TY - JOUR T1 - Application of a digital pattern recognition system to Dinophysis acuminata and D-sacculus complexes A1 - Truquet,Philippe A1 - Lassus,Patrick A1 - Honsell,Giorgio A1 - Le Dean,Loic AD - IFREMER Centre de Nantes, BP 1105, 44311 Nantes Cedex 03, France AD - Universita degli Studi di Trieste, Via A. Valerio 32/34, 34127 Trieste, Italy AD - IFREMER, Centre Océanologique du Pacifique, BP 7004, Taravao, Tahiti, French Polynesia UR - https://archimer.ifremer.fr/doc/00188/29890/ DO - 10.1051/alr:1996031 KW - Dinophysis sp. KW - analyse d'image KW - taxonomie KW - phytoplancton KW - Dinophysis sp KW - image analysis KW - taxonomy KW - phytoplankton N2 - An image discrimination technique was developed to improve specific identification of some toxic Dinophysis cells (marine dinoflagellates involved in diarrhoeic shellfish poisoning), especially the ''acuminata'' and ''sacculus'' groups, which can be present at different ratios in natural sea-water samples collected during toxic episodes. This work was performed with image analysis software SAMBA (TITN Alcatel) using preserved cells directly observed through an inverted microscope and recorded with a video camera before further processing. All morphometric parameters used for discrimination of 7 different species or morphotypes of Dinophysis were tested with discriminant analysis. This study indicates that Dinophysis sp. and D. pavillardi seem well classified at the species level, whereas D. cf. acuminata and D. sacculus appear to be morphotypes of D. acuminata. Y1 - 1996 PB - Edp Sciences S A JF - Aquatic Living Resources SN - 0990-7440 VL - 9 IS - 3 SP - 273 EP - 279 ID - 29890 ER -