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| Bernard, O; Sciandra, A; Sallet, G. |
| New techniques - called software sensors - issued from the non-linear automatic control field and initially developed for non-linear chemical systems have been applied to a continuous culture of phytoplankton. A software sensor (or 'observer') combines an analytical differential equation based model and partial measurements of the system in order to estimate the non-measured state variables. It filters data and estimates the actual state of living systems, models of which are often rough approximations. The efficiency of this approach is illustrated with a nitrate-limited chemostat experiment with the chlorophyceae Dunaliella tertiolecta performed in a computer controlled fluctuating environment. (C) 2001 Ifremer/CNRS/IRD/Editions scientifiques et... |
| Tipo: Text |
Palavras-chave: Modèle de Droop; Systèmes non linéaires; Observateurs; Phytoplancton; Droop model; Non-linear systems; Observers; Phytoplankton. |
| Ano: 2001 |
URL: http://archimer.ifremer.fr/doc/00322/43340/42888.pdf |
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| Garciarena, A.D.. |
| Data obtained by observers on board of two fishing vessels during six trips carried out between January-April 2010 to catch tuna were analyzed. Thirty-four fishing days were completed and of the 59 trawls performed 37 turned out positive (with tuna catches). The fishing gear consisted of a purse seine net. Exploitation took place within the Argentine-Uruguayan Common Fishing Zone, between 36° S-39° S. The main landings occurred in March and consisted of slender tuna, Allothunnus fallai (57%), followed by albacore, Thunnus alalunga (28.5%), in January and bonito, Sarda sarda (14%), in April. Sea surface temperature ranged 16 °C-19 °C. A total of 25 length frequency samples allowed to measure individuals of the species above mentioned and those of skipjack... |
| Tipo: Journal Contribution |
Palavras-chave: Tuna fisheries; Catch statistics; Commercial fishing; Allothunnus fallai; Thunnus alalunga; Sarda sarda; Observers; Marine environment. |
| Ano: 2011 |
URL: http://hdl.handle.net/1834/4882 |
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