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『Projects』

　　(1) Population genetics by using a variety of molecular techniques (mtDNA sequenses, allozymes, microsatellites, AFLPs, etc.)
　　(2) Stream habitat structure on fish abundance
　　(3) Genetical and Ecological effects of non-indigenous species/populations
　　(4) Genetic differentiation in ecological traits
　　(5) Breeding Science
　　(6) Genetic management of blood stock for aquaculture

『Population genetics』

　 We examine the potential difference in ecological traits between amphidromous and landlocked forms of ayu.
　 The number of territorial individuals per total experimental individuals (No. TI/EI) for each temperature was
evidently different between the two forms. The maximum value was 21℃ in the landlosked form, and at 24℃ in
the amphidromous form.
　 We propose that the two forms are genetically different geographical races. Those differences were important
to utilitize those genetic stock efficiently.
　 It’s important for the stock enhancement programs to keep the form-specific characteristics of each geographical
race for prevention of genetic introgressions in the original stocks.
　 Our projects examine questions related to population structure and genetic variance in fish.

　　And, I am also interested in Filosophy (Fish philosophy).

　The left figure is "Clade compositions of Ryncocypris oxycephalus in Shikoku".(Okino et al., 2012)

　1. Monobe R.；　2. None R.；　3. Kaifu R.；　4. Naka R.；　5. Katsuura R.；　6. Yoshino R.；　7. Doki R.；
　8. Kamo R.；　9. Shigenobu R.；　10. Hiji R.；　11. Shimanto R.；　12. Niyodo R.；　13. Kagami R.　

　・　Phylogenetic relationships of Upstream fat minnow Rhynchocypris oxycephalus
　・　Phylogenetic relationships of Downstream fat minnow Rhynchocypris lagowskii
　・　Phylogenetic relationships of Blackstripe shiner Pungtungia herzi
　・　Phylogenetic relationships of Amago salmon Oncorhyncus masou ishikawae
　・　Phylogenetic relationships of Flathead mullet Mugil cephalus
　・　Phylogenetic relationships of Nibe croaker Nibea mitsukurii
　・　Phylogenetic relationships of Rockfish Sebastiscus marmoratus
　・　Phylogenetic relationships of White-striped blue sprat Spratelloides gracilis
　・　Phylogenetic relationships of　Goldfish

『Conservation Biology』

　Current projects:

• 　Effects of dams in stream babitat structure on macroinvertebrates abundance

『Effects of non-indigenous species/populations』

　Current projects:

　・　Effects of introduced white-spotted charr on indigenous species through interspecific competition
　・　Introgression of freshwater fish from the Yoshino River system to the Zaita River system through an aqueduct of the Kagawa Yousui

『Breeding Science』

• Tilapia sex determination (hormone treated rearing/ temperature-induced sex)

• Detection of ayu sex-linked DNA
• Linkage map based on microsatellite DNA and AFLP (ayu and tilapia)

『Genetic managements』

• Ecology of Penaeus semisulcatus

• Tracking the released ayu of landlocked form
• Feeding habit of juvenile Japanese flounder at shallow and sandy beaches