The Marine Environment of the Pitcairn Islands - Pew Environment ...

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Species Authority Common name (if known) Balaenoptera acutorostrata Megaptera novaeangliae Balaenoptera edeni Family Delphinidae Delphinus delphis Grampus griseus Lagenodelphis hosei Stenella attenuata Stenella coeruleoalba Steno bredanensis Feresa attenuata Globicephala macrorhynchus 104 Lacépède, 1804 (Borowski, 1781) Anderson, 1879 Linnaeus, 1758 (G. Cuvier, 1812) common or dwarf minke whale humpback whale Bryde’s whale (also known as Eden’s whale) IUCN code Oen Pit Hen Duc Offshore Notes LC • This species has only been recognised as separate from the Antarctic minke whale B. bonaerensis in the past 15 years. EN • • While most humpback populations worldwide have been assessed as being of ‘least concern’, a distinct Oceania subpopulation (breeding stock F2) is now recognised, which is endangered. Regularly seen nearshore off Pitcairn from June–September (Horswill 2007). DD • Within the past 20 years, this species of baleen whale has been classified as a ‘complex’ of a number of species, as there has been confusion regarding its true identification by taxonomists. The ‘ordinary’ Bryde’s whale (the species given here) is known to have a distribution throughout the eastern tropical Pacific and across the South Pacific down to about 35°S. (short-nosed) common dolphin LC • Risso’s dolphin LC • Fraser, 1956 Fraser’s dolphin LC • (Gray, 1846) pantropical spotted dolphin LC • (Meyen, 1833) striped dolphin LC • (G. Cuvier in Lesson, 1828) rough-toothed dolphin Gray, 1874 pygmy killer whale Gray, 1846 short-finned pilot whale LC • DD • DD • Orcinus orca (Linnaeus, 1758) killer whale DD • Pseudorca crassidens (Owen, 1846) false killer whale DD • Stenella longirostris Family Kogiidae (Gray, 1828) spinner dolphin DD • Kogia breviceps (de Blainville, 1838) pygmy sperm whale Kogia sima (Owen, 1866) dwarf sperm whale Family Physeteridae Physeter macrocephalus Family Ziphiidae Mesoplodon densirostris Ziphius cavirostris Linnaeus, 1758 (de Blainville, 1817) DD • DD • sperm whale VU • Blainville’s beaked whale Cuvier, 1823 Cuvier’s beaked whale DD • LC • • Carcass found on reef flat at Ducie, Nov 1991 (R.A. Irving, pers. obs.) The Marine Environment of the Pitcairn Islands The Marine Environment of the Pitcairn Islands 105
Robert Irving Terry Dawson Robert is recognised as being the UK’s leading authority on the marine life of the Pitcairn Islands. His first visit to Pitcairn was in 1991 when he took part in the Sir Peter Scott Commemorative Expedition to the Pitcairn Islands. The expedition centred on investigating the terrestrial and marine ecology of Henderson Island, with over 25 scientists from all over the world taking part during its 15 month lifespan. He and his colleague Jo Jamieson spent a very enjoyable 3½ months ‘marooned’ on Henderson (with five fellow scientists), diving all around the island and recording, collecting and taking over 2,500 underwater photographs. They also managed to dive around Oeno and Ducie. Although he spent a week on Pitcairn too, it wasn’t until 2003 that he managed to dive around the island, when he acted as scientific advisor to a 3-week long UK Joint Services diving expedition. His third visit to Pitcairn was in 2011 when he and Terry Dawson spent 10 days on the island as part of a UK Darwin Initiative project investigating the management of the island’s nearshore waters. Robert is based in Devon in SW England where he runs his own marine environmental consultancy firm, Sea-Scope. Most of his time is spent on UK marine conservation projects, though over the years he has undertaken projects in the Turks & Caicos Islands, Tanzania, Saudi Arabia and the United Arab Emirates. He has also taken part in diving expeditions to Indonesia, Ascension Island and Sri Lanka. Robert has written numerous articles on marine conservation issues, over 40 scientific reports papers, as well as two books. 106 Professor Terry Dawson holds the SAGES (Scottish Alliance for the Geosciences, Environment and Society) Chair in Global Environmental Change in the School of the Environment, University of Dundee. His earlier career included academic appointments at the Universities of Oxford (1998-2004), Edinburgh (2004-2007) and Southampton (2007-2011). His research interests are very broad, but they mainly focus on environmental change, ecology and biodiversity conservation with a special interest in island biogeography. His passion for the marine environment began as a volunteer member of the 1985 underwater survey of Hong Kong shortly after qualifying as a British Sub-Aqua Club Advanced Diver whilst living there. This was followed up with a diving expedition to the Solomon Islands, Papua New Guinea and Coral Sea in 1986. Since then, Terry has undertaken a wide variety of projects in Borneo, Galapagos Islands, Seychelles, Mozambique, Madagascar and Cuba. His first visit to Pitcairn Island was in 2010 which was followed up with a second visit the following year as part of a UK Darwin Initiative project. He is a Fellow of the Royal Geographical Society and has published over 120 scientific manuscripts, books and reports to date. The Marine Environment of the Pitcairn Islands The Marine Environment of the Pitcairn Islands 107
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The Marine Environment of the Pitca
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First published in Great Britain in
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Executive summary The extent of the
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No. of marine species in major taxo
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