In the ordinary dich

Pungitius sp.

After my survey I traveled around Akita pref., northern part of Japan,searching for ninespine stickleback, Pungitius sp.. By several hours search,I could find them in the narrow ditch. Japan is the northern limit of their distribution. In the south part of Japan, their habitat was dependent on spring cold water and the populations of Kinki region were already extinct because of the disappearance of it. In the high elevation area of north Japan,the water is cold even in summer and they would have been able to live such ordinary concrete dich. This species strongly impress me the vulnerability of distribution edge populations.

Narrow concrete