Study site. (a) Location map of India showing the state of Andhra Pradesh and the East-Godavari District (redrawn from NRSA ). The small black rectangle indicates the area in (b). (b) Satellite image of the Godavari Delta taken in March 1999. Adjacent to the study area, the white rectangle (ca. 320 km2) indicates the area used to extract demographic data (% fishermen) stored in the database of the South Indian Fertility Project (French Institute of Pondicherry, 2001). (c) Map of the study area investigated with the two zones and the 15 villages therein (numbered as in table 1).