Abstract Dormitator latifrons, a native euryhaline species belonging to the family Eleotridae, is distributed from southern California to Peru. This research study is a contribution to evaluate the effect of different salinity concentrations (0, 10, 20 and 33 UPS) on growth, survival, hematology and blood chemistry. The results show statistical difference (P < 0.05) in the treatment at 10 UPS in weight per individual (91.5 ± 7.5 g), final biomass (2286.3 ± 188.3 g) and weight gain (55.5 ± 5.9 g). In the hematological parameters, statistical differences (P < 0.05) were found in the total erythrocyte count (x 106), with the highest value (4.33 ± 0.49) in the 20 UPS treatment and the lowest value (2.77 ± 0.13) in the 0 UPS treatment; survival was greater than 90.7% in all treatments. Finally, it can be concluded that the 10 UPS treatment had a greater influence on the weight (g) of Dormitator latifrons juveniles, and the GP and EA growth rates increased proportionally in the 10 UPS treatment. The results show that salinity influences the growth of the organisms despite the fact that Dormitator latifrons is a euryhaline organism. It was observed that the highest growth occurred at a salinity of 10 UPS.

Resumen Dormitator latifrons, es una especie nativa eurihalina, perteneciente a la familia Eleotridae que se encuentra distribuido desde el sur de California hasta Perú. Este estudio de investigación es una contribución para evaluar el efecto de diferentes concentraciones de salinidad (0, 10, 20 y 33 UPS) en el crecimiento, supervivencia, hematología y química sanguínea. Los resultados muestran diferencia estadística (P < 0.05) en el tratamiento a 10 UPS en peso promedio por individuo (91.5 ± 7.5 g), biomasa final (2286.3 ± 188.3 g) y ganancia en peso (55.5 ± 5.9 g). En los parámetros hematológicos se encontraron diferencias estadísticas (P < 0.05) en el recuento total de eritrocitos (x 106), en el tratamiento a 20 UPS se presentó el mayor valor (4.33 ± 0.49) y en el tratamiento a 0 UPS el menor valor (2.77 ± 0.13), la supervivencia fue mayor al 90.7% en todos los tratamientos. Finalmente, se puede concluir que el tratamiento a 10 UPS generó mayor influencia en el peso (g) de juveniles de Dormitator latifrons, asimismo las tasas de crecimiento GP y EA incrementaron proporcionalmente en el tratamiento a 10 UPS. Por lo cual se considera esta especie con potencial acuícola, los resultados, muestran que la salinidad influye en el crecimiento de los organismos a pesar de que Dormitator latifrons es un organismo eurihalino. Se observó que el mayor crecimiento se presentó a una salinidad de 10 UPS.

Abstract: Through a hermeneutical approach, this paper states that personal identity overcomes the aporetic of time when built as a fictional narrative. First, it proposes that the fictional narrative is inscribed in the mimesis circle. Secondly, that imagination is the faculty that creates the meaning of personal identity as fictional narrative. Thirdly, that it is the imagination that establishes the relation among fictional narrative, semantic innovation, and personal identity. Fourthly, that personal identity as fictional narrative stresses the importance of the narrative, which creates itself as a generator of meanings.

Resumen: Mediante un ejercicio hermenéutico se sostiene que la identidad personal supera la aporía del tiempo al construirse como relato de ficción. Primero, se plantea que el relato de ficción se inscribe en el círculo de la mimesis; segundo, que la imaginación es la facultad que crea el sentido de la identidad personal como relato de ficción; tercero, que es la imaginación la que establece la relación entre relato de ficción, innovación semántica e identidad personal; y cuarto, que la identidad personal se crea a sí misma por medio de la generación sentido gracias al relato de ficción.

