ムラサキイガイの換水に及ぼす塩分低下の影響

Effect of Low Salinity on Ventilation in the Mediterranean Blue Mussel Mytilus galloprovincialis

Creators Yamamoto Ken-ichi

Creators Araki Akira

Creators Handa Takeshi

Effects of low salinity on ventilation volume and ciliary movement were examined in the Mediterranean blue mussel Mytilus galloprovincialis at 13, 20, 25 and 28℃. The ventilation volume was measured by using a direct measurement method. The ciliary movement was shown indirectly by the transportation velocity of a piece of vinyl film (2.0 mm diameter, 0.3 mm thickness) put on the gill surface. At each temperature, the ventilation volumes in 30 psu were the same as those in 34 psu, and were shown zerol/min/kg WW at 18.6 psu when the salinity decreased. The transportation velocities in 20 psu at 13 and 20℃, and in 25 psu at 25 and 28℃ were the same as those in 34 psu, and the velocities were zero mm/min in 2 psu at 13, 20 and 25℃, and in 9 psu at 28℃ when the salinity decreased.

[ISSN]0370-9361