scholarly journals The Utilization of Cold-water Zooplankton as Prey for Chum Salmon Fry in Yamada Bay, Iwate, Pacific Coast of Northern Japan

2021 ◽  
Author(s):  
Yuichiro Yamada ◽  
Kei Sasaki ◽  
Kodai Yamane ◽  
Miwa Yatsuya ◽  
Yuichi Shimizu ◽  
...  
Keyword(s):  
Chum Salmon ◽  
Pacific Coast ◽  
Cold Water ◽  
Salmon Fry ◽  
Northern Japan

The utilization of cold-water zooplankton as prey for chum salmon fry (Oncorhynchus keta) in Yamada Bay, Iwate, Pacific coast of northern Japan

2019 ◽  
Vol 29 ◽  
pp. 100633
Author(s):  
Yuichiro Yamada ◽  
Kei Sasaki ◽  
Kodai Yamane ◽  
Miwa Yatsuya ◽  
Yuichi Shimizu ◽  
...  
Keyword(s):  
Chum Salmon ◽  
Pacific Coast ◽  
Cold Water ◽  
Oncorhynchus Keta ◽  
Salmon Fry ◽  
Northern Japan

Influence of Temperature, Salinity, and Photoperiod on the Aggregations of Chum Salmon Fry (Oncorhynchus keta)

1966 ◽  
Vol 23 (2) ◽  
pp. 293-304 ◽  
Author(s):  
J. E. Shelbourn
Keyword(s):  
Fresh Water ◽  
Chum Salmon ◽  
Cold Water ◽  
Salt Water ◽  
Oncorhynchus Keta ◽  
Influence Of Temperature ◽  
Hatchery Stock ◽  
Salmon Fry ◽  
Different Temperatures ◽  
History Of

Underyearling chum fry from hatchery stock were held in fresh water and salt water at two different temperatures and under two different photoperiods and acclimated to these conditions for 40 days before testing started. Aggregations were greater in salt water than in fresh water (p <.01). Fish acclimated to cold water schooled more strongly than those acclimated to warm water but this effect was not considered statistically significant. There were no differences in intensity of aggregation due to photoperiod (p >.05). The significance of these findings is discussed in relation to life history of the fry.

Deepwater Migrations of Chum Salmon (Oncorhynchus keta) along the Pacific Coast of Northern Japan

1992 ◽  
Vol 49 (11) ◽  
pp. 2307-2312 ◽  
Author(s):  
Yasuhiro Ueno
Keyword(s):  
Surface Waters ◽  
Chum Salmon ◽  
Pacific Coast ◽  
Depth Distribution ◽  
Stomach Contents ◽  
Oncorhynchus Keta ◽  
Southern Limit ◽  
Chum Salmon Oncorhynchus Keta ◽  
The Pacific ◽  
Northern Japan

Mature chum salmon (Oncorhynchus keta) were caught in bottom trawls off lwate Prefecture, northern Japan, in autumn. To document the incidence and depth distribution of these catches, records were kept of salmon caught by five trawlers that fished along the Pacific coast of northern Honshu during September–December 1986. During this period, 4337 chum salmon were caught at bottom depths ranging from 150 to 460 m with most taken from 200 to 350 m. Gonads and stomach contents were examined for 100 of these salmon. All were mature and close to spawning. Thirty-nine of the 100 stomachs examined were empty and the remaining 61 contained only a small quantity of food, averaging 2.4 g. Chum salmon may move at these depths to avoid the high temperatures of surface waters (12–20 °C) found in this area and to follow temperatures close to their thermal preferendum (3–11 °C) which are found near bottom. This phenomenon appears to be an adaptation of chum salmon near the southern limit of their range.

Enhanced Chloride Cell Turnover in the Gills of Chum Salmon Fry in Seawater

1996 ◽  
Vol 13 (5) ◽  
pp. 655-660 ◽  
Author(s):  
Katsuhisa Uchida ◽  
Toyoji Kaneko
Keyword(s):  
Chum Salmon ◽  
Chloride Cell ◽  
Cell Turnover ◽  
Salmon Fry

Minor metabolites of the cold water soft coral Gersemia rubiformis

1988 ◽  
Vol 66 (11) ◽  
pp. 2928-2934 ◽  
Author(s):  
David E. Williams ◽  
Raymond J. Andersen ◽  
John F. Kingston ◽  
Alex G. Fallis
Keyword(s):  
Atlantic Ocean ◽  
Spectroscopic Analysis ◽  
Pacific Coast ◽  
Soft Coral ◽  
Cold Water ◽  
Atlantic Coast ◽  
New Metabolites

The minor metabolites of both Pacific and Atlantic Ocean specimens of the cold water soft coral Gersemia rubiformis have been investigated. Pacific coast animals yielded two new pseudopterane diterpenoids, isogersemolides A (11) and B (12), and four new cembrane diterpenoids, isoepilophodiones A (13), B (14), and C (15) and rubifol (16). Atlantic coast animals yielded 3-acetoxy-β-cubebene (17). The proposed structures of all the new metabolites are based on spectroscopic analysis and chemical interconversions.

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