Resumen: Un pez nativo cada vez más estudiado en Latinoamérica es el Dormitator latifrons, pero se desconoce el efecto de altas densidades de siembra en su fisiología. El objetivo fue determinar el efecto de diferentes densidades de siembra en el crecimiento y parámetros sanguíneos. Se utilizaron organismos silvestres aclimatados al cautiverio, alimentados al 4% de biomasa total durante 60 días. Se registró peso y longitud inicial y final, determinando índices de crecimiento y supervivencia. Al final del experimento se tomó una muestra de sangre al total de organismos para evaluar parámetros sanguíneos No se encontraron diferencias en el crecimiento y supervivencia entre las diferentes densidades. Los parámetros sanguíneos no fueron afectados por la densidad, a excepción del estallido respiratorio, todos se encuentran entre los rangos de referencia de buena salud para peces. La especie no presentó señales de estrés o respuesta inmune adversa asociada al incremento de la densidad de cultivo.

Abstract: The native fish Dormitator latifrons culture technology in Latin America has increased, but the effect of high stocking densities on the physiology of the species is still unknown. The objective of this study was to analyze the effect of different stocking densities on growth and blood parameters. Wild organisms were acclimatized to culture conditions, and fed daily at 4% of total biomass, during 60 days. The weight and length of the organisms were recorded at the beginning and end of the experiment, growth and survival rates were determined. At the end of the experiment, a blood sample was taken from all fish for blood parameters evaluation. No differences in growth and survival were found between the different densities tested. Blood parameters were not affected by stocking density. All blood parameters are within the reference ranges indicating good fish health, except respiratory burst. The fish did not show signs of stress or any negative immune response at all culture densities tested.

Abstract We explore, throughout the paper, the reconfiguration of social relations under the imposition of physical distancing in the context of the Covid-19 pandemic. Specifically, we analyze the loss of the haptic dimension of socio-erotic relationships and the socio-cultural transformation that this entails. Based on a fieldwork at a distance, we explore how our own body and the one of those with whom we are emotionally and socially tied have become sinister, that is, familiar and strange at the same time. Finally, we argue that the momentary suspension of the historical and cultural common ground of socio-affective relationships has allowed to identify the conditions of their possibility of them, revealing them not only as intersubjective but also defined by other agents that determine the ecology of these relationships.

Resumen Exploramos en este texto la reconfiguración de relaciones sociales bajo la imposición del distanciamiento físico en el contexto de la pandemia del Covid-19. Específicamente, analizamos la pérdida de la dimensión háptica de las relaciones socioeróticas y la transformación sociocultural que esto conlleva. Basados en un trabajo de campo desde la distancia, exploramos cómo el cuerpo propio y el de aquellos con quienes tenemos vínculos sociales afectivos se ha vuelto siniestro, esto es, al tiempo familiar y extraño. Sostenemos, finalmente, que la suspensión momentánea del fondo común histórico y cultural de las relaciones socioafectivas permitió identificar las condiciones de posibilidad de las mismas, revelándolas no sólo como intersubjetivas sino definidas por otros agentes que determinan la ecología de dichas relaciones.

Abstract The aim of this work was to propose a latent equation model that structures the relationship between academic engagement, schadenfreude and prosocial behavior on the school climate. We used a cross-sectional design and 437 secondary students from Chile were recruited. School Climate Scale, Engagement UWES-S 9, School Prosocial Behavior Inventory and Schadenfreude scale were administered. Factor analysis, reliability test, correlation analysis and structural equation modeling were performed to analysis data. After fitting two models for our data and contrasting them with theoretical literature, we found that school climate was affected directly by school engagement and prosocial behavior. Academic engagement positive affects, direct and indirectly, the school climate. An increase in academic engagement also lowers the levels of schadenfreude and causes an increase in the levels of prosocial behaviour. Results are discussed and possible implications are highlighted, considering limitations and suggestions that might guide practical interventions on school climate.

