Results 11 to 20 of about 360,193 (299)

Isoprenoids Control Germ Cell Migration Downstream of HMGCoA Reductase [PDF]

Developmental Cell, 2004
3-hydroxy-3-methylglutaryl coenzyme A reductase (HMGCoAr) provides attractive cues to Drosophila germ cells, guiding them toward the embryonic gonad. However, it remains unclear how HMGCoAr mediates this attraction. In a genomic analysis of the HMGCoAr pathway, we found that the fly genome lacks several enzymes required for cholesterol biosynthesis ...
Santos, Ana C, Lehmann, Ruth
openaire   +3 more sources

Downstream fish passage at small-scale hydropower plants: Turbine or bypass?

Frontiers in Environmental Science, 2023
Introduction: Hydropower plants are frequently equipped with physical and behavioral fish protection barriers to prevent downstream moving fish from harmful turbine passage and to guide them to alternative bypasses.
Josef Knott, Melanie Mueller, Joachim Pander, Juergen Geist   +3 more
doaj   +1 more source

Migration pattern of silver eel (Anguilla anguilla, L.) in an obstructed river system. [PDF]

, 2008
The downstream migration of European silver eels in the River Frémur was examined to determine the potential effects of the numerous migration barriers that exist on waterways in western France.
A. Legault, Acou, Anthony, Legault, Antoine, P. Laffaille, Laffaille, Pascal, Feunteun, Eric, A. Acou, E. Feunteun   +7 more
core   +1 more source

Temporal patterns in the upstream migration of European eels (Anguilla anguilla) at the Couesnon estuarine dam [PDF]

, 2007
The temporal migration patterns of European glass eel Anguilla anguilla at the Couesnon estuarine dam (Mont-Saint-Michel Bay, France)were examined in winter and spring 2004 and 2005.
Caraguel, Jean-Marie, Legault, Antoine, Laffaille, Pascal   +2 more
core   +1 more source

Temporal progression in migratory status and sexual maturation in European silver eels during downstream migration [PDF]

, 2011
The onset of downstream migration of European eels is accompanied by a cessation of feeding and the start of sexual maturation which stresses the link between metabolism and sexual maturation, also suggesting an important role for exercise.
Guerrero, M.A., Gerard de Laak, Thillart, G.E.E.J.M., Ma. Angeles Guerrero, Guido E. E. J. M. van den Thillart, Arjan P. Palstra, Jan P. G. Klein Breteler, Palstra, A.P., Klein Breteler, J.G.P.   +8 more
core   +1 more source

Evaluation of a fine-spaced angled rack with surface bypass in providing safe and timely downstream passage for salmon smolts and silver eels

Knowledge and Management of Aquatic Ecosystems, 2023
Hydropower production can cause migration delay and fish mortality, impeding the safe and timely downstream migration of diadromous fish, such as Atlantic salmon (Salmo salar) and silver eels (Anguilla anguilla).
Tétard Stéphane, Courret Dominique, Tissot Laurence, Richard Sylvain, Lagarrigue Thierry, Frey Aurélien, Mataix Vincent, Mercier Olivier, Tomanova Sylvie   +8 more
doaj   +1 more source

Validation of a Swimming Direction Model for the Downstream Migration of Atlantic Salmon Smolts [PDF]

Water, 2021
Fish swimming performance is strongly influenced by flow hydrodynamics, but little is known about the relation between fine-scale fish movements and hydrodynamics based on in-situ investigations. In the presented study, we validated the etho-hydraulic fish swimming direction model presented in the River Mandal from Southern Norway, using similar ...
Marcell Szabo-Meszaros, Ana Silva, Kim Bærum, Henrik Baktoft, Knut Alfredsen, Richard Hedger, Finn Økland, Karl Gjelland, Hans-Petter Fjeldstad, Olle Calles, Torbjørn Forseth   +10 more
openaire   +2 more sources

Performance of a large partial-depth guide wall to divert downstream migrating Atlantic salmon smolts at Tuilières dam, Dordogne River

Knowledge and Management of Aquatic Ecosystems, 2020
From 2010 to 2016, an evaluation of the performance of a partial-depth guide wall associated with three surface bypasses to ensure the safe downstream migration of Atlantic salmon smolts was conducted at the Tuilières power plant on the Dordogne River in
Larinier Michel, Dumond Lionel, Lagarrigue Thierry, Frey Aurélien, Travade François   +4 more
doaj   +1 more source

CCR1 Acts Downstream of NFAT2 in Osteoclastogenesis and Enhances Cell Migration [PDF]

Journal of Bone and Mineral Research, 2006
Abstract We found that a chemokine receptor gene, CCR1, acts downstream of NFAT2 in RANKL-stimulated RAW264 and bone marrow cells. The upstream regulatory region of CCR1 showed RANKL-dependent and CsA-suppressible promoter activity.
Norihiro, Ishida, Koji, Hayashi, Asuka, Hattori, Keiichiro, Yogo, Toru, Kimura, Tatsuo, Takeya   +5 more
openaire   +2 more sources

PInk salmon Oncorhynchus gorbuscha (Salmoniformes, Salmonidae) on the continental coast of the Okhotsk Sea. Communication 1. The juveniles

Известия ТИНРО, 2023
Data on juvenile pink salmon from the continental coast of the Okhotsk Sea obtained in 1960s–2010s are summarized. The timing and dynamics of their downstream migration are considered in terms of biological parameters and nutrition.
S. L. Marchenko
doaj   +1 more source