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Hidrobiológica
Print version ISSN 0188-8897
Abstract
GARCIA-IBANEZ, Sergio; FLORES-GARZA, Rafael; FLORES-RODRIGUEZ, Pedro and VALDES-GONZALEZ, Arcadio. Density and sizes of Plicopurpura patula pansa related with substratum and shock wave action in the rocky shore at Guerrero, México. Hidrobiológica [online]. 2004, vol.14, n.2, pp.127-136. ISSN 0188-8897.
The relationship was analyzed between the density and sizes average of the snail Plicopurpura patula pansa with the shock wave and substratum type in nine rocky beaches of Guerrero State, Mexico. The relative density was 4.7 snails/m2 and the size average 21.7 mm. The correlation between density and sizes average it was negative. The one-way analysis of variance found significant differences in the sizes average of the snail among the study places. The multiple comparisons established three groups that were integrated for beaches that presented similarity in certain characteristics of the substratum and shock wave action. A hierarchical analysis formed eight groups. The most similar groups were integrated by beaches that presented similar characteristics in the substratum type, but not in shock wave action. The density obtained by this study is the biggest to those registered in other States of the Mexican Pacific. The substratum type presented the greater association with densities and sizes average of P. p pansa.
Keywords : Density; sizes; Plicopurpura; rocky shore.