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The effects of temperature on the behaviour of the Antarctic sea star Odontaster validus

Kidawa, Anna and Potocka, Marta and Janecki, Tomasz (2010) The effects of temperature on the behaviour of the Antarctic sea star Odontaster validus. Polish Polar Research, 31 (3). pp. 273-284. ISSN 0138-0338


Official URL: http://journals.pan.pl/dlibra/publication/124121/e...


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 5C) 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. validusto 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 5C a loss of motor coordination was ob− served, although at all tested temperatures up to 5C there were single individuals perform− ing successfully.

Item Type:Article
Subjects:Q Science > QL Zoology
Divisions:Department of Antarctic Biology
ID Code:1645
Deposited By: Marta Potocka
Deposited On:30 Nov 2018 09:29
Last Modified:30 Nov 2018 09:29

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