Lake Wcrbcllin (804 ha. 18 m mean depth). a mesotrophic lake in north-eastem Germany yielded between <] and 14 tons (1.2 and 17.4 kg/ha) of vendace during the] 970's and 1980"'.;. For the last 20 years. the lake has been stocked annually with 0.5 3.3 million eleutheroembryos (620 4100 per ha) in early spring. but the population is presumably self-sustaining. The contribution of stocking to comm...

The early Jurassic volcanism of Central Patagonia covers an extensive area 50,000 km2 where the volcanic deposits occur as isolated systems. records form elongated belt in which composition, depositional and genetic features, show several differences along with its distribution. Cañadón Chileno Complex (CCHC), located Río Negro province, provides opportunity to evaluate improve knowledge about ...

Nagasari Volcano, part of the Dieng volcanic complex, is one unique volcanoes in Central Java. Around this volcano grow eruption craters, cones, and pyroclastic flow ridges. There were several 14 centers around Mount Nagasari, so it necessary to know development magmatism evolution. The aims research determine evolutionary magmatism. methodology used geological mapping petrographic analysis. ob...

The Bengkaung area, Batulayar District, West Lombok is suspected to be very vulnerable the risk of earthquake hazards. However, in this area no scientific research, either geological or geophysical, has ever been carried out regarding hazard. How are physical characteristics lithology and structure disaster? purpose study was determine subsurface structures that were validated by level damage. ...

Abstract Although rare, basaltic Plinian eruptions represent a considerable volcanic hazard. The low viscosity of crystal-poor magma inhibits fragmentation; however, Las Sierras-Masaya volcano, Nicaragua, has produced multiple eruptions. Here, we quantify the geochemistry and volatile concentrations melt inclusions in samples Fontana Lapilli Masaya Triple Layer to constrain pre-eruptive conditi...

The growth and development of the aragonitic CaCO3 otoliths of teleost fish could be vulnerable to processes resulting from ocean acidification. The potential effects of an increase in atmospheric CO2 on the calcification of the otoliths were investigated by rearing Atlantic cod Gadus morhua L. larvae in 3 pCO2 concentrations — control (370 μatm), medium (1800 μatm) and high (4200 μatm) — from ...

Life-history characteristics of age-0 sturgeon chub Macrhybopsis gelida, shoal chub Macrhybopsis hyostoma and sicklefin chub Macrhybopsis meeki were compared using several methods. All Macrhybopsis species consumed mostly midge pupae, but M. meeki had the most general diet (Levins' index, B = 0.22) compared with M. hyostoma (B = 0.02) and M. gelida (B = 0.09). Morisita's diet overlap index amon...

This paper presents the results of a geological engineering investigation in form rock mass characterization at Jlantah Dam Intake Tunnel. The study was carried out through technical mapping, core drill evaluation and supported by laboratory test data. determination classification research site has been using Rock Mass Rating (RMR) method, but it is necessary to use another method that more sui...

The Tsushima Lapilli Tuff, the thickest tuff in Taishu Group on Island, underwent a thermal event after deposition, and has not previously yielded reliable age because various ages have been reported. This study clarifies eruption history of Tuff based fission-track (FT) U–Pb dating zircon grains using laser ablation inductively coupled plasma mass spectrometry (ICP-LA-MS) evaluates submarine v...