More complaints about out-of-control dogs were investigated by Aberdeen City Council than any other local authority in Scotland between February 2012 and February 2013.
Justice Secretary Kenny MacAskill revealed that 317 cases were investigated by dog wardens, compared with 207 in the same period the previous year.
An out-of-control dog is said to be one whose behaviour causes alarm or apprehensiveness.
Councils launched a total of 2,080 investigations in 2012-13 – up from 1,114 year before.
North-east Conservative MSP Nanette Milne claimed the figures highlighted the “pressing need” for action to address the control and breeding of dogs, especially in council estates.
“The fact these investigations have increased shows you just how concerned the public is about this serious issue. However, it is worrying that some councils appear to be treating this as a priority while others are paying hardly any attention to the matter.”
The Scottish Government has launched a consultation on the possible introduction of compulsory microchipping for dogs and other measures to encourage responsible ownership.
In Aberdeen, four dog-control notices were issued to owners in each of the last two years. The notices compel owners to take action such as muzzling their dog in a public place, keeping it on a lead and completing a training course.
An Aberdeen City Council spokesman said: “These figures show we treat complaints of this nature very seriously and that the vast majority of investigations are resolved without the need for enforcement.”
A Police Scotland spokeswoman said it received only 12 criminal complaints relating to dangerous dogs in Aberdeen in 2012-13, which generally related to attacks. All complaints were investigated and reported to the procurator fiscal if warranted.
A government spokes-woman said a summit was being held shortly to “bring together local authorities so best practice can be shared between the best and the worst”.