Fisheries Oceanography II, Chatham Rise (TAN1116) - Voyage Log

NIWA's research vessel Tangaroa was at sea 2-20 November 2011 for the TAN1116 voyage.

During TAN1116, NIWA conducted a survey of fish-food in the western and mid-Chatham Rise. This is a very productive part of our ocean, an important area for the New Zealand commercial fishing industry. The voyage is part of an ongoing program that focuses on ecosystem-based management of ocean resources: we are trying to understand how the ecosystem affects fish, and how fisheries affect the marine ecosystem. For that, one needs to understand the local marine food web - i.e. who eats whom.

Previous work has established what fish eat, but in this voyage our scientists were going to look to see exactly where the fish food is, how much is around, and what the fish food (shrimp, salps, other small fish) are eating.

For more information on this research, see - Trophic modelling for sustainable New Zealand fisheries.

The links below are for updates and photos from the voyage.

This is the second voyage in a series investigating the Chatham Rise ecosystem. This survey is funded by the Ministry of Science and Innovation. 

Day 15

Technical update day 13-15

Day 14

Technical update day 13-15

Gallery - Life on board

Day 13

Technical update day 13-15

Gallery - Noctiluca scintillans (phosphorescent algae) bloom

Day 12

Technical update day 12

Gallery - toadfish

Days 10-11

Technical update day 10-11

Day 9

Technical update day 9

Day 8

Technical update day 8

Day 7

Gallery - specimens

Technical update day 7

Day 6

Technical update day 6  

Day 5 

Technical update day 5 

Gallery - The multicorer

The multicorer is used to take samples of the surface sediments of the ocean, which contain many of the minute organisms making up up the highest biomass on the planet. 

Day 4

Technical update day 4. 

Gallery - Hagfish!

A beam trawl brought up a hagfish!

Day 3

Technical update day 3

Gallery - Changeable Weather

Day 2

Technical update day 2

Gallery - Midwater trawling

Midwater trawl nets - very large, fragile nets - are used to catch 'clouds' or groups of fish or invertebrates that appear at a particular depth under the ship 

Day 1

Technical update day 1

Gallery - an introduction to the voyage and equipment

Proposed 8 sampling strata on Fisheries Oceanography II (numbered). Green = primary stations. Blue = secondary stations. Pink = voyage track. [Note that this is indicative only as the stations will be placed randomly within the strata and the best voyage track then determined.] North/South Island outlined in bold black.
The deck crew pulls in the last bit of the net. Note the stern ramp is down - most crew/passengers are not allowed on the trawl deck at this time. Credit: Kareen Schnabel/NIWA
Research subject: Oceans