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An update on the Southern Giant Petrels Macronectes giganteus breeding at Harmony Point, Nelson Island, Maritime Antarctic Peninsula

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Abstract

In several parts of Antarctica, the information on the size of seabird populations is outdated by decades. Considering the environmental changes taking place at the Antarctic Peninsula, up-to-date information is urgently required. In this study, the breeding population of southern giant petrel (Macronectes giganteus) at Harmony Point, Nelson Island, was counted and mapped during incubation. The total number of active nests was 481, distributed mostly in small dispersed groups (< 30 nests); one single colony presented > 100 nests. Nests were distributed throughout the whole area. Current colony distribution was similar to the ones reported previously. The current number of nests is similar to those reported since 2005, and also for early counts in the 1965 and 1989s. However, current numbers were almost half of those counted in the 1997. The apparent increases in the number of southern giant petrels by 1997 was attributed to prohibiting tourism visits to the area (giant petrels are sensitive to human disturbance), but causes of the following decrease are unknown. This highlights the need for updated information in order to understand which factors are responsible for trends in Antarctic seabird populations.

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Fig. 1
Fig. 2

Silva et al. (1998)

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Acknowledgements

I thank the logistic and expedition teams of the Chilean Antarctic Institute (INACH) and the Norwegian Polar Institute for field support (particularly Andrew Lowther). I thank Fondecyt for the project funding (Fondecyt Iniciación 11180175). My many thanks for Chris Oosthuizen and William Jouaenneau for being such good fieldwork colleagues and having the patience to wait for me to count the Giant Petrels while conducting the penguin studies. Finally, thanks for Petra Quillfeldt and an anonymous reviewer by many useful comments and suggestions.

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  1. Instituto Antártico Chileno, Plaza Muñoz Gamero, 1055, Punta Arenas, Chile

    Lucas Krüger

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Correspondence to Lucas Krüger.

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Krüger, L. An update on the Southern Giant Petrels Macronectes giganteus breeding at Harmony Point, Nelson Island, Maritime Antarctic Peninsula. Polar Biol 42, 1205–1208 (2019). https://doi.org/10.1007/s00300-019-02504-5

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