Data related to Antarctic krill activity monitoring studies conducted in the Southern Ocean and South Atlantic during the Discovery 2010 cruise (JR177), 2007-2008. The activity monitor is a purpose-built apparatus for the observation of vertical migration patterns. Lighting within the apparatus is adjusted to that experienced by the krill at normal daytime depths and the temperature in the cool-room kept at the level of the seawater supply. The movements of the krill over a 10-day period were recorded - 5 days recording their vertical migration patterns under normal lighting conditions followed by 5 days in total darkness to see whether the activity pattern is maintained, indicating control by an endogenous circadian rhythm. Three runs were carried out, using animals from 60.44 S, 59.66 S and 52.75 S.
Behaviour in many organisms (including krill) is strongly influenced by diurnal and seasonal changes in the environment. The evolution of circadian clocks has afforded organisms regulation of molecular and physiological rhythms, which in turn affect the animals' rhythmic behaviour.
Euphausia, Southern Ocean, animal behaviour, krill, vertical migration
|ISO Topic Categories:||
Goodall-Copestake WP, Pérez-Espona S, Clark MS, Murphy EJ, Seear PJ, Tarling GA (2010) Swarms of diversity at the gene cox1 in Antarctic krill. Heredity, 104: 513-518.
Seear PJ, Tarling GA, Burns G, Goodall-Copestake WP, Gaten E, Özkaya Ö, Rosato E (2010). Differential gene expression during the moult cycle of Antarctic krill (Euphausia superba) BMC Genomics, 11: 582.
Seear P J, Tarling GA, Teschke M, Meyer B, Thorne MAS , Clark MS, Gaten E, Rosato E (2009) Effects of simulated light regimes on gene expression in Antarctic krill (Euphausia superba Dana) Journal of Experimental Marine Biology and Ecology, 381: 57-64.
Gaten T, Tarling G, Dowse H, Kyriacou CP, Rosato E (2008) Is vertical migration in Antarctic krill (Euphausia superba) influenced by an underlying circadian rhythm? Journal of Genetics, 87: 473-483.
Conference proceedings and seminars:
Ozkaya O, Gaten E,. Kyriacou CP, Tarling G, Rosato E. Rhythmic behaviour in Antarctic krill: a role for the clock? Poster presentation - SRBR, Sandestin, Florida (USA), 22-26 May 2010. p125 .
Ozkaya O, Seear P, Gaten E, Tarling G, Kyriacou CP, Rosato E. Gene function in Antartict krill: Determining the role of clock-genes in synchronised behavioural patterns. 9th Antartic Funding Initiative workshop, New Hall, Cambridge, 13-14 September 2010.
Rosato E. Delayed coupling and feedback in the circadian network. Slide presentation Lorentz Centre workshop - Assembling a multi-cellular circadian pacemaker- August 16-20 2010, Leiden, The Netherlands.
Ozkaya O. From flies to krill, reverse genetics to characterise a polar clock. Genome Science Research Theme Day, Leicester University, April 2010.
Ozkaya O, Rosato E. The molecular basis of circadian rhythms in Antarctic krill. Australian Antarctic Division, Hobart, Australia, 25 February 2010.
Ozkaya O, Seear P, Gaten E, Tarling G, Kyriacou CP, Rosato E. Gene function in Antartict krill: Determining the role of clock-genes in synchronised behavioural patterns. 8th Antartic Funding Initiative workshop, New Hall, Cambridge, 21-22 September 2009.
Ozkaya O, Seear P, Gaten E, Tarling G, Kyriacou CP, Rosato E. Gene function in Antarctic krill: determining the role of clock-genes in synchronised behavioural patterns. 7th Antarctic Funding Initiative Workshop. New Hall, University of Cambridge, September 2008.
Rosato E, Kyriacou CP. The role of natural selection in circadian behaviour: a molecular genetic approach. Essays in Biochemistry, Chronobiology volume (Editor: H Piggins), 49(1):71-85, 2011, Portland Press Limited, London, UK.
Tarling GA. Preface. Advances in Marine Biology, The Biology of Northern krill volume (Editor G Tarling); 57:xvii-xix, 2010 , Academic Press, London, UK.
Tarling GA, Ensor NS, Fregin T, Goodall-Copestake WP, Fretwell P. An introduction to the biology of Northern krill (Meganyctiphanes norvegica Sars). Advances in Marine Biology, The Biology of Northern krill volume (Editor G Tarling);57:1-40, 2010, Academic Press, London, UK.
Tarling GA. Population dynamics of Northern krill (Meganyctiphanes norvegica Sars). Advances in Marine Biology, The Biology of Northern krill volume (Editor G Tarling);57:59-90, 2010, Academic Press, London, UK
AFI 7/06 field report (BAS Archives)
AFI 7/06: Gene function in Antarctic krill: determining the role of clock-genes in synchronised behavioural patterns
|Quality:||The planned video analysis of vertical migrations was not possible and so the study was based on direct observation and was of a more limited nature than originally planned.|
|URL Content Type||ASSOCIATED DATA SET(S)|
|URL Content Type||ASSOCIATED DATA SET(S)|
|URL Content Type||RELATED DATA SET DESCRIPTION|
|Detailed Location||Near South Orkney Islands|
|Location||South Atlantic Ocean|
|Detailed Location||North-West of South Georgia|
|Data Collection:||Three runs were carried out on the Discovery 2010 summer cruise (JR177), using animals from nets 56 (60.44S), 154 (59.66S) and 275 (52.75S). The first two runs consisted of 5 days light/dark (dawn = 03.00, dusk = 21.30), followed by 2 days of complete darkness. The third run consisted of 5 days light/dark (dawn = 04.00, dusk = 20.00), followed by 5 days of complete darkness. The effectiveness of the monitor for assessing copepod activity was investigated over a 2-day period under a light/dark cycle, (using Rhincalanus gigas specimens). All of the resulting Spike2 traces were saved for later periodogram analysis.|
|Data Storage:||These data are managed by University of Leicester|
|Access Constraints:||These data are governed by the NERC data policy|