This article has been reviewed according to Science X's editorial process and policies. Editors have highlighted the following attributes while ensuring the content's credibility: Green sawfish, distinguished by their long, sharklike bodies and tooth-lined "saw" on the front of their heads, are on the verge of extinction, largely due to overfishing and habitat loss. However, a study from Murdoch University's Centre for Sustainable Aquatic Ecosystems, at the Harry Butler Institute, has revealed that northern Australia, particularly Western Australia, could play a crucial role in the species' recovery.
Led by postdoctoral research associate Jack Ingelbrecht and associate professor David Morgan, a team from Murdoch University, supported by the Western Australian Marine Science Institution, the Save Our Seas Foundation and BCI Minerals, has reviewed decades of research on the green sawfish to provide a crucial resource to guide future conservation. The findings are published in the journal Reviews in Fish Biology and Fisheries. "Renowned zoologist Ferdinando Boero said it best—'you can't protect what you don't know,'" Ingelbrecht said.
"It's incredibly difficult to stay up to date with research on any topic, particularly when there's a lot of information to cover. Ultimately, if conservation experts don't fully understand the species they're trying to protect, they can't implement the most suitable recovery initiatives." "By synthesizing the current knowledge of green sawfish, we wanted to provide an all-in-one resource to guide conservation efforts and researchers alike," he said. The review highlighted that northern Australia is one of the last remaining strongholds for the green sawfish.
"Although the species has disappeared from large parts of its historic range, including parts of Africa and southern Asia, northern Australia still supports some of the last intact populations left anywhere on Earth," Ingelbrecht said. Ingelbrecht emphasized that this has likely had a positive impact on green sawfish research in Australia. "To research something, you first need specimens to study.
Naturally, opportunities for green sawfish research will be greater in areas where this species still occurs in relatively high numbers." "Our review found that, for decades, Australia has been the global leader in green sawfish research. This is partly because green sawfish populations have been wiped out in many countries, but still exist in Australia," he said. "We're fortunate that the main factors responsible for the global decline of sawfish are less severe in northern Australia." "Interestingly, when we looked at the specific types of information that have been produced, we found that Australia has also been at the forefront of almost every major subdiscipline of research relating to green sawfish." The review also identified several key knowledge gaps, which will continue to hinder recovery efforts until they are addressed.
"Sadly, when it comes to the research areas most relevant to conservation—the size of remaining populations, the locations of critical habitat and the number of mature individuals present in the wild—we realized that there's very little information currently available." Ingelbrecht also said that, due to its position as the global leader in green sawfish research, Australia has an increased responsibility to support recovery initiatives through scientific input. "Research is the lifeblood of conservation. In order to be successful, recovery efforts often need to be tailored toward the species they're intended for.
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