sail-world.com
 
 
News Home Cruising Photo Gallery Video Gallery

 

Sail-World.com : Census time for fish and habitats on New Zealand's continental shelf

Census time for fish and habitats on New Zealand's continental shelf

'A sponge garden with gorgonians DTIS - in 70 m water off North Cape'    NIWA

NIWA's latest voyage of discovery will examine the expansive continental shelf around New Zealand looking for our biodiversity hotspots.

NIWA's Research Vessel Tangaroa sets sail tomorrow, on the second 25-day leg of a 42-day voyage of discovery, to survey biodiversity and habitat hotspots.

Tangaroa will be examining a part of the most extraordinary undersea continent on Earth, some of it never before explored. Scientists will focus on areas at depths between 40-200 metres around New Zealand's continental shelf.

The aim of the Land Information New Zealand (LINZ), Ministry of Fisheries, and Ministry of Science and Innovation (MSI), funded voyage is to improve our knowledge of 'living habitats', and their biodiversity, ecological, and fisheries roles on the continental shelf.

The voyage leader, NIWA fisheries ecology scientist Dr Mark Morrison, says the team is 'hoping to discover new and important ecological habitats, and see what fish and other species are associated with them, so that we can better manage them.'

Tangaroa will journey from Wellington to Fiordland; around the southern area of Stewart Island to the Southland coast including: Kaikoura to the north, Canterbury Bight, the Otago shelf , Solander Island, Puysegur Bank, and the coast off Dusky Sound. Then Tangaroa will head up to Mahia Peninsula in the East Cape Region, before ending up in Auckland, a trip distance of 2700 km.

Key sites will be mapped and assessed for their seafloor-associated plant and animal collections.

The scientists are working to develop a national fish-habitat classification scheme. The scheme will classify habitats from estuaries right out onto the continental shelf.

The classification scheme will also identify potential threats and stressors to the environment. For example, sediment from the land impacts on fish habitats, as does over-fishing, mining and dredging.

Gathering information from the seafloor Scientists on the R.V. Tangaroa will use a number of techniques to gather information during the voyage.

The Deep Towed Imaging System camera (DTIS) will be used to take pictures and videos of deep-sea biodiversity and seafloor habitats at every stage of the journey capturing more than 200 hours of underwater footage,' says Dr Morrison.
Multi-beam echo sounders will be used to image large areas of the seafloor, which will then be combined with the DTIS footage to create three-dimensional seafloor habitat maps. Multi-beam sonar will scan a wide swath of the seabed in great detail by emitting a fan of sound beams onto the seafloor.

Biological sampling will be conducted for formal taxonomic species identifications, including key species that are 'habitat-formers' around New Zealand's mainland continental shelf.

'We will be using the multi-beam sonar to inform the biological sampling,' says Dr Morrison, 'gaining a good idea of what habitat types exist and what fish associate with them. We are especially interested in finding and identifying fish nursery habitats. From this work, we hope to be able to predict where important fish habitats occur around other areas of New Zealand's full continental shelf.

New Species We also expect to see some new species given that these habitats have not been sampled much in the past. For example, in the recent offshore Bay of Islands Ocean Survey 20/20 survey, discoveries included new species of algae, a cusk-eel, a rockfish, and a small fish known as a 'triple-fin'.

The areas of most interest to the scientists are those with outstanding or uncommon habitats. There is particular emphasis on areas where there are large numbers of organisms that group together to form a habitat, including organisms such as corals, gorgonians, bryozoans, sponges, ascidians, bivalves, tubeworms, sea pens, and hydroids. Such habitats are disproportionately important in the ecological 'goods and services' that they provide, many of which are of direct benefit to humans, such as fisheries production.

The areas that the scientists will visit are based on existing scientific knowledge of likely ecological 'hotspots', and information gleaned from interviews with 50 experienced fishers. 'We've based a lot of where we are going on the information provided to us from fishers - from the areas that they have fished in, and from historical information,' says Dr Morrison.

Dr Morrison says the surveys are very important for New Zealand fisheries and for biodiversity classification. 'If we don't know what habitats are out there, it is difficult to manage them wisely so the benefits that they provide us are conserved.'

NIWA website




by NIWA

  

Click on the FB Like link to post this story to your FB wall

http://www.sail-world.com/index.cfm?nid=83326

7:26 AM Tue 10 May 2011 GMT






Click here for printer friendly version
Click here to send us feedback or comments about this story.


