Spatially coordinated predation with division of labor increases feeding success in killer whales.

Group hunting is widespread among large vertebrates and is known to confer considerable advantages compared with foraging alone. Yet, the mechanisms underlying group hunting, including how social predators are organized during a hunt, are largely unknown for marine predators. Using drone videos, we tracked the predatory behavior of killer whales along the Norwegian coast to test the hypothesis that group hunting is organized in space, both in terms of individual roles and interactions with conspecifics.

Transient cognitive impacts of oxygen deprivation caused by catch-and-release angling.

Vertebrate brain function is particularly sensitive to the effects of hypoxia, with even brief periods of oxygen deprivation causing significant brain damage and impaired cognitive abilities. This study is the first to investigate the cognitive consequences of hypoxia in fish, specifically induced by exhaustive exercise and air exposure, conditions commonly encountered during catch-and-release (C&R) practices in recreational fishing. Angling exerts substantial pressure on inland fish populations, underscoring the need for sustainable practices like C&R.