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1 May 2007 Diet of Dinocras cephalotes and Perla marginata (Plecoptera: Perlidae) in an Apennine stream (northwestern Italy)
Tiziano Bo, Stefano Fenoglio, Giorgio Malacarne
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Abstract

The feeding habits of nymphs of Perla marginata (Panzer) and Dinocras cephalotes (Curtis) were investigated in the Rio Orbarina (northwestern Italy). These species are among the largest European carnivorous freshwater invertebrates and they play an important role in the trophic structure of small, fishless Apennine streams. We examined the gut contents of 60 P. marginata and 60 D. cephalotes nymphs to characterize the diets and evaluate possible feeding differences between the species. In both of these predaceous stoneflies, the diet included vegetable detritus, mainly in the smaller instars. Both species showed trophic preferences, since only a few taxa constituted most of the ingested prey items, independently of their availability in the substratum. Interestingly, there were no clear differences in prey selection between nymphs of the two species.

Tiziano Bo, Stefano Fenoglio, and Giorgio Malacarne "Diet of Dinocras cephalotes and Perla marginata (Plecoptera: Perlidae) in an Apennine stream (northwestern Italy)," The Canadian Entomologist 139(3), 358-364, (1 May 2007). https://doi.org/10.4039/n06-005
Received: 19 January 2006; Accepted: 1 December 2006; Published: 1 May 2007
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