones with values higher than 3 in most of the months. In general, the macroinvertebrates communities presented similar structure quantitatively as well as qualitatively. As far as affinities Sorensen’s index demonstrated less variations in the grouping of months are concerned with the values wavering around 60%. According to the helminthological study the parasitized macroinvertebrates branch with the largest number of species was the arthropod one, followed by the molluscs and annelids, and the prevalence of infestation was clearly larger for the megalopteres and annelids. The parasites found were digeneans from the Strigeidae, Echinostomatidae, Plagiorchiidae, and Allocreadiidae families and the nematodes larvae from the Mermithidae family. Their infestations showed, in general, a bimodal seasonality.
Description7 páginas, 3 figuras, 1 tabla.--
Publisher version (URL)http://www.limnetica.com/Limnetica/Limne2/Limnetica-vol2-pag181-187.pdf
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