搜索结果: 1-5 共查到“农学总论 migration”相关记录5条 . 查询时间(0.287 秒)
Interactions between rural migration and land use change in the forest villages in the Gökçay Watershed
Land use mountainous forest villages rural migration
<
2011/6/29
This study was carried out to analyze the spatial and temporal pattern of land use/land cover change (from 1955 to 2008) and migration movement (from 1935 to 2007) in the Gökçay River Wate...
STUDY OF MIGRATORY STURGEON CAPTURES IN ROMANIAN SIDE OF DANUBE RIVER MIGRATION OF FISHES IN ROMANIAN DANUBE RIVER, № 3
marine sturgeons migration capture dynamics stocks protection
<
2010/3/23
Study of fish captures could bring out valuable information on tendencies in stocks dynamics as well as on the level of “fishing pressure” on natural fish population. Decreasing amount of annual captu...
MIGRATION OF FISHES IN ROMANIAN DANUBE RIVER (Nº 1)
migration fish capture dynamic Danube fulton factor protection
<
2010/3/23
Present review paper tries to show the main aspects of migration of fishes in Romanian sector
of Danube River. The Danube River has a large hydrographical basin, being the second largest river in Eur...
BIOLOGICAL ASPECTS OF MAIN MARINE MIGRATORY STURGEONS IN ROMANIAN DANUBE RIVER MIGRATION OF FISHES IN ROMANIAN DANUBE RIVER, № 4
Danube River migratory sturgeons biology migration biometric data
<
2010/3/24
Marine migratory sturgeons form one of the most valuable fish population of the Lower Danube
River ecosystem and are also extremely important for the economy of Romania and some other riverside count...
STRUCTURE OF DANUBE SHAD (Alosa pontica Eichwald, 1838)SPAWNER FLOCKS MIGRATING FOR REPRODUCTION IN DANUBE RIVER(MIGRATION OF FISHES IN ROMANIAN DANUBE RIVER No 2)
Danube shad Migration Captures Stocks structure
<
2010/3/23
The main purpose of this paper is to actualize last data on Danube shad (Alosa pontica Eichwald,1838) migration process in Danube River. This species was widely studied last time in Danube River, but ...