Daily activity rhythms in temperate coastal fishes: insights from cabled observatory video monitoring
Visualitza/Obre
Cita com:
hdl:2117/20881
Tipus de documentArticle
Data publicació2013-07-12
Condicions d'accésAccés obert
Llevat que s'hi indiqui el contrari, els
continguts d'aquesta obra estan subjectes a la llicència de Creative Commons
:
Reconeixement-NoComercial-SenseObraDerivada 3.0 Espanya
Abstract
The rhythmic behavior of marine species generates uncertainties in population and
biodiversity assessments if the frequency of sampling is too low and irregular over time. Few
attempts have been made to link community changes to the rhythmic behavior of individuals
within populations. Cabled video observatories can be used to explore community changes over
different temporal windows as a result of the activity rhythms of individuals within populations. In
this study, we used, for the first time, a coastal cabled observatory (OBSEA) to video monitor activity
rhythms of different fish species within an artificial reef area at a high frequency. During 1 mo,
30 min daily count patterns were continuously measured and compared with the corresponding
solar irradiance. A significant (p < 0.05) day-night patterning was observed in the majority of recognized
taxa by Chi-Square periodogram analysis. Three types of rhythms were identified in
waveform plotting: (1) diurnal (Chromis chromis, Coris julis, Diplodus annularis, D. cervinus, D.
sargus, D. vulgaris, Serranus cabrilla, Dentex dentex, Symphodus sp.); (2) nocturnal (Atherina sp.
and Scorpaena sp.); and (3) crepuscular (Apogon imberbis, Oblada melanura, and Spicara maena).
Diurnal species clustered around maximum averaged irradiance (computed from a cosinor analysis).
The results were discussed evaluating whether visual count time series represent a reliable
proxy for the swimming activity rhythms of individuals and whether the complex habitat use of
coastal fishes would require the use of spatial networks of cameras.
CitacióAguzzi, J. [et al.]. Daily activity rhythms in temperate coastal fishes: insights from cabled observatory video monitoring. "Marine ecology. Progress series", 12 Juliol 2013, vol. 486, p. 223-236.
ISSN0171-8630
Versió de l'editorhttp://www.int-res.com/abstracts/meps/v486/p223-236/
Fitxers | Descripció | Mida | Format | Visualitza |
---|---|---|---|---|
Day-night rhythms at the OBSEA.pdf | 975,7Kb | Visualitza/Obre |