Résumé L’objectif de ce travail était de proposer un modèle d’équation latente qui structure la relation entre l’engagement scolaire, la schadenfreude et le comportement prosocial sur le climat scolaire. Le travail a été réalisé en suivant une méthodologie quantitative basée sur un modèle transversal-transectionnel et un échantillonnage non probabiliste de 437 lycéens (Chili). On a appliqué les échelles de Climat scolaire, l’Engagement UWES-S 9, l’Inventaire de comportements pro-sociaux dans le contexte scolaire et la Schadenfreude scale. On a réalisé une analyse factorielle et une analyse de fiabilité des instruments appliqués, calculé les corrélations de Pearson et les équations structurelles. Après avoir adapté deux modèles aux données obtenues et les avoir confrontés à la littérature théorique, on a trouvé que l’engagement académique affecte toutes les variables. L’engagement académique affecte positivement, directement et indirectement, le climat scolaire. Une augmentation de l’engagement scolaire abaisse également les niveaux de schadenfreude et provoque une augmentation des niveaux de comportement pro-social. On discute ensuite les implications de ces résultats, leurs limites et on propose quelques idées susceptibles d’orienter la recherche et l’intervention concernant le climat scolaire.

Resumen El objetivo de este trabajo fue proponer un modelo de ecuaciones latentes que estructure la relación entre engagement académico, schadenfreude y comportamiento prosocial sobre el clima escolar. Se trabajó con una metodología cuantitativa en base a un diseño transversal-transeccional y un muestreo no probabilístico de 437 estudiantes de educación secundaria en Chile. Se realizó análisis factorial y de confiabilidad de los instrumentos aplicados, correlaciones de Pearson y ecuaciones estructurales. Después de ajustar dos modelos para los datos y contrastarlos con la literatura teórica, se encontró que el engagement académico afecta a todas las variables. El engagement académico afecta de manera positiva, directa e indirectamente al clima escolar. Un aumento del engagement académico también disminuye los niveles de schadenfreude y provoca un incremento de los niveles del comportamiento prosocial. Se discute sobre las implicancias de estos hallazgos, sus limitaciones y se proponen sugerencias que podrían orientar el estudio e intervención del clima escolar.

Resumo O objetivo deste trabalho foi propor um modelo de equação latente que estrutura a relação entre engajamento acadêmico, fraude e comportamento pró-social no clima escolar. Foi usado metodologia quantitativa baseada em um desenho transversal e uma amostra não probabilística de 437 estudantes do ensino médio (Chile). As escalas de Clima Escolar, Engagement UWES-S 9, Inventário de comportamentos pró-sociais no contexto escolar e Schadenfreude scale foram aplicadas. Análise fatorial e de confiabilidade dos instrumentos aplicados, correlações de Pearson e equações estruturais foram realizadas. Após ajustar dois modelos para os nossos dados e contrastá-los com a literatura teórica, constatou-se que o engagement acadêmico afeta todas as variáveis. O engajamento acadêmico afeta positivamente, direta e indiretamente, o clima escolar. Um aumento no engajamento acadêmico também reduz os níveis de schadenfreude e causa um aumento nos níveis de comportamento pró-social. As implicações desses achados, suas limitações e sugestões que podem orientar o estudo e a intervenção do clima escolar são discutidas.

ABSTRACT In order to provide information on the current knowledge about the native fish Dormitator latifrons and identify the gaps that must be filled to achieve correct resource management, a scientometric study was carried out using different scientific databases. A total of 103 publications were registered between the years 1972 and 2021. Results indicate that the species has been addressed since 2001 with less than one publication per year, with 2008 being the year with the highest number of publications (10). The main topics addressed were ecology, physiology, and parasitology of fish. The available knowledge generated about the species is concentrated in 68 journals, with Mexico as the most productive country, followed by USA and Ecuador, and the most productive research centers about this fish were Mexico’s Instituto Politécnico Nacional and Universidad de Guadalajara. A total of 285 authors were detected contributing knowledge to the species, with Violante-González in the top with ten publications. The co-authorship co-occurrence maps suggest there is no solid collaborative relationship between the scientific community and that the information generated is insufficient for conserving and exploiting this fish. It is essential to increase the study of thematic areas that allow their comprehensive management in the medium term; topics like reproduction in captivity, aquaculture, and nutrition must be addressed in the future to assure a sustainable use of this resource.

