Possible Shifts in the Ranges of Numerous Temperate Southern Australian Inshore Reef Fish Species

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Further sightings of the Western Crested Morwong at Port Noarlunga is a good summary of what we have learned about the Western Crested Morwong’s presence in SA. Interesting that, as far as I know, these recent sightings have all been at Port Noarlunga Reef and under the outer jetty. This […]

Interactions Between Common Weedfish, Heteroclinus perspicillatus, and Rockpool Shrimp, Palaemon serenus

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In 2011, this Common Weedfish, Heteroclinus perspicillatus, was stalking a Rockpool shrimp, Palaemon serenus, which it later consumed. (As posted at https://inaturalist.ala.org.au/observations/10002537#activity_comment_948643c9-28f5-4479-b730-e7f9dd2e9a28 ) Both these weedfishes and shrimps are very common in these particular tide pools and channels at Haycock Point, Carrickalinga. The weedfishes and shrimps often appear at peace […]

Nature Glenelg Trust’s involvement in researching and monitoring Goolwa pipi population dynamics

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The Nature Glenelg Trust (NGT) has been involved in researching and monitoring Goolwa pipi (cockles) population dynamics and associated aspects e.g. recreational pipi extraction impacts. Open season is currently November to May, with a maximum daily bag limit of 300 cockles daily per person. There is also a minimum size […]

Recreational Fishing’s Possible Impact On Wrasses That Have Historically Helped To Limit Sea Urchin Densities

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Canopy algae are a major component of Blue Carbon fixation. Whilst diving at The Bluff (Rosetta Head) on 27th October 2022, I found this Western Pacific Purple Sea Urchin, Heliocidaris erythrogramma: – I have posted it on iNaturalist, along with the following details, at https://inaturalist.ala.org.au/observations/140727962 . Overall, I saw relatively […]

Habitat loss, habitat degradation and the Port River dolphins

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I see similarities between the recent and seemingly quite rapidly escalating decline in Port River dolphin numbers and the continuing extinction trend in the bushland birds of Adelaide and the Mount Lofty Ranges. Ornithologists have been saying for decades that the many smaller, specialised birds (such as robins, flycatchers, tree-creepers […]