Composition of Starfish-Information Sheet

Investigating the bioactive potential of Pātangaroa for commercial use, amid ecological impacts in Ōhiwa Harbour.

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Introduction to Pātangaroa

The research focuses on the Pātangaroa, particularly Coscinasterias muricata and Sticaster australis, two species of sea stars causing ecological imbalance in Ōhiwa Harbour, New Zealand. Their predation on shellfish has necessitated a deeper look into their bioactive components, such as proteins, lipids, and carbohydrates, to explore potential commercial applications. This is especially pertinent for marine collagen, sought after in the cosmetics industry. The study's comprehensive data collected between 2021 and 2022 serves as a guide for future economic prospects in managing these species' populations.

Detailed Composition and Bioactive Analysis

Analysing the composition of Pātangaroa reveals a rich presence of proteins, particularly collagen, which varies seasonally. The freeze-drying process is detailed, reducing moisture content and permitting a refined analysis of other nutrients. Proteins, amino acids, lipids, carbohydrates, and their specific content ratios are examined meticulously. The role of these compounds in nutrition and therapeutics, such as omega-3 fatty acids and glycosaminoglycans, is discussed. The study also delves into the minor nutrients and elements present in the sea stars, including carotenoids and heavy metals, providing a thorough insight into the bioactive potential of these species.

Conclusions and Future Directions

This research concludes that while Pātangaroa populations pose ecological challenges, they also offer valuable bioactives for various industries. The presence of bioactive proteins, lipids, and carbohydrates suggest potential commercial applications, yet the low overall lipid content suggests limited bioactive prospects in that area. The study acknowledges the need for careful regulation due to the proximity of heavy metals to limits, though generally below concern levels. Future recommendations include continued monitoring and exploring sustainable harvesting methods to manage Pātangaroa populations while considering potential commercial gains.

Key insights
01
High protein and collagen levels in Pātangaroa offer economic promise

The research identifies high protein and collagen concentrations, particularly in Coscinasterias muricata and Sticaster australis, which could position them as a valuable resource for the cosmetic industry. Harnessing these could advance economic plans and contribute to ecological management.

02
Potential applications in nutraceuticals and mobility treatment arise from carbohydrate analysis

Glycosaminoglycans, derived from the carbohydrate content in Pātangaroa, have significant potential in treating mobility ailments like osteoarthritis. This finding signals a new horizon in the nutraceutical field and invites exploration into sustainable treatment alternatives.

03
Prudent extraction and use of Pātangaroa considering heavy metal content

The study's findings on the presence of heavy metals within regulatory limits stress the importance of continued testing, particularly for cadmium. This is crucial for ensuring the safety of derived products and informs best practices for sustainable Pātangaroa harvesting.

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