Telling the same story: Fishers and landing data reveal changes in fisheries on the Southeastern Brazilian Coast

Fogliarini, Carine O.; Ferreira, Carlos E. L.; Bornholdt, Jéssica; Barbosa, Moysés Cavichioli; Giglio, Vinicius J.; Bender, Mariana G.

doi:10.1371/journal.pone.0252391

Cited by 19 publications

(6 citation statements)

References 96 publications

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“…One potentially important factor limiting pikeperch populations is a lack food availability for juveniles, especially during overwintering months. As proportions of predatory fish in populations decline due to intensive harvesting (Myers et al 2003; Fogliarini et al 2021), cyprinids, such as bream and roach, often become the dominant species in freshwater and brackish coastal systems. For example, the biomass of roach in Kaunas Reservoir has nearly quadrupled after the commercial fishing ban, as this species is not regularly targeted by anglers (Dainys et al 2022a).…”

Section: Discussionmentioning

confidence: 99%

Status and future perspectives for pikeperch (Sander lucioperca) stocks in Europe

Jakubavičiūtė

Arula

Dainys

et al. 2022

Preprint

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Pikeperch (Sander lucioperca) is a European fresh and brackish water piscivorous fish, important as both a key predator and a valuable commercial and recreational fisheries species. There are concerns that some stocks are depleted due to overfishing and environmental changes. We review data collection and population assessments currently used for nine pikeperch stocks across six European countries and apply a unified assessment framework to evaluate population status and trends. For this we first standardised commercial, scientific, and recreational catch-per-unit-effort (CPUE) and catch time series and then applied Bayesian surplus production models. Our results showed that three stocks (including two in the Baltic Sea) were strongly depleted, with estimated biomasses considerably lower than the biomass at maximum sustainable yield (Bmsy). Other stocks were either close or higher than their estimated Bmsy. Looking at the trends, we find that four stocks (Lake Oulujarvi, Kvadofjarden, Lake Peipsi and Lipno) showed increasing biomass trends and two (Curonian Lagoon, Galtfjarden) had a strong decline in biomass. In most cases the stocks with clear signs of recovery were also those for which strong management strategies have been implemented. We find that, despite pikeperch being one of the most valuable inland fisheries, formalised stock assessments and regular surveys remain rare. Importantly, although most stocks are strongly targeted by recreational fishing, estimates of recreational catch are highly uncertain. We conclude that data limited stock assessment methods are useful for assessing fish population status and highlight an urgent need to improve pikeperch scientific monitoring and assessment of recreational catches.

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Section: Discussionmentioning

confidence: 99%

Status and future perspectives for pikeperch (Sander lucioperca) stocks in Europe

Jakubavičiūtė

Arula

Dainys

et al. 2022

Preprint

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“…Several species of demersal and pelagic sharks and rays reported in the archaeological record [97][98][99][100] , have seen reductions in population sizes over the last decades [102][103][104] , and are currently listed in the Vulnerable (VU), Endangered (EN), Critically Endangered (CR) and/or Regionally Extinct (RE) categories 101 . Long-living species of Sciaenidae and Ariidae are currently considered overexploited with risks of signi cant catch reduction in the near future, while others have collapsed 24,105 .…”

Section: Discussionmentioning

confidence: 99%

Bridging archaeology and marine conservation in the Neotropics

Fossile

Herbst

McGrath

et al. 2022

Preprint

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Anthropogenic impacts on tropical and subtropical coastal environments are increasing at an alarming rate compromising ecosystem function, structure and services. Understanding the scale of marine population decline and diversity loss requires a long-term perspective that incorporates information from a range of sources. The Southern Atlantic Ocean, however, represents a major gap in our understanding of pre-industrial marine species composition. Here we contribute to fill this gap by performing an extensive review of the published data on Middle and Late Holocene marine fish composition along the southern coast of Brazil. This region preserves archaeological sites that are unique archives of past socio-ecological systems and of pre-European biological diversity. We assessed snapshots of species compositions and relative abundances spanning the last 5000 years, and modelled differences in species’ functional traits between archaeological and modern fisheries. We found evidence for both generalist and specialist fishing practices in pre-European times, with large body size and body mass caught regularly over hundreds of years. Comparison with modern catches revealed a significant decline in these functional traits, possibly associated with overfishing and the escalating human impacts in recent times.

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“…In Brazilian waters, the scarce knowledge on A. thazard also hinders the management for the stock, even though it comprises of a target species for artisanal fisheries in SE Brazil (da Silveira Menezes et al, 2010;Martins et al, 2020). Additionally, the overexploitation of more valuable fish stocks has resulted in their replacement by new target species, which includes some small-tunas (Fogliarini et al, 2021).…”

Section: Discussionmentioning

confidence: 99%

Age, growth and maturity of frigate tuna (Auxis thazard Lacepède, 1800) in the Southeastern Brazilian coast

Vieira

Costa

Braga

et al. 2022

Aquat. Living Resour.

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Age, growth and maturity of frigate tuna (Auxis thazard) were studied for the first time in Southeast Brazil. A total of 650 fish (265–494 mm Fork Length) were sampled from beach-seine landings between March 2018 and February 2019. Sectioned fin spines from 548 specimens were processed and age was determined by counting and measuring of increments. Growth parameters were fitted to length-at-age data using the von Bertalanffy growth function and were compared to the literature using the growth performance index (Phi). Macro and microscopic characterization of gonads and physiological indexes were used for the analysis of the reproductive cycle. The length distribution did not differ by sex. Assigned ages were between 0+ and 4 years, with annual increments formed during winter. Coefficient of variation between readings was 11%. Growth differed by sex, and the von Bertalanffy growth parameters were L∞ = 471 mm; k = 0.47 year−1; and t0 = –1.46 year−1 for females; L∞ = 498 mm; k = 0.35 year−1; and t0 = –2.01 year−1 for males. Phi was 5.0 for both sexes. Estimated growth rate is among the lowest recorded for the species, possibly related to the method used for age and growth assessment. Gonadosomatic index peaked in December, associated with the upwelling of the South Atlantic Central Waters, at a temperature of approximately 16 °C. Spawning activity in colder waters has never been reported for this species and may be influenced by a richer habitat caused by the intrusion of more nutritive rich waters during spring-summer, which allows larval development. Length-at-first-maturity (L50) was 345.4 mm for females and 329.8 mm for males.

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Telling the same story: Fishers and landing data reveal changes in fisheries on the Southeastern Brazilian Coast

Cited by 19 publications

References 96 publications

Status and future perspectives for pikeperch (Sander lucioperca) stocks in Europe

Status and future perspectives for pikeperch (Sander lucioperca) stocks in Europe

Bridging archaeology and marine conservation in the Neotropics

Age, growth and maturity of frigate tuna (Auxis thazard Lacepède, 1800) in the Southeastern Brazilian coast

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