Use of the productivity and susceptibility analysis and a rapid management-risk assessment to evaluate the vulnerability of sharks caught off the west coast of Baja California Sur, Mexico

Vulnerability of elasmobranchs caught as bycatch in the grouper longline fishery in the Gulf of Gabès, Tunisia

“…A smaller list of attributes was used to facilitate the scoring of all species because basic information on several attributes is lacking for some species (Martínez -Candelas et al, 2020). Productivity was scored using six attributes (Table 1) to better distinguish between the life-history strategies of elasmobranchs (Osio et al, 2015;Furlong-Estrada et al, 2017). Duffy & Griffiths (2019) suggested the use of either size-based or age-based attributes, but not both of them to avoid redundancy as a result of the correlation between attributes.…”

“…The values of P and S were plotted on an XY graph and the V value equaled the Euclidean distance between the origin and the coordinates of P and S (Patrick et al, 2010) according to the following formula: where X 0 and ium (2) and high (3) values (Patrick et al, 2010). For P attributes, 1 indicates a low productivity and high risk, and 3 indicates a relatively high productivity and Conversely, for S attributes, 3 points to relatively high susceptibility and high risk, icates relatively low susceptibility and low risk (Patrick et al, 2010;Hobday et al, smaller list of attributes was used to facilitate the scoring of all species because ormation on several attributes is lacking for some species (Martínez -Candelas et al, roductivity was scored using six attributes (Table 1) to better distinguish between the ry strategies of elasmobranchs (Osio et al, 2015;Furlong-Estrada et al, 2017). Griffiths (2019) suggested the use of either size-based or age-based attributes, but of them to avoid redundancy as a result of the correlation between attributes.…”

“…Conventional stock assessment methods that normally allow a quantitative evaluation of fish stocks are difficult to be used for elasmobranch species because biological information is still insufficient (Furlong-Estrada et al, 2017). The PSA is a semi-quantitative method, which is particularly useful in data-poor situations.…”

Reproductive biology of the brown smooth-hound shark, Mustelus henlei (Chondrichthyes: Triakidae), off northwestern Mexico based on macroscopic and histological analyses

“…The brown smooth-hound shark, Mustelus henlei (Gill 1863), is the second most caught species in the artisanal elasmobranch fishery on the west coast of Baja California Sur (BCS, Mexico) (Furlong-Estrada et al 2017). Genetic studies I El tiburón mamón Mustelus henlei (Gill 1863) es la segunda especie de mayor captura en la pesquería artesanal de elasmobranquios en la costa occidental de Baja California Sur (BCS, México) (Furlong-Estrada et al 2017).…”

“…The brown smooth-hound shark, Mustelus henlei (Gill 1863), is the second most caught species in the artisanal elasmobranch fishery on the west coast of Baja California Sur (BCS, Mexico) (Furlong-Estrada et al 2017). Genetic studies I El tiburón mamón Mustelus henlei (Gill 1863) es la segunda especie de mayor captura en la pesquería artesanal de elasmobranquios en la costa occidental de Baja California Sur (BCS, México) (Furlong-Estrada et al 2017). De have shown that there are probably 5 subpopulations of this species in Mexican waters, 3 in the Gulf of California and 2 off the west coast of the Baja California Peninsula (Sandoval-Castillo and Beheregaray 2015); however, only the reproductive biology of the stock in the northern Gulf of California region has been studied to date.…”