Relative efficiency of square-mesh codends in an artisanal fishery in southern Brazil

Catarina N.S. Silva, José H. Dias, André P. Cattani, Henry L. Spach


DOI: https://doi.org/10.3856/vol40-issue1-fulltext-12

Abstract


The relative efficiency of two square-mesh codend designs with the same circumference (~2 m) but different mesh sizes and materials (32 mm polyethylene-PE and 30 mm polyamide-PA) was tested in an artisanal shrimp trawl fishery in Paraná, southern Brazil. The two square-mesh codends were hauled alternately with a 26 mm diamond-shaped mesh codend (control) in a twin gear configuration. Although not significant, the mean numbers of total bycatch were reduced by 16.6 and 10.0% with the 32 and 30 mm square-mesh codends, respectively. The results indicate significant improvement in size selectivity for some species (Xiphopenaeus kroyeri and Stellifer rastrifer). The operational changes tested can be a suitable technical solution for reducing the capture of immature organisms in the shrimp trawl fishery in Paraná, Brazil.

Silva C, Dias J, Cattani A, Spach H. Relative efficiency of square-mesh codends in an artisanal fishery in southern Brazil. Lat. Am. J. Aquat. Res.. 2017;40(1): 124-133. Available from: doi:10.3856/vol40-issue1-fulltext-12 [Accessed 15 Dec. 2019].
Silva, C., Dias, J., Cattani, A., & Spach, H. (2017). Relative efficiency of square-mesh codends in an artisanal fishery in southern Brazil. Latin American Journal of Aquatic Research, 40(1), 124-133. doi:http://dx.doi.org/10.3856/vol40-issue1-fulltext-12