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Search: authors:"Makoto Okazaki"

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Effects of hydrographic conditions on the transport of neon flying squid Ommastrephes bartramii larvae in the North Pacific Ocean

The neon flying squid, Ommastrephes bartramii, is widespread in subtropical and temperate regions. In the North Pacific Ocean, the species is comprised of two spawning cohorts; an autumn cohort and a winter-spring cohort. Interestingly, despite their apparently contiguous hatching periods, there is a marked disparity in the mantle length of both cohorts. We hypothesized that...

Light-Sensitive Vertical Migration of the Japanese Eel Anguilla japonica Revealed by Real-Time Tracking and Its Utilization for Geolocation

Short-time tracking (one to eight days) of the Japanese eel (Anguilla japonica) using ultrasonic transmitter was performed in the tropical-subtropical area adjacent to the spawning area and temperate area off the Japanese Archipelago. Of 16 eels (11 wild and five farmed) used, 10 wild eels displayed clear diel vertical migration (DVM) from the beginning, while the other five...

Discovery of a spawning area of the common Japanese conger Conger myriaster along the Kyushu-Palau Ridge in the western North Pacific

The common Japanese conger Conger myriaster is an important commercial coastal fisheries species in East Asia, but its spawning area has not been determined. A larval sampling survey was conducted in September 2008 along 136°E between 13°N and 22°N, which roughly followed the Kyushu-Palau Ridge in the western North Pacific. Twenty larval specimens were confirmed to be C...

Genetic Isolation between the Western and Eastern Pacific Populations of Pronghorn Spiny Lobster Panulirus penicillatus

The pronghorn spiny lobster, Panulirus penicillatus, is a circumtropical species which has the widest global distribution among all the species of spiny lobster, ranging throughout the entire Indo-Pacific region. Partial nucleotide sequences of mitochondrial DNA COI (1,142–1,207 bp) and 16S rDNA (535–546 bp) regions were determined for adult and phyllosoma larval samples...

Mapping of the genes around MEN2A locus using pulsed-field gel electrophoresis

The gene for multiple endocrine neoplasia type 2A (MEN 2A) is closely linked to RBP3 (retinol-binding protein 3, interstitial, probe IRBP.H4) and the DNA marker D10S15 (probe pMCK2), which have been assigned to the proximal long arm of chromosome 10 by linkage analysis both in Caucasian and Japanese populations. We have constructed a rare-cutting restriction map around the RBP3...

A Theory of the Magneto-Optical Absorption

Makoto OKAZAKI 0 0 Department of Physics, Faculty of Science University of Tokyo , Tokyo A theory of the magneto-optical absorption is developed by means of the Luttinger and Kohn theory of the

Preclinical detection of men 2A gene carrier using linked DNA markers

We have performed preclinical risk estimation of multiple endocrine neoplasia type 2A (MEN 2A) by using the polymorphic DNA markers tightly linked to the MEN2A locus. The gene for MEN 2A has been assigned to the pericentromeric region of chromosome 10 by linkage analysis. The preclinical detection of gene carriers in MEN 2A families using tightly linked DNA markers is useful for...

The zygosity determination of Japanese twins using a minisatellite core probe

Hypervariable ‘minisatellite’ regions which are dispersed in the human genome show restriction fragment length polymorphisms (RFLPs) due to allelic differences in the number of tandem repeats containing the core sequence. Southern blot hybridization using minisatellite core probes produces various band patterns, which are completely individual-specific and of which few fragments...

Assignment of a polymorphic locus of OS-4(D18S5) DNA segment to human chromosome region 18q21.3→qter

q t e r 0 1 0 Isamu NISHISHO,1 FIideo TATEISHI,1 K a z u y o s h i MOTOMURA , 1 Tetsuro MIKI,2 Michihiro C. YOSHIDA , ~ Tatsuro I~r 4 Kohtaro YAMAMOFO , 4 Makoto OKAZAKI,1 Shin-ichiro TAKAI,1 and