Reproductive potential of Pagrus pagrus (Perciformes: Sparidae) in coastal waters of Buenos Aires Province (Argentina) and Uruguay (34º-39ºS)

Militelli, María Inés; López, Sofía; Rodrigues, Karina Andrea; García, Sebastián; Macchi, Gustavo J.

doi:10.1590/1982-0224-20160127

Cited by 5 publications

(3 citation statements)

References 31 publications

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“…Maturity parameters were from Militelli et al. (2017). Length‐weight parameters were from Haimovici et al.…”

Section: Methodsmentioning

confidence: 99%

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Age, growth, and biomass projections of red porgy Pagrus pagrus (Teleostei, Sparidae) after the fishery collapse in southern Brazil

Kikuchi,

Cardoso,

Mourato

et al. 2023

Fisheries Management Eco

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A formerly unexploited stock of red porgy that was intensely fished along southern Brazil in the 1970s collapsed in less than a decade. Subsequently, population dynamics or stock status has not been reported, so we updated growth parameters by analysis of otolith annual‐increments and micro‐increments. Growth did not change after the stock collapsed, which suggested no density‐dependent effect. Given the lack of growth changes and data‐limitation, we used an age‐structured assessment model set until 1984 to forecast relative spawning biomass and assess recovery possibilities. Projections showed that a 19 years moratorium would have been necessary for the stock to rebuild. The model suggested an annual catch of at least 170 t in the post‐collapse period because the stock did not recover, and a small‐scale hand‐line fishery with unreported landings continued fishing. Our results reinforced the need for more curated and up‐to‐date data collection to properly assess and manage this formerly abundant stock.

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“…Maturity parameters were from Militelli et al. (2017). Length‐weight parameters were from Haimovici et al.…”

Section: Methodsmentioning

confidence: 99%

“…Instantaneous natural mortality was estimated from, M = 5.109/t max (Then et al, 2015). Maturity parameters were from Militelli et al (2017). Length-weight parameters were from Haimovici et al (2020), and the weight-fecundity relationship assumed fecundity was proportional to weight.…”

Section: Otolith Macrostructure Analysismentioning

confidence: 99%

Age, growth, and biomass projections of red porgy Pagrus pagrus (Teleostei, Sparidae) after the fishery collapse in southern Brazil

Kikuchi,

Cardoso,

Mourato

et al. 2023

Fisheries Management Eco

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“…(primavera) e 27,0x 10 -4 ±2,80x 10 -4 (verão) e assim como nas fêmeas foram mais elevados na primavera e no verão em relação ao período outono/inverno (P=0,011) Paraty têm a renda primariamente de origem da pesca e em segundo lugar o turismo (Nora et al, 2017). No trabalho de Nora et al (2017) (Andrade et al, 2003), o pargo (Pagrus pagrus) (Militelli et al, 2017),o peixe enxada (Chaetodipterus faber) (Soeth et al, 2019), entre outras espécies subtropicais.…”

Section: -Cetotestosterona (11-kt)unclassified

Mudanças morfofisiológicas sazonais durante o ciclo reprodutivo da prejereba (Lobotes surinamensis BLOCH 1970) (Perciformes: Lobotidae) em ambiente natural

Fagundes¹

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The population dynamics of the red porgy Pagrus pagrus along southern Brazil, before its fishery collapse in the 1980s: a baseline study

Haimovici

Kikuchi

Cardoso

et al. 2020

Aquat. Living Resour.

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The intense exploitation since 1972 of the formerly only slightly exploited protogynous hermaphroditic fish Pagrus pagrus (L.) in southern Brazil has led in less than a decade to the collapse of the fishery, with no recovery four decades later. In this study we analized the age structure, growth, reproduction and mortality of the species were studied based on samples collected from 1976 to 1985 to provide a baseline before the onset of overexploitation. Maximum estimated ages were 21 and 26 years based on scale and otolith readings, respectively. Mean total length (TL) at age did not differ between males and females, while hermaphrodites were smaller. The von Bertalanffy growth coefficients for all fish (immature, females, hermaphrodites and males) were L∞ = 447 mm, k = 0.204 and t0 = −1.134 yr. Change in growth was observed during the study period. Females were dominant at all sizes, hermaphrodites were only present up to intermediate sizes, and males, despite being infrequent at small sizes, made up over 40% among the larger specimen (TL > 400 mm). Spawning took place mainly in late spring and condition factors were lower after spawning. Natural mortality was estimated as M = 0.173 yr−1 based on the von Bertalanffy growth parameters. Total mortality (Z) and exploitation rate (E) estimated from catch curves of fully recruited red porgies aged five to ten years increased from 0.24 yr−1 and 28% before 1973 to 0.49 yr−1 and 63% in the following years. Two distinct scale and otolith patterns, one with well-marked annuli and another with faint or absent annuli, suggested that the red porgy stock off southern Brazil might not be homogeneous and may include subpopulations that do not fully mix.

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Reproductive potential of Pagrus pagrus (Perciformes: Sparidae) in coastal waters of Buenos Aires Province (Argentina) and Uruguay (34º-39ºS)

Cited by 5 publications

References 31 publications

Age, growth, and biomass projections of red porgy Pagrus pagrus (Teleostei, Sparidae) after the fishery collapse in southern Brazil

Age, growth, and biomass projections of red porgy Pagrus pagrus (Teleostei, Sparidae) after the fishery collapse in southern Brazil

Mudanças morfofisiológicas sazonais durante o ciclo reprodutivo da prejereba (Lobotes surinamensis BLOCH 1970) (Perciformes: Lobotidae) em ambiente natural

The population dynamics of the red porgy Pagrus pagrus along southern Brazil, before its fishery collapse in the 1980s: a baseline study

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