scholarly journals Downstream Migration and Spatial Distribution of Juvenile Chum Salmon in the Otsuchi Bay, the Sanriku Coast of Iwate, Japan

2021 ◽  
Author(s):  
Tatsuya Kawakami ◽  
Yuki Minegishi ◽  
Jun Aoyama
Keyword(s):  
Spatial Distribution ◽  
Chum Salmon ◽  
Downstream Migration ◽  
Sanriku Coast ◽  
Otsuchi Bay ◽  
Juvenile Chum Salmon

Characterization of feeding and downstream migration of juvenile chum salmon in the Kichiga river (north-eastern kamchatka)

2021 ◽  
pp. 39-50
Author(s):  
E. S. Voronova ◽  
T. N. Travina ◽  
A. M. Biryukov
Keyword(s):  
Chum Salmon ◽  
Hydrological Regime ◽  
Downstream Migration ◽  
Juvenile Survival ◽  
Salmon Juvenile ◽  
North Eastern ◽  
Juvenile Chum Salmon ◽  
First Time ◽  
Qualitative Characteristics

Analysis of the data of fish biology spring-summer researches in the Kichiga river basin in the period 2017–2019 for the first time brought results as next: characterized dynamics of chum salmon juvenile downstrean migration, including daily dynamics, revealed qualitative characteristics of the underyearlings, described diet of the juvenile migrants, demonstrated effects of the spring-summer hydrological regime on the intensity of the underyearling feeding. Also noted, that the conditions for the downstream migration of chum salmon in 2018 were maximum favouravle, and most likely that could enhance later juvenile survival.

scholarly journals Ⅲ-3. Abundance and habitats of juvenile chum salmon and their adult return in the Sanriku coast

2018 ◽  
Vol 84 (5) ◽  
pp. 928-928
Author(s):  
TAKUYA KAWASHIMA ◽  
YUICHI SHIMIZU ◽  
KATSUHIKO OHTA ◽  
KOUDAI YAMANE
Keyword(s):  
Chum Salmon ◽  
Sanriku Coast ◽  
Juvenile Chum Salmon

scholarly journals Spatiotemporal distribution of juvenile chum salmon in Otsuchi Bay, Iwate, Japan, inferred from environmental DNA

PLoS ONE ◽  
2019 ◽  
Vol 14 (9) ◽  
pp. e0222052 ◽  
Author(s):  
Yuki Minegishi ◽  
Marty Kwok-Shing Wong ◽  
Takashi Kanbe ◽  
Hitoshi Araki ◽  
Tomomi Kashiwabara ◽  
...  
Keyword(s):  
Chum Salmon ◽  
Environmental Dna ◽  
Spatiotemporal Distribution ◽  
Otsuchi Bay ◽  
Juvenile Chum Salmon

scholarly journals Neural Stem Cells/Neuronal Precursor Cells and Postmitotic Neuroblasts in Constitutive Neurogenesis and After ,Traumatic Injury to the Mesencephalic Tegmentum of Juvenile Chum Salmon, Oncorhynchus keta

2020 ◽  
Vol 10 (2) ◽  
pp. 65
Author(s):  
Pushchina ◽  
Kapustyanov ◽  
Varaksin
Keyword(s):  
Stem Cells ◽  
Neural Stem Cells ◽  
Progenitor Cells ◽  
Chum Salmon ◽  
Precursor Cells ◽  
Oncorhynchus Keta ◽  
Neuronal Precursor ◽  
Chum Salmon Oncorhynchus Keta ◽  
Neuronal Precursor Cells ◽  
Juvenile Chum Salmon

The proliferation of neural stem cells (NSCs)/neuronal precursor cells (NPCs) and the occurrence of postmitotic neuroblasts in the mesencephalic tegmentum of intact juvenile chum salmon, Oncorhynchus keta, and at 3 days after a tegmental injury, were studied by immunohistochemical labeling. BrdU+ constitutive progenitor cells located both in the periventricular matrix zone and in deeper subventricular and parenchymal layers of the brain are revealed in the tegmentum of juvenile chum salmon. As a result of traumatic damage to the tegmentum, the proliferation of resident progenitor cells of the neuroepithelial type increases. Nestin-positive and vimentin-positive NPCs and granules located in the periventricular and subventricular matrix zones, as well as in the parenchymal regions of the tegmentum, are revealed in the mesencephalic tegmentum of juvenile chum salmon, which indicates a high level of constructive metabolism and constitutive neurogenesis. The expression of vimentin and nestin in the extracellular space, as well as additionally in the NSCs and NPCs of the neuroepithelial phenotype, which do not express nestin in the control animals, is enhanced during the traumatic process. As a result of the proliferation of such cells in the post-traumatic period, local Nes+ and Vim+ NPCs clusters are formed and become involved in the reparative response. Along with the primary traumatic lesion, which coincides with the injury zone, additional Nes+ and Vim+ secondary lesions are observed to form in the adjacent subventricular and parenchymal zones of the tegmentum. In the lateral tegmentum, the number of doublecortin-positive cells is higher compared to that in the medial tegmentum, which determines the different intensities and rates of neuronal differentiation in the sensory and motor regions of the tegmentum, respectively. In periventricular regions remote from the injury, the expression of doublecortin in single cells and their groups significantly increases compared to that in the damage zone.

Juvenile chum salmon consumption of zooplankton in marine waters of southeastern Alaska: a bioenergetics approach to implications of hatchery stock interactions

2004 ◽  
Vol 14 (3) ◽  
pp. 335-359 ◽  
Author(s):  
Joseph A. Orsi ◽  
Alex C. Wertheimer ◽  
Molly V. Sturdevant ◽  
Emily A. Fergusson ◽  
Donald G. Mortensen ◽  
...  
Keyword(s):  
Chum Salmon ◽  
Marine Waters ◽  
Hatchery Stock ◽  
Juvenile Chum Salmon
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