• Medientyp: E-Artikel
  • Titel: The Mobility of Breeding Pintails
  • Beteiligte: Derrickson, Scott R.
  • Erschienen: The American Ornithologists' Union, 1978
  • Erschienen in: The Auk
  • Sprache: Englisch
  • ISSN: 1938-4254; 0004-8038
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  • Beschreibung: <p>During 1971, 1972, and 1973 the mobility of breeding Pintails (Anas acuta) was studied in the pothole region of central North Dakota. A total of 5 unpaired males, 8 paired males, and 15 females were marked and followed for periods long enough to enable home range estimation. The mean home range sizes for unpaired males, paired males, and paired females were 579 ha, 896 ha, and 480 ha, respectively. Males were generally more mobile than females at all stages of the reproductive cycle. Mobility was found to vary with reproductive chronology, usually decreasing from the prenesting to the nesting period. Seven pair ranges that included both the prenesting and nesting period averaged 509 ha, while four pair ranges that included only the nesting period averaged 167 ha. Female mobility was found to be greatest during the period preceding laying, and home range estimates for the prenesting period were significantly larger than home ranges calculated for the laying period. Females that renested were found to have reduced mobility throughout the renest interval. Home range estimates for breeding Pintails are generally larger than those previously recorded for other Anas species. Interspecific variation in breeding home range size is apparent, and reflects differences in social behavior and feeding ecology.</p>
  • Zugangsstatus: Freier Zugang