Search

Accounting for marine stocks spatiotemporal complexity has become one of the most pressing improvements that should be added to the new generation of stock assessment. Disentangling persistent and dynamic population subcomponents and understanding their main drivers of variation are still stock-specific challenges. Here, we hypothesized that the spatiotemporal variability of density in two adjacent fish stocks is associated with spatially structured environmental processes across multiple spatiotemporal scales. To test this, we applied a generalized empirical orthogonal function and dynamic factor analysis to fishery-independent and -dependent data of red mullet, a highly commercial species, in the Western Mediterranean Sea. Areas with persistent and dynamic high aggregations were detected for both stock units. A large-scale climatic index and local open-ocean convection were associated with both stocks, while other variables exhibited stock-specific effects. We also revealed spatially structured density dynamics within the examined management units. This suggests a metapopulation structure and supports the future implementation of a spatial stock assessment. Considering the common—generally unrealistic—assumptions of panmictic structure and absence of connectivity with neighbouring stock units, our methodology can be applied to other species and systems with putative spatial complexity to inform more accurate population dynamics and structure.

The objective of this study was to apply, through boxing, the Teaching Personal and Social Responsibility Model (TPSR, Hellison, 2011) in a group of adolescents at risk of social exclusion. Concretely, the study analysed the effects of the boxing program in the following variables: motivation to physical activity, attitudes towards violence, aggressive behaviour, self-esteem and the consumption of tobacco, alcohol, and other drugs. The boxing program was applied during nine weeks, with a frequency of three 1-hour sessions per week. A quantitative research methodology and a quasi-experimental design were implemented, with a total of 11 male participants aged between 15 and 18 years (5 belonging to the intervention group and 6 to the control group). All the participants completed the selected questionnaires to measure the study variables, both at the beginning and at the end of the boxing program. The results indicated an increase of intrinsic motivation toward physical activity, and a decrease in external and introjected regulation, in the intervention group regarding the control group. There was no reduction in the consumption of tobacco, alcohol and other drugs, but neither an increase of attitudes towards violence or aggressive behaviour. The results indicate that boxing can be an appropriate sport for young people at risk of social exclusion, provided that it is based on the pertinent theoretical framework., El objetivo del presente estudio fue aplicar el Modelo de Responsabilidad Personal y Social (MRPS, Hellison, 2011) a través del boxeo en un grupo de adolescentes en riesgo de exclusión social. Concretamente, se analizaron los efectos del programa de boxeo en la motivación hacia el ejercicio físico, las actitudes hacia la violencia, el comportamiento agresivo, la autoestima y determinados hábitos nocivos como el consumo de tabaco, alcohol y otras drogas. El programa fue aplicado durante nueves semanas, con una frecuencia de tres sesiones semanales de una hora. Se implementó una metodología de investigación cuantitativa y un diseño cuasi-experimental con un total de 11 participantes varones de 15 a 18 años (5 pertenecientes al grupo de intervención y 6 al grupo control). Todos los participantes cumplimentaron los cuestionarios seleccionados para la medición de las variables de estudio, tanto al inicio como al término del programa de boxeo. Los resultados indicaron un aumento de la motivación intrínseca hacia el ejercicio físico, y una reducción de la regulación externa e introyectada, en el grupo de intervención respecto al grupo control. Tras el programa de boxeo no se logró una reducción del consumo de tabaco, alcohol y otras drogas, pero tampoco aumentaron las actitudes hacia la violencia o el comportamiento agresivo. Los resultados indican que el boxeo puede ser un deporte apropiado para los jóvenes en riesgo de exclusión social si se enfoca desde el referente teórico adecuado.

All the data referring to the circulation of Quixote on the very hispanised peninsula constituting the Kingdom of Naples during the 15th century are a precious testimony of its reception. This has been documented through notarial acts, particularly those concerning inventory of goods, and comments regarding the political-literary context. This study is based on an inventory preserved in Archivio di Stato di Napoli, which displays a copy of Quixote on the library of the judge Camillo Cacace. This work briefly explains the collection of Spanish books he owned. It also links the reception of this work to other documents, which illustrates the critical reception of Quixote in the Spanish Naples., Los datos referidos a la circulación del Quijote en un área de la península tan hispanizada como el reino de Nápoles durante el siglo XVII son un testimonio precioso de su recepción, documentada a través de actos notariales, especialmente los referentes a inventarios de bienes, y de comentarios que aparecen tanto en una polémica político-literaria entre facciones cuanto en el seno de una obra literaria valiosa. Partiendo de un inventario conservado en el Archivio di Stato di Napoli que demuestra la presencia de un ejemplar del Quijote en la biblioteca del magistrado Camillo Cacace, el trabajo da cuenta brevemente de la colección de libros españoles poseída por este, a la vez que intenta poner en relación esta recepción personal de la obra por parte de Cacace con otros documentos que ilustran la primera recepción crítica del Quijote en la Nápoles española.

Fish body condition and growth are two interrelated traits closely associated with species life history and fitness, whose trade-off can ultimately impact population dynamics albeit seldom empirically demonstrated. They can intricately affect survival rates, which are particularly relevant for species under exploitation. Using individual spatiotemporal information in Northwestern Mediterranean, we document for the first time the existence of a trade-off between condition and growth in regulating survival dynamics in two important fish species for the Mediterranean fisheries that are characterized by contrasting life histories. For the European hake (Merluccius merluccius), a benthopelagic species, juveniles' body condition was detected to be positively linked to survival and negatively associated with the growth of this age group. For the red mullet (Mullus barbatus), the same pattern was observed for young adults. We also show that the observed patterns on a regional level have a clear spatial dependence as we found that observed body condition over a local scale had a broad effect on the population dynamics of the whole region, with the Ebro delta area emerging as the demographic engine of the two species. We discuss our results in the context of fisheries management and underline the importance of improving current stock assessment models and spatially based fishery management towards incorporating body condition and growth due to their influence on important parameters such as survival.

Marine organisms can disperse actively and passively. During early life stages, eggs and larvae of a plethora of taxa may be subject to transport over large distances by ocean currents, while adults often exhibit rather sedentary behaviors. Next generation stock assessment schemes broadly call for the need to include climate and oceanographic considerations, yet little progress has been made globally towards this direction. Red mullet Mullus barbatus is an important demersal resource in the Mediterranean with relatively long pelagic early-life stages suggesting a large dispersal potential. Here, we use two different putative stocks of red mullet in the Western Mediterranean Sea to test the effects of surface currents on the demography and inter- and intra-stock individual exchanges. The connectivity between spawning and nursery areas was investigated by simulating multi-annual lagrangian indices of larval retention, import, and self-recruitment. Our study demonstrates a certain degree of inter-stock connectivity along the main corridors of transport but also a substantial variability with some years when population sub-units appear to be more isolated. Regarding intra-stock metrics, we found that the main persistent spawning area of the Northern Spanish Coast stock may act as an export of individuals ending up in coastal nursery areas further south within or even outside the boundaries of the stock unit. By evaluating the passive dispersal and its impact on the spatial population structure and the intra-stock spatial dynamism of an exploited resource, our study provides insights to improve fisheries management with the incorporation of information on physical oceanography (from observing systems and operational models). Importantly, our methodology may readily be applied to other systems and/or be combined with additional methods (e.g., chemical, molecular or artificial markers) to facilitate the improvement of current management schemes and inform conservation stra