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This coastal to mid-continental shelf, pelagic species is widely distributed from Brazil to Argentina. It is a short-lived species with an estimated generation length of 2-4 years. Biomass fluctuates naturally with environmental conditions. It is currently commercially exploited only in Argentina. The global population is comprised of three stocks (1. southeast Brazil north of 28°S, 2. Brazil south of 28°S, Uruguay and Argentina to 41°S and 3. Argentine Patagonia between 41°S and 48°S). Abundance of the species in Brazil is stable. According to fishery independent scientific surveys, the Buenos Aires stock has a high biomass close to historical levels and it is underexploited. The Argentine population is regularly monitored and there are stringent fishing regulations in place. Fishing activity is not expected to be driving global-level declines approaching a Near Threatened or threatened level at this time. It is listed as Least Concern with a recommendation to continue to conduct research cruises to improve stock assessments. Research is also needed to better understand the observed changes in body size structure of the southern stocks. Fil: Buratti, C.. Instituto Nacional de Investigaciones y Desarrollo Pesquero; Argentina Fil: Díaz de Astarloa, Juan Martín. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata. Instituto de Investigaciones Marinas y Costeras. Universidad Nacional de Mar del Plata. Facultad de Ciencias Exactas y Naturales. Instituto de Investigaciones Marinas y Costeras; Argentina Fil: Hüne, M.. Universidad Austral de Chile; Chile Fil: Irigoyen, A.. No especifíca; Fil: Landaeta, M.. Universidad de Valparaíso; Chile Fil: Riestra, C.. Instituto Nacional de Investigaciones y Desarrollo Pesquero; Argentina Fil: Vieira, J.P.. Universidade Federal Do Rio Grande.; Brasil Fil: Di Dario F.. Universidade Federal do Rio de Janeiro; Brasil

Lycengraulis grossidens (anchoíta de río) presenta abundantes registros de estadios larvales en el embalse de Yacyretá. El objetivo de este trabajo es caracterizar morfométrica y merísticamente los diferentes estadios larvales de esta especie, para aumentar la base de datos disponible y facilitar la identificación taxonómica. Se tomaron muestras de tres estaciones de muestreo: Ituzaingó, Garapé e Itatí, ubicadas en la provincia de Corrientes (República Argentina) durante el periodo septiembre 2015 a febrero 2016. Se reconocieron tres estadios larvales y se tomaron medidas morfométricas y merísticas básicas. Los caracteres merísticos permiten distinguir los distintos estadios en esta especie, no así las características morfométricas, que son similares en los primeros estadios. Los datos de los estadios larvales son escasos, por lo que este trabajo contribuiría a la base de datos existente en Argentina. Lycengraulis grossidens (river anchovy) presents abundant records of larval stages in the reservoir of the Yacyreta Dam. The aim of this work is to characterize the different larval stages of this species morphometrically and meristelly, to increase the database size and facilitate the taxonomic identification. Samples were collected from three sampling stations: Ituzaingó, Garapé and Itatí, located in the province of Corrientes (Argentina) during September 2015 to February 2016. Three larval stages were recognized and basic morphometric and meristic measurements were taken. The meristic characters allow us to distinguish the different stages of this species, but not the morphometric characteristics, which are similar in the first stages. Data of the larval stages are scarce so this work would contribute to the existing database in Argentina. Fil: Briñoccoli, Yanina Florencia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Nordeste. Instituto de Biología Subtropical. Instituto de Biología Subtropical - Nodo Posadas | Universidad Nacional de Misiones. Instituto de Biología Subtropical. Instituto de Biología Subtropical - Nodo Posadas; Argentina Fil: Alvarez, A.. Universidad Nacional de Misiones; Argentina Fil: Garrido, G. G.. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Nordeste. Instituto de Biología Subtropical. Instituto de Biología Subtropical - Nodo Posadas | Universidad Nacional de Misiones. Instituto de Biología Subtropical. Instituto de Biología Subtropical - Nodo Posadas; Argentina

The halophilic microbial community of the salted-ripened anchovy process was studied. Samples from raw materials (salt and fresh anchovies) and from the stages of brining and ripening were collected and analyzed for their bacterial counts at 15 and 20% NaCl. No halophilic colonies were found in fresh anchovy and counts of about 103 CFU/g were determined in salt samples. A fluctuation of bacterial counts during the process was found. At the end of brining, ~104 CFU/g were determined in anchovy samples and this value was reduced to not detectable counts at the beginning of the ripening stage. After one month, counts increased to ~104 CFU/g and remained stable until the end of the process. From each sample, colonies having different morphotypes were isolated and submitted to a macro and microscopic characterization, a study of salt requirement for growth, and biochemical and phenotypic tests. The results were submitted to Univariate, Bivariate and Multiple Correspondence Factorial Analysis (MCFA). A total of 79 colonies were isolated during the salting-ripening anchovy process. Among the isolates, about 40–50% was positive for indole production and lipolytic activity and a 25% showed ability to produce H2S and proteolytic capacity. Proteolytic and lipolytic activities were well balanced along the process and resulted independent from the isolation stage, which is a desirable condition due to the contribution of microbial proteolysis and lipolysis to the development of texture and final aroma, respectively. H2S and indole producers practically were not detected during ripening. This fact is important because indole and H2S are associated with the development of off-flavors and spoilage in salted fish products. MFCA and Cluster Analyses complemented the Bivariate Analyses. The factor map showed proximity between the isolates from salt samples and from ripening. Isolates were statistically clustered in two groups. Cluster 1 grouped non-desirable activities (H2S and indole production) with cultures proceeding from brining whereas Cluster 2 related isolates mainly from salt samples and during ripening with some desirable microbial capacities (Cytochrome oxidase activity and non-H2S and non-indole production). These results would indicate that during the ripening process of salted anchovies, a natural selection of beneficial microorganisms for the development of the typical product sensory attributes occurred.