Effects of DDT treatments applied for tsetse fly control on the African goshawk in north-west Zimbabwe

摘要: Summary Levels of σDDT and DDE in African goshawk eggs were correlated with number past spray treatments the nest site. content was inversely related to eggshell thickness. Mean levels four out six clutches from sprayed areas exceeded 130 ppm dry weight, highest critical level associated population decline other raptor species. Cracked eggshells found at two sites. The small occupied sites higher rate site desertion area, compared unsprayed suggest tsetse spraying operations caused a decline. Resume Le taux de et dans les oeufs l'Autour africain ete mis en relation avec le nombre traitements par aspersion qui avaient eu lieu l'endroit nidification. Le contenu etait inversement liea l'epaisseur la coquille. moyen quatre des nichees provenant zones aspergees depassait du poids sec, ce est niveau plus eleve considere comme critique pour declin chez autres especes rapaces. On trouve coquilles cassees deux endroits asperges. Le petit nidification occupes asperges, comparees se passe regions non aspergees, suggerent que d'aspersion contre tsetses cause un population.