Abstract: This paper presents a theoretical analysis of transgression in Georges Bataille, seeing it as a key moment in the production and reproduction of society and its subjects. Based on authors from different theoretical traditions, it reconstructs fundamental axioms that explain why ritual transgression maintains and reproduces the social order, functioning as an escape valve for social energy. The final section distinguishes the ideas of transgression as a questioning of the political and as a horizon for the production of subjectivity.

Resumen: Este artículo presenta un análisis teórico de la noción de transgresión en Georges Bataille como momento clave en los procesos de producción y reproducción de la sociedad y sus sujetos. Para ello, con base en autores de diferentes tradiciones teóricas, se reconstruyen los axiomas fundamentales que permiten explicar por qué la transgresión ritual mantiene y reproduce el orden social en tanto válvula de escape de la energética social. En la sección final, a modo de conclusión, se separa la idea de la transgresión como cuestionamiento de lo político y como horizonte de producción de la subjetividad.

Abstract The relationship of body weight and length with sperm load and spermatophore weight was evaluated in wild males of Macrobrachium tenellum (Smith, 1871). In addition, the influence of a commercial and natural feed on the load and viability of sperm was determined in wild males. In 28 wild males spermatophore extraction was performed by electrostimulation 24 h after capture to analyze the relationship between body length/weight and sperm load and viability, respectively. Spermatophore weight (SW), total number (TS), dead (DS) and abnormal sperm cells (AS) were used as indicators of sperm viability. The results obtained show that there is a positive correlation between TS per spermatophore compared to body length and weight of the male. To study the effect of different diets on sperm load, three diets were employed: Diet A, commercial shrimp feed; Diet B, natural feed (mixture of squid, sardine and clam); and Diet C, combination of natural and commercial diet. To assess the initial reproductive status of the males at the beginning of the experiment, sperm viability was determined in a subsample of specimens after capture. Broodstock were fed ad libitum once a day during 70 days. TS, DS, AS and SW were evaluated. The results of the bioassay did not show differences between treatments in the parameters analyzed, except DS, which was higher in the initial group. In conclusion, the present work suggests that it is feasible to substitute fresh feed for an artificial diet for the maintenance in captivity of male M. tenellum broodstock shrimp.

Abstract: The increase in extreme events caused by climate change carries the need of building coping capacities and empowerment among susceptible and exposed communities before these risky episodes. The aim of the present study was to clarify the relationship between collective active coping strategies and post-traumatic growing, considering empowerment as a possible mediator. Using a purposive non-probabilistic sampling, 324 households affected by a climatologic disaster in Copiapó (Chile) were surveyed, assessing their coping capacities, empowerment, their impact-of-the-event perceptions, and reassessment of positive changes. For data analysis, descriptive statistics, Pearson correlation, multiple regression analysis, and simple mediation analysis were performed. Results indicate that active coping capacities correlated directly with post-traumatic community growth, and this association was partially mediated by empowerment according to a path analysis with bootstrapping method. This research contributes to better understanding adaptive coping strategies, particularly focusing on disaster events as potential opportunities for development and wellbeing within specific empowering contexts. In addition, we propose that it is necessary to critically examine current models of community resilience against socionatural disasters.

Resumen: El incremento de eventos extremos a causa del cambio climático ha conllevado la necesidad de fortalecer las capacidades de afrontamiento y empoderamiento de las comunidades expuestas-susceptibles a estos riesgos. El objetivo del presente estudio fue esclarecer la relación entre las estrategias colectivas de afrontamiento activo y el crecimiento postraumático comunitario, considerando como posible mediador el empoderamiento. Por medio de un muestreo intencionado no probabilístico se encuestó a 324 hogares afectados por un desastre climatológico en Copiapó, Chile, a los cuales se midió en capacidades de afrontamiento, empoderamiento, percepción de impacto al evento y reevaluación de cambios positivos. Para el análisis de datos, se utilizó estadísticas descriptivas, correlación de Pearson, regresión lineal múltiple y análisis de mediación simple. Los resultados indican que las capacidades activas de afrontamiento correlacionaron directamente con el crecimiento postraumático y que esta relación estuvo mediada parcialmente, de acuerdo con un modelo de análisis de rutas con bootstrapping, por el empoderamiento. La investigación contribuye a la profundización de las capacidades adaptativas de afrontamiento, sugiriendo que estos eventos pueden conllevar oportunidades de desarrollo y bienestar bajo contextos empoderadores. También propone la necesidad de operacionalizar y complejizar los modelos existentes de resiliencia comunitaria ante desastres socionaturales.

