TY - JOUR N2 - Many Antarctic marine benthic invertebrates are adapted to specific environ− mental conditions (e.g. low stable temperatures, high salinity and oxygen content). Changes caused by global climatic shifts can be expected to have significant impact on their physiol− ogy and distribution. Odontaster validus, an ubiquitous, omnivorous sea star is one of the “keystone species” in the Antarctic benthic communities. Laboratory experiments were car− ried out to study the effect of temperature rise (from 0 to 5°C) on some vital biological func− tions that sea stars must perform in order to survive in their environment. Parameters such as behavioural reaction of sea stars to food and food odour, locomotory performance and abil− ity to right were measured. Temperature increase significantly impaired the ability of O. validus to perform these functions (e.g. lowering the number of sea stars able to right, in− creasing time−to−right, reducing locomotory activity, weakening chemosensory reaction to food and food odour). At temperatures of 4 and 5°C a loss of motor coordination was ob− served, although at all tested temperatures up to 5°C there were single individuals perform− ing successfully. L1 - http://www.journals.pan.pl/Content/108303/PDF-MASTER/article-p273.pdf L2 - http://www.journals.pan.pl/Content/108303 PY - 2010 IS - No 3 EP - 284 KW - Antarctica KW - asteroid KW - temperature KW - stress KW - behaviour A1 - Janecki, Tomasz A1 - Kidawa, Anna A1 - Potocka, Marta PB - Polish Academy of Sciences PB - Committee on Polar Research DA - 2010 T1 - The effects of temperature on the behaviour of the Antarctic sea star Odontaster validus SP - 273 UR - http://www.journals.pan.pl/dlibra/publication/edition/108303 T2 - Polish Polar Research ER -