Exemple de la contribution de l'analyse fsctorielle des correspondences pour suivre l'evolution de la structure d'une population piscicole
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This contribution demonstrates an application of correspondence analysis to length-frequency data of catfish (Ictalurus melas, lctaluridae) sampled by electrofishing in the Garonne River, near Toulouse, France. The available samples ranged from February 1988 to November 1990 and covered a total length range from 8 to 30 cm. The method applied allowed the identification of two groups of catfish, with those between 15 cm having a dynamics different from those above 15 cm. This is discussed with regard to the movements, vulnerability to the sampling gear, and individual growth of 1. melas at the sampling site.
Citation
Fishbyte 9(2): 55-57
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1991
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ICLARM