The use of a new notation together with the territory mapping method is proposed for imprecisely located singing males, owing to which a position of a bird can be noted more precisely in field surveys
Department of Vertebrate Zoology, Faculty of Biology and Environmental Protection, Nicolaus Copernicus University, Lwowska 1, 87–100 Toruń, Poland
Bibliografia
Best L. B., 1975, Interpretational errors in the “mapping method” as a census technique, Auk 92: 452-460.[http://dx.doi.org/10.2307/4084601]
Bibby C. J., Burgess N. D., Hill D. A. & Mustoe S. H., 2000, Bird Census Techniques, 2nd ed., Academic Press, London.
Enemar A., 1959, On the Determination of the Size and Composition of a Passerine Bird Population during the Breeding Season, Vår Fågelvärld, Supplement 2: 1-114.
Enemar A., Sjöstrand B. & Svensson S., 1978, The effect of observer variability on bird census results obtained by a territory mapping technique, Ornis Scandinavica 9: 31-39.[http://dx.doi.org/10.2307/3676136]
Morozow N. S., 1994, Inter-analyst variation in the combined version of the mapping method: the role of experience, Acta Ornithologica 20: 89-99.
Paul J. T. & Roth R. R., 1983, Accuracy of a version of the spot-mapping census method, Journal of Field Ornithology 54: 42-49.
Tomiałojć L., 1980, The combined version of mapping method, [in:] H. Oelke (ed.), Bird census work and nature conservation, Dachverband Deutscher Avifaunisten, Göttingen: 92-106.
Verner J. & Milne K. A., 1990, Analyst and observer variability in density estimates from spot mapping, Condor 92: 313-325.[http://dx.doi.org/10.2307/1368229]