Primer registro del género Roestes Gunter, 1984 (Pisces: Characidae) para Colombia

Este estudio registra por primera vez para Colombia, la presencia del género Roestes en lagunas pertenecientes al plano de inundación de ríos de la cuenca alta del río Caquetá. El género fue colectado en la laguna de Bekochiará de la cuenca del río Orteguaza y en la laguna de Cartagena de Chairá de la cuenca del río Caguán. Los individuos presentan afinidad morfológica con la especie Roestes molossus (Kner, 1860) y su descubrimiento en esta área periférica de la Amazonia confirma la posibilidad planteada por Menezes (1974), de encontrar esta especie en otras cuencas altas de tributarios del río Amazonas, diferentes a las del río Madeira y Juruá

Trichomycterus venulosus (Steindachner, 1915): posible especie extinta del páramo de Cruz Verde (Cundinamarca, Colombia)

The investigation was carried out between November 2004 and August 2005, and was based on the rivers Teusaca, Idaza, La Laguna (Quebrada Blanca), del Salteador creek, Marlene creek (affluent of the del Salteador creek), Blanca creek (Mataredonda-Reserve) and El Charco creek (affluent of Santa Barbara creek). All the rivers, with exception of the river Teusaca (Magdalena river basin), are part of the El Palmar river basin (Orinoco river basin). The waters are characterized by low conductivity (<52 μS cm-1), low temperature (11-14 °C), acid pH (5,5–6,3) and a high oxygen concentration (>90%). According to our field observations, some small forested areas still exist, and the soil is mainly used for agriculture (potato culture) and livestock farming

Effects of aquatic vegetation on the spatial distribution of grundulus bogotensis, humboldt 1821 (characiformes: characidae)

G. bogotensis has a geographic distribution restricted to the Colombian Cundiboyacenseplateau, it is listed as near threatened, and research on its autoecology is scarce. Threecollections were made in 2006 in the Fúquene Lake, Cundinamarca, Colombia (5°27’ 55’’ N, 75° 46’ 19’’ W) to describe the habitats occupied by G. bogotensis and todetermine its vertical and horizontal distribution. Three sampling zones were selectedaccording to the type of dominant macrophyte (Eichornia crassipes, Schoenoplectussp. and Egeria densa). In each sampling zone two different cylindrical sampling traps(cloth and PVC) were placed at three depths: surface, mid-depth and bottom. Threereplicates were used for each depth and type of trap. Traps were exposed for 24 hoursand checked every 6 hours. In addition to the traps, sampling by electrofishing wasconducted in each sampling zone during every month. To characterize the study area,physical and chemical variables were analyzed and the structure of phytoplankton,zooplankton, periphyton, and macroinvertebrate communities was studied. Resultsshowed spatial differences on G. bogotensis habitat occupation and differences incaptures at each depth, which depend on the dominant type of aquatic vegetationand size of individual. We conclude that only cylindrical cloth traps are suitable toconduct population studies of G. bogotensi

Composition and fish species richness in piedmont streams and rivers of the Cusiana River drainage in the Colombian Orinoco River Basin

In order to provide information on the composition and richness of fish in the Colombian Orinoco piedmont (Tauramena - Casanare), collections were made every two months (June 2012 - February 2013), and standardized (arts-length-time), for six streams and three rivers from de Cusiana River piedmont, Orinoco River Basin, Colombia. 88 species where registered, 33 found on streams and 78 on rivers, there all grouped into six orders, 24 families and 56 genera. Two orders: Characiformes (43 sp.) and Siluriformes (34 sp.) and two families: Characidae (27 sp.) and Loricariidae (15 sp.) had the highest species richness. The results obtained increase the number of species to from the Cusiana River drainage by 26 species, for a new total of 141 species; nine of these had been considered endemic to other sub-drainages. There was also a record of a new order and family (Synbranchiformes: Synbranchidae) and a new genus Ceratobranchia. Eight of the reported species of the reported species require further confirmation because they are new records. The importance of fish diversity and human intervention that the Cusiana River drainage is suffering makes this research a tool for the conservation of this aquatic ecosystems and its fish species

Composición y riqueza íctica en quebradas y ríos del piedemonte de la cuenca del río Cusiana, Orinoquia colombiana

