Population dynamics of Scomberomorus brasiliensis from a small-scale fishery off Southern Brazil

Chaves, P. T. C.; Birnfeld, P. O.; Vaz‐dos‐Santos, André Martins

doi:10.1590/2675-2824069.20-016pdtdcc

Cited by 2 publications

(1 citation statement)

References 28 publications

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“…Both conditions simultaneously apply to four species: G. barbus, S. brasiliensis, M. furnieri, and Macrodon ancylodon. These species play an important role in landings in Southern Brazil (MMA 2005;Chaves and Silva 2019;Chaves et al 2021), and juveniles are being exploited by both trawling and gillnets. Because more species are caught by trawling, this gear acts on more undersized species than gillnets.…”

Section: Discussionmentioning

confidence: 99%

Juveniles and undersized fish in small-scale fisheries: gillnets are not less implied than trawling

Chaves

2021

Mar Fish Sci

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Of particular concern in commercial fishing catch is 'size bycatch', i.e., the death of early stages of resources that would reach a marketable value when they turn into adults. This event is frequently associated with trawling because of the lower size selectivity of this gear as compared to gillnets. However, this is expected when small-scale fisheries (SSF) employ gillnets simultaneously in setnets + driftnets that mix multiple mesh sizes. This work analyzes fishing captures and compares characteristics of fish catch from gillnets and trawlers with respect to size at first maturation, legal size of capture, and expected discards. Data were obtained from 2007-2021 for SSF in Southern Brazil. A total of 112 fish species were represented in the data. Gillnets exploited fewer species than trawlers; however, most of these constitute fishing resources in the study region. Of the 19 species whose maturation size is known, nine occurred in gillnets as juveniles, and of the 14 species for which the legal size of capture is established, seven occurred in gillnets in prohibited sizes. Gillnets and trawlers presented size bycatch and affected different species between them, with four resources that were present in bycatch from both gillnets and trawlers. The broad range of mesh sizes employed by SSF warns of the discarding of undersized captures, and stresses the importance of policies addressing gillnet management.

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Section: Discussionmentioning

confidence: 99%

Juveniles and undersized fish in small-scale fisheries: gillnets are not less implied than trawling

Chaves

2021

Mar Fish Sci

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Scomberomorus brasiliensis (Scombridae) fishery on southern and southeastern coast of Brazil

Jankowsky

Mendonça

2022

An. Acad. Bras. Ciênc.

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Fishing for serra Spanish mackerel takes place along the Brazilian coast.Studies in northern and northeastern regions show that has socioeconomic importance although risk of overexploitation. This article provides an assessment of fi sheries in the southeastern and southern regions, where there is a gap in knowledge. To build a regional perspective, fi shing monitoring data from Santa Catarina, Rio de Janeiro, São Paulo and Paraná were used. For more detailed analyses, data from São Paulo and Paraná were chosen. In these two states, census data were collected on the species and quantities caught, fi shing gear used and sales value. This fi shery, mostly artisanal, has socioeconomic importance. Santa Catarina has the largest production. However, Rio de Janeiro has the most signifi cant industrial fi shery. São Paulo and Paraná produces approximately 110 t/year, mainly using drift gillnets and encircling gillnets with a mesh size of 10 to 12 cm between knots. The harvest period is during the cooler months, between May and August for São Paulo and between June and September for Paraná.The ANOVA test did not show any signifi cant variations in CPUE, thus indicating stability.The results reinforce the need for adequate management.

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Population dynamics of Scomberomorus brasiliensis from a small-scale fishery off Southern Brazil

Cited by 2 publications

References 28 publications

Juveniles and undersized fish in small-scale fisheries: gillnets are not less implied than trawling

Juveniles and undersized fish in small-scale fisheries: gillnets are not less implied than trawling

Scomberomorus brasiliensis (Scombridae) fishery on southern and southeastern coast of Brazil

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