caspian region is on the receiver of caspian sea with five coastal states including of iran, russia, azerbaijan, turkmenistan and kazakhstan - in the surrounding sea, due to having common points in the features of natural geography, special location, political and cultural and historical background, is known as a geopolitical region. following the collapse of the soviet ::::union::::, due to ch...

—During November 2002, 51 shovelnose sturgeon Scaphirhynchus platorynchus were sexed by ultrasound imaging using a portable ultrasonograph. We identified males with 96% accuracy (N 5 25) and females with 80% accuracy (N 5 25); one hermaphroditic individual was misidentified as a male. Overall, ultrasound imaging was 86% accurate. Sex in postspawned females was difficult to determine, 60% being ...

A.D. Mus, State Institute for Coast and Sea, The Hague, The Netherlands, (email:[email protected]) P.H.A.J.M. van Gelder, Faculty of Civil Engineering and Geosciences, Delft University of Technology, The Netherlands (e-mail: [email protected]) A.O. Selivanov, Faculty of Geography, Moscow State University, Russia, ([email protected]) E.P.L. Elias, Faculty of Civil Engineering...

Increasing attention is being paid on leaf area index (LAI) retrieval in mountainous areas. Mountainous areas present extreme topographic variability, and are characterized by more spatial heterogeneity and inaccessibility compared with flat terrain. It is difficult to collect representative ground-truth measurements, and the validation of LAI in mountainous areas is still problematic. A cost-c...

Petroleum oil was used for many centuries in Egypt, China, Mesopotamia and Persia for heating, lighting, roadmaking and building. Small accumulations of oil were reported at Pechelbronn in Alsace in 1498 and in Poland in 1506, and Marco Polo noted 'oil springs' at Baku on the Caspian Sea in the latter part of the thirteenth century. Raleigh, in 1595, reported the existence of the Trinidad Pitch...

caspian sea is the largest enclosed body of water on the earth. since the collapse of soviet union in 1991 and discovering large oil and gas fields, some issues such as political, economic and environmental events, made the caspian sea important. the ecology of the sea are being endangered due to several issues such as petroleum extraction, river and sea pollutions, water level rise, biological...

background: main objective of this study was to investigate the invasive activity of the liver fluke, pseudamphistomom truncatum against the caspian seal ( pusa caspica ) and was exemplified at the gross, light microscopy (lm) and electron microscopy (em) levels. methods: the study was done on a freshly dead caspian seal in the southern coast of caspian sea. the checked caspian seal probably be...