DistantNews
Support us
🇦🇺 Australia /Environment & Climate

Tasmanian fish species at 'imminent risk' of extinction faces threat from prized introduced trout

From ABC Australia · () English

Translated from English, summarized and contextualized by DistantNews.

At a glance

News Named sources Ongoing story
  • Conservation efforts are underway to save the critically endangered swan galaxias, a native Tasmanian fish species.
  • Introduced trout pose the primary threat to the swan galaxias, which has an estimated 6,000 individuals remaining.
  • While trout fishing is economically and socially important in Tasmania, authorities are balancing this with the need for native species conservation.

Tasmania is undertaking critical conservation efforts for the swan galaxias, a small native freshwater fish species now considered at "imminent risk of extinction." With only an estimated 6,000 individuals left, the species is a key focus for understanding Tasmania's evolutionary history, having diverged from its closest ancestors five million years ago.

They're a species that has split from its closest living ancestors five million years ago, so it's a very interesting fish to understand how Tasmania has evolved over the last millions of years

— Zak WheatonExplaining the scientific significance of the swan galaxias.

The primary threat to the swan galaxias is the introduction of trout and redfin perch, species brought to Australia in the 1800s for European colonists. These invasive fish prey on the native galaxias and have already contributed to the extinction of another galaxiid species. While redfin perch are targeted for eradication, trout remain an entrenched part of Tasmania's fishing culture.

We [IFS] have to be very mindful that we have a substantial trout fishery that contributes to social wellbeing and economy, but we also have to wear that other hat of conservation as well

— Rob FreemanDescribing the challenge of balancing economic interests with conservation needs.

This presents a complex challenge for the state's Inland Fisheries Service (IFS). Biologist Rob Freeman acknowledged the economic and social benefits of the trout fishery, particularly in areas like the Great Lake. However, the IFS also has a conservation mandate. "We have to be very mindful that we have a substantial trout fishery... but we also have to wear that other hat of conservation as well," Freeman stated.

We have to be very aware of any impacts that any sort of management regulations that we make, [and] how that may or may not impact on native species.

— Rob FreemanHighlighting the need to consider native species when implementing trout fishing regulations.

Freeman noted that trout are highly invasive and nearly impossible to remove once established. Despite this, increased awareness of their impact has led to more regulations. The IFS is working to balance the demands of the trout fishery with the urgent need to protect native species like the swan galaxias, aiming to improve management strategies to mitigate harm to vulnerable wildlife.

Can we do better? We can always do better. But from what I have seen in the past, and to where we've arrived now, we're basically

— Rob FreemanReflecting on the progress and ongoing efforts in managing the trout fishery and its impact on native species.
DistantNews Editorial

Originally published by ABC Australia in English. Translated, summarized, and contextualized by our editorial team with added local perspective. Read our editorial standards.

More Stories

From Our Blog