Sistema Regional de Información
en línea para Revistas Científicas de América Latina,
el Caribe, España y Portugal

Ressenya sobre el llibre de Maite Simón (ed.), Cent anys fent llibres. La trajectòria d’una editorial universitària. PUV 1920-2020, València, Publicacions de la Universitat de València, 2021, 384 p., ISBN: 978-84-9134-894-8.

Ressenya sobre el llibre de M. Àngels Francés Díez & Irene Mira-Navarro (ed.), Identitats culturals contemporànies: el cas català, Kassel, Edition Reichenberger, 2022, 195 p., ISBN: 978-3-967280-36-4.

This article offers a descriptive overview of the most important empirical traits that characterize differential object marking (DOM) in modern standard Romanian, ranging from purely interpretive parameters to the more syntactically oriented ones. Various aspects are reviewed, among which the argumental status of Romanian differentially marked objects, despite overt prepositional marking, interactions with clitic doubling, or with the animacy and specificity scales. The final part is dedicated to a presentation of the numerous problems Romanian DOM raises for formal accounts. Against this background, it is shown that analyses which take this phenomenon to signal a mechanism at the syntax-semantics-pragmatics interface appear to be best suited for the data.

Ressenya sobre els actes del centenari del naixement de Joan Fuster (1922-2022).

White shrimp, Penaeus vannamei, farming represents one of the most important aquaculture activities in the world with a high growth rate. However, intensification processes induce negative side effects on the health of the organism, associated with a dysbiosis phenomenon. Consequently, illnesses, mainly attributable to Vibrio genus bacteria, have been reported in shrimp ponds. Studying the diversity and ecology of the associated bacteria in aquaculture systems is essential to prevent and control diseases. Therefore, the present study analyzes the bacterial load and microbial population variation in P. vannamei hepatopancreases infected with a pathogenic Vibrio parahaemolyticus strain (so-called CVP2) associated with acute hepatopancreatic necrosis disease (AHPND) under controlled conditions. The results showed an important change in the microbial community structure of the P. vannamei hepatopancreas. Furthermore, the presence of the Vibrio genus considerably increased and clearly dominated compared with the control. Dysbiosis of the hepatopancreatic microbiota and constrictions in the hepatopancreatic tubules (characteristic signs of in the early stage of AHPND) could be observed before the visible manifestation of the disease.

In commercial fish farming, growth performance is the most influential factor in economic profitability; so, biomass optimization has become a growing concern. We analyzed the influence of 3 harvest densities (15, 20, and 22 kg·m–3) on the growth of spotted rose snappers reared in floating net cages during a production cycle. To assess the impact of stocking density on growth performance, we used 2 indicators: final total length-at-age (12 months) and the growth rate estimated from growth models (von Bertalanffy, logistic, and Gompertz). For the first indicator, we tested for normality. We did the Kruskal–Wallis and the post hoc Kruskal–Wallis tests to compare the mean total final length from each density. Accordingly, the means of densities D15 and D20 were the same (P value = 0.22). For the second indicator, we fitted the models with the subroutine optim of the R statistical package using the L-BFGS-B algorithm. Model selection was made with the Akaike and the Bayesian information criteria. Both criteria suggested that the logistic model fitted the data best. With the best model (logistic), we did 1,000 bootstrap simulations for each density scenario to determine the distribution of the maximum likelihood estimation for the instantaneous growth rate. Because the estimates were normally distributed, we used ANOVA to test the equality of the instantaneous growth. The Tukey HSD test suggested that all means were statistically different from each other. The fastest growth rate (K = 0.275) corresponded to the cage with a density of 20 kg·m–3. These findings demonstrate that the logistic model can predict the growth of spotted rose snappers under culture conditions using floating net cages. These results strengthen the productive potential and economic profitability of snapper aquaculture using floating cage and may help the start of commercial scale aquaculture.

