Evaluación del lavado gástrico como herramienta para el análisis de la dieta en trucha común

Se ha estudiado la eficacia del método de extracción del contenido estomacal mediante el procedimiento de lavado estomacal a través de una bomba diseñada a partir del modelo original de Seaburg (1957). La efectividad del método no esta relacionada con el tamaño del pez, sino más bien con las propias características morfológicas de las presas, el estado de repleción del estómago y el grado de digestión del alimento. Así, la efectividad del método está inversamente relacionada con el estado de repleción. Además, presas de gran tamaño y que presentan estructuras rígidas como los Aeshnidae y los Tricópteros con estuches son más difíciles de expulsar. No obstante, las diferencias observadas en la efectividad de expulsión entre presas con las mismas características se deben al diferente grado de digestión de las mismas. Aún así, la efectividad media del método es elevada y superior al 80 %. Se trata pues de una metodología relativamente sencilla y eficaz, por lo que su uso es adecuado para la obtención de muestras de contenido estomacal en juveniles y adultos de trucha común.The efficacy of the method of extracting stomach content, by means of the procedure of stomach washing through a pump, based on Seaburg's original model (1957), has been studied. The effectiveness of the method is not related to the size of the fish, but rather to the prey's own morphological characteristics, the degree of repletion of the stomach and the extent of digestion of the food. Thus, the effectiveness of the method is inversely related to the degree of repletion. Furthermore, bigger prey having rigid structures, such as Aeshnidae and Caddisflies with cases are more difficult to expel. However, the observed differences in the effectiveness of expulsion between preys with similar characteristics are due to the extent of their digestion. Nevertheless, the average effectiveness of the method is high and in excess of 80 %. It is therefore a relatively simple and effective methodology and the reason why its use is appropriate for obtaining stomach content samples in young and adult brown trout

Código de conduta. Prevenção da introdução e dispersão de flora e fauna exótica invasora: agentes ambientais

De forma intencional ou involuntária, o ser humano transporta espécies entre locais desde tempos imemoriais. No entanto, nos últimos 50 anos, o ritmo de introdução de espécies exóticas no meio natural acelerou de forma alarmante, tornando-se numa das principais causas de perda de biodiversidade. A globalização, juntamente com as alterações climáticas, a destruição de habitats, o aumento do trânsito de pessoas e o comércio, são hoje os principais responsáveis pela perda de biodiversidade a nível global, acarretando também graves prejuízos para a economia e a saúde humana

Corrigendum to ‘a horizon scan exercise for aquatic invasive alien species in Iberian inland waters’

info:eu-repo/semantics/publishedVersio

Código de conduta. Prevenção da introdução e dispersão de flora e fauna exótica invasora: agentes ambientais

De forma intencional ou involuntária, o ser humano transporta espécies entre locais desde tempos imemoriais. No entanto, nos últimos 50 anos, o ritmo de introdução de espécies exóticas no meio natural acelerou de forma alarmante, tornando-se numa das principais causas de perda de biodiversidade. A globalização, juntamente com as alterações climáticas, a destruição de habitats, o aumento do trânsito de pessoas e o comércio, são hoje os principais responsáveis pela perda de biodiversidade a nível global, acarretando também graves prejuízos para a economia e a saúde humana

Lista actualizada de las especies exóticas acuáticas introducidas y establecidas en las aguas continentales ibéricas

62 páginas. IlustradoSe presenta una lista actualizada de las especies exóticas que se encuentran en etapa de establecimiento o de propagación de la invasión en aguas continentales de la península ibérica. La lista está basada en la evaluación sistemática de los datos en colaboración con un amplio equipo de expertos de España y Portugal. Esta lista de actualización es un instrumento de apoyo importante para la aplicación del Reglamento de la Unión Europea (UE) sobre las especies exóticas invasoras (EEI) y también proporciona una base objetiva para el examen de su aplicación. En última instancia, la información incluida puede utilizarse para supervisar el cumplimiento del objetivo de la Estrategia de la UE sobre diversidad biológica hasta 2030 para combatir las EEI, pero también para la aplicación de otras políticas de la UE con requisitos sobre especies exóticas, como las Directivas de Hábitats y Aves, la Directiva Marco sobre la Estrategia Marina (DMEM) y la Directiva Marco del Agua (DMA). Esta publicación es un informe técnico del Proyecto Europeo LIFE INVASAQUA (LIFE17 GIE/ES/000515). Ha sido redactado por un equipo de expertos en el marco del proyecto y tiene por objeto proporcionar apoyo, basado en pruebas científicas, al proceso de formulación de políticas europeas. La información científica aportada no implica una posición política de la Comisión Europea. Ni la Comisión Europea ni ninguna persona que actúe en nombre de la Comisión es responsable del uso que pueda hacerse de esta publicación.Este estudio fue apoyado económicamente por el proyecto LIFE INVASAQUA (Especies exóticas acuáticas invasoras de agua dulce y sistemas estuarinos: sensibilización y prevención en la Península Ibérica) (LIFE17 GIE/ES/ 000515) financiado por el Programa LIFE de la UE.Contiene: Prólogo 9 Autores y colaboradores 10 Agradecimientos 11 Acrónimos y abreviaturas 12 Resumen ejecutivo 13 1. Introducción y objetivos 16 1.1. Antecedentes 16 1.2. Objetivos de la lista y propósito del informe 17 2. Alcance y metodología de evaluación 20 2.1. Ámbito geográfico 20 2.2. Alcance del concepto de biota exótica acuática 20 2.3. Evaluación y selección de especies 22 3. Resultados 3.1. Lista 3.2. Enfoque taxonómico 4. Recomendaciones y necesidades de actualización 38 Referencias bibliográficas 39 Lista de afiliaciones de los autores 43 Lista de colaboradores 47 Apéndice A Lista de especies exóticas acuáticas definidas como establecidas (naturalizadas) en las aguas continentales ibéricas Apéndice B Lista de especies exóticas acuáticas definidas como de estado incierto y criptogénico en las aguas continentales ibéricas Apéndice C Número de especies exóticas acuáticas definidas por grupos taxonómicos (Filo, Clase y Orden) Material complementario (http://www.ibermis.org/) (http://www.lifeinvasaqua.com/

