Detection of otter (Lutra lutra L.) signs in a survey of Central and Eastern Poland: methodological implications

• Autorzy: Romanowski J.
• Języki publikacji: EN

Abstrakty

EN

Searching for spraints (excre ments) and tracks is widely used for monitoring of European populations of otters Lutra lutra. Data collected in Central and Eastern Poland were analysed in order to evaluate the environmental factors affecting the detection of otter signs during field surveys. At each out of 1111 sites studied from 1996–1998 numbers of otter spraints and tracks as well as distance searched to detect first sign were noted. At each site several environmental variables were recorded to identify factors that may have affected the survey results. The variation in numbers of spraints and tracks found at each positive site was not related to the habitat quality and any other habitat features (including tree and shrub cover, presence of potential shelters) analysed, except the number of tracks was positively related to bridge potential. The distance searched was the most variable indicator of otter occurrence. It increased with the width of river and at sites with few potential sprainting sites, with bridges of poor potential or with no bridges at all, and where many signs of human and domesticated animals activity were noted. The results indicate that detection of otter signs is partially affected by specific elements unrelated to habitat potential and therefore numbers of spraints should not be used as an indicator of otter habitat preference. At a regional scale variation in number of spraints and tracks, as well as distance searched was related to otter occupancy expressed in the form of percentage of positive sites at three study areas. This study shows that measuring the distance searched provides additional indication of otter status at a regional scale and could be used to identify specific habitats where detection of otter signs during surveys is difficult.

Słowa kluczowe

EN

spraint survey; monitoring; scent marking; survey techniques

PL

wydra europejska; monitorowanie; znaczenie terenu; techniki pomiarowe

• Wydawca: Museum and Institute of Zoology, Polish Academy of Sciences
• Czasopismo: Polish Journal of Ecology
• Rocznik: 2013
• Tom: Vol. 61, nr 3
• Strony: 597--604
• Opis fizyczny: Bibliogr. 39 poz., il.

Twórcy

autor

Romanowski J.

• Centre for Ecological Research, Polish Academy of Sciences, Konopnickiej 1, Dziekanów Leśny, 05-092 Łomianki, Poland

