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Changes in inferred spawning areas of Todarodes pacificus (Cephalopoda: Ommastrephidae) due to changing environmental conditions
Annual catches of Todarodes pacificus in Japan have gradually increased since the late 1980s. Paralarval abundances have also been higher since the late 1980s compared to the late 1970s andExpand
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An overview of the Oyashio ecosystem
The Oyashio shelf region and the seasonally ice-covered areas north of Hokkaido are highly productive, supporting a wide range of species including marine mammals, seabirds and commercially importantExpand
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15. Reproductive Characteristics and Effects of Temperature and Salinity on the Development and Survival of Eggs and Larvae of Arctic Cod (Boreogadus saida)
In the summers of 1991 and 1992, live Arctic cod (Boreogadus saida) captured by bottom trawling south of St. Lawrence Island were transported to a laboratory at Hakodate, Hokkaido, Japan, when theyExpand
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Deep phylogeographic break among white croaker Pennahia argentata (Sciaenidae, Perciformes) populations in North-western Pacific
The Quaternary cold periods in the North-western Pacific are thought to have greatly influenced the genetic structures of marine species. One hundred and thirty-two individuals of white croakerExpand
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Genetic population structure of Nibea albiflora in Yellow Sea and East China Sea
The population genetic structure and level of gene flow of Nibea albiflora from the Yellow Sea and the East China Sea were examined with a 479-bp segment of a mtDNA control region. In total, 65Expand
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Genetic diversity in the mtDNA control region and population structure in the small yellow croaker Larimichthys polyactis
The genetic diversity and population genetic structure of the small yellow croaker (Larimichthys polyactis) were investigated. One hundred and fourteen individuals were sampled from 8 localities ofExpand
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Dependance of paternity rates on alternative reproductive behaviors in the squid Loligo bleekeri
The mating behavior of captive Loligo bleekeri and the paternity of the resulting prog- eny were examined based on behavioral observations and genetic analyses. In this species, there are 3 matingExpand
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Development of the ommastrephid squid Todarodes pacificus, from fertilized egg to the rhynchoteuthion paralarva
The present study establishes for the first time an atlas for the normal development of Todarodes pacificus Steenstrup, 1880, from fertilized egg to rhynchoteuthion paralarva. In the course of theExpand
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Laboratory observations on Todarodes pacificus (Cephalopoda: Ommastrephidae) egg masses
Two egg masses of the ommastrephid squid Todarodes pacific us (Steenstrup, 1880) are described. Immature squid were collected from inshore waters of southern Hokkaido, Japan, and maintained in aExpand
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Remarkably low mtDNA control-region diversity and shallow population structure in Pacific cod Gadus macrocephalus.
To investigate the genetic diversity and describe the population structure in Gadus macrocephalus, a 452 base pair (bp) fragment of the mitochondrial DNA control region was analysed in 259Expand
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