Abstract
Examined numbers of Falco peregrinus pairs, reproductive success, and eggshell thinning in New Jersey during 1979-88. Productivity of these falcons (mean 1.38 young fledged/pair) was comparable with that of stable populations, but productivity was lower for pairs near Delaware Bay and River (0.58 young/pair) compared to those in other regions of New Jersey (1.55 young/pair). Lower productivity and nest success of 4 pairs near Delaware Bay and River studied in both 1987 and 1988 were due to low hatching success and predation, probably by great horned owls Bubo virginianus. During 1985-88 eggshell thickness from New Jersey peregrines averaged 16.4% below pre-DDT levels and apparently has decreased steadily since 1979. This decrease in eggshell thickness statewide suggests that falcons continue to be exposed to environmental contaminants. -from Authors
Original language | English (US) |
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Pages (from-to) | 294-299 |
Number of pages | 6 |
Journal | Journal of Wildlife Management |
Volume | 55 |
Issue number | 2 |
DOIs | |
State | Published - 1991 |
ASJC Scopus subject areas
- Ecology, Evolution, Behavior and Systematics
- Ecology
- Nature and Landscape Conservation