El efecto de la pesca en los ecosistemas marinos ha recibido una atención creciente en los últimos años. Uno de los impactos directos más visibles es la captura de especies animales no objetivo o captura incidental (Kelleher 2008). En las pesquerías de arrastre de camarón y langostino, la mayoría de las especies que componen la captura incidental son descartadas al mar (Stobuzki et al. 2001). A nivel mundial, las estimaciones sobre el descarte señalaron que estas pesquerías, y en particular las pesquerías camaroneras tropicales, fueron por sí solas

Summary In the Province of Chubut (43°S–47°S), from 2001 to 2005 an on‐board observers program analyzed 18 903 fishing hauls captured at depths of 19–104 m. Sport fishing tournaments near Puerto Rawson, Chubut, were also monitored from 2004 to 2006. The aim was to document the southward expansion of five cartilaginous fish species and ten bony fish species caught in Central Patagonian waters (Argentina): Psammobatis extenta, Psammobatis bergi, Atlantoraja castelnaui, Sympterygia acuta, Torpedo puelcha, Selene setapinnis, Oncopterus darwini, Dules auriga, Mullus argentinae, Cynoscion guatucupa, Prionotus nudigula, Conger orbignyanus, Urophycis brasiliensis, Trachurus lathami, and Trichiurus lepturus. Reproductive populations of S. acuta, O. darwini and C. guatucupa were detected in the Engaño Bay area close to Puerto Rawson (43°10′S–43°19′S). The newly reported fishes pertain to warm‐temperate waters, where most of the species are native to the Argentinean Zoogeographic Province. One likely hypothesis explaining their occurrence in the area is the prevalence of higher water temperatures in recent times in the San Jorge Gulf and adjacent waters. Another likely hypothesis is the increase in sampling and catch efforts in Patagonian coastal areas and also improved capabilities in taxonomic recognition of the species.

No abstract

The relationship between fish functional diversity and fishing levels at which its baselines shift is important to identify the consequences of fishing in ecosystem functioning. For the first time, the authors of this study implemented a trait-based approach in the Argentine Patagonian Sea to identify the vulnerability and spatiotemporal changes in functional diversity of fish assemblages incidentally captured by a trawling fleet targeting the Argentine red shrimp Pleoticus muelleri (Spence Bate, 1888)

No abstract