Report to SOTEAG (Shetland Oil Terminal Environmental Advisory Group) on numbers of Tysities ('Cepphus grylle') in the area of the Yell Sound Island, August 1981
Technical Report
·
OSTI ID:5464966
A survey was conducted in late August 1981 when most of the young birds had fledged and were identifiable on the water as juveniles. The total number of Tysties (Cepphus grylle) was very similar to the 1980 figure. The ratio of adults to juveniles was higher in 1981, but this figure was not thought very reliable. A number of Tysties were also recorded outside the area of the survey; it was not known whether these birds move into the area of the Yell Sound. The numbers of Tysties recorded remained well below the pre-1978 level, before the 'Esso Bernicia' oil spill.
- Research Organization:
- Technische Hogeschool Delft (Netherlands). Dept. of Applied Physics
- OSTI ID:
- 5464966
- Report Number(s):
- PB-83-257923
- Country of Publication:
- United States
- Language:
- English
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