ABSTRACT The development of native fish aquaculture represents an important alternative to mitigate ecological displacement generated by exotic fish. The introduction of native fish in polyculture systems with high commercial value fishes has provided a useful strategy for sustainable aquaculture development. The present study aims to provide information on tilapia, as an exotic species, and Dormitator latifrons, as a native species, in a duo culture not programmed as such. Using juveniles of Pacific fat sleeper D. latifrons leftovers from another experiment, we decide to analyze and report the biological feasibility of a duoculture system with this species and Nile tilapia (Oreochromis niloticus). Two hundred fifty organisms of each species were placed for 90 days in a concrete tank with a capacity of 50 m3 to evaluate the compatibility of these species. The biological variables measured were growth, survival, feed conversion rate, and protein efficiency. The findings suggest a good interaction between species, with adequate growths and a survival rate of 98%. No antagonistic behavior was observed during confinement, suggesting the duoculture of these species may represent a good alternative for tropical sustainable aquaculture.

Abstract Background: We are facing a global crisis that threatens the survival of the planet. Although during the last decades a set of measures have been suggested to tackle this global crisis, results have not been auspicious. State of the art: Given the important role of professionals in modern societies, in this work it is argued that a systematic development of professional identity during the initial training is key for sustainable development. It is proposed that this professional identity could be built based on the following dimensions: (a) integration of subjective, professional, and scientific knowledge, (b) creativity to address current and future problems, (c) prosociality, and (d) ecology. The objective of this work is to support such urgency in order to respond to the global crisis and provide suggestions that guide the systematic development of professional identity during the initial training based on these dimensions. Conclusions: From the review of scientific literature, the need to systematically form the professional identity based on the aforementioned dimensions is argued, and suggestions are provided in this regard.

Resumen Antecedentes: nos encontramos ante una crisis global que amenaza la subsistencia del planeta. Aunque durante las últimas décadas se han propuesto un conjunto de medidas para enfrentar esta crisis global, los resultados no han sido auspiciosos. Estado del arte: dado el importante rol de los profesionales en la sociedad, en este trabajo se argumenta que un desarrollo sistemático de la identidad profesional en la formación inicial es clave para el desarrollo sustentable. Se propone que esta identidad profesional podría construirse en base a las dimensiones (a) integración de saberes subjetivos, profesionales y científicos, (b) creatividad para abordar los problemas actuales y futuros, (c) prosocial y (d) ecológica. El objetivo de este trabajo es sustentar la urgencia de lo mencionado para dar respuesta a la crisis global y proporcionar sugerencias que orienten el desarrollo sistemático de la identidad profesional durante la formación inicial, en base a estas dimensiones. Conclusiones: a partir de la literatura científica, se argumenta la necesidad de formar sistemáticamente la identidad profesional en base a estas dimensiones, proporcionando sugerencias al respecto.

ABSTRACT The present work is a review of the literature on the native Mexican fish Dormitator latifrons. The aim is to contribute to the integration and systematization of current knowledge to make it easier to identify existing knowledge gaps and breakthroghs Moreover, promote the successful cultivation and protection of this species whose consumption is increasing in Latin America. A review of the articles related to D. latifrons published in international and regional databases was carried out. The articles reviewed focus on taxonomy and systematics, phylogenetic, geographic distribution, ecology, physiology, reproduction, development, pathology, health, and the technologies used to cultivate this fish species. The conclusion is that, even though the cultivation of D. latifrons is of commercial interest in some countries, there are still significant gaps in our knowledge of biology and, consequently, the domestication potential of the species. Filling these gaps will require systematic research efforts on protecting natural populations and improving mass cultivation techniques.

