Filters: Tags: predation (X)2,283 results (75ms)
Concern over the status of species associated with prairie dog colonies has increased with the recent proposed listing of black-tailed prairie dogs (Cynomys ludovicianus). We monitored burrowing owl (Athene cunicularia) populations and prairie dog densities in 17 black-tailed prairie dog colonies in the Nebraska panhandle between 1990 and 1996. All prairie dog colonies were controlled at least once during the study. We observed a 63% decline in nesting pairs of burrowing owls and significant declines in burrow densities. Results indicated a time lag in owl response to changes in active burrow densities. However, in the later years of the study when burrow densities were lowest, owl numbers were positively correlated...
Baltic Macoma: Abundance and distribution of an important winter food of diving ducks in Chesapeake Bay
The timing of dabbling duckling hatch, nest departure and depredation in Suisun Marsh, California from 2015-2017
These data include a row for each duck nest equipped with a small video camera. We present the location of the nest, the timing of the start of hatch, the timing of the end of hatch, and the timing of the departure of the hen and ducklings from the nest. Additionally, this table includes any predators that were observed at the nest depredating eggs prior to hatch and any predators that were observed at the nest between hatch and departure from the nest. These data support the following publication: "Sitting ducklings: Timing of hatch, nest departure, and predation risk for dabbling duck broods" by Sarah H. Peterson, Joshua T. Ackerman, Mark P. Herzog, C. Alex Hartman, Rebecca Croston, Cliff L. Feldheim, and Michael...
Abstract?Larval western toads (Bufo boreas) are known to exhibit antipredator behavior in response to both chemical alarm cues released from injured conspecifics and chemical cues of predatory invertebrates. In this study, we tested whether long-term exposure to predator and alarm cues resulted in an adaptive shift in life history characteristics of the toads. We raised groups of tadpoles in the presence of: (1) predatory backswimmers (Notonecta spp.) that were fed toad tadpoles, (2) nonpredatory water boatman (Corixidae), and (3) chemical alarm cues of injured conspecifics. Tadpoles raised in the presence of both chemical alarm cues and cues of predators fed tadpoles metamorphosed in significantly shorter time...
Mortality of eggs of Colorado potato beetle (Coleoptera: Chrysomelidae) from predation by Coleomegilla maculata (Coleoptera: Coccinellidae).
Fish predation on epiphytic microcrustacea in Tivoli South Bay, a Hudson River tidal freshwater wetland.
So-called cormorant "problem": A statement provided by the association of German bird protection observatories -- population size, distribution, feeding ecology and management measures.
Effect of young-of-the-year walleye (Percidae: Stizostedion vitreum) on plankton dynamics and water quality in ponds
Population dynamics of the Lake Michigan bloater (Coregonus hoyi): A matrix modeling analysis of exploitation potential
Population dynamics of the collared lemming and the tundra vole at Pearce Point, Northwest Territories, Canada
Size limitation on zebra mussels consumed by freshwater drum may preclude the effectiveness of drum as a biological controller