Odonatological Abstract Service published by the INTERNATIONAL DRAGONFLY FUND (IDF) in cooperation with the WORLDWIDE DRAGONFLY ASSOCIATION (WDA) Editors: Dr. Klaus Reinhardt, Dept Animal and Plant Sciences, University of Sheffield, Sheffield S10 2TN, UK. Tel. ++44 114 222 0105; E-mail:
[email protected] Martin Schorr, Schulstr. 7B, D-54314 Zerf, Germany. Tel. ++49 (0)6587 1025; E-mail:
[email protected] Dr. Milen Marinov, 7/160 Rossall Str., Merivale 8014, Christchurch, New Zealand. E-mail:
[email protected] Published in Rheinfelden, Germany and printed in Trier, Germany. ISSN 1438-0269 ties were not significantly nested. The faunal similarity with the adjacent island of Tenerife is striking. Six of the 1997 Tenerife species are seemingly absent from Gran Ca- naria, whereas Gran Canaria has 13 species not found 11767. Hahn, N.S.; Agostinho, A.A.; Goitein, R. (1997): in Tenerife. Most of the 22 aquatic insect species in Feeding ecology of curvina Plagioscion squamosissi- Gran Canaria only known from older records, prefer len- mus (Hechel, 1840) (Osteichthyes, Perciformes) in the tic habitats not included in our study. All except one of Itaipu Reservoir and Porto Rico floodplain. Acta limno- the five species endemic to Gran Canaria are consid- logica Brasiliensia 9: 11-22. (in English, with Portugue- ered extinct or on the edge of extinction. Increased fu- se summary) [Fish samplings were carried out from No- ture extinction rates are predicted as a response of the vember 1983 to September 1988, at different sites of extreme habitat loss, with only three permanent streams the Paraná River basin (Brazil), comprising the section known on the island today." (Authors) The following between the Paranapanema and Iguaçu Rivers.