ABSTRACT Groups of Dormitator latifrons in triplicate (4.1 ± 2.0 g and 6.2 ± 1.0 cm) were fed experimental diets containing four levels of substitution of fishmeal (FM) by soybean meal (SM) (0, 40, 70, and 100%, respectively). The diets were formulated to be isoproteic (35% crude protein) and isolipidic (8.0% crude lipids). The effect of each treatment on growth was evaluated and its implications on the cost of feeding. After 60 days of feeding, there were no significant differences in the fish’s proximate composition (P < 0.05). There were no significant differences between the diets (P < 0.05) in the evaluated biological indices: total growth increase (TGI), specific growth rate (SGR), thermal growth coefficient (TGC), and survival (%). Feeding costs decreased significantly as the proportion of soybean meal in the diet increased. The results indicated that substituting FM by up to 100% of SM can promote adequate growth in D. latifrons without affecting body composition and survival while also reducing operative costs during the fattening process.

RESUMO O objetivo deste trabalho foi descrever e interpretar as teorias subjetivas (TS) da convivência escolar (CE), de um grupo de pais e mães de uma escola de educação primária chilena. Uma amostragem teórica foi utilizada e se aplicaram grupos de discussão e entrevistas episódicas em 16 pais e mães de uma escola de educação primária. Os dados foram analisados através da técnica da teoria fundamentada (Grounded Theory), encontrando: (a) teorias subjetivas simples, mas que proporcionam aos pais educar seus filhos na convivência; (b) fatores associados à CE e propostas de melhoria; (c) além de um papel educativo dos pais que se organiza em três níveis para ensinar seus filhos a conviver na escola. Na discussão é analisada a implicação das teorias subjetivas na convivência escolar e no papel parental.

ABSTRACT The aim of this work was to describe and to interpret subjective theories about school coexistence in a group of parents from a Chilean primary school. A theoretical sample was used, group discussions and episodic interviews were conducted to 16 parents from a primary school. Data was analyzed through grounded theory, finding (a) simple subjective theories lead parents to raise their children on an environment-based approach; (b) associated factors with school coexistence environment and emerging proposals to improve them; (c) as well as a schooling parental role that it organizes around three levels of climate schooling teaching. In the discussion section, we analyze implications of these subjective theories into schooling environment and parental role.

RESUMEN El objetivo de este trabajo fue describir e interpretar las TS de la convivencia escolar, de un grupo de padres y madres de una escuela de educación primaria chilena. Se utilizó un muestreo teórico y se aplicaron grupos de discusión y entrevistas episódicas a 16 padres y madres de una escuela de educación primaria. Los datos se analizaron mediante la técnica de la teoría fundamentada, encontrando (a) teorías subjetivas simples, pero que disponen a los padres a educar a sus hijos en convivencia; (b) factores asociados a la CE y propuestas para su mejora, (c) además de un rol parental educativo que se organiza en tres niveles para enseñar a sus hijos a convivir en la escuela. En la discusión se analiza la implicancia de estas teorías subjetivas en la convivencia escolar y el rol parental.

Abstract Understanding the upstream migration of amphidromous prawns is important to address the impact of anthropomorphic activities in natural freshwater ecosystems. The ability of Macrobrachium tenellum (Smith, 1871) juveniles to overcome an artificial barrier was evaluated, simulating an obstacle in their upstream migration, under an experimental laboratory system. The prawns were collected from a stream located in Puerto Vallarta, Mexico (N = 1000). An experimental recirculation system was used, which consisted of a tank with a capacity of 600 L, a sheet of galvanized steel that acted as an anthropogenic barrier and two submersible electric pumps with flows of 0.12 L/s and 0.40 L/s. In this system, two inclinations of the barrier were tested, 45° and 90° in combination with the two flows. The results show that there are significant differences between the treatments with different inclinations, where a higher stimulation response was observed at the 90° angle. Within this inclination, the flow of 0.40 L/s produced the highest stimulation to climb the barrier in prawns between 30 and 60 mm in length. This study demonstrates the direct relationship between the slope and the effect of water flow of the anthropogenic barriers that hinder the migration process of M. tenellum.