TY - JOUR

T1 - Effect of salinity-changing rates on filtration activity of mussels from two sites within the Baltic Mytilus hybrid zone

T2 - The Brackish Great Belt (Denmark) and the Low Saline Central Baltic Sea

AU - Riisgard, Hans Ulrik

AU - Mulot, Magali

AU - Merino, Lucia

AU - Pleißner, Daniel

PY - 2014/1/1

Y1 - 2014/1/1

N2 - Mussels from two sites within the Baltic mussel (Mytilus edulis × M. trossulus) hybrid zone were used in a comparative study on the effects of salinity-changing rates on filtration activity. The acute effect of varying salinity-changing rates was found to be similar in M. edulis from the brackish Great Belt and in M. trossulus from the low saline Central Baltic Sea, and the relationships could be described by linear regression lines through 0.0 indicating that the acute effect of deteriorating conditions at decreasing salinities is the opposite as for improving conditions when the salinity is subsequently increased. Further, both M. edulis and M. trossulus acclimatized to 20 psu reacted to an acute salinity change to 6.5 psu by immediately closing their valves whereupon the filtration rate gradually increased during the following days, but only M. trossulus had completely acclimatized to 6.5 psu within 5 days which may be explained by different genotypes of M. edulis and M. trossulus which probably reflected an evolutionary adaptation of the latter to survive in the stable low-salinity Baltic Sea.

AB - Mussels from two sites within the Baltic mussel (Mytilus edulis × M. trossulus) hybrid zone were used in a comparative study on the effects of salinity-changing rates on filtration activity. The acute effect of varying salinity-changing rates was found to be similar in M. edulis from the brackish Great Belt and in M. trossulus from the low saline Central Baltic Sea, and the relationships could be described by linear regression lines through 0.0 indicating that the acute effect of deteriorating conditions at decreasing salinities is the opposite as for improving conditions when the salinity is subsequently increased. Further, both M. edulis and M. trossulus acclimatized to 20 psu reacted to an acute salinity change to 6.5 psu by immediately closing their valves whereupon the filtration rate gradually increased during the following days, but only M. trossulus had completely acclimatized to 6.5 psu within 5 days which may be explained by different genotypes of M. edulis and M. trossulus which probably reflected an evolutionary adaptation of the latter to survive in the stable low-salinity Baltic Sea.

KW - Biology

KW - Blue Mussels

KW - Mytilus edulis

KW - mytilus trossulus

KW - acute salinity effects

UR - https://www.mendeley.com/catalogue/a6cdaeff-1710-3d51-b208-ada1b3906790/

U2 - 10.4236/ojms.2014.42011

DO - 10.4236/ojms.2014.42011

M3 - Journal articles

VL - 4

SP - 101

EP - 109

JO - Open Journal of Marine Science

JF - Open Journal of Marine Science

SN - 2161-7392

IS - 2

M1 - 44574

ER -