Notes on the technique of the otter field survey

• Autorzy: Romanowski J. , Brzezinski M. , Cygan J.P.
• Języki publikacji: EN

Abstrakty

EN

Data (2083 sites visited) collected during the otter Lutra Intra (Linnaeus, 1758) survey of Poland in 1991-1994 were used to evaluate some of the factors affecting the efficiency of the technique. The success in detecting otter signs was found to be significantly affected by the presence of "spraintable" bridges and other potential sprainting sites on the banks. Decreased efficiency of the technique was noted in specific habitats, eg large rivers, canals surrounded by open fields or meadows, and any aquatic habitats with few potential sprainting sites on the banks. It is suggested that modifications: spot checks at additional bridges and extended searches of river banks, could be used to improve the reliability of the survey in areas with low numbers of otter signs.

Słowa kluczowe

EN

canal; specific habitat; meadow; field survey; river; negative site; positive site; otter; Lutra lutra

• Wydawca: -
• Czasopismo: Acta Theriologica
• Rocznik: 1996
• Tom: 41
• Numer: 2
• Opis fizyczny: p.199-204,fig.

Twórcy

autor

Romanowski J.

• Polish Academy of Sciences, 05-092 Lomianki, Poland

autor

Brzezinski M.

autor

Cygan J.P.

Bibliografia

• Baranauskas K. and Mickevicius E. 1995. The new data on the otters in Lithuania. Lutreola 5: 11-14.
• Brzeziński M. 1991. Distribution of the river otter Lutra lutra L. in the Bieszczady Mountains. Przegląd zoologiczny 35: 397-406. [In Polish with English summary]
• Brzeziński M., Romanowski J., Cygan J. P. and Pabin B. 1996. Otter Lutra lutra distribution in Poland. Acta Theriologica 41: 112-126.
• Crawford A., Jones A. and McNulty J. 1979. Otter survey of Wales 1977-78. Society for the Promotion of Nature Conservation / Nature Conservation Council, London: 1-70.
• Green J. and Green R. 1980. Otter survey of Scotland 1977-79. Wincent Wildlife Trust, London: 1-46.
• Jefferies D. J. 1986. The value of otter Lutra lutra surveying using spraints: an analysis of its successes and problems in Britain. Journal of Otter Trust 1: 25-32.
• Jenkins D. and Burrows G. O. 1980. Ecology of otters in northern Scotland. III. The use of feaces as indicators of otter (Lutra lutra) density and distribution. Journal of Animal Ecology 49: 755-774.
• Kruuk H., Carss D. N., Conroy J. V. H. and Durbin L. 1993. Otter (Lutra lutra L.) numbers and fish productivity in rivers in north-east Scotland. Symposia of zoological Society of London 65: 171-191.
• Kruuk H. and Conroy J. V. H. 1987. Surveing otter Lutra lutra populations: a discussion of problems with spraints. Biological Conservation 41: 179-183.
• Kruuk H., Conroy J. V. H., Glimmerveen U. and Ouwerkerk E. J. 1986. The use of spraints to survey populations of otters Lutra lutra. Biological Conservation 35: 187-194.
• Lenton E. J., Chanin P. R. F. and Jefferies D. J. 1980. Otter survey of England 1977-79. Nature Conservancy Council, London: 1-75.
• Macdonald S. M. 1983. The status of the otter in the British Isles. Mammal Review 13: 11-23.
• Macdonald S. M. 1990. Surveys. [In: Otters; an action plan for their conservation. P. Foster-Turley, S. Macdonald and C. Mason, eds], IUCN Species Survival Commision, Gland: 8-10.
• Macdonald S. M. and Mason C. F. 1983. Some factors influencing distribution of otters (Lutra lutra). Mammal Review 13: 1-10.
• Macdonald S. M. and Mason C. F. 1987. Seasonal marking in an otter population. Acta Theriologica 32: 449-462.
• Macdonald S. M. and Mason C. F. 1988. Observations on an otter population in decline. Acta Theriologica 33: 415-434.
• Macdonald S. M. and Mason C. F. 1994. Status and conservation needs of the otter (Lutra lutra) in the western Palaearctic. Nature and Environment 67: 1-54
• Madsen A. B. and Nielsen C. E. 1986. The occurrence of Otter (Lutra lutra L.) in Denmark 1984-86. Flora og Fauna 92: 60-62. [In Danish with English summary]
• Mason C. F. and Macdonald S. M. 1986. Otters: ecology and conservation. Cambridge University Press, Cambridge: 1-236.
• Mason C. F. and Macdonald S. M. 1987. The use of spraints for surveying the otter Lutra lutra populations: an evaluation. Biological Conservation 41: 167-177.
• Sidorovich V. E. 1991. Structure, reproductive status and dynamics of the otter population in Byelorussia. Acta Theriologica 36: 153-161.