Review of Related Literature

Jun 21st, 2015
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The sea-star was first found in Tasmania in 1986, but at the time was mis-identified as a native species. It was not until 1992 that the sea-star was identified as A. amurensis, a species which is not native to Australian waters.

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REVIEW OF RELATED LITERATURE ON CLASS ASTEROIDEA (SEA STARS)Submitted to:Mrs. Astrid SincoSubmitted By: Connie Ryan V. Edpalina Bio 6 EDAReview of Related LiteratureForeign SettingThe sea-star was first found in Tasmania in 1986, but at the time was mis-identified as a native species. It was not until 1992 that the sea-star was identified as A. amurensis, a species which is not native to Australian waters. The sea-star is a large voracious predator, reaching sizes 40 to 50 cm in diameter. In its native range, the sea-star prefers water temperatures between 7 and 10o C, but has adapted to warmer waters (up to 22o C) in Australia and other countries."In one year the sea-star is capable of increasing its diameter by 8cm. It is capable of reproducing at 10 cm. In Australia spawning occurs during winter (July to October) at temperatures of 10 to 12o C when females may carry up to 20 million eggs per adult. Fertilisation is external and fertilised eggs develop into free swimming larvae that remain in the plankton for around 90 days, before settling and metamorphosing into juvenile seastars. The live-bearing sea star is restricted to the south eastern coast of Tasmania. Unlike other species whose larval young may be dispersed great distances by ocean currents, live-bearing sea stars are restricted to their parental locations. They live in rocky crevices and are often attached to the underside of ro

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