Dolphins, shellfish and future fish management plans

Marine scientists have included more focused management strategies and further interventions to ensure the future of marine ecosystems and major fish species, as well as “nearly threatened” dolphins around South Australia’s coastline. We are looking to secure shellfish.

Due to continued pressure from human activity and climate change, three new research articles led by experts at Flinders University take into account the increased pressure on marine ecosystems, with more research and regular surveillance It warns of need.

Dr. Mike Bosley, a major South Australian whale and dolphin conservation scientist, and his team have been tracking the local Indo-Pacific Bottlenorth Dolphin (Tursiops Aduncus) in the Adelaide Dolphin Reserve for 34 years .

Despite living in this highly urbanized estuary, these dolphins are published in Ecology and Evolution, “Long-term demographic trends of threatened coastal dolphins living in urban estuary.” It shows remarkable resilience, according to researchers at Flinders University, titled.

Dr. Bossley’s Flinders University Cetacean Ecology, Behavior and Evolution Lab (CEBEL) study of long-term data highlighted a troubling population decline between 2012 and 2020.

Fortunately, recent dolphin sightings have been stable in 2021-24, according to Dr. Bosley’s observations.

“Despite numerous environmental and human-caused obstacles, Adelaide’s dolphin reserves are shallow protected areas, and dolphins may continue to use this area for its benefits.” Candidates for Flinders College of Science Engineering person.

“It is important to focus conservation strategies on improving the ecosystem of the Adelaide Dolphin Reserve and promoting connectivity to surrounding waters to ensure the future of these dolphins.”

The Adelaide Dolphin Reserve is located in Port Adelaide and was founded in 2005 with the intention of protecting dolphins.

Additionally, a second Flinders University study published in Marine and Coastal Management examines the historical exploitation of South Australian shellfish coral reefs and restores native marine species for local ecosystem health. We are calling for urgent intervention to

“As well as human and environmental stresses and harvesting overfishing and dr-retirement, we have significantly reduced multiple local shellfish reefs. Candidate Brad Martin.

“Based on historical records, we document 140 potential shellfish reef sites, and by the 1940s, more than 43 million statewide between 1849 and 1915 before functional extinction by the 1940s. It is estimated that flat oysters were commercially harvested.

“The decline of shellfish reefs was also influenced by environmental factors such as drought and salinity issues, disease, heavy predation by marine species, and sediment deposition from storms.”

Researchers say that colonization should be reflected in future conservation and restoration efforts, so the end of these coastal features will result in the end of these important native shellfish species in policy setting and coastal management strategies. They say it should be included.

In the third article published in Environmental DNA, scientists from Flinders University and the South Australian Environment Agency collaborated with Parks Australia to study the marine ecosystem fish community, including the great Australian remote locations. We evaluated the best methods for detection. byte.

Environmental DNA (EDNA) and bait-equipped remote underwater video systems (BRUVs) were evaluated and compared on the offshore captains and islands of the Nuyts Archipelago Marine Park and Commonwealth South West Marine Park Network in SA.

“Fish communities are important indicators of ecosystem health, and comprehensive surveillance strategies are essential for effective management of marine fish.”

This study found that the two survey methods were effective and complementary in the detection of different fish species.

“By combining both methods, we get a richer picture of the fish community,” says first author Ewan Burns. “Edna was excellent at detecting large peragic species such as the white shark (Carcharodon Carcharias) and Southern Bluefin Tuna (Thunnus maccoyii), but Bruvs had more bottom fish. It made it clear,” he says.

This dual approach is especially valuable in remote and challenging environments, such as Australia’s great environment. In this environment, surveillance of key species (surveillance of conservation concerns with high economic value) provides important insights into reef health.