• A simple method for monitoring the spawning activity of fish in net enclosures 

      May, Robert C.; Akiyama, G. S.; Santerre, M. T. (Aquaculture Department, Southeast Asian Fisheries Development Center, 1976)
      A simple method is described for monitoring the spawning activity of fish held in suspended net enclosures. The method, which involves an airlift pump, has been used successfully with the threadfin, Polydactylus sexfilis, ...