La iniciativa de lOS autores ha sido auspiciada por la Comisión Científica de La provincia de Buenos Aires. Su patronazgo, solicitado y otorgado sin retaceos, ha sido la esencia de esta realización. La Dirección de Conservación de la Fauna de la Província, interesada en el conocimiento cabal de los recursos
The red-eared slider (Trachemys scripta elegans) is a worldwide highly invasive species, currently introduced in most freshwater habitats as a consequence of massive pet trade. In the Iberian Peninsula, this species is competing with and displacing the endangered native Spanish terrapin (Mauremys leprosa). Sliders are considered environmentally aggressive turtles, capable
The topmouth gudgeon Pseudorasbora parva Schlegel, 1842, a south-east asian cyprinid, was introduced accidentally in the Danube Delta in Romania in the 1960s and has now achieved a pan-Danu-bian distribution. P. parva has been introduced into other countries, such as Greece, usually inadvertently included with other species imported for fish
For the last 800 years, 35 alien fish species have been introduced, mainly intentionally, in Polish inland waters. The paper reviews the present state of alien fish fauna in Poland, with special attention paid to those considered to be invasive. Till now 26 species have been reported as naturalized, acclimatized
Evidence available for most inland water and terrestrial organisms highlights the significant role played by southern Italy, Sicily and the Maltese islands as refuges during Pleistocene climatic fluctuations. However, to date, the hypothesis that these areas may have acted as Pleistocene refugia for the freshwater crab Potamon fluviatile has not
n the Maltese language the freshwater crab or river crab {Potamon sp.) has a common name and is referred to as Qabru (plural: Qwabar). Thanks to this common name it is possible to know the first probable reference, in the literature, to the freshwater crab in Malta. In 1647 the
Tropical regions contain many more species than do temperate and polar regions; however, explanations as to why remain unclear; for example, see [1, 2]. The Amazon Basin is particularly species rich and harbors arguably the world’s greatest terrestrial [3, 4] and freshwater [5] biodiversity. Numerous potential processes generating this diversity
This publication has been prepared by IUCN (International Union for Conservation of Nature). The designation of geographical entities in this book, and the presentation of the material, do not imply the expression of any opinion whatsoever on the part of the European Commission or IUCN concerning the legal status of
Systematics of the cichlid genus Symphysodon has been investigated and three species are recognised: S. discusHeckel, 1840 (synonym: S. discus willischwartzi Burgess, 1981); S. aequifasciatus Pellegrin, 1904 (synonyms: S. discus var. aequifasciata Pellegrin, 1904; S. aequifasciata aequifasciata sensu Schultz, 1960; S. Discus Tarzoo – sic –Lyons, 1960); and S. haraldi,
The Western Ghats is one of the world’s most heavily populated Biodiversity Hotspots providing for and supporting 400million people through water for drinking, transport, irrigation, and hydroelectric power, together with food and resources to sustain livelihoods. However, the pace of growth of the Indian economy and rates of industrial and
Potamotrygon boesemani, new species, is described from the Corantijn river drainage in Surinam. The species has a diagnostic dorsal color pattern formed by deep orange to red ocellated spots of irregular form, encircled by relatively broad black rings. Potamotrygon boesemani is distinguished from other ocellated congeners (P. motoro, P. henlei
The monotypic species Ossubtus xinguense was originally described based on scarce material putatively divided into juveniles and adults. Ossubtus xinguense has a restricted distribution and was previously known only from a few rapids downstream of the city of Altamira, in the Volta Grande stretch of the Middle Xingu River. Until
Abstract. This study is a comprehensive review of fish fauna data for the Xingu River system. Information was compiled from seven field surveys (conducted between 2001 and 2002), bibliographic references, and museum collection records.To provide data on the spatial distribution of fish species, the river basin was divided into six
