Results 1 to 10 of about 347,083 (164)

DOWNSTREAM MIGRATION: PROBLEMS AND FACILITIES [PDF]

Knowledge and Management of Aquatic Ecosystems, 2002
Downstream fish passage technology is much less advanced than it is for upstream fish passage facilities. This is simply due to the fact that efforts to re-establish free movement for migrating fish began with the construction of upstream fish passage facilities, and that downstream migration problems have only been recognised and addressed more ...
LARINIER M., TRAVADE F.
doaj   +2 more sources

Social influences complement environmental cues to stimulate migrating juvenile salmon [PDF]

Movement Ecology
Background The large-scale seasonal migrations undertaken by many species require complex navigational and timing decisions. Animals migrating in groups might benefit from collective decision making, especially if the environment has large local ...
Maria Kuruvilla, Thomas P. Quinn, Joseph H. Anderson, Mark D. Scheuerell, Erika M. Miller, Andrew G. Berger, Connie Okasaki, John R. McMillan, George R. Pess, Peter A. H. Westley, Andrew M. Berdahl   +10 more
doaj   +2 more sources

Using Downstream DPSK and Upstream Wavelength-Shifted ASK for Rayleigh Backscattering Mitigation in TDM-PON to WDM-PON Migration Scheme

IEEE Photonics Journal, 2013
A migration scheme from time-division-multiplex passive optical network (TDM-PON) to wavelength-division-multiplex PON (WDM-PON) using differential phase-shift keying (DPSK) for the downstream signal and wavelength-shifted amplitude-shift keying (WS-ASK)
C. W. Chow, C. H. Yeh
doaj   +3 more sources

Toddler signaling regulates mesodermal cell migration downstream of Nodal signaling

eLife, 2017
Toddler/Apela/Elabela is a conserved secreted peptide that regulates mesendoderm development during zebrafish gastrulation. Two non-exclusive models have been proposed to explain Toddler function.
Megan L Norris, Andrea Pauli, James A Gagnon, Nathan D Lord, Katherine W Rogers, Christian Mosimann, Leonard I Zon, Alexander F Schier   +7 more
doaj   +9 more sources

Downstream Migration of Burbot (Lota lota) Larvae in the Subglacial Period [PDF]

BIO Web of Conferences
The research was carried out in the Ob-Irtysh basin on the Irtysh River. The studied section of the river is located in Western Siberia in the Tyumen region.
Chemagin Andrey, Volosnikov Gleb, Drabovich Yuri   +2 more
doaj   +2 more sources

Chum salmon Oncorhynchus keta (Walbaum) on the continental coast of the Okhotsk Sea. Communication 2. The juveniles

Известия ТИНРО, 2023
Long-term data on downstream migration, qualitative and quantitative characteristics and feeding of juvenile chum salmon are generalized for the continental coast of the Okhotsk Sea.
S. L. Marchenko
doaj   +1 more source

Temporary turbine and reservoir level management to improve downstream migration of juvenile salmon through a hydropower complex

Knowledge and Management of Aquatic Ecosystems, 2021
Developing management rules to improve downstream migration of salmon smolts in large hydropower plants is essential to limit mortality and migration delay.
Tétard Stéphane, Roy Romain, Teichert Nils, Rancon Jocelyn, Courret Dominique   +4 more
doaj   +1 more source

HYDRAULICS OF HORIZONTAL BAR RACKS FOR FISH DOWNSTREAM MIGRATION [PDF]

38th IAHR World Congress - "Water: Connecting the World", 2019
Proceedings of the 38th IAHR World Congress (Panama)
Meister, Julian, Fuchs, Helge, Albayrak, Ismail, Boes, Robert   +3 more
openaire   +3 more sources

ESTIMATION OF ABUNDANCE FOR THE MIGRATING JUVENILE PINK SALMON IN THE RIVERS OF SAKHALIN AND ITURUP ISLANDS IN 2019

Известия ТИНРО, 2020
Number of the pink salmon fry migrating downstream from their spawning grounds in the control rivers in 2019 is assessed as 17546.2 . 103 and 14795.7 . 103 ind. for the Dagi and Bolshoi Khuzi Rivers (northeastern Sakhalin), as 89.1 . 103 and 2636.1 . 103
A. M. Kaev, G. N. Dzen, P. S. Sukhonos, I. S. Bobrov   +3 more
doaj   +1 more source

Updated mortality estimation formulae for salmonids passing through Francis turbines at hydropower plants

Knowledge and Management of Aquatic Ecosystems, 2023
Downstream migrating fish can be strongly affected by hydroelectric facilities. To set up adapted mitigation measures, it is important to identify these impacts (e.g. induced mortality rates).
Tomanova Sylvie, Courret Dominique, Tymen Blaise, Richard Sylvain, Dumond Lionel, Sagnes Pierre   +5 more
doaj   +1 more source