Diet of Oedipoda miniata mauritanica and Oedipoda coerulescens sulfurescens(Orthoptera: Acrididae) on the coast of the Tlemcen region (Algeria)
Abstract
D. Meriem*, M. Lotfi and B. Nadhira
The orthoptera represent a crucial link in food chains as primary consumers. They have long been recognized as crop pests that cause extensive damage, and thus, arouse scientific interest around their diet. In this study, our objective was to know the diet and trophic preferences of two locust species, Oedipoda miniata mauritanica (Lucas, 1849) and Oedipoda caerulescens sulfurescens (Saussure, 1884) under natural conditions. The sampling was carried out in 2016 in Ghazaouet, a coastal region of the Tlemcen subject to a subhumid climate. We examine feces contents by comparing the epidermal fragments of plants ingested by these two locusts with those of a reference collection prepared from plant species existing in the sampled biotope. This method is practical for field research, as it is simple, fast, and objective. The food spectrum of the two Oedipodinae reveals their clear preference for three plant species over all the plants present in the study area, and each species chooses its food according to its availability and nutritional characteristics. Furthermore, Oedipoda miniata mauritanica shows a great affinity for the plant species Lavendula dentata, with a consumption rate >59%, on the other hand, Oedipoda caerulescens sulfurescens prefers the plant species Lavendula multifida, with a consumption rate >50%. We can therefore consider these two locuts as euryphagous species consuming mainly Lamiaceae.