Potential Role of the Magnetic Field on Homing in Chum Salmon (Oncorhynchus keta) Tracked from the Open Sea to Coastal Japan

Groups of hatchery reared juvenile chum salmon (Oncorhynchus keta) from Conuma River, British Columbia, were tested for compass directional preferences in experimental tanks. Chum salmon generally moved in the direction appropriate for migration through Nootka Sound to the North Pacific Ocean. Fry orientation was not disrupted by covers over the tanks. Stainless steel coded wire tags inserted into the heads of the salmon had little effect, regardless of whether they were magnetized or not. A 90° change in the external magnetic field influenced fry directional movements, but the magnitude and direction of the change were not readily explainable.

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Detritus and Juvenile Salmon Production in the Nanaimo Estuary: II. Meiofauna Available as Food to Juvenile Chum Salmon (Oncorhynchus keta)

Journal of the Fisheries Research Board of Canada ◽

10.1139/f79-073 ◽

1979 ◽

Vol 36 (5) ◽

pp. 497-503 ◽

Cited By ~ 41

Author(s):

J. R. Sibert

Keyword(s):

Chum Salmon ◽

Late Summer ◽

Oncorhynchus Keta ◽

Close Coupling ◽

Chum Salmon Oncorhynchus Keta ◽

Salmon Fry ◽

Harpacticoid Copepods ◽

Food Requirement ◽

Juvenile Chum Salmon

The meiofauna of the Nanaimo Estuary are briefly described. Nematodes and harpacticoid copepods were the numerically dominant taxa and reached their maximum population densities in late summer. Harpacticus uniremis was very important to the early diet of juvenile chum salmon (Oncorhynchus keta) but was one of the least common harpacticoid copepods in the estuary. The productivity of H. uniremis was found to be only slightly greater than the calculated food requirement of the chum salmon fry; there was close coupling between prey and predator. The role of detritus and bacterially processed carbon in the feeding of H. uniremis are discussed. Key words: harpacticoid copepods, secondary production, detritus, Harpacticus uniremis, turnover ratios, meiofauna

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Role of the Trunk Musculatures in Oviposition of Chum Salmon, Oncorhynchus keta

NIPPON SUISAN GAKKAISHI ◽

10.2331/suisan.46.395 ◽

1980 ◽

Vol 46 (4) ◽

pp. 395-400 ◽

Cited By ~ 12

Author(s):

Kazumasa UEMATSU ◽

Kunio YAMAMORI ◽

Isao HANYU ◽

Takashi HIBIYA

Keyword(s):

Chum Salmon ◽

Oncorhynchus Keta ◽

Chum Salmon Oncorhynchus Keta

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Role of a riverine plume as a nursery area for chum salmon Oncorhynchus keta

Marine Ecology Progress Series ◽

10.3354/meps173289 ◽

1998 ◽

Vol 173 ◽

pp. 289-297 ◽

Cited By ~ 13

Author(s):

M Fukuwaka ◽

T Suzuki

Keyword(s):

Chum Salmon ◽

Nursery Area ◽

Oncorhynchus Keta ◽

Chum Salmon Oncorhynchus Keta

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On the Neutron Transition Magnetic Moment

Physics ◽

10.3390/physics1020021 ◽

2019 ◽

Vol 1 (2) ◽

pp. 271-289 ◽

Cited By ~ 3

Author(s):

Zurab Berezhiani ◽

Riccardo Biondi ◽

Yuri Kamyshkov ◽

Louis Varriano

Keyword(s):

Magnetic Field ◽

Magnetic Moment ◽

Potential Role ◽

Magnetic Moments ◽

Lifetime Measurement ◽

Neutron Lifetime ◽

Transition Magnetic Moment ◽

Average Probability ◽

The Magnetic Field

We discuss the possibility of the transition magnetic moments (TMM) between the neutron n and its hypothetical sterile twin “mirror neutron” n′ from a parallel particle “mirror” sector. The neutron can be spontaneously converted into mirror neutron via the TMM (in addition to the more conventional transformation channel due to n−n′ mass mixing) interacting with the magnetic field B as well as with mirror magnetic field B′. We derive analytic formulae for the average probability of n−n′ conversion and consider possible experimental manifestations of neutron TMM effects. In particular, we discuss the potential role of these effects in the neutron lifetime measurement experiments leading to new, testable predictions.

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Effect of modified magnetic field on the ocean migration of maturing chum salmon, Oncorhynchus keta

Marine Biology ◽

10.1007/s002270050193 ◽

1997 ◽

Vol 129 (3) ◽

pp. 523-530 ◽

Cited By ~ 19

Author(s):

A. Yano ◽

M. Ogura ◽

A. Sato ◽

Y. Sakaki ◽

Y. Shimizu ◽

...

Keyword(s):

Magnetic Field ◽

Chum Salmon ◽

Oncorhynchus Keta ◽

Chum Salmon Oncorhynchus Keta

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What Density of Magnetosheath Sodium Ions Can Provide the Observed Decrease in the Magnetic Field of the “Double Magnetopause” during the First MESSENGER Flyby?

Symmetry ◽

10.3390/sym13071168 ◽

2021 ◽

Vol 13 (7) ◽

pp. 1168

Author(s):

Elena Belenkaya ◽

Ivan Pensionerov

Keyword(s):

Magnetic Field ◽

Analytical Approach ◽

Field Structure ◽

Sodium Ions ◽

Plasma Parameters ◽

Calculation Results ◽

Magnetizing Current ◽

The Magnetic Field ◽

Density Excess

On 14 January 2008, the MESSENGER spacecraft, during its first flyby around Mercury, recorded the magnetic field structure, which was later called the “double magnetopause”. The role of sodium ions penetrating into the Hermean magnetosphere from the magnetosheath in generation of this structure has been discussed since then. The violation of the symmetry of the plasma parameters at the magnetopause is the cause of the magnetizing current generation. Here, we consider whether the change in the density of sodium ions on both sides of the Hermean magnetopause could be the cause of a wide diamagnetic current in the magnetosphere at its dawn-side boundary observed during the first MESSENGER flyby. In the present paper, we propose an analytical approach that made it possible to determine the magnetosheath Na+ density excess providing the best agreement between the calculation results and the observed magnetic field in the double magnetopause.

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