News - USA and the World







Soling North American Championship concludes on Lake Erie by Canadian International Soling Association,






































Starboard Hatteras Wave Jam day 5 by American Windsurfing Tour,


















470 Men and Women Worlds - Champions decided in Santander by International 470 Class Association,




ISAF Sailing Worlds - Caleb Paine through to Finn medal race + video
ISAF Worlds - 49er, 49erFX, Finn and Nacra 17 Rio 2016 spots taken
ISAF Sailing Worlds - 470 Women's medal race images by Thom Touw
ISAF Sailing Worlds, Santander: Scott all set to lift Finn world title
ISAF Sailing Worlds - 470 Men's medal race images by Thom Touw
ISAF Sailing Worlds, Santander - Aussies and Austrians claim 470 gold
ISAF Sailing Worlds, Santander: 470 awards images by Sail-World.com
ISAF Sailing Worlds, Santander - 470 medal race images by Jesus Renedo
Annapolis-to-Newport Race - 'What to Expect' Seminar to take place
Royal Cup Marina Ibiza - No racing on penultimate day
Belcher takes record fifth 470 World Championship
ISAF Sailing World Championships - Santander - Day 8 video highlights
2014 Great Lakes Team Racing Championship about to set off
2014 Etchells North American Championship - Day 1
2014 U.S. Multihull Championship - Day 1
2014 Chicago Match Cup - Repechage top four determined in final flight
J/24 World Championship - 35th anniversary preview
470 Men and Women Worlds - Santander medal race line-up confirmed
ISAF Sailing Worlds, Santander - Day 8 images by Sail-World.com
Royal Cup Marina Ibiza - Quantum Racing stumbles in coastal race
ISAF Sailing Worlds, Santander - Americans ready for 470 medal races   
ISAF Sailing Worlds, Santander: Action ramps up with end zone in sight   
Big Boat Series - It's not the size, it's the length   
ISAF Sailing World Championships Santander - Double French RS:X gold   
ISAF Sailing Worlds, Santander - Day 8 images by Sailing Energy   
ISAF Sailing Worlds - Finn leaders emerge from shifty Santander breeze   
ISAF Sailing Worlds, Santander - RS:X winner images by Barbara Sanchez   
ISAF Sailing Worlds, Santander - Rio 2016 470 spots awarded   
52 Super Series 2015 - Outlook looks hot for the 52 Super Series   
Starboard Hatteras Wave Jam - Another early start on day 4   
ISAF Sailing World - First entry leaves sailor's reputation in tatters   
2014 Chicago Match Cup - Four go through to quarter finals   
470 Men and Women Worlds - Champs take over leaderboard   
ISAF Sailing World Champ - Buckingham finishes with career-best result   
America's Cup: Oracle's Larry Ellison to step down as CEO   
Classic Yacht Regatta - Sonny takes top classic prize   
ISAF Sailing Worlds, Santander - Buckingham finishes with career best   
ISAF Sailing Worlds, Santander - Rio 2016 RS:X spots claimed   
ISAF Sailing Worlds - Leaderboards shaping up in Santander + Video   
ISAF Sailing Worlds, Santander - Giles Scott continues to extend lead   


For this week's complete news stories select    Last 7 Days
   Search All News
For last month's complete news stories select    Last 30 Days
   Archive News







Sail-World.com  


















Switch Default Region to:

Social Media

Asia

Australia

Canada

Europe

New Zealand

United Kingdom


http://www.sail-world.com/event_images/image/Twitter_logo_small.png http://www.sail-world.com/event_images/image/FaceBook-icon.png  http://www.sail-world.com/event_images/image/RSS-Icon.png

United States

Cruising Northern

Cruising Southern

MarineBusiness World

PowerBoat World

FishingBoating World

 

Contact

Commercial

News

Search

Contact Us

Advertisers Information

Submit news/events

Search Stories/Text

Feedback

Advertisers Directory

Newsletter Archive

Photo Gallery

 

Banner Advertising Details

Newsletter Subscribe

Video Gallery

Policies

 

 

 

Privacy Policy

 

 


Cookie Policy

 

 



This site and its contents are © Copyright TetraMedia and/or the original author, photographer etc. All Rights Reserved.  Photographs are copyright by law.  If you wish to use or buy a photograph contact the photographer directly.
XLXL NEW US
LocalAds   DE  ES  FR  IT