Τίτλος:
Diel variations in Acartia tonsa feeding, respiration and egg production in a mediterranean coastal lagoon
Γλώσσες Τεκμηρίου:
Αγγλικά
Περίληψη:
Short-term changes in abundance, feeding, respiration and spawning by the copepod Acartia tonsa were studied during four 24 h periods at two stations in a Mediterranean lagoon in May and June of 1989 and 1990. Nightly increases of abundance in the upper layer, attributed to nocturnal upward migration, were observed in three out of the four time series. Nevertheless, occasional daily increases were observed too, so that no clear diel patterns in abundance could be defined. Contrarily, diel patterns seemed to appear: (i) for feeding (higher at the beginning of the night), based on gut fluorescence and clearance and ingestion rate measurements; (ii) for respiration (lower at night and based on 8 h incubation periods); and (iii) for spawning (higher at the end of the night, based on experimental data). The origin of these patterns, as well as their relationships to environmental data and their possible association, are discussed with regard to the available literature. © 1993 Oxford University Press.
Συγγραφείς:
Cervetto, G.
Gaudy, R.
Pagano, M.
Saint-jean, L.
Verriopoulos, G.
Arfi, R.
Leveau, M.
Περιοδικό:
Journal of Plankton Research
Λέξεις-κλειδιά:
diel variations; egg production; feeding; feeding behaviour; lagoon; lagoon ecosystem; respiration; vertical migration, France, Midi, Acartia tonsa
DOI:
10.1093/plankt/15.11.1207
