Sparrow hawk

In predicting the effects of a pollutant on population growth rate, the effects of the chemical on the values of t, I, and n are of central interest. Chemical residue data and biomarker assays that provide measures of toxic effects are relevant here because they can, in concept, be used to relate the effects of a chemical upon the individual organism to a population parameter such as survivorship or fecundity (Figures 4.5 and 4.6). Examples of this are discussed in the second part of the text, including the reduction of survivorship of sparrow hawks caused by dieldrin (Chapter 5), the... 

Later evidence suggested that merlins (Falco columbarius) also declined in parts of Britain during the late 1950s or early 1960s as the result of exposure to cyclodienes (Newton, Meek, and Little 1978). The merlin, like the peregrine and sparrow hawk, is a bird-eating predator. 

Northern sparrow hawk, Accipiter nisus liver vs. eggs total PCBs Norway, 1965-83 dead on collection 1100 (<100-107,000) FW vs. 5900 (<100-39,000) FW 1... 

Newton, I., and Bogan, J. Organochlorine residues, eggshell thinning and hatching success in British sparrow-hawks. Nature 249, 582-583 (1974). 

Between 1963 and 1975, HEOD (dieldrin) accounted for 50% and 39% of all recorded sparrow hawk and kestrel deaths, respectively, in Britain (Newton et al., 1992). There was a recovery of the populations in between 1987 and 1990 after a marked reduction in aldrin dieldrin use (Newton... 

Organochlorine pesticides, PCBs and PCDDs/PCDFs caused the decline of several avian populations in the late 1960s, such as sparrow hawks and kestrels in Europe and North America (Newton, 1992). The effects of these compounds on birds were linked with direct mortality due to pollutants and reproductive performance, such as eggshell thinning and... 

DDT may have serious effects on reproduction in birds and other vertebrates. DDT s countdown started when Ratcliff (1967) at Monks Wood Experimental Station, Abbots Ripton, U.K., found that a decrease in eggshell weight in peregrine and sparrow hawk had been synchronous, rapid, and widespread from 1945. He wrote in his "Decrease in Eggshell Weight in Certain Birds of Prey" (Ratcliff, 1967) ... 

Mosquet sparrow-hawk, bocame mousquet Famfont a hawk, was a h av piece of ordnance. 

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