Riqueza, composición y diversidad de la comunidad de moluscos asociada al sustrato rocoso intermareal de playa Parque de la Reina, Acapulco, México

Abstract

Riqueza, composición y diversidad de la comunidad de moluscos asociada al sustrato rocoso intermareal de playa Parque de la Reina, Acapulco, México Abstract.-The information available about marine biodiversity in the State of Guerrero, Mexico, is scarce as designated by the National Commission for the Conservation and Use of Biodiversity. To gain on this issue, this work was carried on at the rocky intertidal zone of Parque de la Reina beach, Acapulco, which is located in the Priority Region for Marine Conservation and Biodiversity Use Number 32. The objective was to establish the mollusks species richness, community structure, determine the density and degree of species occurrence, composition by size and diversity. The sampling area was 10 m -2 and the sampling unit was 1 m -2 . Fifty eight species were identified, with 4 new records for the intertidal rocky shores of Acapulco. The best represented families were: Muricidae, Ischnochitonidae, and Mytilidae. The observed density was of 207.55 m -2 . Twenty one species were rated as dominant. Macrocypraea cervinetta had the highest size. The mollusks richness was high, as is expected in the tropics. The constant and dominant species accounted for 55.16% of the total, and considered as representative of the community. The density found was higher than has been previously reported for the State of Guerrero; the type of substrate is one of the determining factors defining species richness and abundance. Key words: Check list, degree of occurrence, dominance, size and recordsResumen.-El conocimiento de la biodiversidad marina en el Estado de Guerrero, México es escaso, lo que es señalado por la Comisión Nacional para la Conservación y Uso de la Biodiversidad. Para avanzar en este conocimiento, se trabajó en el intermareal rocoso de Playa Parque de la Reina, Acapulco, que se encuentra ubicada en la región marina prioritaria para la conservación y uso de la biodiversidad número 32. El objetivo fue determinar la riqueza de especies de moluscos, conocer la composición de la comunidad, la densidad, el grado de aparición de las especies, la composición por tallas y la diversidad. El área de muestreo fue de 10 m -2 y la unidad de muestreo fue 1 m -2 . Se identificaron 58 especies, 4 nuevos registros para el intermareal rocoso de Acapulco. Las familias más representadas fueron: Muricidae, Ischnochitonidae, y Mytilidae. La densidad fue de 207,55 organismos m -2 . Fueron dominantes 21 especies. Macrocypraea cervinetta presentó la mayor talla. La riqueza de moluscos fue alta, coincidiendo con lo esperado en una zona tropical. Las especies dominantes y constantes representaron el 55,16%, y se consideran representativas de la comunidad. La densidad encontrada es la más alta que se ha reportado para Guerrero, México y el tipo de sustrato es uno de los factores determinantes que define la riqueza de especies y la abundancia.

Diversity, Distribution and Composition of the Bivalvia Class on the Rocky Intertidal Zone of Marine Priority Region 32, Mexico

“…In this research, S. prismática recorded the greatest size; however C. coralloides is recorded having the greatest length among the species. B. adamsianus has been reported as the smallest species in the MPR 32 [33] [34], also L. (M) aristata [32]. This research also found these species as among those with the smallest recorded length.…”

“…The values of diversity and equity for mollusks, which have been reported by other research conducted at sites that are located in the MPR 32 [33] [34] are high. We also found high values, which correspond to a tropical area.…”

“…In reports regarding Acapulco, [31] recorded 11 species of the Class Bivalvia; [30] recorded 13 bivalves; [32] reported nine species; [33], eight species and [34] recorded 21 species. Our findings agree with those of the authors mentioned above regarding all species, except the report on Pseudochama inermis (Dall, 1871).…”

Structure of molluscan communities in shallow subtidal rocky bottoms of Acapulco, Mexico

“…In the particular case of the rocky coast of Guerrero, Mexico, most studies of mollusks have been conducted in the intertidal zone Torreblanca-Ramírez et al, 2012Cerros-Cornelio et al, 2017). Given the importance of mollusks in the Mexican Pacific, the objectives of this study are: i) to determine the composition of the species, relative frequency of occurrence, relative abundance, and ecological attributes of the subtidal mollusks of different rocky coastal bottoms of Acapulco, Guerrero; ii) to compare the presence of rocky intertidal species with subtidal rocky species in this area of study and determine the species of economic importance in this environment; iii) and to determine the affinity of the taxocenosis of mollusks in the subtidal environment of Acapulco, Guerrero.…”

New Records for GASTROPODA Class of Species Found in the Rocky Intertidal Zone of the Marine Priority Region 32, Guerrero, Mexico

“…In particular for the coasts of Guerrero where there are reports of the class GASTROPODA analyzed as part of the set of classes studied, among which are those of [25]- [37], however, the class GASTROPODA in the coast of Guerrero, there are still many outstanding issues, regarding the knowledge of biodiversity. It is important to have an inventory of species, to study communities and composition, and to manage and maintain biodiversity of highly diverse regions such as the state of Guerrero in rational and responsible manner.…”