Circannual changes in the duration of the immobility response of rats in the forced swim test

Physiology & Behavior
E L Abel

Abstract

Separate groups of male rats were tested in the forced swim test on the third Tuesday of each mo for 14 mo. A distinct pattern was observable in their immobility response such that animals were most immobile during the winter months (Dec-Mar) and least immobile during the summer months (June-Sept). Bicarbonate-carbon dioxide levels were significantly correlated with immobility times (r = 0.48), as were glucose (r = 0.34) and phosphorus (r = -0.33) levels, whereas corticosterone and testosterone levels were not significantly correlated with immobility. These results indicate that there is a circannual rhythm in the floating behavior of rats in the forced swim test.

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Citations

Jan 12, 1999·Neuroscience and Biobehavioral Reviews·H M Barros, M Ferigolo
Jan 15, 2013·Journal of Pharmacological and Toxicological Methods·B BertA Rex
Sep 22, 2001·Brain, Behavior, and Immunity·M DimitrijevićJ Radulović
Jun 19, 2013·Physiology & Behavior·Sherry A Ferguson, Kaitlyn L Maier
May 21, 2013·Physiology & Behavior·Olena V BogdanovaPerry F Renshaw
Jul 24, 2002·BMC Physiology·M Benjamin Shoemaker, Paul D Heideman
Jul 1, 2008·Neurotoxicology and Teratology·Plinio das N FavaroEstefânia G Moreira
Oct 30, 2004·The International Journal of Neuroscience·A AksoyR Canbeyli
Feb 1, 2005·Neurotoxicology and Teratology·Lynne S Hansen-Trench, Susan Barron
Dec 9, 2003·Stress : the International Journal on the Biology of Stress·C BielajewG Fouriezos
Oct 14, 2011·Stress : the International Journal on the Biology of Stress·R NirupamaH N Yajurvedi
Apr 24, 2021·Progress in Neuro-psychopharmacology & Biological Psychiatry·Kadi T NguyenJon D Reuter

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