Abstract
The shrimp fishery is one of the most important fisheries in the world, although the low selectivity from trawling nets has led to the capture of a large number of non-target species. Shrimp-bycatch species include a large number of fish and invertebrate species, of which fish species are the most abundant. The present study aims to determine the community structure as well as the average sizes at first maturity of the fish species from shrimp-bycatch caught from industrial fisheries in the Mexican Pacific from Sinaloa to Guerrero, from January to March 2015. The shrimp-bycatch fish diversity value was found to be 2.22. A total of 37 species of finfish were found, of which five were considered rare. The fish species with the highest Importance Value Index (IVI) levels were Pseudupeneus grandisquamis, Paralichthys woolmani, Lutjanus peru and Diapterus peruvianus. The average size at first maturity was calculated for all species. Of the analysed organisms, 90% were in the juvenile stage, including species with riverine and artisanal fisheries. The present study demonstrates the risk within marine populations to different non-target species due to the poor selectivity of shrimp trawls.
Highlights
Shrimp, which are among the most traded fishery products in the world, generate numerous important economic benefits (FAO, 2017), in both riverine and industrial fishery
The aim of this work is to determine the population structure and relative abundance of the fish species present in shrimp-bycatch from industrial shrimp fishery the northeast and southeast Mexican Pacific, as well as their spatial variability and potential risk involved in the recruitment of the species
This study, using data from northeast and southeast Mexican Pacific, the shrimp fishery found an impact on a total of 37 fish species, with an average of 15 species per sampled station, which negatively affects marine diversity
Summary
Shrimp, which are among the most traded fishery products in the world, generate numerous important economic benefits (FAO, 2017), in both riverine and industrial fishery. Recent years have seen an on-going emphasis on the impact of this activity on shrimpbycatch fauna; the FAO considers this fishery the main source of discarded species (Kelleher, 2004; Kumar & Deepthi, 2006; FAO, 2017). How to cite this article Tirado-Ibarra et al (2018), Reproduction and community structure of fish from winter catch sites from industrial shrimp bycatch from the northeast and southeast Mexican Pacific. Because shrimp are benthonic organisms, shrimp-bycatch includes a great diversity of fauna, including molluscs, echinoderms, crustaceans and various fishes. More than 114,000 tons of discarded fish are generated per year (Bojorquez, 1998)
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