scholarly journals Survey of the Japanese Coast Reveals Abundant Placozoan Populations in the Northern Pacific Ocean

2014 ◽  
Vol 4 (1) ◽  
Author(s):  
Hiroaki Nakano
Keyword(s):  
Pacific Ocean ◽  
Japanese Coast ◽  
Northern Pacific

Population genetics, phylogeography, and systematics of the thornyhead rockfishes (Sebastolobus) along the deep continental slopes of the North Pacific Ocean

2000 ◽  
Vol 57 (8) ◽  
pp. 1701-1717 ◽  
Author(s):  
Carol A Stepien ◽  
Alison K Dillon ◽  
Amy K Patterson
Keyword(s):  
Pacific Ocean ◽  
Phylogenetic Trees ◽  
Sequence Data ◽  
North Pacific Ocean ◽  
Geographic Distance ◽  
The North ◽  
Continental Slopes ◽  
Genetic Patterns ◽  
Northern Pacific ◽  
Shortspine Thornyhead

Population genetic, phylogeographic, and systematic relationships are elucidated among the three species comprising the thornyhead rockfish genus Sebastolobus (Teleostei: Scorpaenidae). Genetic variation among sampling sites representing their extensive ranges along the deep continental slopes of the northern Pacific Ocean is compared using sequence data from the left domain of the mtDNA control region. Comparisons are made among the shortspine thornyhead (S. alascanus) (from seven locations), the longspine thornyhead (S. altivelis) (from five sites), which are sympatric in the northeast, and the broadbanded thornyhead (S. macrochir) (a single site) from the northwest. Phylogenetic trees rooted to Sebastes show that S. macrochir is the sister taxon of S. alascanus and S. altivelis. Intraspecific genetic variability is appreciable, with most individuals having unique haplotypes. Gene flow is substantial among some locations and others diverged significantly. Genetic divergences among sampling sites for S. alascanus indicate an isolation by geographic distance pattern. Genetic divergences for S. altivelis are unrelated to the hypothesis of isolation by geographic distance and appear to be more consistent with the hypothesis of larval retention in currents and gyres. Differences in geographic genetic patterns between the species are attributed to life history differences in their relative mobilities as juveniles and adults.

scholarly journals Cloud representation in general-circulation models over the northern Pacific Ocean: A EUROCS intercomparison study

2004 ◽  
Vol 130 (604) ◽  
pp. 3245-3267 ◽  
Author(s):  
A.P. Siebesma ◽  
C. Jakob ◽  
G. Lenderink ◽  
R.A.J. Neggers ◽  
J. Teixeira ◽  
...  
Keyword(s):  
Pacific Ocean ◽  
General Circulation ◽  
General Circulation Models ◽  
Northern Pacific ◽  
Intercomparison Study

Associations between seabirds and water-masses in the northern Pacific Ocean in summer

1989 ◽  
Vol 103 (1) ◽  
pp. 1-11 ◽  
Author(s):  
T. R. Wahl ◽  
D. G. Ainley ◽  
A. H. Benedict ◽  
A. R. DeGange
Keyword(s):  
Pacific Ocean ◽  
Water Masses ◽  
Northern Pacific

Gonadal histology and serum vitellogenin levels of bigeye tuna Thunnus obesus from the Northern Pacific Ocean––absence of endocrine disruption bio-indicators

2003 ◽  
Vol 46 (4) ◽  
pp. 459-465 ◽  
Author(s):  
Shinya Hashimoto ◽  
Ryo Kurihara ◽  
Carlos Augusto Strüssmann ◽  
Tsugiko Yamasaki ◽  
Kiyoshi Soyano ◽  
...  
Keyword(s):  
Pacific Ocean ◽  
Endocrine Disruption ◽  
Bigeye Tuna ◽  
Thunnus Obesus ◽  
Gonadal Histology ◽  
Northern Pacific

A new species of the mesopelagic isopod genus Xenuraega Tattersall, 1909 (Crustacea: Isopoda: Aegidae) from Japan, the second species in the genus

Zootaxa ◽  
2019 ◽  
Vol 4683 (3) ◽  
pp. 431-438
Author(s):  
MICHITAKA SHIMOMURA ◽  
NIEL L. BRUCE
Keyword(s):  
New Species ◽  
Pacific Ocean ◽  
North Atlantic ◽  
Type Locality ◽  
Single Specimen ◽  
Southern Japan ◽  
Kagoshima Prefecture ◽  
Northern Pacific ◽  
A New Species

Xenuraega bythionekta sp. nov., is described from a single specimen taken off southern Japan. It is the second species of Xenuraega Tattersall, 1909, and extends the known range of the genus from North Atlantic to the northern Pacific Ocean. The species is characterized by the posteriorly narrowed pleotelson, and both uropodal rami being elongate and provided with a mass of long plumose setae. Xenuraega bythionekta sp. nov. is known only from the type locality, Kagoshima Prefecture, southern Japan at a depth of 1178–1179 m. 

Population dynamics and status of striped marlin (Kajikia audax) in the western and central northern Pacific Ocean

2013 ◽  
Vol 64 (2) ◽  
pp. 108 ◽  
Author(s):  
Kevin R. Piner ◽  
Hui-Hua Lee ◽  
Ai Kimoto ◽  
Ian G. Taylor ◽  
Minoru Kanaiwa ◽  
...  
Keyword(s):  
Population Dynamics ◽  
Pacific Ocean ◽  
Spatial Data ◽  
Large Scale ◽  
Size Composition ◽  
Maximum Sustainable Yield ◽  
Catch Per Unit Effort ◽  
Fully Integrated ◽  
Northern Pacific ◽  
Spawning Biomass

A new understanding of the structure of striped marlin stocks in the Pacific Ocean was the basis for estimating the population dynamics in the western and central northern Pacific (1975–2010). Dynamics were estimated using large-scale spatial data and a fully integrated length-based and age-structured model. The model used fishery-dependent catch, size composition and catch per unit effort (CPUE) as likelihood components. Time-varying selectivity patterns were used in the modelling to account for changes in fishing practices. Estimates of fishing intensity showed a pattern of exploitation generally exceeding the levels associated with maximum sustainable yield (MSY). Estimates of spawning biomass and recruitment described a population that was relatively stable near biomass levels associated with MSY until the 1990s, when recruitment declined and biomass levels fell below those associated with MSY. The reduction in recruitment could be explained by a loss of spawning biomass and potentially changes in environment. The future prospects of rebuilding the stock will depend on the relative importance of the roles maternal biomass and environment play in determining recruitment strength.

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