Bibliografia

• 1. Balestrieri A., Remonti L., Prigioni C. 2011 - Delectability of the Eurasian otter by standard surveys: an approach using marking intensity to estimate false negative rates - Naturwissenschaften, 98: 23-31.
• 2. Baranauskas K., Mickevicius E. 1995 - Some factors influencing the habitat use by otter (Lutra lutra) in Vilnius region - Ekologija (Vilnius), 2: 49-53.
• 3. Barrientos R. 2006 - Year-round defecation pattern in wild genets (Genetta genetta L.) in a mountain forest (Toledo, Central Spain) - Pol. J. Ecol. 54: 325-328.
• 4. Brzeziński M., Romanowski J. 2006 - Experiments on sprainting activity of otters (Lutra lutra) in the Bieszczady Mountains, southeastern Poland - Mammalia, 55: 58-63
• 5. Brzeziński M., Romanowski J., Cygan J.P., Pabin B. 1996 - Otter Lutra lutra distribution in Poland - Acta Theriol. 41: 113-126.
• 6. Chanin P. 2003 - Monitoring the Otter Lutra lutra - Conserving Natura 2000 Rivers Monitoring Series No. 10, English Nature, Peterborough.
• 7. Crawford A., Jones A., McNulty J. 1979 - Otter survey of Wales 1977-78. Society for the Promotion of Nature Conservation - Nature Conservation Council, London.
• 8. Erlinge S. 1967 - Home range of the otter Lutra lutra L. in southern Sweden - Oikos, 18: 186-209.
• 9. Erlinge S. 1968- Territoriality of the otter Lutra lutra - Oikos, 19:81-98.
• 10. Fretwe 11 J. 1972 - Populations in a seasonal environment - Princetown University Press, Princetown.
• 11. Gese E.M. 2001 - Monitoring of terrestrial carnivore populations - (In Carnivore conservation. Eds: J.L. Gittleman, S.M. Funk, D.W. Macdonald, R.K. Wayne) - Cambridge University Press, Ithaca, New York pp. 372-396.
• 12. Green J., Green R. 1980 - Otter survey of Scotland 1977-79 - Vincent Wildlife Trust, London.
• 13. Green R., Green J. 1997 - Otter survey of Scotland 1991-94 - Vincent Wildlife Trust, London.
• 14. Hájková P., Zemanová B., Roche K., Hájek B. 2008 - An evaluation of field and non-invasive genetic methods for estimating Eurasian otter population size - Conserv. Genet. 10: 1667-1681.
• 15. Jahrl J. 1996 - Der Europäische Fischotter (Lutra lutra Linne, 1758) an der Naarn im Bundesland Oberöstereich: eine Erhebung mittels indirekter Nachweise mit einer Diskussion der Untersuchungsmethode und des Markierungsverlhaltens - M. Sc. Thesis, University of Salzburg, 69 p.
• 16. Jefferies DJ. 1986 - The value of otter Lutra lutra surveying using spraints: an analysis of its successes and problems in Britain - J. Otter Trust, 1: 25-32.
• 17. Kruuk H. 1992 - Scent marking by otters (Lutra lutra): signalling the use of resources - Behavioral Ecology, 3: 133-140.
• 18. Kruuk H., Carss D.N., Conroy J.V.H., Durbin L. 1993 - Otter (Lutra lutra L) numbers and fish productivity in rivers in northeast Scotland - Symposia of Zool. Soc. London 65: 171-191.
• 19. Kruuk H., Conroy J.V.H. 1987 - Surveing otter Lutra lutra populations: a discussion of problems with spraints - Biol. Conserv. 41: 179-183.
• 20. Kruuk H., Conroy J.V.H., Glimmerveen U., Ouwerkerk E.J. 1986 - The use of spraints to survey populations of otters Lutra lutra - Biol. Conserv. 35: 187-194.
• 21. Lenton E. J., Chanin P.R.F., Jefferies DJ. 1980 - Otter survey of England 1977-79 - Nature Conservancy Council, London.
• 22. Macdonald S.M., Mason C.F. 1983 - Some factors influencing distribution of otters (Lutra lutra) - Mammal Rev. 13: 1-10.
• 23. Macdonald S.M., Mason C.F. 1987 - Seasonal marking in an otter population - Acta Theriol. 32: 449-462.
• 24. Macdonald S.M., Mason C.F. 1988 - Observations on an otter population in decline - Acta Theriol. 33: 415-434.
• 25. Mason C.F., Macdonald S.M. 1987 - The use of spraints for surveying the otter Lutra lutra populations: an evaluation - Biol. Conserv. 41: 167-177.
• 26. Mason C.F., Macdonald S.M. 2004 - Growth in Otter (Lutra lutra) populations in the UK as shown in long-term monitoring - Ambio, 33: 148-152.
• 27. Melero Y., Palazón S., Gosàlbez J., Martelo J., Bonesi L. 2013 - Is the standard Eurasian otter Lutra lutra survey strategy suitable for surveying the American mink Neovison vison? - Acta Theriol. 58: 169-177.
• 28. Prigioni C., Balestrieri A., Remonti L. 2007 - Decline and recovery in otter Lutra lutra populations in Italy - Mammal Rev. 37: 71-79.
• 29. Prigioni C., Fumagalli R., Schirru L., Carugati C. 1995 - Sprainting activity of captive otters: its relationship with breeding cycle and number of animals - Hystrix (n.s.), 7:297-301.
• 30. Reuther C., Dolch D., Green R., Jahrl J., Jefferies D.J., Krekemeyer A., Kucerova M., Madsen A.B., Romanowski J., Roche K., Ruiz-Olmo J., Teubner J., Trindade A. 2000 - Surveying and monitoring distribution and population trends of the Eurasian Otter (Lutra lutra). Guidelines and evaluation of the standard method for surveys as recommended by the European section of the IUCN/SSC Otter Specialist Group - Habitat, Hankensbuttel, 12: 1-152.
• 31. Romanowski J. 2000 - Habitat selection of otters during recolonisation - PhD thesis, Institute of Ecology PAN: 1-70 (in Polish).
• 32. Romanowski J. 2006 - Monitoring of the Otter recolonisation of Poland - Hystrix It. J. Mamm. (n.s.) 17: 37-46
• 33. Romanowski J. 2007 - Vistula river as the ecological corridor for mammals - Pol. J. Ecol. 55: 805-819.
• 34. Romanowski J., Brzeziński M. 1997 - How standard is the standard technique of the otter survey? - IUCN Otter Spec. Group Bull. 14: 57-61.
• 35. Romanowski J., Brzeziński M., Cygan J.P. 1996 - Notes on the technique of the otter field survey - Acta Theriol. 41: 199-204.
• 36. Romanowski J., Brzeziński M., Żmihorski M. 2012 - Habitat correlates of the Eurasian otter (Lutra lutra) recolonizing Central Poland - Acta Theriol. 58: 149-155.
• 37. Rostain R.R., Ben-David M., Groves P., Randall J.A. 2004 - Why do river otters scent-mark? An experimental test of several hypotheses - Animal Behaviour, 68: 703-711.
• 38. SidorovichV.E. 1991 - Structure, reproductive status and dynamics of the otter population in Byelorussia - Acta Theriol. 36: 153-161.
• 39. Strachan R., Jefferies DJ. 1996 - Ottersurvey of England 1991-1994. A report on the decline and recovery of the otter in England and on its distribution, status and conservation in 1991-1994 - The Vincent Wildlife Trust, London.