An updated checklist of the marine invasive amphipod species from Mexico is documented. This list includes 11 species, belonging to the suborders Gammaridea and Corophiidea, and grouped in five families and six genera. Information about distribution, habitat, natural history, and dispersal mechanisms was added, according to the Sistema Nacional de Información sobre Biodiversidad and Análisis de Riesgo. The species Ampelisca abdita, A.burkei, A. schellenbergi, Melita nitida, Colomastix irciniae, C. tridentata, Ampithoe longimana, A. pollex, Apocorophium acutum, Monocorophium acherusicum, and M. insidiosum, were characterized as marine invasive species from Mexico.

The objective of the current study is to understand population characteristics of the grass shrimp Palaemonetes pugio by describing growth, populatio

This study evaluated the ingestion of microplastics (MP) by copepods in Terminos Lagoon (TL), a RAMSAR-listed site in the southern Gulf of Mexico. The evaluation was carried out in two contrasting seasons of 2022, as follows: the dry (April) and the rainy (October). Copepods were collected using a conical plankton net (mesh size of 200 μm). In the laboratory, a pool of all pelagic adult copepod taxa was picked, and the MP inside the organisms were extracted, classified, and photographed using traditional optical and scanning electron microscopy. A total of 268 MP particles were extracted from the interior of copepods; among them, 149 and 119 corresponded to the dry and rainy seasons, respectively. The ingestion rate in the dry season was 0.14, while in the rainy season, it was 0.11. In addition, fibers, plastic fragments, and microspheres with different colors (blue, red, black, green, transparent, and multicolored), sizes, forms (angular, round, triangular, and twisted), and textures were also detected. Fibers were the most abundant MP found in a proportion of more than 85%. In addition, in some sampling sites, microspheres were observed with high relative abundance values (80%). In some sites, fragments reach 20% of the total abundance. Significant differences were observed between the two seasons. The sites closest to the urban area adjacent to TL observed high diversity and abundance of MP. The higher abundance of MP in the dry season is due to lower river discharge, on the other hand. Thus, MP particles accumulate and become available for consumption by copepods. This is the first study that has revealed that the MP was ingested by the copepods in TL. Furthermore, this study provides a baseline information for future research on the abundance of MP in the Gulf of Mexico region.

Four new Gulf of Mexico records and nine geographic range extensions of peracarid crustaceans within the Gulf are presented for the southwestern Gulf of Mexico. The new records were obtained from plankton samples collected in the inlets of three Mexican coastal lagoons: Río Soto la Marina, Tamaulipas; Camaronera Lagoon, Veracruz and Términos Lagoon, Campeche. The new records include seven amphipod species (Caprella penantis, Gammaropsis atlantica, Monocorophium insidiosum, Hartmanodes nyei, Metaharpinia floridana, Westwoodilla sp., Parametopella texensis), one cumacean (Cyclaspis sp.) and five isopods (Excorallana berbicensis, Anilocra abudefdufi, Sphaeroma walkeri, Armadilloniscus sp., Erichsonella attenuata).

"OBSERVATIONS ON FEEDING, MATURITY, AND FECUNDITY OF CALLINECTES SIMILIS WILLIAMS, 1966, ON THE CENTRAL CONTINENTAL SHELF OFF VERACRUZ, GULF OF MEXICO" published on 01 Jan 2000 by Brill.