Details are given of experiments conducted at the Freshwater Aquaculture Centre at Munoz, Philippines, to investigate the effects of varying the rice planting pattern on fish yields in integrated rice field aquaculture systems.Regular planting and border planting patterns were compared and Tilapia zillii and Cyprinus carpio species were involved in the trials. Results indicated no differences in fish production using the 2 planting patterns, however it is suggested further experiments be carried out in order to investigate the many interactions which exist between fish and the rice field environment.