scholarly journals Geographical Origins of Juvenile Chum Salmon Migrating Along the Pacific Coast of Hokkaido, Japan, During Early Summer

2018 ◽  
Keyword(s):  
Chum Salmon ◽  
Pacific Coast ◽  
Early Summer ◽  
The Pacific ◽  
Juvenile Chum Salmon

scholarly journals Early Marine Migration of Juvenile Chum Salmon Along the Pacific Coast of Eastern Hokkaido

2016 ◽  
Vol 6 (1) ◽  
pp. 61-72 ◽  
Author(s):  
Kiyoshi Kasugai ◽  
Hayato Saneyoshi ◽  
Tomoya Aoyama ◽  
Yoshihito Shinriki ◽  
Anai Iijima ◽  
...  
Keyword(s):  
Chum Salmon ◽  
Pacific Coast ◽  
The Pacific ◽  
Marine Migration ◽  
Juvenile Chum Salmon

scholarly journals Early Marine Migration of Juvenile Chum Salmon Along the Pacific Coast of Eastern Hokkaido

2016 ◽  
Vol 6 (1) ◽  
pp. 61-72
Author(s):  
Kiyoshi Kasugai ◽  
Hayato Saneyoshi ◽  
Tomoya Aoyama ◽  
Yoshihito Shinriki ◽  
Anai Iijima ◽  
...  
Keyword(s):  
Chum Salmon ◽  
Pacific Coast ◽  
The Pacific ◽  
Marine Migration ◽  
Juvenile Chum Salmon

LIFE HISTORY STUDIES OF THE PACIFIC COAST MARINE ALGA, COLLINSIELLA TUBERCULATA SETCHELL AND GARDNER

1960 ◽  
Vol 38 (6) ◽  
pp. 969-983 ◽  
Author(s):  
Robert F. Scagel
Keyword(s):  
Life History ◽  
Pacific Coast ◽  
Late Summer ◽  
Systematic Position ◽  
Early Summer ◽  
Morphological Data ◽  
Sexual Life ◽  
Enteromorpha Intestinalis ◽  
The Pacific ◽  
Successive Generations

Culture studies of a marine green alga, described from the Pacific Coast of North America as Collinsiella tuberculata Setchell and Gardner, have shown it to be a stage in the life history of a form of Enteromorpha intestinalis (L.) Link. The Collinsiella-stage is thought to be the sexual phase, or a basal remnant of the Enteromorpha-stage, and produces biflagellate gametes. The typical tubular thallus of Enteromorpha has been grown in culture from zygotes of the Collinsiella-stage and zoospores of the Enteromorpha-stage. Parthenogenetic development of gametes is also indicated. Some of the tubular plants produce biflagellate gametes which cannot be distinguished from those of the Collinsiella-stage. Others produce quadriflagellate zoospores, which may be meiospores or mitospores. An accessory method of reproduction by quadriflagellate mitospores (neutral spores) occurs and this asexual cycle has been carried through three successive generations in culture without an intervening sexual phase. Tubular thalli of Enteromorpha inteslinalis (L.) Link producing biflagellate gametes during the spring and early summer and quadriflagellate zoospores during the late summer are found in nature in the same area from which the Collinsiella-stage was obtained. These are believed to represent in nature the normal sexual life cycle of this plant, which has been reported to have an alternation of isomorphic generations. The possible relationships between the stages obtained in culture and those observed in nature are discussed. A number of hypothetical conclusions have been drawn with respect to the systematic position of the genus Enteromorpha and related genera. These studies are being continued to clarify several unknown aspects brought out by this preliminary study. A cytological study is being undertaken to substantiate the conclusions drawn from the morphological data.

scholarly journals SPATIAL ESTIMATION OF EUPHAUSIID BIOMASS ALONG THE PACIFIC COAST OF EASTERN HOKKAIDO, JAPAN IN EARLY SUMMER OF 2008

2011 ◽  
Vol 19 (3) ◽  
Author(s):  
Naoki Tojo ◽  
Kenji Minami ◽  
Ryuichi Matsukura ◽  
Yohei Kawauchi ◽  
Tetsuichiro Funamoto ◽  
...  
Keyword(s):  
Pacific Coast ◽  
Early Summer ◽  
Spatial Estimation ◽  
The Pacific
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