A horizon scan exercise for aquatic invasive alien species in Iberian inland waters

As the number of introduced species keeps increasing unabatedly, identifying and prioritising current and potential Invasive Alien Species (IAS) has become essential to manage them. Horizon Scanning (HS), defined as an exploration of potential threats, is considered a fundamental component of IAS management. By combining scientific knowledge on taxa with expert opinion, we identified the most relevant aquatic IAS in the Iberian Peninsula, i.e., those with the greatest geographic extent (or probability of introduction), severe ecological, economic and human health impacts, greatest difficulty and acceptability of management. We highlighted the 126 most relevant IAS already present in Iberian inland waters (i.e., Concern list) and 89 with a high probability of being introduced in the near future (i.e., Alert list), of which 24 and 10 IAS, respectively, were considered as a management priority after receiving the highest scores in the expert assessment (i.e., top-ranked IAS). In both lists, aquatic IAS belonging to the four thematic groups (plants, freshwater invertebrates, estuarine invertebrates, and vertebrates) were identified as having been introduced through various pathways from different regions of the world and classified according to their main functional feeding groups. Also, the latest update of the list of IAS of Union concern pursuant to Regulation (EU) No 1143/2014 includes only 12 top-ranked IAS identified for the Iberian Peninsula, while the national lists incorporate the vast majority of them. This fact underlines the great importance of taxa prioritisation exercises at biogeographical scales as a step prior to risk analyses and their inclusion in national lists. This HS provides a robust assessment and a cost-effective strategy for decision-makers and stakeholders to prioritise the use of limited resources for IAS prevention and management. Although applied at a transnational level in a European biodiversity hotspot, this approach is designed for potential application at any geographical or administrative scale, including the continental one

A horizon scan exercise for aquatic invasive alien species in Iberian inland waters

As the number of introduced species keeps increasing unabatedly, identifying and prioritising current and potential Invasive Alien Species (IAS) has become essential to manage them. Horizon Scanning (HS), defined as an exploration of potential threats, is considered a fundamental component of IAS management. By combining scientific knowledge on taxa with expert opinion, we identified the most relevant aquatic IAS in the Iberian Peninsula, i.e., those with the greatest geographic extent (or probability of introduction), severe ecological, economic and human health impacts, greatest difficulty and acceptability of management. We highlighted the 126 most relevant IAS already present in Iberian inland waters (i.e., Concern list) and 89 with a high probability of being introduced in the near future (i.e., Alert list), of which 24 and 10 IAS, respectively, were considered as a management priority after receiving the highest scores in the expert assessment (i.e., top-ranked IAS). In both lists, aquatic IAS belonging to the four thematic groups (plants, freshwater invertebrates, estuarine invertebrates, and vertebrates) were identified as having been introduced through various pathways from different regions of the world and classified according to their main functional feeding groups. Also, the latest update of the list of IAS of Union concern pursuant to Regulation (EU) No 1143/2014 includes only 12 top-ranked IAS identified for the Iberian Peninsula, while the national lists incorporate the vast majority of them. This fact underlines the great importance of taxa prioritisation exercises at biogeographical scales as a step prior to risk analyses and their inclusion in national lists. This HS provides a robust assessment and a cost-effective strategy for decision-makers and stakeholders to prioritise the use of limited resources for IAS prevention and management. Although applied at a transnational level in a European biodiversity hotspot, this approach is designed for potential application at any geographical or administrative scale, including the continental one