Document 2qBrb0QRn3z9p8wQXoJL77ODp

MILWAUKEE SENTINEL MILWAUKEE, WISC. 0. 169.011. MAY 13 1969 V. \ Some Bird Species Called DDT Victims ^ By QUINCY DADISMAN drocarboa compounds widely ,: Sentinel Staff Writer used In Industry. FC8*s showv Madison, Wl*. - A Cellfor* bp Id some test equipment id a *: nit blochemiftt textlfiod Mon* way that makes separation ofv dey thal hi* studies have eon.; .DDT In analysts much more vinced him that DOT and net1 difficult another commonly found eon. taminant Is tho causa of thin Only Few round eggshells which ho believes . Rlsebrough said that while' will wipe out certain predatory PcB's an found In large bird species. _. umounts In many marine birds,. he had found only a few In*. Robert Rlsebrouch. Berko* which there were more PCB*e.. lay, Calif., was called as an ad* man DOT or tt matabolltlss. verse witness by attorney (forms into which it changes In* defending t h e.nfifticidft at a passing through living tissue). natural resource department hearing on a petition calling He said that tests with eggs, for banning DDT In .Wisconsin. containing up to one part per million (p.p.m.) of PCB's end', Testified Earlier Rlscbrough had testified In up to six p.p.m. of DDT In ell. December for tho petitioners forms showod mathematically, -- Citizens* Natural Resource by correlation with eggshell association and thl Wisconsin thickness that D D E and not chapter of the laaak Walton PCB's, were to blame. The'' league -- about DDE, e form teats were made mathematical. Into which DDT changes In liv ly, he said, with a statistical ing bodies and hia conviction accuracy of 99.9%. * that DDE causes a metabolic Ha said that damage to disturbance In birds which eggshetla from DDT can ^a r leads to thin eggshblis. . I traced not only to the DDE In; ' The thin shell cracks' easily, ; the bird's body fat, but also to , causing the death of the era' the amount present in .the food bryo inside the egg.; . . Keats. , .1 RUabrough wfi called by MDDT may be comparatively )Vlllard S. Stafford, Madison Inaotive In the body fat." ha attorney who it conducting the concluded, explaining that per* defense of DDT for the Nation* egrlne falcons from Arctic al Agricultural Chemicals aaso* areas stem to bs sustaining elation. ; . ' their numbers better then Stafford questioned Rise* tltoas from more temperate ell* brough about work he has mates because the food they done with polychlorinated bl* eat w h 11 a rearing t second.( phenyls (PCB), a g6iip of hy- clutch of eggs Is "d*amH f . . ' M A ' * ' HONS 029716