Results from one of the most comprehensive scientific research programs ever undertaken in Cockburn Sound has shone a light on what makes the Sound tick and what will be needed to protect the things we value about it into the future.
The WAMSI Westport Marine Science Program brought together more than 150 scientists across 32 research projects, examining everything from seagrass and water quality to fish, crabs, snapper spawning, habitat restoration and the social value of Cockburn Sound.
There is plenty in the study that has significant interest and relevance to fishers.
Researchers recorded more than 582,000 individual fish and invertebrates and 251 fish species, highlighting the diversity that Cockburn Sound continues to support. The research also reinforced the Sound’s importance as a nursery for key recreational species including pink snapper and King George whiting.
Hatchery-reared snapper show up in the Sound
The snapper research is particularly interesting.
More than 750 snapper were genetically sampled, with the results showing a high level of connectivity between snapper in Cockburn Sound and adjacent areas of the lower west coast. Researchers also assessed more than 600 juvenile snapper and were able to distinguish hatchery-reared fish, such as those released through Snapper Guardians, from wild juveniles.
Habitat was another major focus. While Cockburn Sound has lost much of its historic seagrass, the research found conditions across much of the Sound are promising for restoration. That’s important for recreational fishing because healthy habitats underpin productive fisheries.
Perhaps just as importantly, the research recognised recreational fishing itself as an important value of Cockburn Sound. Interviews with 342 recreational fishers highlighted the Sound’s accessibility, sheltered waters and fishing opportunities, while researchers estimated around 80,000 recreational fishing trips are made to the Sound each year.
Improved habitats for even better fishing
The research also found fishers placed a high priority on environmental improvements, particularly seagrass restoration, artificial reefs and fish stocking.
For Recfishwest, that’s important, said Recfishwest Operations Lead Matt Gillett.
“Healthy ecosystems and great fishing aren’t competing objectives,” said Matt. “Protecting and restoring the habitats that support fish populations is fundamental to maintaining the fishing experiences that generations of West Australians have enjoyed in Cockburn Sound.
“As major changes are considered for the Sound, this body of research provides an important new evidence base for future decisions. It also reinforces why fishing needs to remain firmly part of the conversation about Cockburn Sound’s future.”
Good management should protect what makes the Sound special, while ensuring West Australians can continue to sustainably enjoy it.