In order to provide information on the composition and richness of fish in the Colombian Orinoco piedmont (Tauramena - Casanare), collections were made every two months (June 2012 - February 2013), and standardized (arts-length-time), for six streams and three rivers from de Cusiana River piedmont, Orinoco River Basin, Colombia. 88 species where registered, 33 found on streams and 78 on rivers, there all grouped into six orders, 24 families and 56 genera. Two orders: Characiformes (43 sp.) and Siluriformes (34 sp.) and two families: Characidae (27 sp.) and Loricariidae (15 sp.) had the highest species richness. The results obtained increase the number of species to from the Cusiana River drainage by 26 species, for a new total of 141 species; nine of these had been considered endemic to other sub-drainages. There was also a record of a new order and family (Synbranchiformes: Synbranchidae) and a new genus Ceratobranchia. Eight of the reported species of the reported species require further confirmation because they are new records. The importance of fish diversity and human intervention that the Cusiana River drainage is suffering makes this research a tool for the conservation of this aquatic ecosystems and its fish species.Con el objeto de proporcionar información sobre la composición y riqueza de los peces del piedemonte de la Orinoquia colombiana (Tauramena - Casanare), se realizaron colectas bimestralmente (junio 2012- febrero 2013) y estandarizadas (artes-longitud-tiempo), para seis quebradas y tres ríos del piedemonte de la cuenca del río Cusiana, cuenca del Orinoco, Colombia. Se registraron 88 especies, 33 en quebradas y 78 para los ríos, agrupadas en seis órdenes, 24 familias y 56 géneros. La mayor riqueza la presentaron los órdenes Characiformes (43 sp.) y Siluriformes (34 sp.) y las familias Characidae (27 sp.) y Loricariidae (15 sp.). Los resultados obtenidos incrementan el número de especies para la cuenca media del río Cusiana en 26, para un total de 141. Nueve de estas habían sido consideradas como endémicas para otras subcuencas, registrándose un nuevo orden y familia (Synbranchiformes: Synbranchidae) y un género Ceratobranchia. Ocho especies de las reportadas necesitan ser confirmadas pues se trata de nuevos reportes. La importancia de la diversidad íctica y la intervención antrópica que sufre la cuenca del río Cusiana, hacen de esta investigación una herramienta para la conservación de estos ecosistemas acuáticos y sus especies de peces

A database of freshwater fish species of the Amazon Basin

The Amazon Basin is an unquestionable biodiversity hotspot, containing the highest freshwater biodiversity on earth and facing off a recent increase in anthropogenic threats. The current knowledge on the spatial distribution of the freshwater fish species is greatly deficient in this basin, preventing a comprehensive understanding of this hyper-diverse ecosystem as a whole. Filling this gap was the priority of a transnational collaborative project, i.e. the AmazonFish project - https://www.amazon-fish.com/. Relying on the outputs of this project, we provide the most complete fish species distribution records covering the whole Amazon drainage. The database, including 2,406 validated freshwater native fish species, 232,936 georeferenced records, results from an extensive survey of species distribution including 590 different sources (e.g. published articles, grey literature, online biodiversity databases and scientific collections from museums and universities worldwide) and field expeditions conducted during the project. This database, delivered at both georeferenced localities (21,500 localities) and sub-drainages grains (144 units), represents a highly valuable source of information for further studies on freshwater fish biodiversity, biogeography and conservation

Relación entre comunidad íctica y cobertura vegetal riparia en dos períodos hidrológicos (Eje Cafetero, Colombia)

Relationship between fish community and riparian vegetation cover in two hydrological periods (Coffee-growing region, Colombia)Objective. To assess the relationship between structure and diet of the fish community and the riparian vegetation cover (RVC), in twohydrological periods (HYPE) in streams of the La Vieja river basin. Materials and methods. Collections were done with electrofishingand rapiché in March and May 2010. Efficiency of sampling effort was assessed with the estimator Chao2. Structure was analyzedusing the indices of richness, dominance, diversity and evenness which were compared with an ANOVA. Gastrointestinal contents wereanalysed with the indices of vacuity coefficient, frequency, volume and food importance. We examined the relationship among diet,HYPE and RVC using the multiple correlation coefficient (r), the coefficient of determination (r2) and a Canonical CorrespondenceAnalysis (CCA). Results. According to the Chao2 estimator, in most streams the fish species richness values are representative. Therewere no significant differences (P>0.05) among the structural variables, the HYPE and the RVC. According to r and r2 the diet of most fish species did not vary as a function of RVC and HYPE; however, according to the CCA diet varies as a function of HYPE but not of RVC. Conclusions. The fish community structure did not show changes according to RVC and HYPE. Although most species showedno changes in their diet, the community did show changes in diet according to HYPE, due to a change in composition; however dietchanges were not detected by RVC

METADATO DE LA COLECCIÓN DE PECES DEL MUSEO JAVERIANO DE HISTORIA NATURAL LORENZO URIBE, S.J.

Gran parte de la información sobre biodiversidad se encuentra contenida en catálogos de Colecciones Biológicas. Con el objetivo de aumentar la divulgación de información surge la necesidad de buscar medios que permitan el intercambio de estos conjuntos de datos. El metadato de la base de datos de la Colección de Peces del Museo Javeriano de Historia Natural “Lorenzo Uribe, S.J.”, contribuye al conocimiento sobre la biodiversidad de peces de Colombia, constituyéndose en el cuarto metadato publicado sobre el tema para el país. Para su elaboración se realizó la digitación de la información contenida en el catálogo en una base de datos Access; la revisión del estándar de metadatos propuesto por el Sistema de Información sobre Biodiversidad de Colombia (SIB) y la utilización de la aplicación Multistandard, Multilingual, Metadata Cataloguing Tool (M3Cat) a través de un explorador web. Este metadato estará disponible para su consulta en la página Web del SIB

Relação da comunidade de peixes e o tipo de cobertura da vegetação ripária em dois períodos hidrológicos, em córregos da bacia do Rio “La Vieja”, “Eixo Cafeteiro” da Colômbia.

