The silky shark, Carcharhinus falciformis, is widely distributed in tropical and temperate waters, it a common bycatch species for tuna longline fisheries. This study examined the distribution of presents relative abundance indices shark Indian Ocean by using logbook observer data from Taiwanese large-scale fishery between 2005 2019. Due to high zero catch rate, zero-inflated negative binomial ...

The response to capture is important in fisheries because it can reveal potential threats to species beyond fishing mortalities resulting from direct harvest. To date, the vast majority of studies assessing shark stress responses have used physiology or biotelemetry to look at sensitivity after capture, leaving a gap in our understanding of the behaviours of sharks during capture. We examined t...

One key issue for standardizing catch per unit effort (CPUE) of bycatch species is how to model observations of zero catch per fishing operation. Typically, the fraction of zero catches is high, and catch counts may be overdispersed. In this study, we develop a model selection andmultimodel inference approach to standardize CPUE in a case study of oceanic whitetip shark (Carcharhinus longimanus...

Sharks and rays are a global conservation concern with an increasing number of species considered at risk extinction, mostly due to overfishing. Although the recreational harvest sharks is poorly documented generally minimal, it can be comparable commercial harvest. In this study, we quantified in Western Australia, region marine coastline greater than 20,000 km. A total 33 species/taxonomic gr...