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Nymphal trophic behaviour of two Nemouridae species (Insecta, Plecoptera) in the Curone creek (northern Apennines, Italy)

Authors

  • Manuel J. LÓPEZ-RODRÍGUEZ,

    Corresponding author
    1. Dipartimento di Scienze dell'Ambiente e della Vita, Università del Piemonte Orientale, Via Teresa Michel, Alessandria, Italy
    2. Departamento de Biología Animal, Facultad de Ciencias, Universidad de Granada, Campus Fuentenueva s/n, Granada, Spain
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  • Tiziano BO,

    1. Dipartimento di Scienze dell'Ambiente e della Vita, Università del Piemonte Orientale, Via Teresa Michel, Alessandria, Italy
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  • J. Manuel TIERNO DE FIGUEROA,

    1. Departamento de Biología Animal, Facultad de Ciencias, Universidad de Granada, Campus Fuentenueva s/n, Granada, Spain
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  • Stefano FENOGLIO

    1. Dipartimento di Scienze dell'Ambiente e della Vita, Università del Piemonte Orientale, Via Teresa Michel, Alessandria, Italy
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Manuel Jesús López-Rodríguez, Dipartimento di Scienze dell'Ambiente e della Vita, Università del Piemonte Orientale, Via Teresa Michel, 11, 15121, Alessandria, Italy. Email: manujlr@ugr.es

Abstract

Feeding habits of the Euholognathan stoneflies Nemoura hesperiae and Amphinemura sulcicollis are studied in a little stream located in northern Italy. The former fed mainly on coarse particulate organic matter (CPOM), together with detritus, while the latter fed principally on detritus and, in a lower concern, on CPOM. Thus they can be catalogued fundamentally as shredder and collector-gatherer, respectively. Shifts in diet composition were detected in relation to size in both taxa. Probably niche overlapping does not exist despite both species having similar size and nymphal development duration, and coinciding in time. This work supports that, though functional feeding groups are very useful, they should not be inferred from related species or higher taxonomical levels. Even intra-population differences and ontogenetic shifts should be considered in fine scale studies.

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