Canadian Blood Services officials on P.E.I. say the number of blood donations is down and they are asking Islanders to help replenish the inventory.

They say donations typically decline this time of year but the demand for blood remains constant.

"The collections were down over the long weekend as they usually are," said Lisa Rusk, community development co-ordinator with Canadian Blood Services in Charlottetown.

"People are busy with other things - gardening and visiting family and traveling - and actually just coming out of the long weekend we would really appreciate some donors to come in and fill in some empty spots that we have."

There is a need for all blood types but the greatest need is for O negative. It's the only type of blood that is compatible with all others.

The clinic in Charlottetown will be open Tuesday evening until 8 p.m., Wednesday afternoon from noon until 4 p.m., and on Friday from 9 a.m. until 1 p.m. to receive donations.