scholarly journals Lead isotope provinciality of central North Pacific Deep Water over the Cenozoic

2013 ◽  
Vol 14 (5) ◽  
pp. 1523-1537 ◽  
Author(s):  
Tian-Yu Chen ◽  
Hong-Fei Ling ◽  
Rong Hu ◽  
Martin Frank ◽  
Shao-Yong Jiang
Keyword(s):  
Deep Water ◽  
North Pacific ◽  
Lead Isotope ◽  
North Pacific Deep Water ◽  
Central North Pacific

Convection of North Pacific deep water during the early Cenozoic

Geology ◽  
2012 ◽  
Vol 40 (6) ◽  
pp. 527-530 ◽  
Author(s):  
A. M. Hague ◽  
D. J. Thomas ◽  
M. Huber ◽  
R. Korty ◽  
S. C. Woodard ◽  
...  
Keyword(s):  
Deep Water ◽  
North Pacific ◽  
North Pacific Deep Water ◽  
Early Cenozoic

Lead isotopes in North Pacific deep water – implications for past changes in input sources and circulation patterns

2003 ◽  
Vol 209 (1-2) ◽  
pp. 149-164 ◽  
Author(s):  
Tina van de Flierdt ◽  
Martin Frank ◽  
Alex N. Halliday ◽  
James R. Hein ◽  
Bodo Hattendorf ◽  
...  
Keyword(s):  
Deep Water ◽  
North Pacific ◽  
Lead Isotopes ◽  
Circulation Patterns ◽  
North Pacific Deep Water

Growth and spatiotemporal distribution of juvenile shortfin mako (Isurus oxyrinchus) in the western and central North Pacific

2015 ◽  
Vol 66 (12) ◽  
pp. 1176 ◽  
Author(s):  
M. Kai ◽  
K. Shiozaki ◽  
S. Ohshimo ◽  
K. Yokawa
Keyword(s):  
North Pacific ◽  
Linear Models ◽  
North Pacific Ocean ◽  
Age Groups ◽  
Growth Curves ◽  
Growth Function ◽  
Gaussian Mixture ◽  
Isurus Oxyrinchus ◽  
Shortfin Mako ◽  
Central North Pacific

This paper presents an estimation of growth curves and spatiotemporal distributions of juvenile shortfin mako shark (Isurus oxyrinchus) in the western and central North Pacific Ocean using port sampling data collected from 2005 to 2013. The monthly length compositions show a clear transition of three modes in the size range of smaller than 150-cm precaudal length (PCL), which were believed to represent the growth of age-0 to age-2 classes, and they were then decomposed into age groups by fitting a Gaussian mixture distribution. Simulation data of lengths at monthly ages were generated from the mean and standard deviation of each distribution, and fit with a von Bertalanffy growth function. Parameters of the estimated growth curves for males and females were 274.4 and 239.4cm PCL for the asymptotic length and 0.19 and 0.25 year–1 for the growth coefficient indicating apparently faster growth than previously reported. Generalised linear models were applied to age-0 to explore the seasonal changes of PCL by area. They were born during late autumn and winter off the coast of north-eastern Japan, an area known to have relatively high productivity compared with other pelagic areas, and gradually expanded their habitat eastward and northward with the seasons as they grew.

The Reproductive Biology of Ophiacantha Bidentata (Echinodermata: Ophiuroidea) From The Rockall Trough

1982 ◽  
Vol 62 (1) ◽  
pp. 45-55 ◽  
Author(s):  
P. A. Tyler ◽  
J. D. Gage
Keyword(s):  
Reproductive Biology ◽  
Deep Water ◽  
Larval Stage ◽  
North Pacific ◽  
Deep Sea ◽  
Direct Development ◽  
The Arctic ◽  
Shallow Waters ◽  
Arctic Seas ◽  
Rockall Trough

INTRODUCTIONOphiacantha bidentata (Retzius) is a widespread arctic-boreal ophiuroid with a circumpolar distribution in the shallow waters of the Arctic seas and penetrating into the deep sea of the.North Atlantic and North Pacific (Mortensen, 1927, 1933a; D'yakonov, 1954). Early observations of this species were confined to defining zoogeo-graphical and taxonomic criteria including the separation of deep water specimens as the variety fraterna (Farran, 1912; Grieg, 1921; Mortensen, 1933a). Mortensen (1910) and Thorson (1936, pp. 18–26) noted the large eggs (o.8 mm diameter) in specimens from Greenland and Thorson (1936) proposed that this species had ‘big eggs rich in yolk, shed directly into the sea. Much reduced larval stage or direct development’. This evidence is supported by observations of O. bidentata from the White and Barents Seas (Semenova, Mileikovsky & Nesis, 1964; Kaufman, 1974)..

Lagrangian statistics in the central North Pacific

2001 ◽  
Vol 29 (1-4) ◽  
pp. 141-155 ◽  
Author(s):  
Rick Lumpkin ◽  
Pierre Flament
Keyword(s):  
North Pacific ◽  
Lagrangian Statistics ◽  
Central North Pacific
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