Biogeographical affinities of fish associated to the shrimp trawl fishery in the Gulf of Tehuantepec, Mexico

• Published in: Revista de Biología Tropical
• Main Authors: Martínez-Muñoz, Marco Antonio, Lloris, Domènec, Gracia, Adolfo, Ramírez-Murillo, Ricardo, Sarmiento-Nafáte, Saul, Ramos-Cruz, Sebastián, Fernández, Felipe
• Format: Article in Journal/Newspaper
• Language: English
• Published: Universidad de Costa Rica 2016
• Subjects: biogeography; ichthyofauna; shrimp; fisheries; by-catch; Gulf of Tehuantepec; biogeografia; ictiofauna; camarón; pesca; fauna de acompañamiento; Golfo de Tehuantepec; Arctic
• Online Access: https://revistas.ucr.ac.cr/index.php/rbt/article/view/19034; https://doi.org/10.15517/rbt.v64i2.19034

Fish by-catch of shrimp fishery from the Gulf of Tehuantepec is composed of several species that are mainly discarded. In this study, fish by-catch species composition, distribution and biogeographical affinities were analyzed. For this, a total of 15 cruises were carried out on the continental shelf, at depths from 15 to 64 m, during 2003, 2004, 2005 and 2013. Results showed that fish by-catch was represented by 58 families, 129 genera and 242 species. The families Haemulidae, Sciaenidae, Paralichthyidae, Gerreidae and Carangidae accounted for > 70 % of the catch. Haemulopsis axillaris, Syacium ovale, Selene peruviana, Diapterus peruvianus, Larimus acclivins and Stellifer erycimba were the most frequent species at < 40 m depth (inner shelf), and Prionotus stephanophrys, Scorpaena russula, Porichthys analis and Synodus scituliceps were dominant at 40-60 m depth (outer shelf). Analysis of biogeographical affinities showed that 36.1 % of species had a wide distribution, from San Diego Province to the Panamic Province, while 13.2 % had a restricted distribution in the Mexican and Panamic Provinces. The ichthyofaunal composition was markedly influenced by the local environment and seasonal conditions. En la pesquería del camarón del Golfo de Tehuantepec un gran número de especies de peces se capturan como fauna de acompañamiento y son descartadas. La composición, distribución y afinidades biogeográficas de la ictiofauna acompañante del camarón fue analizada mediante 15 cruceros desarrollados en la plataforma continental entre 15-64 m de profundidad durante 2003, 2004, 2005 y 2013. La ictiofauna descartada estuvo representada por 58 familias, 129 géneros y 242 especies. Las familias, Haemulidae, Sciaenidae, Paralichthyidae, Gerreidae y Carangidae aportaron más del 70 % de la captura. Haemulopsis axillaris, Syacium ovale, Selene peruviana, Diapterus peruvianus, Larimus acclivins y Stellifer erycimba fueron las especies más frecuentes en profundidades menores de 40 m (plataforma interna), mientras que Prionotus ...