The white croaker Micropogonias furnieri, in the coastal Rocha Lagoon, spawned during 5 months, in late spring and summer. It was eurythermic (gonad growth at 12·5 to 25·5 C, spawning at 20 to 27 C) and mesoxic (living at 5·2 to 9·1 mg l 1 ). The spawning occurred in brackish (8-18 salinity), basic (c. 8 pH) and oxygenated (c. 8·0 mg l 1 ) waters. The temperature appeared to be an important environmental factor affecting the timing of reproduction. The size at first maturity (19-20 cm) was 11-12 cm lower than the reported for the Río de la Plata spawning area (Uruguay). Juveniles were observed throughout most of the year suggesting that the lagoon is also a nursery area. In Brazil, M. furnieri spawns in marine areas while in Uruguay it spawns in estuaries. This is the first time that a coastal lagoon of the subtropical and temperate western coast of the South Atlantic Ocean has been shown to be a spawning area of a marine species.

No abstract

Se analizó la estructura de la población de corvina blanca (Micropogonias furnieri) capturada de manera incidental en la pesquería artesanal y multiespecífica de Laguna de Rocha, Uruguay. La especie, que es el segundo recurso pesquero en Uruguay, ha sido declarada plenamente explotada y existen pocos estudios sobre su pesca artesanal y sobre su biología, como pez que habita en las lagunas costeras uruguayas. Las corvinas blancas se obtuvieron como fauna acompañante de cinco pesquerías de distintas especies objetivo que operan en diferentes zonas de la laguna. Los cinco artes de pesca analizados (con apertura de malla de 1, 2, 4, 10 y 20 cm) capturaron distintas fracciones de la estructura por tallas, sexos y estadios de madurez. La mediana y el primer cuartil de la composición de tallas retenidas por cada uno de los artes de pesca fueron mayores que la talla de primera madurez. En este trabajo se muestra el efecto de diferentes modalidades

<b><i>Introduction:</i></b> Angiotensin-converting enzyme inhibitors (ACEIs) and angiotensin receptor blockers (ARBs) reduce proteinuria and slow renal disease progression more effectively than other therapies in patients with chronic kidney disease (CKD). However, differences regarding efficacy and safety between these therapies remain controversial. <b><i>Objectives:</i></b> Aim of this study was to analyze the different treatment effect of ACEI, ARB, and non-ACEI/ARB in CKD progression. The primary outcome was survival to end-stage renal disease (ESRD) and/or death and to ESRD censored by all-cause death, secondary outcomes were proteinuria reduction and hyperkalemia. <b><i>Methods:</i></b> We analyzed data from 1,120 patients extracted from the National Renal Healthcare Program cohort, which included 17,238 CKD nondialysis subjects who were successively monitored between ­September 1, 2004 and August 31, 2016. Inclusion criteria were at least a 1-year follow-up, 3 clinical visits, and no previous treatment with ACEI or ARB. From the baseline visit onward, patients continued with 3 different treatment schemes: no ACEI/ARB, started on ACEI or ARB, but while avoiding both treatments in combination. Chi², <i>t</i> test, binary logistic regression, and multivariate regression models (Cox proportional Hazard model and competing risk Fine and Gray model were used for statistical analysis. <b><i>Results:</i></b> Mean age and follow-up were 67.9 (± 15) and 3.8 (± 2) years, respectively. Estimated glomerular filtration rate averaged 42.1 ± 23 mL/min/1.73 m² and 300 (27%) patients were diabetics. Progression to ESRD was significantly worse in the no ACEI/ARB group (hazard ratio [HR] 4.23, 95% CI 1.28–13.92) versus ACEI (reference group; <i>p</i> = 0.01). The analysis by competing-risks’ regression showed significantly higher risk of ESRD in the no ACEI/ARB group (HR 3.63, 95% CI 1.34–9.85) versus ACEI (<i>p</i> = 0.01). There were no significant differences between ACEI and ARB groups (HR 1.31, 95% CI 0.37–4.66) regarding the risk of progression to ESRD. Survival was similar in all 3 groups (<i>p</i> = 0.051). Statistically significantly more patients experienced reductions in proteinuria/albuminuria in ACEI and ARB groups (together) versus no ACEI/ARB group (<i>p</i> = 0.016, OR 1.82, 95% CI 1.12–2.94). No difference in hyperkalemia frequency was found between them (<i>p</i> = 0.17). <b><i>Conclusions:</i></b> In patients with CKD, treatment with ACEI or ARB had a superior effect than no ACEI or ARB treatment on slowing kidney disease progression and on proteinuria reduction. Efficacy of ACEI and ARB was comparable.

57Copper, zinc, mercury and arsenic content in Micropogonias furnieri and Mugil platanus of the Montevideo coastal zone, Río de la Plata Metals (Cu, Zn, Hg) and metalloid (As) concentrations were measured in Micropogonias furnieri and Mugil platanus caught in three areas along the Montevideo coastal zone during winter 2010, spring 2010 and 2011. Compared to previous studies conducted in the zone, both species showed higher (for Cu), similar (for Zn) or lower (for Hg) concentrations. The highest Hg values were found in the M. furnieri of Montevideo bay. There was no spatial variation in Cu, Zn, and As concentrations in muscle, likely due to the high mobility of both species. However, the Cu content in the liver of M. furnieri was higher in fish from the West zone. Cu, Zn and As found in the liver of M. platanus were much higher than in that of M. furnieri. A functional relationship between muscle levels of Zn and Hg and fish length of M. furnieri indicates bioaccumulation of these metals. According to the results, M. furnieri may be used as a temporal bioindicator for Hg, but not as a spatial bioindicator. Mercury levels were below the maximum safety level based on international standard values for human consumption. AbstrAct

We analyzed the stomach contents of 2915 individuals of the whitemouth croaker, Micropogonias furnieri, ranging from 15.6 to 42.0 cm total length, collected from a coastal lagoon in Rocha, Uruguay, during 1997-1999. A total of 56% (n = 1646) of individuals were found with content in their stomachs. Six food items were identified and classified as crustaceans (49%), polychaetes (26%), vegetal debris (15%), molluscs, juvenile fishes, and unidentified contents, the latter three representing less than 5% of the total stomach contents. Fishes

No abstract

No abstract