Arnold Mangott

Nutritional Evaluation of Australian Microalgae as Potential Human Health Supplements

This study investigated the biochemical suitability of Australian native microalgal species Scenedesmus sp., Nannochloropsis sp., Dunaliella sp., and a chlorophytic polyculture as nutritional supplements for human health. The four microalgal cultures were harvested during exponential growth, lyophilized, and analysed for proximate composition (moisture, ash, lipid, carbohydrates, and protein), pigments, and amino acid and fatty acid profiles. The resulting nutritional value, based on biochemical composition, was compared to commercial Spirulina and Chlorella products. The Australian native microalgae exhibited similar, and in several cases superior, organic nutritional properties relative to the assessed commercial products, with biochemical profiles rich in high-quality protein, nutritious polyunsaturated fats (such as α-linolenic acid, arachidonic acid, and eicosapentaenoic acid), and antioxidant pigments. These findings indicate that the microalgae assessed have great potential as multi-nutrient human health supplements.

Live-aboard dive boats in the Great Barrier Reef: regional economic impact and the relative values of their target marine species.

Using data collected from more than 1,000 tourists on live-aboard dive boats operating in the Cairns/Cooktown management area of the Great Barrier Reef, this paper estimates the regional economic impact of that live-aboard industry. It also uses a subset of these data (247 respondents) to investigate some of the relative ‘values’ of key marine species seen on the trips that included the Coral Sea location of Osprey Reef and which targeted multiple species of wildlife. The authors find that (i) each year, the live-aboard dive boats are directly responsible for generating at least AU

Comparison of astaxanthin accumulation and biosynthesis gene expression of three Haematococcus pluvialis strains upon salinity stress

16 million worth of income in the Cairns/Port Douglas region; (ii) visitors participating in different types of trips gain their highest levels of ‘satisfaction’ from interacting with different types of species; and (iii) visitors to Osprey Reef would be willing to pay more for a ‘guaranteed’ sighting of sharks than they would for a ‘guaranteed’ sighting of large fish, marine turtles or a ‘wide variety of species’.