Density and size of structure of Nerita scabricosta (Mollusca: Neritidae) in the intertidal zone of islands of southeastern Gulf of California, Mexico

• Main Authors: Gutiérrez–Rubio, Yesenia, Arzola–González, Juan Francisco
• Format: Article in Journal/Newspaper
• Language: Spanish
• Published: Universidad del Zulia p-ISSN 0798-2259; e-ISSN 2521-9715; l-ISSN 2477-944X 2024
• Subjects: Abundance; size structure; Nerita scabricosta; islands; Gulf of California; Abundancia; estructura de tallas; islas; Golfo de California; Lucas Island
• Online Access: https://www.produccioncientificaluz.org/index.php/cientifica/article/view/42584; https://doi.org/10.52973/rcfcv-e34377

Currently in the northwest of Mexico there are no studies on the density and sizes of the snail Nerita scabricosta, which is classified as a potential resource. Density and size of N. scabricosta gastropod were recorded of intertidal of islands of the two bays (Mazatlan and Navachiste) of Sinaloa, Mexico. For each island the snaild were counted (50 m2) and 25 organisms were collected at random, the width Wi (mm) and weight W (g) were recorded. In Mazatlan bay, the highest density was Venados island (66.1 ind·m–2) and the lowest in Lobos (2.9 ind·m–2), the mean in Wi was 17.6±5.1 mm and in W 6.0±4.8 g. In Navachiste bay, the highest density was San Lucas island (2.7 ind·m–2) and the lowest El Metate (0.2 ind·m–2). The mean in Wi was 26.1±4.5 mm and in W was 14.8±6.2 g. The density of N. scabricosta was higher in islands of Mazatlan (P=0.017), but on average (sizes and weight), the snails of the Navachiste islands were higher (P=0.298). In addition, the relationship between Wi and W of N. scabricosta indicated positive isometric growth. Actualmente en el noroeste de México no existen estudios de densidad y tallas del caracol Nerita scabricosta, especie catalogada como un potencial recurso pesquero. Se analizó la densidad y tallas del gasterópodo N. scabricosta en la zona intermareal de ocho islas pertenecientes a las bahías de Mazatlán y Navachiste, Sinaloa, México. Por cada isla se contabilizaron los caracoles (50 m2) y se recolectaron al azar 25 organismos, se les registró la AN (mm) y PT (g). En la bahía de Mazatlán, la mayor densidad fue isla Venados (66,1 ind·m–2) y la menor en Lobos (2,9 ind·m–2), la media en AN fue 17,6 ± 5,1 mm y en PT 6,0 ± 4,8 g. En bahía Navachiste, la mayor densidad fue isla San Lucas (2,7 ind·m–2) y la menor El Metate (0,2 ind·m–2). La media en AN y PT, fue 26,1 ± 4,5 mm y 14,8 ± 6,2 g, respectivamente. La densidad de N. scabricosta fue mayor en islas de bahía Mazatlán (P=0,017), pero en promedio la talla y peso, fueron mayores en las islas de Navachiste (P=0,298). Además, la ...