Indicators in this Marine Report Home Feedback Search Back to section Trends in recreational skiboats Mean monthly shore angling effort Invertebrate licences Effluent discharge locations Pipeline effluent There are 3 000 spearfishers in the DMA There are 125 sandprawns/m2 on some harbour sandbanks There is an average of 7 crayfish/100m2 of reef There is 40% mussel cover in the intertidal rocky shore areas Heavy metal concentrations at the Southern Outfall Long terms trends in surf zone water quality Change in catch composition Skiboat catch composition Shore angler catch composition Trend in Catch Per Unit Effort Recreational invertebrate harvest Maintained by Metropolitan Durban Page editor: Webmaster. Last update: 16/02/99.