Observations on the predation behaviour of the otter Lutra lutra in NE Spain

• Autorzy: Ruiz-Olmo J.
• Języki publikacji: EN

Abstrakty

EN

Adult and sub-adult otters Lutra lutra (Linnaeus, 1758) caught and consumed 3.36 prey (fish) per hour (n = 32 captures). This represents 273.8 g of wet mass/h of activity outside the rest sites (10.5-13.1% of the day) and it is enough to get their daily needs. Otters ate the prey without hiding on average (n = 93) 0.46 m from the bank (up to 3.9 m) and 0.25 m above water level (up to 2.05 m). Prey weighing less than 150-200 g were consumed entirely; for this reason prey remains are very rare (except large trout, American crayfish and gravide cyprinid females). Unpleasant tasting or toxic parts and sharp or wide parts of the bones, scales, teeth, claws, heads or leggs in large prey were not eaten.

Słowa kluczowe

EN

behaviour; predation; Iberian Peninsula; otter; Spain; Lutra lutra

• Wydawca: -
• Czasopismo: Acta Theriologica
• Rocznik: 1995
• Tom: 40
• Numer: 2
• Opis fizyczny: p.175-180,fig.

Twórcy

autor

Ruiz-Olmo J.

• Direccio General del Medi Natural, Gran Via de les Corts Catalanes, 612, 08007-Barcelona, Spain

Bibliografia

• Callejo A. 1988. Le choix des proies par la loutre (Lutra lutra) dans le nord-ouest de l'Espagne, en rapport avec les facteurs de l'environment. Mammalia 52: 11-20.
• Carss D. N., Kruuk H. and Conroy W. H. 1990. Predation on adult Atlantic salmon, Salmo salar L., by otters Lutra lutra (L.) within the River Dee system, Aberdeenshire, Scotland. Journal of Fish Biology 37: 935-944.
• Chanin P. 1985. The natural history of otters. Crrom Helm, London & Sidney: 1-179.
• Conroy J. W. H. and Jenkins D. 1986. Ecology of otters in northern Scotland. VI. Diving times and hunting succes of otters (Lutra lutra) at Dinnet Lochs, Aberdeenshire and in Yell Sound, Shetland. Journal of Zoology, London 209: 341-346.
• Duellman W. E. and Trueb L. 1986. Biology of amphibians. McGraw-Hill, New York.
• Erlinge S. 1967. Food habits of the fish-otter Lutra lutra L. in South Swedish habitats. Viltrevy 4: 371-443.
• Erlinge S. 1968. Food studies on captive otters (Lutra lutra L.). Oikos 19: 259-270.
• Fairley J. S. 1984. Otters feeding on breeding frogs. Irish Naturalists' Journal 21: 372.
• Hewson R. 1973. Food and feeding habits of otters (Lutra lutra) at Loch Park, north-east Scotland. Journal of Zoology, London 170: 159-162.
• Jenkins D. 1980. Ecology of otters in northern Scotland. I. Otter (Lutra lutra) breeding and dispersion in mid-Deeside. Aberdeenshire in 1974-79. Journal of Animal Ecology 49: 713-735.
• Jongh A. W. J. J., de 1988. The lack of toad remains in otter Lutra lutra spraints. Lutra 31: 79-81.
• Kruuk H., Carss D. N., Conroy J. W. H. and Durbin L. 1993. Otter (Lutra lutra L.) numbers and fish productivity in rivers in north-east Scotland. Symposia of the Zoological Society of London 65: 171-191.
• Kruuk H. and Hewson R. 1978. Spacing and foraging of otters (Lutra lutra) in a marine habitat. Journal of Zoology, London 185: 205-212.
• Kruuk H. and Moorhouse A. 1990. Seasonal and spatial differences in food selection by otters (Lutra lutra) in Shetland. Journal of Zoology, London 221: 621-637.
• Kruuk H., Wansink D. and Moorhouse A. 1990. Feeding patches and diving succes of otters, Lutra lutra, in Shetland. Oikos 57: 68-72.
• Lizana M. and Perez-Mellado V. 1990. Depredación por la nutria (Lutra lutra) del sapo de la sierra de Gredos (Bufo bufo gredosicola). Doňana, Acta Vertebrata 17: 109-112
• Mason C. F. and Macdonald S. M. 1986. Otters. Ecology and conservation. Cambridge University Press, Cambridge: 1-236.
• Ruiz-Olmo J. 1995. Estudio bionómico de la nutria (Lutra lutra L., 1758) en la peninsula Ibérica. Ph D thesis, University of Barcelona, 1-321.
• Ruiz-Olmo J. (in press). Visual census of otters: a new method. [In: Proceedings of VI International Otter College. Pietermaritzburg, South Africa, September 1993; C. Reuther, P. K. da Silva and C. Santipali, eds]. Habitat, Hankesbiittel, Germany.
• Ruiz-Olmo J. and Lopez-Martin J. M. 1993. Note on the diet of the genet (Genetta genetta) in Mediterraean riparian habitats of N.E. Spain. Mammalia 57: 607-610.
• Watson H. 1978. Coastal otters in Shetland. Chapman & Hall, London & New York: 1-000.
• Wayre P. 1979. The private life of the otter. Batsford, London: 1-112.