Results 1 to 10 of about 79,500 (263)

Insights into Daily Dynamics of Fish Migration during Spring in the Konda River

open access: yesDiversity, 2023
Hydrology and temperature are known as key drivers for fish migration in floodplain-channel systems of large rivers. The Lower Irtysh contains valuable species of whitefish and sturgeon.
Andrey A. Chemagin, Martin Schletterer
doaj   +3 more sources

Reservoir Operating Rules to Create Effective Fish Migration Passages in a Reservoir

open access: yesWater Resources Research
Low flow velocity disrupts the potential fish migration passages in a reservoir, and causes reservoirs to become labyrinths for migratory fish. Previous studies showed that fish migration passages in a reservoir can be restored by modifying reservoir ...
B. H. Yang   +4 more
doaj   +2 more sources

A Multidimensional Continuum Model of Fish Population Dynamics and Behaviour: Application to the Barents Sea Capelin (Mallotus Villosus) [PDF]

open access: yesModeling, Identification and Control, 1982
The theoretical basis for a fishery model continuous in physical, temporal, and biological dimensions is discussed. A concrete application, constructed as one component of a larger system of physical and biological dynamic models descriptive of the ...
Mark Reed, Jens G. Balchen
doaj   +1 more source

Numerical simulation of flow in a fishway of Karkheh-Hamidieh diversion dam and environmental considerations to investigate possibility of fishway use in Mazandaran Province [PDF]

open access: yesEnvironmental Resources Research, 2019
Pool and weir is a type of fishway that provides a route for fish to migrate to damupstream. The effective parameters for fish swimming include velocity, water depth andturbulence.
Mehdi Nezhadnaderi, Tooraj Fathie
doaj   +1 more source

Damaged drop hydraulic structure as an example of natural river renaturalization process: the Dobrzyca, north west Poland

open access: yesActa Scientiarum Polonorum. Formatio Circumiectus, 2021
Aim of the study: The paper presents an assessment of the possibility of the hydraulic drop structure, which was partially destroyed, and the riverbed in the region of the structure is slowly renaturized.
Karol Krystian Plesiński   +3 more
doaj   +1 more source

Migration in Birds and Fishes [PDF]

open access: yesBijdragen tot de Dierkunde, 1949
Our knowledge concerning the periodical movements in animals called migrations is chiefly based on observations on birds. By and by, however, a number of facts concerning migration in other animal groups have been assembled and it seems worth while to compare them with those known for birds. There is the more reason to do so here, because the victim of
openaire   +2 more sources

Evaluation of cone fishways to facilitate passage of small-bodied fish

open access: yesAquaculture and Fisheries, 2021
Fishways are being provided more regularly than ever before and new designs are needed to provide passage for whole fish communities. Despite recent progress, fishways have frequently performed poorly, especially for small-bodied fish (i.e.
Ivor G. Stuart, Timothy J. Marsden
doaj   +1 more source

Global Warming Prediction Model of Fish Migration Based on ArcGIS [PDF]

open access: yesE3S Web of Conferences, 2020
Rising global ocean temperatures will disrupt the livelihoods of people who depend on fishing for marine crops. Therefore, we propose fishery migration prediction models to solve the problem. We considered the effects of seawater temperature and salinity,
Yipeng Zhang, Dichao Ning, Wentao He
doaj   +1 more source

Study of key technologies for fishways in the plateaus of western China

open access: yesGlobal Ecology and Conservation, 2019
Determining how to restore fish migration routes blocked by large dams is the subject of great debate. Fishways are effective engineering measures restoring fish migration routes.
Xi Mao   +10 more
doaj   +1 more source

Effects of temperature and water levels on dynamics of density and structure of the fish population of the channel-floodplain complex of a large river in the period of spring floods

open access: yesBiosystems Diversity, 2019
The article discusses the features of the dynamic process of migration of ichthyofauna from wintering sites to the wetlands of a large boreal river for feeding and spawning.
A. A. Chemagin
doaj   +1 more source

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