New data on bycatch of the Brazilian Guitarfish, Pseudobatos horkelii , in Southern Brazil

Morphometric analysis to aid fisheries management of two threatened guitarfish species (Pseudobatos horkelii and Pseudobatos percellens)

“…Prior to our study, only LM have been used to describe guitarfish (genus Pseudobatos ), albeit independently and without inter‐specific comparison (Larre et al., 2021; Martins et al., 2018; Rocha & Gadig, 2013; Vooren et al., 2005). Based on linear and GM, we found that female P. horkelii were longer (TL) and wider (DW) than female P. percellens , female P. percellens were larger in length, width, and weight than male P. percellens , and size significantly influenced body form of females of both P. horkelii and P. percellens .…”

“…In addition, comprehensive research on the reproductive biology and morphological characteristics across different regions is needed to account for intra‐specific spatial variation in size at maturity and size of sexually active individuals. For instance, the maximum recorded length of P. horkelii varies among regions in Brazil: 138 cm TL in São Paulo State and 117 cm TL in Rio de Janeiro State (southeast regions), 130 cm TL in Paraná State, and 140 cm TL in Santa Catarina State and Rio Grande do Sul State (southern regions) (Larre et al., 2021; Leite et al., 2023; Martins et al., 2018; RDL personal observation). In Uruguay, the maximum recorded length of P. horkelii was 142 cm TL (Domingo et al., 2015).…”

Report of the Workshop to Finalise the Review of the Franciscana (Curitiba, Brazil, 4-5 June 2022)

“…Observed fisheries trials were conducted with plastic bottles as acoustic reflectors (i.e. regular drink plastic bottles filled with air) in the fishing community of Torres/Passo de Torres (Larre et al, 2021), southern Brazil (FMA III). Sets were either with plastic 250ml bottles every 150-170m on the headline (treatment) or no bottles (control).…”

Bycatch estimation of narrow‐clawed crayfish (Pontastacus leptodactylus) in Turkish fyke net fisheries

“…Bycatch is 40.4% of the global marine catch so is critical issue for marine conservation and resource management (Ambo‐Rappe et al, 2021; Davies et al, 2009). Bycatch in marine fisheries has been well studied (Larre et al, 2021; Pan et al, 2022; Poisson et al, 2021), whereas little is known about bycatch in inland (fresh water) fisheries (Colotelo et al, 2013) and only 37 (3.2%) studies were in fresh water, among 1152 global bycatch studies (Raby et al, 2011). However, bycatch can cause more damage to fresh water ecosystems than marine ecosystems, because so many of the world's threatened species live in freshwater ecosystems (Raby et al, 2011).…”