A barrier is any obstacle that prevents fish from moving either upstream or downstream and includes dams, weirs, floodgates, roads, bridges, causeways and culverts. These structures can form a barrier ...

Dredging is the name given to digging out material to deepen waterways, create harbours, channels, locks, docks and berths, desilt lakes and keep river entrances and approaches to boat ramps clear. Th ...

The Fisheries Scientific Committee has determined that hook and line fishing in critical habitat areas is a Key Threatening Process and could have an adverse affect in areas important for the survival ...

Many marine species have been introduced into NSW waters from interstate or overseas. Plants, animals and seaweeds, have become established in NSW and are now regarded as pests. The invasive marine al ...

Marine debris, often called litter, has become a problem along shorelines, coastal waters, estuaries, and oceans throughout the world. It is defined as any man-made, solid material that enters our wat ...

Oil and Gas exploration involves the testing and extracting of oil and gas from the earths crust. In the marine environment it often involves seismic testing, drilling and constructing large floating ...

The practice of commercial and non-commercial fishing which depletes a fishery by catching so many adult fish that not enough remain to breed and replenish the population. Overfishing exceeds the carr ...

Rubbish in the marine environment has many names including marine debris and litter. Rubbish in the marine environment includes any man-made material that enters our waterways and flows out to sea. Th ...

Shark nets or beach meshing, was first introduced at Sydney beaches in 1937. It currently occurs at 49 beaches from Newcastle to Wollongong. The nets used are 150m long, 6m high and have are position ...