Filters: Tags: predation (X)2,285 results (254ms)
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
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