Invasive Species Compendium

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Abstract

Biodiversity of spiders in weeds of vegetable field margins in Menofiya Governorate, Egypt.

Abstract

Spiders were sampled from weed-infested Phaseolus vulgaris fields in Kafr-Dawood, Sadat city, Menoufiya Governorate, Egypt, from 10 April to 4 June 2001 (spring), and from 14 October to 22 December (autumn) using pitfall traps. The major weed species in the area were Paspalum paspalodesP. distichum and Cynodon dactylon. In the spring, 48 specimens representing Lycosidae (20), Clubionidae (7), Dysderidae (7), Salticidae (6), Gnaphosidae (6), Dictyinidae (one) and Uloboridae (one) were collected from weeds. In the autumn, 58 specimens under Lycosidae (49), Linyphiidae (3), Salticidae (3), Philodromidae (2) and Hersiliidae (one) were obtained from weeds. The identified species were Hogna ferox, Hogna sp., Erigone dentipalpis, Thanatus albini and Thanatus species. Seventy specimens under Lycosidae (43), Linyphiidae (24), Salticidae (2) and Dictynidae (one) were collected from Phaseolus vulgaris in the spring. In the autumn, the 71 specimens obtained from P. vulgaris were classified under Lycosidae (65) and Linyphiidae (6). The identified species were H. ferox, Hogna sp., E. dentipalpis, Prinerigone vagans, T. albini and Titanoeca. In weeds and Phaseolus vulgaris, juveniles constituted 22 and 38% of the total number of specimens, respectively. The importance value index indicated the importance of Lycosidae in weed and P. vulgaris habitats.