Analysis of Ecological Data : Exploratory and Euclidean Methods in Environmental Sciences

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This data set gives informations between a faunistic array, the total number of sampling points made at each sampling occasion and the year of the sampling occasion.

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`ichtyo`

is a list of 3 components.

- tab
is a faunistic array with 9 columns and 32 rows.

- eff
is a vector of the 32 sampling effort.

- dat
is a factor where the levels are the 10 years of the sampling occasion.

The value *n(i,j)* at the *ith* row and the *jth* column in `tab`

corresponds
to the number of sampling points of the *ith* sampling occasion (in `eff`

) that contains the *jth* species.

Dolédec, S., Chessel, D. and Olivier, J. M. (1995)
L'analyse des correspondances décentrée: application aux peuplements ichtyologiques du haut-Rhône.
*Bulletin Français de la Pêche et de la Pisciculture*, **336**, 29–40.

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