Advanced

Relaxed circadian rhythm in zooplankton along a latitudinal gradient

Hansson, Lars-Anders LU ; Becares, E; Fernandez-Alaez, M; Fernandez-Alaez, C; Kairesalo, T; Miracle, MR; Romo, S; Stephen, D; Vakkilainen, K and van de Bund, W, et al. (2007) In Oikos 116(4). p.585-591
Abstract
To test whether aquatic invertebrates are able to adjust their diel migratory cycle to different day length and presence of predators, we performed standardized enclosure experiments in shallow lakes at four different latitudes from southern Spain, with strong night-day cycles, to Finland where daylight is almost continuous during summer. We show here that nearly continuous daylight at high latitudes causes a relaxation in diel migratory behaviour in zooplankton irrespective of predation risk. At lower latitudes, however, similar conditions lead to pronounced diel rhythms in migration. Hence, zooplankton may show local behavioural adaptations in their circadian rhythm. They are also able to make risk assessments as to whether diel... (More)
To test whether aquatic invertebrates are able to adjust their diel migratory cycle to different day length and presence of predators, we performed standardized enclosure experiments in shallow lakes at four different latitudes from southern Spain, with strong night-day cycles, to Finland where daylight is almost continuous during summer. We show here that nearly continuous daylight at high latitudes causes a relaxation in diel migratory behaviour in zooplankton irrespective of predation risk. At lower latitudes, however, similar conditions lead to pronounced diel rhythms in migration. Hence, zooplankton may show local behavioural adaptations in their circadian rhythm. They are also able to make risk assessments as to whether diel migration is beneficial or not, manifested in a lack of diel migration at near constant daylight, irrespective of predator presence. Our results provide an additional explanation to previous knowledge regarding diel migrations among aquatic invertebrates by showing that both physical (light) and biological (predation) factors may affect the migratory behaviour. (Less)
Please use this url to cite or link to this publication:
author
, et al. (More)
(Less)
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Oikos
volume
116
issue
4
pages
585 - 591
publisher
Wiley-Blackwell
external identifiers
  • wos:000245313500005
  • scopus:34047097396
ISSN
1600-0706
DOI
10.1111/j.2006.0030-1299.15754.x
language
English
LU publication?
yes
id
b9ac5e64-3d17-48d2-bc08-6db9ddf7cf24 (old id 168586)
date added to LUP
2007-06-28 10:37:04
date last changed
2017-09-24 03:36:24
@article{b9ac5e64-3d17-48d2-bc08-6db9ddf7cf24,
  abstract     = {To test whether aquatic invertebrates are able to adjust their diel migratory cycle to different day length and presence of predators, we performed standardized enclosure experiments in shallow lakes at four different latitudes from southern Spain, with strong night-day cycles, to Finland where daylight is almost continuous during summer. We show here that nearly continuous daylight at high latitudes causes a relaxation in diel migratory behaviour in zooplankton irrespective of predation risk. At lower latitudes, however, similar conditions lead to pronounced diel rhythms in migration. Hence, zooplankton may show local behavioural adaptations in their circadian rhythm. They are also able to make risk assessments as to whether diel migration is beneficial or not, manifested in a lack of diel migration at near constant daylight, irrespective of predator presence. Our results provide an additional explanation to previous knowledge regarding diel migrations among aquatic invertebrates by showing that both physical (light) and biological (predation) factors may affect the migratory behaviour.},
  author       = {Hansson, Lars-Anders and Becares, E and Fernandez-Alaez, M and Fernandez-Alaez, C and Kairesalo, T and Miracle, MR and Romo, S and Stephen, D and Vakkilainen, K and van de Bund, W and van Donk, E and Balayla, D and Moss, B},
  issn         = {1600-0706},
  language     = {eng},
  number       = {4},
  pages        = {585--591},
  publisher    = {Wiley-Blackwell},
  series       = {Oikos},
  title        = {Relaxed circadian rhythm in zooplankton along a latitudinal gradient},
  url          = {http://dx.doi.org/10.1111/j.2006.0030-1299.15754.x},
  volume       = {116},
  year         = {2007},
}