Objective. To assess the relationship between structure and diet of the fish community and the riparian vegetation cover (RVC), in two hydrological periods (HYPE) in streams of the La Vieja river basin. Materials and methods. Collections were done with electrofishing and rapiché in March and May 2010. Efficiency of sampling effort was assessed with the estimator Chao2. Structure was analyzed using the indices of richness, dominance, diversity and evenness which were compared with an ANOVA. Gastrointestinal contents were analysed with the indices of vacuity coefficient, frequency, volume and food importance. We examined the relationship among diet, HYPE and RVC using the multiple correlation coefficient (r), the coefficient of determination (r2) and a Canonical Correspondence Analysis (CCA). Results. According to the Chao2 estimator, in most streams the fish species richness values are representative. There were no significant differences (P>0.05) among the structural variables, the HYPE and the RVC. According to r and r2 the diet of most fish species did not vary as a function of RVC and HYPE; however, according to the CCA diet varies as a function of HYPE but not of RVC. Conclusions. The fish community structure did not show changes according to RVC and HYPE. Although most species showed no changes in their diet, the community did show changes in diet according to HYPE, due to a change in composition; however diet changes were not detected by RVC. Key words: coffee-growing region, diet, fish community, hydrological period, riparian vegetation cover, structure.Objetivo. Evaluar la relación entre estructura y dieta de la comunidad íctica y la cobertura vegetal riparia (CVR) en dos períodos hidrológicos (PEHI) en riachos de la cuenca del Río La Vieja.  Materiales y métodos. Las colectas fueron realizadas con electropesca y rapiché en marzo y mayo de 2010. La eficiencia del esfuerzo muestral fue evaluada con el estimador Chao2. La estructura fue analizada mediante los índices: riqueza, dominancia, diversidad y equidad, siendo comparados a través de un ANOVA. Los contenidos gastrointestinales se analizaron usando los índices: coeficiente de vacuidad, frecuencia de ocurrencia, volumétrico e importancia alimentaria. Para analizar la relación entre  dieta, PEHI y CVR se utilizó el coeficiente de correlación múltiple (r), el coeficiente de determinación (r2) y un Análisis de Correspondencias Canónicas (ACC).  Resultados. Según el estimador Chao2, en la mayoría de los riachos los valores de riqueza íctica en estos ambientes sonrepresentativos. No existen diferencias significativas (P>0,05) entre las variables  estructurales, el PEHI y lasCVR.  Según el r y r2, la dieta de la mayoría de las especies no varió en función de la CVR y el PEHI.  Sin embargo, según el ACC la dieta varió en función del PEHI pero no en función de la CVR.  Conclusiones. La estructura de la comunidad íctica no presentó cambios según la CVR o el PEHI.  Aunquela mayoría de especies no cambiaron dedieta, la comunidad si presenta cambios en esta en función del PEHI, debido al cambio en la composición; no obstante, los cambios de dieta no se detectaron por tipo de CVR.Palabras clave: cobertura vegetal riparia, período hidrológico, comunidad de peces, estructura, dieta, Eje Cafetero. Objetivo. Avaliar a relação entre  estrutura e  dieta da comunidade de peixes ea  cobertura da vegetação ripária (CVR) em dois períodos hidrológicos (PEHI), em córregos da bacia do Rio “La Vieja”. Materiais e métodos. As coletas foram realizadas com pesca elétrica e rapiché em março e maio de 2010.  A eficiência do esforço amostral foi avaliada com o estimador Chao2. A estrutura foi analisada através dos índices de riqueza, diversidade, dominância e equidade, e comparados pelo teste ANOVA.  A dieta foi analisada pelos conteúdos gastrointestinales, utilizando-se os índices: coeficiente de vacuidade, freqüência de ocorrência, volume e importância alimentar. Para examinar a relação entre dieta, PEHI e CVR foram utilizados o coeficiente de correlação múltipla (r), o coeficiente de determinação (r2) e Análise de Correspondência Canônica (ACC). Resultados.  De acordo com o estimador Chao2 na maioria dos córregos os valores da riqueza de peixes nestes ambientes foram representativos. Não existem diferencias significativas (P>0,05) entre as variáveis estruturais,  tipo de CVR e PEHI.  Segundo o r eo r2, a dieta da maioria das espécies variou em função da CVR e PEHI.  Embora, analizando a dieta da comunidade e segundo o ACC, a dieta variou em função do PEHI mas não em função da CVR.  Conclusões. A estrutura da comunidade de peixes não apresentou mudanças segundo a CVR ou PEHI.  Apesar que a maioria de espécies não apresentaram mudanças em sua dieta, a comunidade sim apresenta mudanças em esta em função do PEHI, devido á mudança na composição; embora, as mudanças na dieta não foram detectadas segundo o CVR. Palavras-chave: Cobertura vegetal ripária, período hidrológico, comunidade de peixes, estrutura, dieta, Eixo Cafeteiro