Nelson Leader : February 14th 2013
27 THE NELSON LEADER, FEBRUARY 14, 2013 FEATURE 5162964AB • Based on class of 30 Lose weight for life! This series of lifestyle-changing classes in a supportive environment will give you the secrets to permanent weight loss and great health. Phone Jude NOW to register: 544 6188 This programme was put together by 3 nurses from Hawkes Bay, NZ Community Weight Loss Challenge! Where the Biggest Loser WINS Starting: March Secure your space TODAY! • The Biggest Loser Wins $300* • 2nd Wins $200* • 3rd Wins $100* • 12 weeks of FUN • Personal Coaching • Weekly Prize draws • Loads of Encouragement!! • $59 for entire 12 weeks AFTER DEATH PET CARE Pet Cremations Burials & Memorials Nelson based A dignified farewell for your pet Letting Go With Love... Al&JoReid (03) 548-5072 or 0800 738 386 email@example.com www.petfunerals.co.nz 4874716AA Entrance through Bay Nurseries OPEN 7 DAYS Courtesy Trailers, EFTPOS, Bateup Rd, Richmond Ph/Fax 544-2076 NOW AVAILABLE AT BAY LANDSCAPES for all your landscape supplies 5175343AA PEA STRAW FIRST OF THE SEASON GET IT QUICK to learn more phone 03 546 2835 Get your ads working for you Useful tips for advertising #1 People have short memories and a one-off advert will fade into the past. You need to keep reminding them that you are here and keep your business top of mind! FREQUENCY IS THE KEY! Identifying NZ's sea squirts made easier Little squirt: The sea squirt Eudistoma elongatum smothers an oyster rail in the Bay of Islands. Photo: MIKE PAGE The potential impact of some of these sea squirt species on the shellfish aquaculture industry in particular, can be serious. When you are at the beach or harbours this summer, don't be surprised if you see sea squirts. These common marine animals we see attached to rocks and wharf piles have two siphons on the top of their bodies, one to draw in water and the other to expel it. When disturbed, sea squirts contract their siphons, squirting streams of water. Nelson-based Niwa scientist Mike Page said Niwa has created a new, colourful and intuitive guide to sea squirts found around New Zealand coasts and ports. Packed with photographs of 28 species, the guide aims for easy identification of sea squirts in the field and is a useful tool for keen underwater observers. The guide includes some of the recently arrived invasive species of sea squirt that have colonised our ports and harbours, as well as many benign native species. Mike said it covered species Niwa was already aware of, so if you spot what you believe is a new one, please let the Min- istry for Primary Industries know on their freephone 0800 80 99 66. Checks could be made to make sure it was not likely to be troublesome. Sea squirts are among the most com- monly found fouling animals in ports and harbours around the world, including New Zealand's. They settle and grow in great abun- dance on submerged structures such as wharf piles, seawalls, ship hulls and aquaculture structures. In some countries, they are eaten by humans. The guide gives important information about each species -- its appearance, whether it is native, its habitat, how com- mon it is, its distribution around New Zealand, and what threats, if any, it poses to New Zealand ecology and aquaculture. While most native species are found in low numbers in inter-tidal and sub-tidal environments around New Zealand, non- indigenous species can be highly success- ful, often reaching densities that pre- clude other species. The potential impact of some of these sea squirt species on the shellfish aquaculture industry in particular, can be serious. Sea squirts have abundant, highly mobile larvae that settle and grow quickly into adults, competing with other species for food and space. Some species are able to replicate themselves asexually, which causes very rapid growth of the colony. Rapidly growing sea squirt colonies, such as Didemnum vexillum, can over- grow and smother mussels. Pyura praeputialis forms dense mats that alter natural habitats used by other species. We designed the guide because people want to know what they are, particularly when they are on the hunt for non- indigenous and invasive organisms,'' Mike said. Therefore the guide will be useful for the Ministry for Primary Industries, Department of Conservation, regional councils, district councils, schools, universities and port authorities.'' The guide contains easy-to-follow diag- rams of sea squirt biology and flow charts for species identification. It uses clear and user-friendly icons for each species to show key information about its habits and characteristics. The sea squirt species are illustrated with high-quality images of the animals in their habitat. As far as possible, we have used iden- tifying features that can be seen with the unaided eye or a magnifying glass and language that is non-technical,'' Mike said. The guide is dynamic and new species will be added as they are discovered. The guide will be updated on Niwa's website: https://www.niwa.co.nz/sites/default/ files/portsharbour_ascidian_guide.pdf.
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