One new species of the genus Phradis, P. peruvianus sp. n., from the mountainous part of Peruvian Amazonia, is described and illustrated. This is the first record of the genus from South America and the

Type material of several polychaete species described by Enrique Rioja from Mexican coasts are lost, and the current status of some species is doubtful. Nereis oligohalina (Rioja, 1946) was described from the Gulf of Mexico, but it has been considered a junior synonym of Nereis occidentalis Hartman, 1945, or regarded as a distinct species with an amphiamerican distribution. On the other hand, N...

in this study, the amount of nickel and vanadium elements in the soft tissues of rock oysters (saccostrea cuculata) and sea water from coastal areas of qeshm island, the biggest island of persian gulf located in the south of iran, were measured to evaluate the contamination of the aquatic environment and organisms. following the bioassay, weighing and chemical digestion of the samples, finally...

Long-term forecasts of coastal evolution are becoming increasingly relevant in view climate change and a further transition to sustainable long-term management the coast. An integrated approach is required deal with decadal timescale interactions between marine, beach dune sections A new coupled model, coDaC, has been created for this purpose, which described paper.

Springs are the important water resources, which thier study is necessary in terms of their management and exploitation. In northern Iran, the karst springs locate in the central Alborz highlands and alluvial springs on the Caspian southern coasts.The Karst and alluvial springs discharge is variable because of different conditions in terms of aquifer, topography and precipitation .This study ha...