The oceanographic variation of the central Mexican Pacific (CMP) is mainly driven by the California Current and the Mexican Coastal Current, which generate a convergence zone. Little information is available regarding changes in oceanographic variables at the mesoscale level in the CMP. Therefore, this study characterized 6 oceanographic variables (sea surface temperature, chlorophyll concentration [Chl], primary productivity [PP], diffuse attenuation coefficient [K490], and particulate inorganic/organic carbon concentration [PIC, POC]) in the CMP from 2010 to 2017 and their relationships with El Niño/Southern Oscillation (ENSO). The variables were standardized to monthly pixel values of 0.08 latitude degrees, and the study area covered 48,846.48 km2. Friedman tests were used to compare the temporal variation in the variables, while Spearman correlations were used to evaluate the relationship between each variable and the Multivariate ENSO Index (MEI). A cross-correlation analysis was performed to determine the temporal lag between the oceanographic variables and the MEI. The cyclicity of the variation in the CMP was determined by spectral analysis. All variables showed significant differences between months and years. Two seasons defined by temperature were also detected: a cold season (December–June), in which high values of these variables were observed, and a warm season (July–November), in which low values of these variables were observed. No variables were correlated with the MEI; however, a 4-month time lag was identified between the variables and the MEI. The cyclicity of the variables corresponded to the cold and warm seasons. The cold phase of ENSO increased the values of PP, Chl, and K490 up to 4 times compared to those of other years. Taken together, the observed variation in oceanographic conditions makes the CMP one of the most dynamic coastal regions of the Mexican Pacific.

 The effects of vitamin A palmitate (VAP; 2.7, 27 and 165 mg/100 g diet), β-carotene (βC; 1, 9 and 50 mg/100 g diet) and retinoic acid (RA; 2.8, 28 and 166 mg/100 g diet) on the incidence of deformities in red sea bream (Chrysophrys major) larvae were examined using zein-based micro-bound diets during 15 days. Growth (final body weight, weight gain and total length) and survival rate were affected by the increasing supplementation of these compounds. The abnormalities observed in the larvae included the compression or apparent fusion of the segments in the notochord and mouth deformities. Compression/apparent fusion of the segments was detected mainly in vertebrae of the hemal zone, affecting the total length of larvae. Incidence of these deformities increased with increasing levels of VAP, βC and RA in the diets, but a significantly higher percentage of affected vertebrae was observed in the larvae fed the diets containing RA. The effect of βC was unclear in the present experiment, since only the highest concentration caused significant incidence. The results of this study show that dietary vitamin A may be related to the vertebral deformities in red sea bream larvae.

In order to determine the structure and biomass of phytoplankton (picophytoplankton, nanodiatoms, and microdiatoms) under oligotrophic conditions, a study was carried out in the surface layer of the Guaymas Basin, Gulf of California, during the late summer of 2016. This study included the measurement of hydrographic, chemical, and biological variables in the surface layer of the study area. Our results showed a warm, strongly stratified, and nutrient-depleted water column associated with reduced phytoplankton biomass (<1 mg Chla·m–3). The average ratios of N:P (0.55 ± 1.34), N:Si (0.13 ± 0.18), and Fe:N (52.70 ± 29.70) indicate N-limiting conditions. The biomass contribution of phytoplankton groups fluctuated widely by depth level, with predominance of picophytoplankton (85.0 ± 2.7%) at the surface (5 m) and nano-microdiatoms (91.5 ± 5.9%) at the deepest level (35–40 m), adjacent to the thermocline. Diatoms dominated the integrated biomass between the surface and 50-m depth, with an average contribution ~6 times greater than that of picophytoplankton. Despite the ideal conditions for the proliferation of diazotrophs, the presence of Trichodesmium spp. and Richelia intracellularis was very irregular and in relatively low abundances (2,220 ± 1,575 cell·L–1). Our results are especially relevant as they suggest that, under N-limiting conditions, the paradigm of high biomass and large cell dominance in the Gulf of California may be challenged during the summer season.

Narcine entemedor and Rhinoptera steindachneri are 2 viviparous batoid species of commercial importance on the Pacific coast of Mexico. However, no adequate management plan has been set forth for either of them to ensure sustainable use. The aims of this study were to assess the reproductive potential and the potential rate of population increase (rʹ) of both species, as well contrasting their reproductive strategies, to infer how susceptible they are to fishing exploitation. Comparatively, among batoids, N. entemedor females have an early age at maturity, relatively high fecundity, and an intermediate lifespan, while R. steindachneri females have an early age at maturity, low fecundity, and a relatively short lifespan. According to our estimates, however, both species have relatively high reproductive potential, which N. entemedor exhibits by investing energy in maximizing fecundity and R. steindachneri by increasing the embryo’s body mass. Therefore, N. entemedor has better capacity to recover from relatively high overfishing (rʹ = 0.48) in comparison with R. steindachneri (rʹ = –0.18). The methodology used in this study proved to be a good option to assess the risk of overfishing in species for which there is limited data.