Temporal and host-size related infection levels were monitored and discussed in relation to host movement within the estuary.
He concluded, therefore, that this age group of the fish population was restricted to the upper estuary during its first year of life.
The deep draught estuary was easy to defend since it had a narrow mouth surrounded by mountains.
Organic matter rich in phosphorus might also have been composted and imported from the swamp estuary or savanna zones.
This may work for the locals, but does not help people elsewhere there are all too many estuaries and bays around the world.
Rarely can an entire ecosystem, say a pond or estuary, reasonably be considered as a homogeneous environment.
This would suggest that it has been spreading upriver from a source near the estuary.
Juveniles live in shallow coastal waters and estuaries, which are also the summer feeding grounds for the adults.
