nieuwe zoekopdracht
[ meld een fout in dit record ]mandje (0): toevoegen | toon Print deze pagina

A large population of king crabs in Palmer Deep on the west Antarctic Peninsula shelf and potential invasive impacts
Smith, C.R.; Grange, L.J.; Honig, D.L.; Naudts, L.; Huber, B.; Guidi, L.; Domack, E. (2011). A large population of king crabs in Palmer Deep on the west Antarctic Peninsula shelf and potential invasive impacts. Proc. - Royal Soc., Biol. Sci. 279(1730): 1017-1026.
In: Proceedings of the Royal Society of London. Series B. The Royal Society: London. ISSN 0962-8452; e-ISSN 1471-2954, meer
Peer reviewed article  

Beschikbaar in  Auteurs 

    Organisms > Invasive species
    Neolithodes A. Milne-Edwards & Bouvier, 1894 [WoRMS]; Neolithodes yaldwyni Ahyong & Dawson, 2006 [WoRMS]
    PS, Antarctica [Marine Regions]
Author keywords
    Neolithodes yaldwyni Ahyong & Dawson

Auteurs  Top 
  • Smith, C.R.
  • Grange, L.J.
  • Honig, D.L.
  • Naudts, L.
  • Huber, B.
  • Guidi, L.
  • Domack, E.

    Lithodid crabs (and other skeleton-crushing predators) may have been excluded from cold Antarctic continental shelf waters for more than 14 Myr. The west Antarctic Peninsula shelf is warming rapidly and has been hypothesized to be soon invaded by lithodids. A remotely operated vehicle survey in Palmer Deep, a basin 120 km onto the Antarctic shelf, revealed a large, reproductive population of lithodids, providing the first evidence that king crabs have crossed the Antarctic shelf. DNA sequencing and morphology indicate the lithodid is Neolithodes yaldwyni Ahyong & Dawson, previously reported only from Ross Sea waters. We estimate a N. yaldwyni population density of 10 600 km-2 and a population size of 1.55 × 106 in Palmer Deep, a density similar to lithodid populations of commercial interest around Alaska and South Georgia. The lithodid occurred at depths of more than 850 m and temperatures of more than 1.4°C in Palmer Deep, and was not found in extensive surveys of the colder shelf at depths of 430–725 m. Where N. yaldwyni occurred, crab traces were abundant, megafaunal diversity reduced and echinoderms absent, suggesting that the crabs have major ecological impacts. Antarctic Peninsula shelf waters are warming at approximately 0.01°C yr-1; if N. yaldwyni is currently limited by cold temperatures, it could spread up onto the shelf (400–600 m depths) within 1–2 decades. The Palmer Deep N. yaldwyni population provides an important model for the potential invasive impacts of crushing predators on vulnerable Antarctic shelf ecosystems.

Alle informatie in het Integrated Marine Information System (IMIS) valt onder het VLIZ Privacy beleid Top | Auteurs 
IMIS is ontwikkeld en wordt gehost door het VLIZ, voor meer informatie contacteer .