'The mangrove crab, Scylla serrata, in the Era River and the Purari delta and its fishery.'
'The inshore prawn resource and its relation to the Purari delta region.'
'The hydrology and limnology of the lower Sepik River roundwater and floodplain.'
'The fishes.'
'The fisheries of Papua New Guinea: promises and problems.'
'The fisheries and fish fauna of the Sepik River system: recommendations for species introduction.'
'The establishment of exotic freshwater aquarium fish in Papua New Guinea.'
'The effects of industrial development on mangrove forests in the Gulf Province of Papua New Guinea.'
'The ecology of juvenile penaeid prawns, mangrove crabs (Scylla serrata) and the giant freshwater prawn (Macrobrachium rosenbergii) in the Purari Delta.'
