Mexican snook (Centropomus poeyi ), a new predator of devil fish (Pterygoplichthys pardalis)

Abstract

Se reporta por primera vez al robalo prieto (Centropomus poeyi) como depredador del pez diablo (Pterygoplichthis pardalis). Las observaciones fueron hechas a partir de la disección de estómagos de seis ejemplares de robalo prieto, colectados los días 13 y 14 de abril del 2014, durante la realización del torneo de pesca deportiva en Palizada, Campeche, México. Es necesario realizar un trabajo de campo sistemático para documentar la importancia relativa de P. pardalis en la dieta del robalo prieto así como el efecto de otros organismos que también lo depredan en el sureste del Golfo de México.

Trophic Ecology and Resource Partitioning of Common Snook and Mexican Snook in the Usumacinta River Delta

“…The Common Snook consumed primarily fish from the families Engraulidae, Clupeidae, and Elopidae, highly mobile species that inhabit the water column (Luczkovich et al 1995;Blewett et al 2006). In contrast, the Mexican Snook consumed more fish of the Cichlidae, Poeciliidae, and Loricariidae families, which are associated with aquatic vegetation located in the shallow areas of the estuary (Miller 2009;Wakida-Kusunoki and Toro-Ramírez 2016). Accordingly, gut content analysis revealed a higher proportion of plant remains in Mexican Snook versus Common Snook.…”

“…2006). In contrast, the Mexican Snook consumed more fish of the Cichlidae, Poeciliidae, and Loricariidae families, which are associated with aquatic vegetation located in the shallow areas of the estuary (Miller 2009; Wakida‐Kusunoki and Toro‐Ramírez 2016). Accordingly, gut content analysis revealed a higher proportion of plant remains in Mexican Snook versus Common Snook.…”

“…2009). Information on the Mexican Snook diet is more limited; it has been documented that fish are a primary food source, followed by crustaceans, insects, and plant remains (Chávez 1963; Wakida‐Kusunoki and Toro‐Ramírez 2016). The high proportion of plant remains in the gut content of Mexican Snook as compared with Common Snook suggests that it may feed in habitats with abundant vegetation (Blewett et al.…”

“…The Common Snook presents spatial and temporal changes in the composition of its diet associated with the hydrological cycle (Stevens et al 2010(Stevens et al , 2018, the availability of food among habitats (Blewett et al 2006;Souza-Lira et al 2017), and anthropogenic alterations (Adams et al 2009). Information on the Mexican Snook diet is more limited; it has been documented that fish are a primary food source, followed by crustaceans, insects, and plant remains (Chávez 1963;Wakida-Kusunoki and Toro-Ramírez 2016). The high proportion of plant remains in the gut content of Mexican Snook as compared with Common Snook suggests that it may feed in habitats with abundant vegetation (Blewett et al 2006;Fertlin-Contente et al 2009).…”

Does invasion by armored catfish shift trophic ecology of native fishes? Evidence from stable isotope analysis

“…Much of the basin has been impacted by deforestation, agriculture, and natural resource extraction (Dürr, 2017; Gandin, 2012; Tapia‐Silva et al, 2015), and African palm oil plantations have propagated mainly in LPR and SPR in Guatemala (Camacho‐Valdez et al, 2022), although some of these plantations in SPR are not yet documented. In recent decades, P. pardalis , P. disjunctivus , and their hybrids have been reported in various locations (Gaitán et al, 2020; Wakida‐Kusunoki et al, 2007; Wakida‐Kusunoki & Amador del Ángel, 2008). By 2010, these invasive catfish expanded throughout the Usumacinta, reaching Río Salinas‐Chixoy, Río La Pasion, and Río San Pedro in Guatemala, the latter two sub‐basins with high abundances (Elías et al, 2022).…”