Abstract

CERROS-CORNELIO, Juan Carlos et al. Composition of the family Fissurellidae (Mollusca: Gastropoda) in the rocky intertidal zone of priority marine regions in Guerrero, Mexico. CienciaUAT [online]. 2017, vol.12, n.1, pp.6-22. ISSN 2007-7858.

Information dealing with different ecological aspects of gastropod mollusks in Mexico is insufficient, especially in marine priority regions (MPRs) that have been determined by the National Commission for Knowledge and Use of Biodiversity. In the state of Guerrero there are four MPRs. The aim of this research was to determine the richness, abundance, distribution, size composition and abundance and length relationship of the dominant species of the Fissurellidae family with the type of substrate and wave intensity (Mollusca: Gastropoda), which has been reported as representative family in the rocky intertidal zone in Guerrero. The work was carried out at 23 sites in the rocky intertidal zone. The specimens were collected at low tide and the sampling unit was 1 m2. The sampled area by site and collection was 10 m2. The specimens found within the sampling unit, were collected and preserved in 96 % alcohol. 1 669 specimens were analyzed; 14 species were identified. Fissurella morrisoni is reported as a new adhesion to the list of species of this family in Guerrero. Fissurella nigrocincta has the highest abundance with 1 043 agencies. It was determined that Fissurella. nigrocincta and Fissurella gemmata as species with wide distribution to be present in 90 % of sites. Fissurella gemmata has the greatest length in shell. The species with the greatest abundance and lengths have preferences for a substrate composed of rock masses and large blocks, where wave intensity is high.

Keywords : Fissurellidae; Guerrero; species richness; distribution; intertidal zone.

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