[EN] Thirty-three stations were visited in 1991-1992 in the Gulf of Tehuantepec, Mexico CEEMEX P5 and P7 and samples were obtained with a 10.67 m (35 feet) and a 24.38 m (80 feet) headrope length shrimp trawl, and a Mediterranean bottom trawl. Fifty-five species and subspecies of macro-crustaceans were collected: 5 species of Stomatopoda, 14 Penaeoidea, 1 Caridea, 1 Palinura, 8 Anomura, and 26 Brachyura. As many as 14 species, hitherto unknown in the Gulf of Tehuantepec, were found, including 3 species of shrimp (Trachypenaeus faoe, Sicyonia martini and Processa aequimana), 4 Anomura (Paguristes cf. bakeri, Paguristes digueti, Petrochirus californiensis, and Porcellana hancocki), and 7 Brachyura (Hypoconcha lowei, Paradasygyius depressus, Pyromaia tuberculata, Neodoclea boneti, Stenocionops ovata, Callinectes toxotes, and Oediplax granulata). Most species range from California, Baja California or the Gulf of California, to Peru/Ecuador. Considering the entire CEEMAX project (P4 cruise, March-April 1991), a total of 77 species was collected. Of these, 22 species (28.9%) were consistently captured during the three legs of the project. Variations noted among composition of catches (three legs) were independent of the fishing effort, depth range and type of gear used. A sharp decrease in number of species collected was observed during the P5 cruise. The species richness observed along transects does not depend primarily on period of sampling. This is supported by a cluster analysis which showed very strong similarity among species assemblages obtained along individual transects during both cruises. It also indicates a stronger similarity, on the one hand, between the western Gulf assemblages (transects A-B), and on the other hand, among transects C-E, in the eastern portion of the Gulf

[ES] Se visitaron 33 estaciones entre 1991-1992 (5 transectos) en el Golfo de Tehuantepec, México (CEEMEX P5 y P7) utilizando redes camaroneras tipo comercial de 10.67 m (35 pies) y 24.38 m (80 pies) y una red tipo mediterráneo. [...]

28 pages, 6 figures, 2 tables, 1 appendix

Peer reviewed