Environmental and anthropogenic factors often drive population declines in top predators, but how their influences may combine remains unclear. Albatrosses are particularly threatened. They breed in fast-changing environments, and their extensive foraging ranges expose them to incidental mortality (bycatch) in multiple fisheries. The albatross community at South Georgia includes globally import...

Shrimp fishery bycatch of the Gulf of California constitutes a wide variety of highly unknown fish, crustacean, and mollusk species with very low or null economic value, in contrast to those of commercial interest. However, there are no studies yet on the role of these low economic valued species have in the community structure and function, together with their possible effect on commercial pop...

An improved understanding of bycatch mortality can be achieved by complementing field studies with laboratory experiments that use physiological assessments. This study examined the effects of water temperature and the duration of net entanglement on physiological disturbance and recovery in coho salmon (Oncorhynchus kisutch) after release from a simulated beach seine capture. Heart rate was mo...

Bycatch is a major fisheries management issue that negatively impacts global marine ecosystems. Reducing protected species bycatch can be difficult because most commercial fishing gear nonselective, many occupy similar habitats as target species, and significant investments collaborations are needed to test reduction solutions. has been reduced in fisheries, but could further using novel sociot...

This paper summarises key findings from several experiments to determine the most effective branch line weighting options for pelagic longline fisheries. Initial (0-2 m deep) and overall sink rates of a range of line weighting options – each comprising a different combination of weight and leader length (distance between hook and weight) – were compared and several options identified that offer...

The effects of human-caused mortality, such as fisheries bycatch, endangered, threatened and protected (ETP) species marine mammals can be evaluated using population model-based stock assessments. information available to conduct assessments is often very limited. Available data might include fragmented time-series abundance estimates, incomplete on bycatch for the that interact with ETP (often...

Bycatch in marine fisheries is the leading source of human-caused mortality for mammals, has contributed to substantial declines many mammal populations and species, extinction at least one. Schemes evaluating bycatch largely rely on estimates abundance bycatch, which are needed calculating biological reference points determining conservation status. However, obtaining these resource intensive ...