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Seasonal variation in the free-running period in two Talitrus saltator populations from Italian beaches differing in morphodynamics and human disturbance
- Source :
-
Estuarine Coastal & Shelf Science . Oct2003 Supplement 1, Vol. 58, p199. 8p. - Publication Year :
- 2003
-
Abstract
- The sandhopper Talitrus saltator Montagu (Amphipoda) is a widespread species adapted to different changing environmental conditions and which typically shows a clear circadian rhythm of locomotor activity. The populations from two beaches on the western Italian coast differing in coastline dynamics (eroded versus dynamically stable) and human disturbance (inside a natural park versus freely used and cleaned for leisure) were studied to highlight intrapopulation variation in the endogenous locomotor rhythm. The activity of adult sandhoppers was studied under constant laboratory conditions within individual recording chambers. Variation of the free-running period was analysed at individual level within each population. Greater variability was found than previously reported for the circadian rhythm period of T. saltator, and seasonal variation was shown for the first time. Differences in the level of variation were correlated with coastline dynamics. [Copyright &y& Elsevier]
- Subjects :
- *AMPHIPODA
*CIRCADIAN rhythms
*MUSCULOSKELETAL system
Subjects
Details
- Language :
- English
- ISSN :
- 02727714
- Volume :
- 58
- Database :
- Academic Search Index
- Journal :
- Estuarine Coastal & Shelf Science
- Publication Type :
- Academic Journal
- Accession number :
- 11258741
- Full Text :
- https://doi.org/10.1016/S0272-7714(03)00034-9