1 March 1977 To: From: ject: Le Chief, Enewetak Planning Group Medical Entomology Survey Officer Medical Entomological Surveillance of Enewetak Atoll HOR Ob7 GENERAL: By the direction of DASG a medical entomological survey was conducted on selected coral islets of the Enewetak Atoll to determine all real and potential entomological problems to be encountered during cleanup operations. Biologically and ecologically the islets are still evolving and represent a fragile and unstable biological commmity. The introduction of higher animal life forms has been artificial. This situation has allowed a number of species to inhabit the islets unchecked by natural predation. . A variety of factors have successfully limited the t!-c establishment of various pests. d. 1) Limited accessability of the islets. 2) High winds. 3) Limited land area, breeding sites, appropriate food sources and harborage. These factors have, for the most part, restricted the establishment of medically important arthropoda on the islets. METHODOLOGY: a. A total of 12 islets were selected for surveillance. Selection was based on the following criteria: 1) Size. 2) + BEST AVAILABLE COPY Vegetation and structural harborage. 3) Operational aspects related to cleanup mission, 4) Information provided by Mid Pacific Marine Laboratory civilians and natives. (MPML) S) Information provided by engineers surveying various islets.