Strong oil prices have boosted the hotel industry in Aberdeen, according to a business survey.

The north-east city had the highest figures for both room occupancy and revenue of any place in the UK outside of London, the survey by business advisers PKF found.

Year-on-year revenue, known as "rooms yield", rose by 14.3% in February while occupancy rates increased by 3.5%.

Inverness also recorded strong figures, with occupancy rising by 11.6% and revenue up 5.3%.

Those numbers compared to a drop of 2.1% in occupancy and 3.6% in revenue in Glasgow, which was the worst-performing of Scotland's cities.

Meanwhile, Edinburgh hotels saw occupancy rise, by 1.9%, but revenue falling slightly by 0.1%.

Overall, the monthly survey found that occupancy in Scotland fell by 2.4% during February compared with an increase of 1.1% in the UK regions.

Although room yield fell by 2.2% in Scotland during February, the overall figure of 41.43% was higher than any part of the UK.

Alastair Rae, of PKF, warned that a fall in oil prices could have a knock-on effect on the region's hospitality industry.

He said: "Whilst these figures continue to be very good news for Aberdeen and Inverness the concern is the sustainability of an economy which is quite so dependent upon the oil price.

"This is of particular concern for those wishing to invest in the sector.

"The hotel sector in Aberdeen has performed exceptionally well over the last year or so but there are signs that the oil price is weakening somewhat.

"Indeed forward projections show a decline in the price of oil as confidence weakens in China's economic performance and continuing uncertainty remains over the debt burdens of the EU.

"However, that is putting a bit of a dampener on what remain very good figures, not just in a Scottish context but for the UK as a whole.

"Glasgow hotels continue to benefit from the conference market and, whilst this month's numbers are down, this could be due to a quieter conference period rather than any major issues.

"Edinburgh is also down, although this is unlikely to be serious given its continued success as a major tourist destination.

"However, the sector in Scotland as a whole has considerably higher revenues so, while any drop in monthly figures is a concern, there is perhaps less to be worried about other than the challenge of controlling costs.

"If the trend continues in this way for several more months then there may be more to worry about but at the moment this is the quiet time of the year and the early Easter may kick-start the sector."