Nonrepresentative sampling during waterfowl banding: emphasis on body condition

K. W. Dufour, C. D. Ankney, P. J. Weatherhead

Research output: Contribution to journalArticle

Abstract

The authors trapped mallards Anas platyrhynchos on the E shore of Lake St Clair, Ontario, during August and September of 1989 and 1990 to investigate the potential for nonrepresentative sampling in typical autumn (pre-hunting season) duck-banding operations. The local population was spatially segregated with respect to sex, age, molt chronology, and body condtion, indicating a potential danger when the spatial distribution of the banding effort is limited. Sex composition of trapped samples varied according to size of the daily catch; smaller catches contained proportionally more females, but size of the catch had no apparent influence on age ratios. Analyses conducted separately by sex and age provided little evidence for a relationship between size of the catch and condition of captured individuals. Results are generally inconsistent with the hypothesis that food-stressed individuals are among the first to respond to baited areas and enter traps. Thus, condition-related trap selectivity is unlikely to vary with size of the trapped sample. -from Authors

Original languageEnglish (US)
Pages (from-to)741-751
Number of pages11
JournalJournal of Wildlife Management
Volume57
Issue number4
DOIs
StatePublished - Jan 1 1993
Externally publishedYes

ASJC Scopus subject areas

  • Ecology, Evolution, Behavior and Systematics
  • Ecology
  • Nature and Landscape Conservation

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