Rockhopper Penguin There has been a dramatic decline (estimated at 80%) in the population of Rockhoppers over at least the past 80 years. In 1995, Falklands Conservation counted 300,000 breeding pairs (600,000 birds); in 2005 this number was down to 210,400 pairs. The reasons for this decline are not yet fully understood and are in line with similar reductions in other crested penguin populations elsewhere in the world (Auckland, Antipodes and Campbell Islands). [rokdownload menuitem="100" downloaditem="34" direct_download="false"]Download the Rockhopper Penguin BirdLife Report 2010 - proceedings of an international workshop 2008, Edinburgh Zoo[/rokdownload] A detailed analysis is available to subscribers of Waterbirds (www.waterbirds.org/journal.htm) entitled: Re-evaluation of Historical Rockhopper Penguin Population Data in the Falkland Islands by Klemens Putz, Andrea P Clausen, Nic Huin and John P Croxall. Ref: Waterbirds 26 (2): 169-175, 2003 Many Rockhopper penguins were poisoned by the Harmful Algal Bloom of 2002/03. It is thought that changes in ocean productivity and temperatures, possibly driven by climate change negate recovery from such population crashes. The most recent 2010 census indicates that breeding pairs have increased since 2005 and numbers are similar to those ten years ago, suggesting that the current population is stable or oscillating rather than declining or recovering. More news on the Rockhopper penguin census 2010 to come...
The Rockhopper Penguin had been considered as a single species throughout its circum-polar range, where it breeds on sub-Antarctic oceanic islands in the Atlantic Ocean, Indian Ocean and to the south of New Zealand. Birds from the three areas show differences in appearance notably in size, length of the crest plumes, the underside of the flipper and the skin colour at the birds gape. Following new research recently reviewed by BirdLife International, who manage the species red list of birds on behalf of The Southern Rockhopper is split into 2 sub-species: Eudyptes chrysocome chrysocome breeds in the Falklands and South America, whilst Eudyptes chrysocome filholi breeds on Marion, Crozet, Kerguelen, Heard, Macquarie, Campbell, Auckland and Antipodes Islands. The Southern Rockhopper Penguin is classified as "Vulnerable" by the IUCN red list. The Falklands hold 20% percentage of the world population of Southern Rockhopper Penguin.
Macaroni Penguin In the Falklands, Marcaroni penguins are at the northerly limit of their global range. It is the most numerous penguin species in the world, but only a tiny proportion come to the Islands to breed, where they nest within Rockhopper penguin colonies (at 19 sites in the 2005 census). More than 80% of these are on the eastern coasts of the Falklands, closest to South Georgia which holds the majority of the global population (2.7 million pairs). They are likely to be susceptible to environmental change as the Rockhopper penguin. Macaroni penguins are noted in the Falkland Islands for breeding with Southern Rockhoppers and producing hybrid offspring.
Magellanic Penguin The Falklands hold an estimated 10% of the world population of this species, which is widely distributed around the extensive coastline of the archipelago. Magellanics are burrowing penguins and particularly 'shy'. No island wide census has been conducted of this species due to its extensive breeding range and burrowing nature which makes it difficult to survey. It is also found all around the coasts of southern South America. There are concerns that accidental oil spills, discharge of waste by vessels offshore and along the South American coast, disturbance when nesting and shortage of food in some years are causing a decline in South Atlantic numbers, however this is currently unverified in the Falkland Islands. |
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