IMIS | Flanders Marine Institute

Flanders Marine Institute

Platform for marine research


Publications | Institutes | Persons | Datasets | Projects | Maps
[ report an error in this record ]basket (0): add | show Printer-friendly version

Heart rate as a measure of stress in Antarctic krill, Euphausia superba
Ritz, D.A.; Swadling, K.M.; Cromer, L.; Nicol, S.; Osborn, J. (2003). Heart rate as a measure of stress in Antarctic krill, Euphausia superba. J. Mar. Biol. Ass. U.K. 83(2): 329-330
In: Journal of the Marine Biological Association of the United Kingdom. Cambridge University Press/Marine Biological Association of the United Kingdom: Cambridge. ISSN 0025-3154, more
Peer reviewed article  

Available in  Authors 

    Heart; Marine crustaceans; Stress-strain relations; Euphausia superba Dana, 1850 [WoRMS]; Marine

Authors  Top 
  • Ritz, D.A.
  • Swadling, K.M.
  • Cromer, L.
  • Nicol, S.
  • Osborn, J.

    Antarctic krill, Euphausia superba, normally live in social aggregations (schools) but rarely aggregate in laboratory tanks. In order to study the effect of stress on solitary living we tethered krill to wooden skewers and measured heart rate both when they were held isolated from conspecifics and when they were held at normal schooling distances (~1 body length). Heart rate did not differ significantly with sex or body size. However, intermoult krill had a significantly lower heart rate than postmoult animals. When two individuals were held at schooling distance, with one slightly higher in the water column than the other, the heart rate of the higher individual slowed significantly (106-98 beats min-1), while that of the lower individual remained the same. We interpret these results to mean that krill living solitarily are stressed but will respond to neighbouring individuals by decreasing their metabolic rate and saving energy.

All data in IMIS is subject to the VLIZ privacy policy Top | Authors