kutum is considered as one of the anadramous species of the caspian sea. due to continuous population decline of the fish since 1975, iranian fisheries organization started to restock this species. nowadays, there is growing concern over the effects of restocking on natural populations. for this purpose, population structure and genetic variation of this species in the iranian coastline of casp...

Background: The effect of natural background radiation on health is still controversial. However, it is clear that it depends on the dose received by the population. The estimation of external natural background gamma rays received by the population of Caspian coastal provinces in the northern part of Iran was the main goal of this study. Materials and Methods: Gamma rays was measured ...

The study of the landscape was once the main subject of study in geography. Now, it is a core topic in many disciplines, such as geography and ecology, soil science and land survey, landscape architecture and planning, psychology and philosophy, history and archaeology. This essay analyses how this evolution came about in Europe in general and focuses then upon the Belgian situation. Landscape ...

a Department of Geography, Texas Center for Geographic Information Science, 601 University Drive, Texas State University, San Marcos, San Marcos, TX 78666, United States b Department of Geography, McClure Hall 203, P.O. Box 443021, University of Idaho, Moscow, ID 83844, United States c Rocky Mountain Research Station, US Department of Agriculture Forest Service, 1221 South Main Street, Moscow, ...

Comparative performance of logistic regression and survival analysis for detecting spatial predictors of land-use change Ninghua Wang a , Daniel G. Brown b , Li An c , Shuang Yang a & Arika Ligmann-Zielinska d a Joint Ph.D. Program in Geography, San Diego State University and University of California, Santa Barbara, CA, USA b School of Natural Resources and Environment, University of Michigan, ...

Traditionally, Capoeta populations from the southern Caspian Sea basin have been considered as Capoeta capoeta gracilis. Study on the phylogenetic relationship of Capoeta species using mitochondrial cytochrome b gene sequences show that Capoeta population from the southern Caspian Sea basin is distinct species and receive well support (posterior probability of 100%). Based on the tree topologie...

Aim . The aim of the study is to analyze current state artificial reproduction Caspian sturgeon and identify problems reducing efficiency ways solve them. Discussion critical sturgeon, which accounts for up 90% world's related resources, concern entire community, due threat extinction these relic individuals on planet. This can be prevented by increasing reproduction. However, natural practical...

The invasion of the zebra mussel, Dreissena polymorpha, into North American waters has resulted in profound ecological disturbances and large monetary losses. This study examined the invasion history and patterns of genetic diversity among endemic and invading populations of zebra mussels using DNA sequences from the mitochondrial cytochrome oxidase I (COI) gene. Patterns of haplotype frequency...