Assessment of the status of the great crested newt Triturus cristatus within the Scottish Natural Heritage East Highland Area, 2004
Eight ponds/pond clusters within the Scottish Natural Heritage East Highland Area were surveyed, to assess the suitability of surrounding habitats and give recommendations for management where this is thought to be required. All amphibians present were recorded.
1. Great crested newts T. cristatus were recorded at only one of the eight ponds/pond clusters surveyed,
2. The total population of great crested newt T. cristatus in the ponds surveyed was estimated at between 3 and 10 adults, based on standard multipliers for night torch surveying.
Two of the ponds had previously been surveyed during the 2002 survey carried out by HEL, but no great crested newts were recorded at either pond during either survey.
This work contributes towards the actions of UK Biodiversity Action Plan for great crested newt T. cristatus. It will help future monitoring and management of the sites, thus ensuring the long-term viability of the East Highland populations.
Survey methodology was based on the recommendations of Griffiths et al. (1996). The following provides a summary of the methods:
1 Day visit: collection of environmental/habitat data
For all sites, an adapted BRC/JNCC amphibian national recording scheme record card was completed. A sketch map of the aquatic habitats and surrounding terrestrial habitat was also completed, including the name and location of the site, boundaries, scale, direction of north, important surrounding features (aquatic and terrestrial), position and direction from which any photograph(s) taken.
To enable comparison with Griffiths et al. (1996), the following environmental information was also collected on a standardised recording form:
Water temperature 2 cm below the surface,
Length and width of each pond;
% of open water;
% of submerged vegetation across pond;
% of emergent vegetation across pond;
Turbidity (scale: clear/slightly murky/very murky).
At least one photograph was taken of each water-body.
2 Egg search
A search of surface and submerged vegetation around the edge of each water-bodies was undertaken to confirm the presence/absence of great crested newt T. cristatus eggs. Surveyors searched vegetation for the presence of eggs, with the characteristic way in which the leaves are wrapped around the egg being looked for.
3 Torch survey
Each pond was revisited on two occasions and torchlight night counts conducted. These were conducted between 30-90 minutes after dusk, and 60 minutes before dawn, and entailed a count of all amphibians of the accessible shoreline of each water-body. Each water-body was worked progressively around whilst scanning with the light beam of the Clulite rechargeable, 6 volt, 10 amp, 500, 000 candle power (Model GL6) torch.
All counts were undertaken in favourable weather conditions, i.e. mild, dry, calm nights.
Inger, S.D., Osborne, R.L., Black, D.J. & Bates, M.A. (2004) Assessment of the status of the great crested newt Triturus cristatus within the SNH East Highland Area. Heritage Environmental Ltd., Auchterarder, for Scottish Natural Heritage, Dingwall.
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