condensed discuss document expanded export feedback print share remove reset document_white enquire_white export_white report_white

Blog

From shallows

From shallows

by the Kermadec expedition team
Sat, 29 Oct 2016

Moving from the familiar shores of Raoul Island to lesser known higher latitude Islands

The dive team: (L-R) Dave, Crispin, Emma, Libby and Severine, all ready to head off on a dive.

© Hamish McCormickThe Kermadec Ridge Expedition 2016

Over the last few day we, the “dive team”, including David Aguirre, Emma Betty and Libby Liggins from Massey University, Severine Hannam from the Auckland Museum, and Crispin Middleton from NIWA, have been recording corals, fishes, urchins and other invertebrates from the shallow waters (0-30m) surrounding Raoul Island to complement the biodiversity records from the deeper ocean collected by the other scientists onboard.

A photo quadrat and collections of corals to quantify coral communities.

© Crispin MiddletonThe Kermadec Ridge Expedition 2016

Dave and Crispin have photographed and collected several new coral records over the past few days. Many of these species would form vast coral reefs in warmer tropical seas, but in the subtropical waters of the Kermadec Archipelago, they typically form smaller colonies. These new records will help us understand the formation and maintenance of shallow water communities of the islands and to predict how they may change in future.

Dried coral skeletons ready for scanning electron microscopy imaging and analysis

© Crispin MiddletonThe Kermadec Ridge Expedition 2016

Severine, Emma, and Libby have been passing their expert eyes over the seaweed, fishes, and invertebrates that live in the shallow waters of Raoul Island and surrounding islets. Sometimes our dives cover a mere 10 square meters, yet they reveal several unknown and peculiar taxa, such as a hermit crab that seemingly farms anemones on its shell and shrimps that shelter amongst the forest of spines created by a dark red-brown coloured urchin species rarely seen on the New Zealand mainland.

Dave collecting coral samples from off a rock.

© Crispin MiddletonThe Kermadec Ridge Expedition 2016

The weather has enabled us to meet all of our science objectives at Raoul, complementing past knowledge and forging new research agendas for the region. Raoul has also provided a few unexpected gems such confirming previously uncertain records of elusive tropical fish species. We have had the fortune of being accompanied by turtles, giant black spotted groper, and the ever curious, but thankfully somewhat shy, Galapagos sharks. Humpback whales are omnipresent – we hear their song underwater, and sometimes even see them cruising past.

Diving at Raoul island

GALLERY

As the expedition heads south, the question is what will be found now? We leave the relatively well surveyed and familiar waters of Raoul to explore at Macauley Island and L’Esperance Rock. Team members have previously dived these southern islands only a few times – there is certainly much scope for the formation of new knowledge and discovery.

The expedition team congratulates Crispin for being announced as the New Zealand Geographic Wildlife photographer of the year! A massive achievement and reward for his dedication and talent. We feel slightly guilty for not using his photographic skills to their full extent, but there are always opportunities for his keen eye to find something to showcase. Crispin accepted his award in style on Thursday night from the satellite phone on the bridge of the Tangaroa.

  • Post by: Kermadec expedition team

    The Kermadec Ridge expedition is a multidisciplinary expedition to explore the waters around the Kermadec Islands. Expedition participants are from NIWA, the Auckland Museum, Te Papa, the University of Auckland, Massey University, the Department of Conservation and The Pew Charitable Trusts.